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Sökning: AMNE:(NATURAL SCIENCES Earth and Related Environmental Sciences Physical Geography)

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1.
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2.
  • Buckland, Philip I., 1973-, et al. (författare)
  • BugsCEP, an entomological database twenty-five years on
  • 2014
  • Ingår i: Antenna (Journal of the Royal Entomological Society). - London : Royal Entomological Society of London. - 0140-1890. ; 38:1, s. 21-28
  • Tidskriftsartikel (refereegranskat)
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3.
  • Blennow, Kristina, et al. (författare)
  • Societal impacts of storm damage
  • 2013
  • Ingår i: Living with Storm Damage to Forests. What science can tell us. - 9789525980097 ; :3, s. 70-77
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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4.
  • Buckland, Philip I., 1973- (författare)
  • The Bugs Coleopteran Ecology Package (BugsCEP) : the development and implementation of software for palaeoenvironmental and palaeoclimatological research
  • 2009
  • Bok (övrigt vetenskapligt/konstnärligt)abstract
    • This book describes the development and practical application of a unique database orientated software package, BugsCEP, for environmental, climatic and biodiversity reconstruction from beetle assemblages. BugsCEP consists of a database of ecology and distribution data for over 9400 insect taxa, and includes temperature tolerance data for 436 species. It contains abundance and summary data for over 770 sites, most of the known European Quaternary fossil coleopteran record, supported by a bibliography of over 3700 sources. Built in statistics, including a specially developed habitat classification system, provide semi-quantitative environmental reconstructions to aid in the interpretation of sites. BugsCEP's querying and reporting functions also increase the efficiency with which analyses can be undertaken, including the facility to explore the fossil record of species by searching ecology and distribution data. The Mutual Climatic Range (MCR) reconstruction method is implemented and improved upon, including predictive modelling and the graphical output of reconstructions and climate space maps. BugsCEP is available from www.bugscep.com.
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5.
  • Charpentier Ljungqvist, Fredrik, 1982- (författare)
  • Global nedkylning : klimatet och människan under 10 000 år
  • 2009
  • Bok (populärvet., debatt m.m.)abstract
    • Klimatet har förändrats både regionalt och globalt sedan senaste istiden tog slut, ofta med dramatiska konsekvenser för naturen och människan. Fastän det talas så mycket om klimatförändringar idag är det få som vet särskilt mycket om hur klimatet har varierat förr.Det är först under de senaste åren som forskningen börjat kunna beskriva vad som faktiskt hänt med klimatet under olika tider, på olika platser. Historikern Fredrik Charpentier Ljungqvist har tagit ett samlat grepp på den senaste forskningen och resultatet är en resa i vått och torrt, i hetta och kyla, jorden runt under 10 000 år. Vi får stifta bekantskap med många olika folk och kulturer – babylonier, romare, mayaindianer och vikingar – som alla under historiens gång varit utsatta för klimatförändringar.
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6.
  • Buckland, Philip I., 1973- (författare)
  • The Bugs Coleopteran Ecology Package (BugsCEP) database : 1000 sites and half a million fossils later
  • 2014
  • Ingår i: Quaternary International. - : Elsevier. - 1040-6182 .- 1873-4553. ; 341, s. 272-282
  • Tidskriftsartikel (refereegranskat)abstract
    • The Bugs database project started in the late 1980s as what would now be considered a relatively simple system, albeit advanced for its time, linking fossil beetle species lists to modern habitat and distribution information. Since then, Bugs has grown into a complex database of fossils records, habitat and distribution data, dating and climate reference data wrapped into an advanced software analysis package. At the time of writing, the database contains raw data and metadata for 1124 sites, and Russell Coope directly contributed to the analysis of over 154 (14%) of them, some 98790 identifications published in 231 publications. Such quantifications are infeasible without databases, and the analytical power of combining a database of modern and fossil insects with analysis tools is potentially immense for numerous areas of science ranging from conservation to Quaternary geology.BugsCEP, The Bugs Coleopteran Ecology Package, is the latest incarnation of the Bugs database project. Released in 2007, the database is continually added too and is available for free download from http://www.bugscep.com. The software tools include quantitative habitat reconstruction and visualisation, correlation matrices, MCR climate reconstruction, searching by habitat and retrieving, among other things, a list of taxa known from the selected habitat types. It also provides a system for entering, storing and managing palaeoentomological data as well as a number of expert system like reporting facilities.Work is underway to create an online version of BugsCEP, implemented through the Strategic Environmental Archaeology Database (SEAD) project (http://www.sead.se). The aim is to provide more direct access to the latest data, a community orientated updating system, and integration with other proxy data. Eventually, the tools available in the offline BugsCEP will be duplicated and Bugs will be entirely in the web.This paper summarises aspects of the current scope, capabilities and applications of the BugsCEP database and software, with special reference to and quantifications of the contributions of Russell Coope to the field of palaeoentomology as represented in the database. The paper also serves to illustrate the potential for the use of BugsCEP in biographical studies, and discusses some of the issues relating to the use of large scale sources of quantitative data.All datasets used in this article are available through the current version of BugsCEP available at http://www.bugscep.com.
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7.
  • Krzysztofik, Robert, et al. (författare)
  • Environmental hazards and urban abandonment: Case studies and typological issues
  • 2015
  • Ingår i: Geografiska Annaler. Series B. Human Geography. - : Informa UK Limited. - 0435-3684 .- 1468-0467. ; 97:4, s. 291-308
  • Tidskriftsartikel (refereegranskat)abstract
    • The article discusses the phenomenon of urban abandonment as a result of environmental hazards. Seen as an outcome of environmental drivers, the underlying assumption is that a characteristic of environmental hazards is their spatial and temporal constancy of impact, whereby processes and phenomena having taken place in the past have their analogies in the present. In order to generate insights for future research and policy development, there is a need to pay greater attention to the precarious relationship between humans and the natural environment, not least by drawing lessons from the past through the study of historical cases. The article clarifies the dynamic interactions of drivers and their progression through various stages of urban abandonment. This is done by recourse to an analysis of some general trends and an in-depth examination of three selected case studies from Poland. It has two objectives. The first is to identify the historical role of environmental drivers in the process of urban abandonment, while the second one is to contribute to the typology of environmentally related processes of urban abandonment in order to better identify future calamities. With respect to the former, the findings reveal that the relation between environmental hazards and urban abandonment is pertinent in regions with specific geographic conditions and pertains only to certain categories of urban settlements. With respect to the latter, by drawing on these findings, we propose some alterations and amendments to McLeman’s comprehensive model of settlement abandonment in the context of global environmental change.
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8.
  • Baresel, Christian, et al. (författare)
  • Uncertainty-Accounting Environmental Policy and Management of Water Systems
  • 2007
  • Ingår i: Environmental Science & Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 41:10, s. 3653–3659-
  • Tidskriftsartikel (refereegranskat)abstract
    • Environmental policies for water quality and ecosystemmanagement do not commonly require explicit stochasticaccounts of uncertainty and risk associated with thequantification and prediction of waterborne pollutant loadsand abatement effects. In this study, we formulate andinvestigate a possible environmental policy that does requirean explicit stochastic uncertainty account. We compareboth the environmental and economic resource allocationperformance of such an uncertainty-accounting environmentalpolicy with that of deterministic, risk-prone and riskaverseenvironmental policies under a range of differenthypothetical, yet still possible, scenarios. The comparisonindicates that a stochastic uncertainty-accountingpolicy may perform better than deterministic policies overa range of different scenarios. Even in the absence ofreliable site-specific data, reported literature values appearto be useful for such a stochastic account of uncertainty.
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9.
  • Blennow, Kristina (författare)
  • Simulating wind disturbance impacts on forest landscapes: Tree-level heterogeneity matters
  • 2014
  • Ingår i: Environmental Modelling and Software. - : Elsevier BV. - 1364-8152 .- 1873-6726. ; 51, s. 1-11
  • Tidskriftsartikel (refereegranskat)abstract
    • Wind is the most detrimental disturbance agent in Europe's forest ecosystems. In recent years, disturbance frequency and severity have been increasing at continental scale, a trend that is expected to continue under future anthropogenic climate change. Disturbance management is thus increasingly important for sustainable stewardship of forests, and requires tools to evaluate the effects of management alternatives and climatic changes on disturbance risk and ecosystem services. We here present a process-based model of wind disturbance impacts on forest ecosystems, integrated into the dynamic landscape simulation model iLand. The model operates at the level of individual trees and simulates wind disturbance events iteratively, i.e., dynamically accounting for changes in forest structure and newly created edges during the course of a storm. Both upwind gap size and local shelter from neighboring trees are considered in this regard, and critical wind speeds for uprooting and stem breakage are distinguished. The simulated disturbance size, pattern, and severity are thus emergent properties of the model. We evaluated the new simulation tool against satellite-derived data on the impact of the storm Gudrun (January 2005) on a 1391 ha forest landscape in south central Sweden. Both the overall damage percentage (observation: 21.7%, simulation: 21.4%) as well as the comparison of spatial damage patterns showed good correspondence between observations and predictions (prediction accuracy: 60.4%) if the full satellite-derived structural and spatial heterogeneity of the landscape was taken into account. Neglecting within-stand heterogeneity in forest conditions, i.e., the state-of-the-art in many stand-level risk models, resulted in a considerable underestimation of simulated damage, supporting the notion that tree-level complexity matters for assessing and modeling large-scale disturbances. A sensitivity analysis further showed that changes in wind speed and soil freezing could have potentially large impacts on disturbed area and patch size. The model presented here is available as open source. It can be used to study the effects of different silvicultural systems and future climates on wind risk, as well as to quantify the impacts of wind disturbance on ecosystem services such as carbon sequestration. It thus contributes to improving our capacity to address changing disturbance regimes in ecosystem management. (C) 2013 Elsevier Ltd. All rights reserved.
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10.
  • Brandt, S. Anders, 1970-, et al. (författare)
  • Kartografiska Sällskapets utbildningssektion : ett nytt tillskott i KS-familjen
  • 2006
  • Ingår i: Kart- & bildteknik. - Gävle : Kartografiska sällskapet. - 1651-792X. ; 21:2, s. 10-11
  • Tidskriftsartikel (populärvet., debatt m.m.)abstract
    • På Kartografiska Sällskapets årsmöte i Jönköping den 21 mars beslutades att inrätta en ny sektion inom sällskapet – en utbildningssektion. Denna artikel beskriver bakgrunden till sektionen och dess verksamhetsidé. Utbildningssektionens embryo tillkom för tre år sedan efter förslag från ULI som delegerade uppgiften till Geomatikprogrammet vid Högskolan i Gävle. Tanken vara att skapa ett forum för lärare inom geomatikområdet. Både för att sammanföra lärare från olika lärosäten, för att öka förståelsen för varandras arbeten, och för att kunna förbättra möjligheterna till samarbete.
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11.
  • Lilja, Sven, 1947- (författare)
  • Teoretisk epilog
  • 2008
  • Ingår i: Leva vid Östersjöns kust. - Huddinge : Södertörns högskola. - 9789189315952 ; , s. 265-276
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • Arftikeln är en teoretiskt orienterad sammanfatande analys av publikationens bidrag. Den anknyter till projektets övergriande målsättningar, och strävar efter att sätta antologins hvuudresultat i det större projektsammanhanget.
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12.
  • Lilja, Sven, 1947- (författare)
  • Appendix - Projektbeskrivning : förmoderna kustmiljöer. Naturresurser, klimat och samhälle vid östersjökusten före 1800 - ett miljöhistoriskt projekt
  • 2006
  • Ingår i: Människan anpassaren - människan överskridaren. - Huddinge : Södertörns högskola. - 9789189315617 - 9189315618 ; , s. 231-241
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • Projektet Förmoderna kustmiljöer. Natur, klimat och samhälle vid Östersjökusten före ca 1800 är en komparativ miljöhistorisk studie av lokalt resursutnyttjande och miljöpåverkan under förmodern tid (järnålder till tidigt 1800-tal). Projektets övergripande tema ”människoskapade miljöförändringarkontra naturprocesser” undersöks genom intensivstudier av några lokalakustsamhällens elasticitet och överlevnadsförmåga. Såväl långsiktiga somkortsiktiga förändringar studeras. Hur anpassade sig sådana samhällen tilllångsamma naturprocesser, och vilka strategier valdes för att hantera kortarehistoriska fluktuationer och förändringsförlopp? Vilka konsekvenser fick devalda anpassningsstrategierna för närmiljön? Projektet syftar till ett disciplinöverskridande samarbete mellan arkeologi, historia och geografi. Delprojekten behandlar kompletterande perspektiv, där yttre naturförhållanden(landhöjning, klimatförändringar och växlingar i den marinbiologiska faunanetc.), samt yttre samhällsförhållanden (närhet till stat och marknad) ställsmot lokalsamhällets inre anpassnings- och förändringsstrategier. Undersökningen är komparativ, med undersökningsområden i lokala kust- och skärgårdsmiljöer vid Östersjön. I första hand kommer Stockholms södra skärgård och Estlands kust, med Saaremaa (Ösel) och Hiumaa (Dagö), att studeras, men även områden i Finland och västra Ryssland.
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13.
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14.
  • Andersson-Sköld, Yvonne, et al. (författare)
  • An integrated method for assessing climate-related risks and adaptation alternatives in urban areas
  • 2015
  • Ingår i: Climate Risk Management. - : Elsevier BV. - 2212-0963. ; 7, s. 31-50
  • Tidskriftsartikel (refereegranskat)abstract
    • © 2015 The Authors. The urban environment is a complex structure with interlinked social, ecological and technical structures. Global warming is expected to have a broad variety of impacts, which will add to the complexity. Climate changes will force adaptation, to reduce climate-related risks. Adaptation measures can address one aspect at the time, or aim for a holistic approach to avoid maladaptation. This paper presents a systematic, integrated approach for assessing alternatives for reducing the risks of heat waves, flooding and air pollution in urban settings, with the aim of reducing the risk of maladaptation. The study includes strategies covering different spatial scales, and both the current climate situation and the climate predicted under climate change scenarios. The adaptation strategies investigated included increasing vegetation; selecting density, height and colour of buildings; and retreat or resist (defend) against sea-level rise. Their effectiveness was assessed with regard to not only flooding, heat stress and air quality but also with regard to resource use, emissions to air (incl. GHG), soil and water, and people's perceptions and vulnerability. The effectiveness of the strategies were ranked on a common scale (from -3 to 3) in an integrated assessment. Integrated assessments are recommended, as they help identify the most sustainable solutions, but to reduce the risk of maladaptation they require experts from a variety of disciplines. The most generally applicable recommendation, derived from the integrated assessment here, taking into account both expertise from different municipal departments, literature surveys, life cycle assessments and publics perceptions, is to increase the urban greenery, as it contributes to several positive aspects such as heat stress mitigation, air quality improvement, effective storm-water and flood-risk management, and it has several positive social impacts. The most favourable alternative was compact, mid-rise, light coloured building design with large parks/green areas and trees near buildings.
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15.
  • Petersson, Jesper, 1974 (författare)
  • Blurring the shoreline: De- and re-infrastructuring and the changing colors of European flood policy
  • 2021
  • Ingår i: Environment and Planning E: Nature and Space. - : SAGE Publications. - 2514-8494 .- 2514-8494 .- 2514-8486. ; 4:2, s. 623-644
  • Tidskriftsartikel (refereegranskat)abstract
    • This paper provides a genealogy of the emergence of a common EU flood policy, including the scope and direction of this policy. Noticing how EU policy proposes green infrastructure (associated with using nature as a buffer zone in managing floods) as an alternative to grey infrastructure (implying fixed installations of concrete and cement), this paper adopts the theoretical lens of the so-called infrastructural turn, which advocates a relational investigation of infrastructure. By engaging this approach, the paper shows how flood infrastructure can contain very different compositions of (unruly) water and (settled) land. A narrative of a historically strong focus on guarding society from the powerful forces of nature through a fixed line of defense is increasingly giving way to more muddy states—quite literally—where society is expected to learn to live with flooding and show ecological consideration. To capture the EU’s, and especially the European Commission’s efforts to establish a pan-European flood infrastructure that accommodates this turn, the concepts of de- and re-infrastructuring are developed. These concepts act as heuristic devices to capture how policy performs some combinations between water and land as constituting an attractive and functional flood infrastructure, but constitutes other infrastructural relations of the aquatic and the terrestrial as undesirable and, hence, as malfunctioning. This performative act of distinguishing between what constitutes “good and proper” versus “bad and undesirable” infrastructure is referred to as a politics of infrastructure.
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16.
  • Aldenhoff, Wiebke, 1985, et al. (författare)
  • Comparison of ice/water classification in Fram Strait from C- and L-band SAR imagery
  • 2018
  • Ingår i: Annals of Glaciology. - : Cambridge University Press (CUP). - 0260-3055 .- 1727-5644. ; 59:76pt2, s. 112-123
  • Tidskriftsartikel (refereegranskat)abstract
    • In this paper an algorithm for ice/water classification of C- and L-band dual polarization synthetic aperture radar data is presented. A comparison of the two different frequencies is made in order to investigate the potential to improve classification results with multi-frequency data. The algorithm is based on backscatter intensities in co- and cross-polarization and autocorrelation as a texture feature. The mapping between image features and ice/water classification is made with a neural network. Accurate ice/water maps for both frequencies are produced by the algorithm and the results of two frequencies generally agree very well. Differences are found in the marginal ice zone, where the time difference between acquisitions causes motion of the ice pack. C-band reliably reproduces the outline of the ice edge, while L-band has its strengths for thin ice/calm water areas within the icepack. The classification shows good agreement with ice/water maps derived from met.no ice-charts and radiometer data from AMSR-2. Variations are found in the marginal ice zone where the generalization of the ice charts and lower accuracy of ice concentration from radiometer data introduce deviations. Usage of high-resolution dual frequency data could be beneficial for improving ice cover information for navigation and modelling.
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17.
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18.
  • Vestin, Patrik, et al. (författare)
  • Impacts of stump harvesting on carbon dioxide, methane and nitrous oxide fluxes
  • 2022
  • Ingår i: Iforest-Biogeosciences and Forestry. - : Italian Society of Sivilculture and Forest Ecology (SISEF). - 1971-7458. ; 15, s. 148-162
  • Tidskriftsartikel (refereegranskat)abstract
    • During 2010-2013, we investigated the effects of stump harvesting on greenide (N2O) with the flux-gradient technique at four experimental plots in a hemiboreal forest in Sweden. All plots were clear-cut and soil scarified and two of the plots were additionally stump harvested. The two clear-cut plots served as control plots. Due to differences in topography, we had one wetter and one drier plot of each treatment. All plots exhibited substantial emissions of GHGs and we noted significant effects of wetness on CO2, CH4 and N2O fluxes within treatments and significant effects of stump harvesting on CO2 and N2O fluxes at the dry plots. The CO2 emissions were lower at the dry stump harvested plot than at the dry control, but when estimated emissions from the removed stumps were added, total CO2 emissions were higher at the stump harvested plot, indicating a small enhancement of soil respiration. In addition, we noted significant emissions of N2O at this plot. At the wet plots, CO2 emissions were higher at the stump harvested plot, also suggesting a treatment effect but differences in wetness and vegetation cover at these plots make this effect more uncertain. At the wet plots, we noted sustained periods (weeks to months) of net N2O uptake. During the year with simultaneous measurements of the abovementioned GHGs, GHG budgets were 1.224??103 and 1.442??103 gm-2 of CO2-equivalents at the wet and dry stump harvested plots, respectively, and 1.070??103 and 1.696??103 gm-2 of CO2-equivalents at the wet and dry control plots, respectively. CO2 fluxes dominated GHG budgets at all plots but N2O contributed with 17% at the dry stump harvested plot. For the full period 2010-2013, total carbon (CO2+CH4) budgets were 4.301??103 and 4.114??103 g m-2 of CO2-eqvivalents at the wet and dry stump harvest plots, respectively and 4.107??103 and 5.274??103 gm-2 of CO2-equivalents at the wet and dry control plots, respectively. Our results support recent studies suggesting that stump harvesting does not result in substantial increase in CO2 emissions but uncertainties regarding GHG fluxes (especially N2O) remain and more long-term measurements are needed before robust conclusions can be drawn.
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19.
  • Kantor-Pietraga, Iwona, et al. (författare)
  • Environmental hazards as a driver of urban abandonment in Poland
  • 2014
  • Ingår i: Unraveling the logics of landscape. Eds.: Stenseke, M., Dymitrow, M., Saltzman, K. et al.; 26th session of the Permanent European Conference for the Study of the Rural Landscape, 8–12 September, University of Gothenburg, Gothenburg & Mariestad, Sweden. - : University of Gothenburg, Sweden. ; , s. 104-104
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • The modern society is often perceived robust enough to withhold the calamities of adverse natural forces, while the phenomenon of complete settlement abandonment might seem as a thing of the past. However, due to an increased rate of environmental change, the issue of human vulnerability becomes all the more pertinent. In this presentation, we focus on the emergence of rural landscapes as a result of urban abandonment due to environmental hazards, here seen as an element in the functioning of the concept of environmental drivers. The underlying assumption is that a characteristic of environmental hazards is their spatial and temporal constancy of impact, whereby processes and phenomena having taken place in the past have their analogies in the present. In order to generate considerations for future research and policy development, there is a need to pay greater attention to the dangerous relationship between humans and the natural environment, not least by drawing lessons from the past. The presentation clarifies the dynamic interactions of drivers and their progression through various stages of urban abandonment with both an analysis of some general trends and an in-depth examination of three selected case studies from Poland. It has two objectives. The first one is to identify the historical role of environmental drivers in the process of urban abandonment, while the second one is to contribute to the typology of environmentally related processes of urban abandonment in order to better identify future calamities. In the first respect, the findings reveal that the relation between environmental hazards and urban abandonment is pertinent in regions with specific geographic conditions and pertains only to certain categories of urban settlements. In the second respect, by drawing on these findings, we propose some alterations and amendments to McLeman’s comprehensive model of settlement abandonment in the context of global environmental change.
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20.
  • Beier, Ulrika, et al. (författare)
  • Fisk och fiske i Mälaren
  • 2015
  • Rapport (populärvet., debatt m.m.)abstract
    • Nära en tredjedel av Sveriges befolkning bor i Mälardalen. Mälaren är Sveriges tredje största sjö och en av de artrikaste beträffande fisk. Sjön är både flikig och mångsidig. Ömsom kantas den av slätter med intensivt jordbruk och stora vassområden, ömsom av karga klippor och grusstränder. Här finns omväxlande små och stora öar, grunda vikar, trånga sund och stora, djupa fjärdar. Mälaren har förorenats under århundraden och är fortfarande delvis övergödd. Trots det tjänar den som landets största dricksvattentäkt. Två miljoner människor får dricksvatten från Mälaren. Länge har fokus varit på sjöns vattenkvalitet, både för att dricka och bada i. Mälaren är också viktig som fiskesjö. Fiske i Mälaren innebär oftast rekreation men sjön försörjer också cirka trettio yrkesfiskare. Sist men inte minst - fisken i Mälaren är en viktig del i dess ekosystem. Genom näringsväven återkopplar fisken oundvikligen till vattnets kvalitet. I den här rapporten vill vi sätta Mälarens fisk i fokus. Vi ska berätta om fiskarter som är viktiga för ekosystemet och fisket samt om hur fisken i Mälaren undersöks.
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21.
  • Myers-Smith, Isla H., et al. (författare)
  • Complexity revealed in the greening of the Arctic
  • 2020
  • Ingår i: Nature Climate Change. - : Springer Science and Business Media LLC. - 1758-678X .- 1758-6798. ; 10:2, s. 106-117
  • Tidskriftsartikel (refereegranskat)abstract
    • As the Arctic warms, vegetation is responding, and satellite measures indicate widespread greening at high latitudes. This ‘greening of the Arctic’ is among the world’s most important large-scale ecological responses to global climate change. However, a consensus is emerging that the underlying causes and future dynamics of so-called Arctic greening and browning trends are more complex, variable and inherently scale-dependent than previously thought. Here we summarize the complexities of observing and interpreting high-latitude greening to identify priorities for future research. Incorporating satellite and proximal remote sensing with in-situ data, while accounting for uncertainties and scale issues, will advance the study of past, present and future Arctic vegetation change.
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22.
  • Pendrill, Florence, 1983 (författare)
  • Felling Forests from Afar: Quantifying Deforestation Driven by Agricultural Expansion and International Trade
  • 2019
  • Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Deforestation is a major source of human-caused greenhouse gas emissions and the largest threat to terrestrial biodiversity. Most forest loss is due to the expansion of agricultural land use increasingly driven by international demand for food, fuel and fibre. However, there is still limited understanding of the extent to which different agricultural commodities are contributing to deforestation. It has therefore also been difficult to evaluate the role of international trade in driving deforestation. This dissertation aims at quantifying the agricultural drivers of tropical deforestation (Papers I and II) and the associated carbon emissions (Paper III). It further assesses the role of international trade, by following the agricultural commodities with embodied deforestation through international supply chains using trade models (Papers II and III). The results show that a few commodity types, primarily cattle meat and oilseed products, account for a large part of tropical deforestation. Much (26–39%) of the embodied deforestation and concomitant emissions were found to be associated with international demand (from products and services). Looking closer at the countries that import embodied deforestation, Paper II finds that many countries that are increasing their forest cover at home, import products associated with deforestation elsewhere, thereby offsetting about a third of their forest gains. Paper III finds that imports of embodied deforestation emissions for many developed countries are similar in size to their national agricultural emissions amounting, e.g., for the EU, to around 15% of the carbon footprint of an average diet. Put together, the results add to the evidence that combating deforestation can benefit from complementing domestic policies with measures that target international demand. The results also indicate that tackling deforestation and its associated impacts at the global level is probably even more challenging than at the national level, although international trade can also provide efficiency gains by optimising land use globally.
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23.
  • Glimskär, Anders, et al. (författare)
  • Land Type Categories as a Complement to Land Use and Land Cover Attributes in Landscape Mapping and Monitoring
  • 2015
  • Ingår i: Land Use and Land Cover Semantics. - Boca Raton : CRC Press. - 9781482237399 ; , s. 171-190
  • Bokkapitel (refereegranskat)abstract
    • The purpose of land cover and land use descriptions varies, and this influences how these concepts are perceived in different contexts. The increasing need for spatial data for multipurpose monitoring and modeling also increases the demands for compatibility, repeatability, detail, and well-documented criteria. We suggest that threshold values along a continuous scale can be used to create nominal classes for a common conceptual framework. However, the exact values of these thresholds need to be based on well-defined functional and systematic criteria. Ecological and environmental gradients are often mosaic and complex, and several types of land use may coexist at the same site. In reality, land use can be seen as a “shifting cloud” of activities varying in both time and space. We advocate the use of strict definitions of land cover as physical structures and land use as human activities, which raises the need for a complementary concept, which we call “land type,” with stable threshold values based on mutually exclusive functional criteria. Such functional criteria often put clear limits to what spatial resolution is appropriate, since the suitability for a certain purpose (e.g., agriculture or forestry) is determined by the user of the land, rather than by the independent observer. Our example of land type categories comprises a two-level hierarchical classification with seven main types and altogether 28 subtypes. As an example, we discuss the overlapping Swedish definitions of forest and arable land. The criteria that define our main land types are less dependent on how the area is managed at a specific moment in time, and they are therefore less sensitive to short-term variation. The land types define the limits for what land cover and land use can be expected at a certain site, given, for example, ground conditions, water, or artificial structures. Since such land types need to incorporate functional and qualitative understanding and interpretation, human visual interpretation is needed, whereas automated remote sensing methods are suitable mainly for the structural aspects of land cover.
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24.
  • Englund, Oskar, 1982 (författare)
  • On Sustainability of Biomass for Energy and the Governance Thereof
  • 2016
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Due to concerns about climate change, energy security, and resource scarcity, non- renewable resources are increasingly being displaced by biomass. As with most human activities, the production of biobased products can be associated with negative impacts. Primarily, this relates to the biomass supply systems, i.e., agriculture and forestry, which currently are major causes of biodiversity loss and degradation of ecosystem services. Developing sustainable production systems when transitioning from non-renewable resources to biomass is imperative. This thesis aims to clarify the meaning of sustainability in the context of biomass for bioenergy, and contribute to our understanding of how different forms of governance can promote sustainably sourced biomass for bioenergy. The thesis is based on five appended papers: Paper I analyses to what extent, where, and under what conditions oil palm for biodiesel in Brazil can be produced profitably, and what risks and opportunities that can be associated with introducing large-scale oil palm production in Brazil. Paper II lays the foundation for understanding how new biomass production can be introduced into landscapes while supporting rather than compromising the ability of the landscape to supply other ecosystem services. Paper III describes different forms of governance and shows how these can play different roles in promoting sustainable bioenergy in different countries. Paper IV focuses on how short rotation coppice production systems are affected by EU policy and how different governance forms can assist in adapting production systems to conform to the corresponding sustainability requirements. Finally, Paper V assesses how sustainability certification (private governance) addresses biodiversity conservation and contributes to our understanding of possible improvements.
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25.
  • Lilja, Sven, 1947- (författare)
  • Teoretisk epilog
  • 2006
  • Ingår i: Människan anpassaren - människan överskridaren. - Huddinge : Södertörns högskola. - 9789189315617 - 9189315618 ; , s. 197-220
  • Bokkapitel (populärvet., debatt m.m.)
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26.
  • Blennow, Kristina (författare)
  • Evaluating the Local Climate Impacts Profile tool for assessing local impacts of extreme weather events
  • 2014
  • Ingår i: Journal of Geography and Natural Disasters. - : OMICS Publishing Group. - 2167-0587. ; 4
  • Tidskriftsartikel (refereegranskat)abstract
    • The climate change adaptation tool Local Climate Impacts Profile (LCLIP), developed and previously widely usedin the UK, was systematically evaluated in terms of its transferability to Sweden and its usefulness as a catalyst forawareness-raising and action with respect to climate change adaptation. The tool includes scoping, media trawl,interviews and reporting and was applied in three Swedish municipalities. It was found that after some adjustment,the tool can be applied successfully under Swedish conditions. The municipalities involved found the results useful forstimulating local adaptation work. However, the municipalities concluded that LCLIP is primarily a beginner's tool thatcan be applied at a low cost and that other, more costly investigations on vulnerability to extreme weather typically needto be conducted for successful adaptation to climate change at municipal level. An advantage of the LCLIP tool is thatit involves civil servants from all departments in the municipality and thus the resulting vulnerability discussions alsoinvolve departments dealing with ‘soft' issues, such as administration and care.
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27.
  • Lilja, Sven, 1947- (författare)
  • Klimatet, döden och makten : 1690-talets klimatkris
  • 2008
  • Ingår i: Leva vid Östersjöns kust. - Huddinge : Södertörns högskola. - 9789189315952 ; , s. 23-79
  • Bokkapitel (populärvet., debatt m.m.)abstract
    • Artikeln beskriver och analyserar den stora klimatkris som drabbade norra Sverige, Finland och Baltikum på 1690-talet. Den studerar de demografiska och ekonomiska aspekterna av krisen, med särskild hänsyn till mortalitet, skördeutfall och och klimat- och vädersituationen. Artikeln diskutera även kronans sätt att reagera på krissignalerna från agrarsamhället.
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28.
  • Lilja, Sven, 1947- (författare)
  • Pre-modern coastal environments - project description
  • 2008
  • Ingår i: Leva vid Östersjöns kust. - Huddinge : Södertörns högskola. - 9789189315952 ; , s. 319-329
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • The project Pre-Modern Coastal Environments has as its objective the studyof local resource use in selected coastal regions along the Baltic Sea. Thestudy’s main purpose is to determine the correlation between the effects ofhuman activities on the environment and the effects of naturally occurringenvironmental change. This will be achieved by using case studies focussingon the elasticity and survival capacity of specific coastal societies in easternSweden and western Estonia. The project will study settlement patterns,trade and industry, in relation to changes in the physical environment in thecontext of offshore displacement, climate changes, and changes in marinebiota. The project is a multidisciplinary cooperative effort of six researcherswho represent the disciplines of history, archaeology, human geography andphysical geography.
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29.
  • Dymitrow, Mirek, et al. (författare)
  • Geography’s three problems seen through the prism of one educational challenge
  • 2022
  • Ingår i: Multiple Nordic Geographies. - Joensuu, Finland : University of Eastern Finland. - 9789526145853 ; , s. 134-134
  • Konferensbidrag (refereegranskat)abstract
    • As the modern society becomes larger and increasingly diverse, its problems become more elusive and solutions far-fetched. This puts pressure on relevant education. Geographical knowledge, whose raison d’être has always been to deal with complexity, should therefore be in high demand, but isn’t. In this presentation we want to investigate why this is the case, by outlining three major problems geography education faces today and what potential solutions there might be. #1) Geography as a societal need: Geography’s traditional status as a synthesizing science is not well translated to the “sustainability mindset” that currently saturates educational curricula. This leads to decreasing numbers of geography students who seek out explicitly “sustainability-oriented” courses, which are often taught by teachers without a solid synthesizing background. Simultaneously, geography’s potential is reduced at pre-university levels where it is still associated with a stereotype (mostly cartography and ‘pub quiz’ knowledge). #2) Geography as an identity: Being “a specialist on being a generalist” is a frustrating motto for many geography students, who are inculcated that expertise is usually vertical. Inability to capitalize on horizontal expertise causes a personal crisis that impedes learning and embracing geography as a professional identity. #3 Geography as a competence: Being a holistic “for real” cannot be reduced to knowing a multitude of facts but requires foremost an understanding of how differences in opinion (underlying diametrically different sustainability strategies and solutions) arise. This requires a broad epistemological base. However, philosophy of science is not taught at pre-graduate level, while new students are becoming increasingly opinionated on contested topics. Departing from teaching experience at 4 Nordic universities, we suggest adding a “sensitizing phase” to the most critical stages of geography’s first-year education. A sensitizing phase is a targeted and deepened/extended course introduction, designed to a) focus on the strengths of geography and its boundaries to other realms of knowledge; b) providing continuous moral support to students to instill geography’s identity; c) teaching techniques how to handle complexity (knowledge reduction, extrapolation, epistemological breadth). We conclude that this approach allays confusion, primes the students towards the relevance of geography knowledge, and inculcates them into a spirit of life-long learning.
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30.
  • Buckland, Philip I., 1973- (författare)
  • SEAD - The Strategic Environmental Archaeology Database Inter-linking Multiproxy Environmental Data with Archaeological Investigations and Ecology
  • 2013
  • Ingår i: Archaeology in the Digital Era. - : Amsterdam University Press. - 9789089646637 - 9789048519590 - 9789048519606 ; , s. 320-331
  • Konferensbidrag (refereegranskat)abstract
    • The volume of data on past environmental and climate changes, as well as human interactions with these, has long since passed the level where it is manageable outside of large scale database systems. The Strategic Environmental Archaeology Database project aims to not only store and disseminate such data, but also provide tools for querying and analysing them, whilst maintaining a close connection with the archaeological and ecological data that are essential for their comprehensive interpretation. Large scale, geographically and chronologically unrestricted databases provide us with essentially unlimited scope for putting individual sites into a broader context and applying locally collated data to the investigation of earth system level changes. By providing integrated access to data from a variety of proxies, including plant macrofossils, pollen, insects and geochemistry, along with dating evidence, more complex questions can be answered where any single proxy would not be able to provide comprehensive answers.
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31.
  • Happonen, Maija, et al. (författare)
  • Aviation's climate impact allocated to inbound tourism: decision-making insights for "climate-ambitious" destinations
  • 2023
  • Ingår i: Journal of Sustainable Tourism. - : Informa UK Limited. - 1747-7646 .- 0966-9582. ; 31:8, s. 1885-1901
  • Tidskriftsartikel (refereegranskat)abstract
    • The climate impact from international aviation was 2.4% of the world's total climate impact in 2018, and is expected to grow. International regulation of this impact is not aligned with trajectories to stay below 1.5 degrees C of global warming. Conventional approaches to allocating climate impact to international aviation also lack one of the important drivers for air travel: tourism. Existing studies have focused on the carbon footprint of residents' outbound air travel, but there is a lack of focus on the climate impact from inbound air travel. This article quantifies the climate impact of inbound air travel, and presents it alongside the impact of outbound air travel, to get a full picture of the climate impact of tourism-driven air travel and provide insights for tourism's decision-makers. This was done in a case study for Sweden. The results show that the emissions from inbound air travel have grown 3 times more than emissions from outbound air travel each year, at a faster rate than the yearly growth for all international air travel. Responsibility for the climate impacts of inbound and outbound air travel is discussed, along with further actions such as demarketing and focusing on closer source markets.
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32.
  • Brandt, S. Anders, 1970-, et al. (författare)
  • 3D geovisualization as a communication and analysis tool in fluvial geomorphology
  • 2004
  • Ingår i: Geoinformatics 2004. - Gävle : Gävle University Press. - 919749481X ; , s. 339-346
  • Konferensbidrag (refereegranskat)abstract
    • The fields of hydrology and fluvial geomorphology get more and more attention in the general public. The reason for this is changed climate patterns with increased frequencies of storms and river flooding and as a result changed geomorphology and living conditions for the inhabitants of the area. With the development of 3D geovisualization, hydrological and geomorphological processes can be better simulated and visualized. Thus not only the domain specialists, but also the general public can appreciate very complex hydrological processes and resulting geomorphology. This is of great value since a high frequency of storms and flooding has been a big issue for politicians, planners, and the general public. It is in this sense that 3D geovisualization can be an important tool for analysis and communication. Complex hydrological and geomorphological processes can be effectively simulated and analyzed by the domain specialists while efficient and effective visualization provides a common platform for communication among domain specialists and the general public. This paper will discuss and illustrate these issues using a case study of geomorphology along the Reventazón River, downstream from the Cachí Reservoir in Costa Rica, due to the release of extreme amounts of sediment during flushing of the reservoir.
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33.
  • Brandt, S. Anders, 1970- (författare)
  • Conceptualization of hydraulic and sedimentary processes in downstream reaches during flushing of reservoirs
  • 2005
  • Ingår i: Proceedings of the XXXI IAHR Congress [Elektronisk resurs]. - Seoul : Korea Water Resources Association. - 8987898237 ; , s. 2577-2588
  • Konferensbidrag (refereegranskat)abstract
    • The main focus of this paper is to describe the active hydraulic and sedimentary processes in downstream river reaches during flushing of sediments from reservoirs. During flushing extreme amounts of sediment may be released. Therefore, these processes are different than those downstream from dams and reservoirs not subjected to flushing. Hence, also the effects differ, which knowledge of may be of value for biologists, etc. During flushing of a reservoir a wave will be released to the downstream reaches. This wave can be divided into one water part and one sediment part. Initially they are in phase with each other, but with increased distance downstream from the dam, the transported sediment lags behind the water due to different traveling velocities. The paper treats when and where sedimentation occurs, and how this is related to the different traveling velocities of water and sediment. Also included are discussions on how the downstream effects during flushing differ from non-flushing effects, how visualization of effects can enhance both the analysis and communication with planners, politicians, etc., as well as discussions on how the studies of these effects can benefit from improved field-work methods.
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34.
  • Pendrill, Florence, 1983 (författare)
  • Where have all the forests gone? Quantifying pantropical deforestation drivers
  • 2022
  • Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
    • Deforestation across the tropics continues to be a major source of greenhouse gas emissions and the largest threat to biodiversity on land. With strengthened commitments to reduce deforestation from countries and companies alike, it is crucial that renewed investments for reducing deforestation be guided by a sound understanding of what drives deforestation. This thesis gives a comprehensive picture of the amount of deforestation and concomitant carbon emissions driven by the expansion of agricultural commodities across the tropics and its link to international trade. The included papers show that pasture and a handful of crops drive a large share of the deforestation resulting in the expansion of productive agriculture. The main demand for these commodities is domestic consumption; even so, imports of food commodities associated with deforestation can still constitute a large part of the consumer countries’ carbon emissions due to consumption (e.g., in the EU). This thesis contributes empirical evidence relating to forest transition theories by showing that many countries with increasing forest cover tend to import products associated with deforestation elsewhere, thereby offsetting around one-third of their forest gains. The thesis also introduces a conceptual distinction between two categories of agriculture-driven deforestation, based on whether it results in productive agricultural land or not. Though almost all deforestation is agriculture-driven, one-third to one-half of agriculture-driven deforestation occurs without the expansion of productive agricultural land. Instead, it may be due to several potential mechanisms, such as land speculation, tenure issues, or fires. Put together, these results indicate that it is crucial that policies to curb deforestation go beyond focusing only on trade in specific commodities, to help foster concerted action on rural development, territorial governance, and land-use planning. This thesis also highlights key evidence gaps on the links between deforestation and agriculture: (i) the attribution of deforestation to specific commodities currently often relies on coarse or outdated data, (ii) there is a need for improved data on deforestation trends, and (iii) our understanding of deforestation drivers is systematically poorer for dry forests and Africa.
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35.
  • Brandt, S. Anders, 1970-, et al. (författare)
  • Harmonization of GI educations in Sweden and the Bologna process : viewpoints of University of Gävle
  • 2006
  • Ingår i: Fifth European GIS Education Seminar (EUGISES 2006). ; , s. 10-
  • Konferensbidrag (refereegranskat)abstract
    • With the implementation of the Bologna declaration, many study programmes and course curricula needs to be updated and revised. This paper describes the current situation in Sweden regarding GIT educations and courses and whether a harmonization is needed. A survey was made to see which GIT courses that are given and at which level they are given at the various universities. For some universities, interviews were conducted about their courses’ contents and their strategies for determining course levels. Discussions were also made about harmonization of courses between Swedish universities. Some problems due to lack of harmonization was noted, which probably will be more severe in the future due to increased student mobility. To harmonize courses, Bloom’s revised taxonomy is put forward as a tool which is used to clearly state the level of the course in relation to learning objectives.
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36.
  • Brandt, S. Anders, 1970-, et al. (författare)
  • A harmonized GIS course curriculum for Swedish universities
  • 2007
  • Ingår i: EUC'07 HERODOT Proceedings. ; , s. 10 s.-
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • With the implementation of the Bologna declaration, European and other universities must change or adjust courses and programmes so they fit into the Bologna model. In Sweden this will take place during 2007. The intention with the declaration, for example, is that a basic course in one subject at one university should be treated as equivalent to the same type of course at another university. Once a year, the recently formed section for education of the Swedish Cartographic Society gathers university lecturers and others for an education conference to discuss matters concerning higher education in geomatics, geoinformatics, geography, etc. Last year’s conference identified the need for a harmonized course curriculum in basic GIS. One of the advantages of such a course is easier transfer of study records for inclusion of course credits in study programmes at other universities. Therefore, an attempt has been made to write a harmonized course curriculum for basic GIS. The course will contain about 50% common content and about 50% of content decided by the individual university. The common content will be described as learning outcomes, and then it is up to the universities to place the learning outcomes into a context. Thanks to this common core, the course can be given for such diverse programmes as archaeology, land surveying, or economy, and still be able to include the required knowledge for students to continue on more advanced courses at other universities.
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37.
  • Olsson, Mikael, 1948 (författare)
  • Polaris : Möten med världens poler www.polarisen.se
  • 2009
  • Ingår i: http://www.polarisen.se. - Göteborg : University of Gothenburg.
  • Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
    • Polaris is a Swedish based web site dealing with Antarctic, Arctic and sub-polar areas around the globe, including sub-Arctic regions of Scandinavia and Eurasia. Polaris is focusing on peoples and places, research and resources on high latitudes. In particular, the site's ambition is to depict the interaction between the components and put them in a context of global environmental and climate change. The web site also addresses the Swedish polar and mountain research, exemplified by the depiction of a number of Swedish polar researchers' work and choice of career. Polaris main target group is high school students. We aim at establishing Polaris as the popular web site in Sweden for polar research. Polaris was a joint production by Gothenburg and Stockholm Universities and others during the International Polar Year 2007-09. The initiative to the website was taken by the Swedish Committee for International Polar Year, the Swedish Research Council and the Universeum Science Center in Gothenburg. There are many scientific contributors, mainly from the Centre of Earth Systems Science at the University of Gothenburg, the Tarfala Research Station at Stockholm University and the Swedish Polar Research Secretariat . Interviews and articles are made by professional science writers. All texts are in Swedish.
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38.
  • Barthel, Stephan, 1968-, et al. (författare)
  • Bio-cultural refugia : Safeguarding diversity of practices for food security and biodiversity
  • 2013
  • Ingår i: Global Environmental Change. - : Elsevier BV. - 0959-3780 .- 1872-9495. ; 23:5, s. 1142-1152
  • Tidskriftsartikel (refereegranskat)abstract
    • Food security for a growing world population is high on the list of grand sustainability challenges, as is reducing the pace of biodiversity loss in landscapes of food production. Here we shed new insights on areas that harbor place specific social memories related to food security and stewardship of biodiversity. We call them bio-cultural refugia. Our goals are to illuminate how bio-cultural refugia store, revive and transmit memory of agricultural biodiversity and ecosystem services, and how such social memories are carried forward between people and across cohorts. We discuss the functions of such refugia for addressing the twin goals of food security and biodiversity conservation in landscapes of food production. The methodological approach is first of its kind in combining the discourses on food security, social memory and biodiversity management. We find that the rich biodiversity of many regionally distinct cultural landscapes has been maintained through a mosaic of management practices that have co-evolved in relation to local environmental fluctuations, and that such practices are carried forward by both biophysical and social features in bio-cultural refugia including; genotypes, artifacts, written accounts, as well as embodied rituals, art, oral traditions and self-organized systems of rules. Combined these structure a diverse portfolio of practices that result in genetic reservoirs—source areas—for the wide array of species, which in interplay produce vital ecosystem services, needed for future food security related to environmental uncertainties, volatile financial markets and large scale conflicts. In Europe, processes related to the large-scale industrialization of agriculture threaten such bio-cultural refugia. The paper highlights that the dual goals to reduce pressures from modern agriculture on biodiversity, while maintaining food security, entails more extensive collaboration with farmers oriented toward ecologically sound practices.
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39.
  • Vitalis Pemunta, Ngambouk, 1973, et al. (författare)
  • Modern State Law: Regulating Tradition or Protecting the Environment in the Mankon Kingdom of Northwest Cameroon?
  • 2019
  • Ingår i: Endemic Species. Eusebio Cano Carmona (red.). - London, United Kingdom : Intechopen. - 9781839623547
  • Bokkapitel (refereegranskat)abstract
    • Most African countries including Cameroon find themselves in a situation of legal pluralism and at crossroads with implications for the sustainable management of natural resources. Traditional institutions and knowledge systems have been hailed as invaluable mechanisms for the conservation of flora and fauna. This chapter examines the conflict between traditional institutions and State law in the hierarchically stratified Mankon Kingdom of the Grassfield region of Northwest Cameroon where the latter prohibits the harvesting of culturally valuable plant and animal species for myriad ritual ceremonies and for therapeutic purposes. It demonstrates that the lack of cultural sensitivity can be antithetical to conservation initiatives. In other words, there is the need to align current legislative regulations for the management of natural species with the traditional use of territory, gender roles as well as to raise the cultural and educational level of the population through sensitization on the need to conserve the natural environment on which their culture depends for its survival.
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40.
  • Degraded and restituted towns in Poland: Origins, development, problems : Miasta zdegradowane i restytuowane w Polsce. Geneza, rozwój, problemy
  • 2015
  • Samlingsverk (redaktörskap) (övrigt vetenskapligt/konstnärligt)abstract
    • One of the less known problems in settlement geography is the issue of so-called degraded and restituted towns. This lack of reconnaissance, however, is perhaps less the result of the towns’ scarcity than their specificity of being ‘awarded’ or ‘deprived of’ an urban label by means of strictly socio-political actions. Degraded and restituted towns, hence, are spatial units made ‘urban’ or ‘rural’ instantaneously, irrespective of their de facto state along what is widely considered a gradual path of (de)urbanization. Instead, they become compartmentalized into two constructed spatial categories that have survived the onslaught of material transformations and philosophical repositioning through different whims of time. While ‘rural’ and ‘urban’ are conceptual binaries that certainly need to be treated with caution, their cultural salience may cause tangible consequences within national administrative systems that abide by a formalized rural-urban distinction. This issue becomes particularly important for settlements that clearly transcend any imagined rural-urban divide, i.e. those, whose material and immaterial characteristics seem counterfactual to their assigned category. It is also crucial in formal practices designed to avert such counterfactualities, but whose ran-domness of approach more creates confusion than helps straighten out a historical concoction. Both processes, nonetheless, lend ‘urbanity’ and ‘rurality’ a resonance of objectivity, justifying their use as guides for a host of developmental endeavors, despite subverting a much more intricate reality. Degraded and restituted towns are direct derivatives of this. Drawing on the above-mentioned irreconcilabilities, the aim of this book is to present and scrutinize degraded and restituted towns through the example of Poland, where these towns occupy a special niche. For one, Poland, due to its chequered and variegated history, is home to a conspicuously large number of degraded (831) and restituted (236) towns; for another, Poland’s relentlessness of formalizing ‘urbanity’ as a category of statistical, political and cultural guidance has a direct bearing on the lives of the towns’ residents. Realizing the intricacy of degraded and restituted towns in the face of commonplace ru-ral-urban ideations, the editors and the 17 contributing Authors of this book have made an effort to capture the towns’ complexity with special foci on their shrouded origins, developmental specificity and incurred problems. Owing to the involvement of researchers from different scientific disciplines and subdisciplines, the undertaken project has helped elucidate the problem from multiple perspectives: spatial, social, demographic, economic, environmental, historical, architectural, cultural, legal and philosophical. Allocated into 17 chapters, not only have the presented interpretations allowed for a first interdisciplinary synthesis on the topic, but they also helped outline some prospective directions for future research. Moreover, collecting materials of such diversity into an amalgamated whole has helped identify specific discourses that enwrap the concept of “urbanity” when seen through its oscillations within formal contexts, and to which degraded and restituted towns serve as expendable game pieces. By combining knowledge arrived at through ontologically and epistemologically different approaches, the incremental contribution of this book as a whole could be summarized in two attainments: a) extending theoretical frameworks used to study degraded and restituted towns in terms of definition, conceptualization and assessing predispositions for future de-velopment on account of their spatial, legal, socio-economic and historical charac-teristics; b) initiating an anticipated discussion on a number of important and current topics re-lated to the practices of degradation and restitution that have not received adequate attention, e.g., the urbanity-vs.-rurality paradox, the changeability of human settlement forms vs. the consequences of rigid spatial categorizations; the role of various actors in shaping the socio-economic reality under the guise of an ossified binary; or identifying spatio-conceptual conflicts as future challenges for local, regional and national policy.
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41.
  • Pilesjö, Petter, et al. (författare)
  • Analys av geografiska data
  • 2020. - 7:1
  • Ingår i: Geografisk informationsbehandling: : teori, metoder och tillämpningar - teori, metoder och tillämpningar. - 9789144131740 ; , s. 215-272
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
    • I detta kapitel i boken Geografisk information Behandling beskrivs och behandlas metoder för hur geografisk data analyseras. Kapitlet omfattar såväl geografisk teori som exempel på tillämpningar. Geografisk informationsbehandling baseras på insamling, lagring, analys och visualisering av geografiska data. Denna indelning utgör också grunden för bokens disposition. Boken är i första hand avsedd för introducerande kurser vid universitet och högskolor men vissa delar är lämpliga även på avancerad nivå. Den är också utmärkt för yrkesverksamma inom GIS som vill öka sina teoretiska kunskaper.Boken innehåller både teoretiska och praktiska delar, där de senare beskriver tillämpningar som exempelvis samhällsplanering, miljöövervakning och kommersiella tjänster. I insamlingsdelen beskrivs hur man anger en position genom att koppla ett koordinatsystem till jordytan. Därefter beskrivs de vanligaste metoderna att samla in geografiska data som satellitbaserade positioneringssystem, flygfotografering, satellitbaserad fjärranalys och laserskanning. Lagringsdelen behandlar hur dessa data lagras i databaser och distribueras via webben. Analysdelen innehåller beskrivningar av de vanligaste analysmetoderna samt kvalitetsfrågor. Resultatet av en geografisk analys visualiseras oftast i form av kartor, vilket är temat för den sista delen av boken.Denna sjunde upplaga har uppdaterats med nya aktuella tillämpningsexempel. Dessa är i denna upplaga beskrivna tillsammans med de teoretiska beskrivningarna för att stärka kopplingen mellan teori och tillämpningar. Dessutom har beskrivningen av webbtillämpningar utökats och utgör nu ett eget kapitel, och även texten om webbvisualiseringar har stärkts i kartografikapitlet. Vidare har det tillkommit beskrivningar av nya mättekniker samt texter om lagring, analys och visualisering av 3D geografiska data.
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42.
  • Kylander, Malin, 1977-, et al. (författare)
  • A novel geochemical approach to paleorecords of dust deposition and effective humidity: 8500 years of peat accumulation at Store Mosse (the "Great Bog") , Sweden )
  • 2013
  • Ingår i: Quaternary Science Reviews. - : Elsevier BV. - 0277-3791 .- 1873-457X. ; 69, s. 69-82
  • Tidskriftsartikel (refereegranskat)abstract
    • Both bog surface wetness and atmospheric dust deposition are intricately linked to changes in the hydrological cycle and pairing these types of records at the same site provides complementary information. Here a peat core from Store Mosse in southern Sweden covering the last 8500 years was used to make a high-resolution paleoclimate reconstruction based on a combination of bog development, colourimetric humification and inorganic geochemistry data. The coupling of Principal Component Analysis with changepoint modelling allowed for precise linking of changes in bog surface wetness and dust deposition records.A long-term trend towards warm (and possibly wet) conditions starts ca 8150 cal yr BP and culminates with the most pronounced conditions from 6900 to 6600 cal yr BP. The most significant arid period at Store Mosse occurred between 6500 and 5600 cal yr BP during which dust deposition was significantly higher. Wetter conditions dominate from 5500 to 4980 cal yr BP as the transition from the Hypsithermal and into the Neoglacial is made. After a shift to drier conditions, humification enters a more stable period that lasts from 4525 until 3200 cal yr BP. It is during this time that the first possible anthropogenic dust signals occur at ca 4200 cal yr BP. From 3200 cal yr BP to present humification generally shows a long-term decline moving towards wetter conditions. The main exceptions are during the transition from the Neoglacial to Roman Warm Period which is registered as a significantly wetter period and two dry periods recorded 2365 to 2155 cal yr BP and 1275–1105 cal yr BP. In general, the observed changes agree well with regional records of effective humidity and temperature. The high temporal resolution of the Store Mosse record reveals that palaeoclimatic change over the last 8500 years in southern Sweden has had a complex and variable structure.
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43.
  • Aldenhoff, Wiebke, 1985, et al. (författare)
  • COMPARISON OF SENTINEL-1 SAR AND SENTINEL-3 ALTIMETRY DATA FOR SEA ICE TYPE DISCRIMINATION
  • 2019
  • Ingår i: IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium. - 9781538691540
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • In this paper near co-incidental Sentinel-1 C-band SAR imagery and Sentinel-3 SRAL Ku-band altimeter data are compared for their capabilities of sea ice type discrimination. Knowledge of sea ice type is important for climate research and safety in Arctic offshore operations. First-year ice is characterised by a low SAR backscatter intensity in both HH and HV polarisation compared to multi-year ice, while the altimeter waveform parameters show high pulse peakiness and peak power compared to multi-year ice. Thus SAR imagery and altimetry can principally discriminate different ice types. The complexity of the backscattered radar signal however impedes a clear separation of the two types for all cases. Cross comparison of the two sensors offers an opportunity of high resolution validation data, which is often lacking for sea ice studies.
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44.
  • Tang, R., et al. (författare)
  • Increasing terrestrial ecosystem carbon release in response to autumn cooling and warming
  • 2022
  • Ingår i: Nature Climate Change. - : Springer Science and Business Media LLC. - 1758-678X .- 1758-6798. ; 12, s. 380-385
  • Tidskriftsartikel (refereegranskat)abstract
    • Despite overall warming, many regions in the Northern Hemisphere have been cooling in autumn. This cooling resulted in an increasing release of net CO2 2004-2018 as primary production decreased more than respiration in cooling and respiration increased more than production in warming areas. Part of the Northern Hemisphere has experienced widespread autumn cooling during the most recent decades despite overall warming, but how this contrasting temperature change has influenced the ecosystem carbon exchange remains unclear. Here, we show that autumn cooling has occurred over about half of the area north of 25 degrees N since 2004, producing a weak cooling trend over the period 2004-2018. Multiple lines of evidence suggest an increasing net CO2 release in autumn during 2004-2018. In cooling areas, the increasing autumn CO2 release is due to the larger decrease of gross primary productivity (GPP) growth than total ecosystem respiration (TER) growth suppressed by cooling. In the warming areas, TER increased more than GPP because the warming and wetting conditions are more favourable for TER growth than GPP increase. Despite the opposite temperature trends, there has been a systematic increase in ecosystem carbon release across the Northern Hemisphere middle and high latitudes.
  •  
45.
  • Peacock, Mike, et al. (författare)
  • Spatial and Seasonal Variations in Dissolved Methane Across a Large Lake
  • 2023
  • Ingår i: Journal of Geophysical Research - Biogeosciences. - : American Geophysical Union (AGU). - 2169-8953 .- 2169-8961. ; 128:8
  • Tidskriftsartikel (refereegranskat)abstract
    • Lakes process large volumes of organic carbon (OC), are important sources of methane (CH4), and contribute to climatic warming. However, there is a lack of data from large lakes >500 km(2), which creates uncertainty in global budgets. In this data article, we present dissolved CH4, OC bioreactivity measurements, water chemistry, and algal biovolumes at 11 stations across Lake Malaren, the third largest (1,074 km(2)) Swedish lake. Total phosphorus concentrations show that during the study period the lake was classed as mesotrophic/eutrophic. Overall mean CH4 concentration from all stations, sampled five times to cover seasonal variation, was 2.51 mu g l(-1) (0.98-5.39 mu g l(-1)). There was no significant seasonal variation although ranges were greatest during summer. Concentrations of CH4 were greatest in shallow waters close to anthropogenic nutrient sources, whilst deeper, central basins had lower concentrations. Methane correlated positively with measures of lake productivity (chlorophyll a, total phosphorus), and negatively to water depth and oxygen concentration, with oxygen emerging as the sole significant driver in a linear mixed effects model. We collated data from other lakes >500 km(2) (n = 21) and found a significant negative relationship between surface area and average CH4 concentration. Large lakes remain an understudied contributor to the global CH4 cycle and future research efforts should aim to quantify the spatial and temporal variation in their diffusive and ebullitive emissions, and associated drivers. Plain Language Summary Lakes contribute to climatic warming, because they emit large amounts of the powerful greenhouse gas methane into the atmosphere. This occurs because lake bottom sediments and lake waters are home to microbes that produce methane, which then travels diffusively in a dissolved form, or as bubbles, through the lake water and into the air. There is large uncertainty about how much methane is released by lakes on a global scale, and more measurements are required to reduce this uncertainty, particularly from very large lakes. In our study, we measured dissolved methane from 11 sampling locations across a very large Swedish lake, and repeated this five times over a year. Levels of methane within the lake were generally low, but they varied over space and time. Higher methane levels occurred in shallower waters near large towns and cities, and were associated with greater concentrations of nutrients such as phosphorus, which act as food for the methane-producing microbes.
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46.
  • Wallenberg, Nils, 1986, et al. (författare)
  • The effects of warm weather on children’s outdoor heat stress and physical activity in a preschool yard in Gothenburg, Sweden
  • 2023
  • Ingår i: International Journal of Biometeorology. - 0020-7128 .- 1432-1254. ; 67:12, s. 1927-40
  • Tidskriftsartikel (refereegranskat)abstract
    • Hot weather conditions can have negative impacts on the thermal comfort and physical activity of vulnerable groups such as children. The aim of this study is to analyze the effects of warm weather on 5-year-old children’s thermal comfort and physical activity in a preschool yard in Gothenburg, Sweden. In situ measurements were conducted for 1–1.5 h in the early afternoon on 8 days in May, June, and August of 2022. The thermal comfort and physical activity was estimated with GPS-tracks, heart rate monitors, and step counts and compared to observed weather conditions. Results show that physical activity decreases under warmer weather conditions, depicted by a decrease in distance moved, step counts, and highest registered pulse. Moreover, on warm days, the children avoid sunlit areas. For 50% or more of the time spent in sunlit areas, the children are exposed to cautious levels of heat. In shaded areas, on the other hand, the children are less exposed, with five out of 8 days having 50% or more of the time at neutral levels. The study demonstrates the importance of access to shaded areas in preschool yards where children can continue their active play while simultaneously maintaining a safe thermal status.
  •  
47.
  • Callaghan, Terry, et al. (författare)
  • Multi-Decadal Changes in Tundra Environments and Ecosystems : Synthesis of the International Polar Year-Back to the Future Project (IPY-BTF)
  • 2011
  • Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 40:6, s. 705-716
  • Tidskriftsartikel (refereegranskat)abstract
    • Understanding the responses of tundra systemsto global change has global implications. Most tundraregions lack sustained environmental monitoring and oneof the only ways to document multi-decadal change is toresample historic research sites. The International PolarYear (IPY) provided a unique opportunity for such researchthrough the Back to the Future (BTF) project (IPY project#512). This article synthesizes the results from 13 paperswithin this Ambio Special Issue. Abiotic changes includeglacial recession in the Altai Mountains, Russia; increasedsnow depth and hardness, permafrost warming, andincreased growing season length in sub-arctic Sweden;drying of ponds in Greenland; increased nutrient availabilityin Alaskan tundra ponds, and warming at mostlocations studied. Biotic changes ranged from relativelyminor plant community change at two sites in Greenland tomoderate change in the Yukon, and to dramatic increasesin shrub and tree density on Herschel Island, and in subarcticSweden. The population of geese tripled at one sitein northeast Greenland where biomass in non-grazed plotsdoubled. A model parameterized using results from a BTFstudy forecasts substantial declines in all snowbeds andincreases in shrub tundra on Niwot Ridge, Colorado overthe next century. In general, results support and provideimproved capacities for validating experimental manipulation,remote sensing, and modeling studies.
  •  
48.
  • Mills, Gina, 1959, et al. (författare)
  • Tropospheric Ozone Assessment Report: Present-day tropospheric ozone distribution and trends relevant to vegetation
  • 2018
  • Ingår i: Elementa-Science of the Anthropocene. - : University of California Press. - 2325-1026. ; 6:1
  • Tidskriftsartikel (refereegranskat)abstract
    • This Tropospheric Ozone Assessment Report (TOAR) on the current state of knowledge of ozone metrics of relevance to vegetation (TOAR-Vegetation) reports on present-day global distribution of ozone at over 3300 vegetated sites and the long-term trends at nearly 1200 sites. TOAR-Vegetation focusses on three metrics over vegetation-relevant time-periods across major world climatic zones: M12, the mean ozone during 08:00-19:59; AOT40, the accumulation of hourly mean ozone values over 40 ppb during daylight hours, and W126 with stronger weighting to higher hourly mean values, accumulated during 08:00-19:59. Although the density of measurement stations is highly variable across regions, in general, the highest ozone values (mean, 2010-14) are in mid-latitudes of the northern hemisphere, including southern USA, the Mediterranean basin, northern India, north, north-west and east China, the Republic of Korea and Japan. The lowest metric values reported are in Australia, New Zealand, southern parts of South America and some northern parts of Europe, Canada and the USA. Regional-scale assessments showed, for example, significantly higher AOT40 and W126 values in East Asia (EAS) than Europe (EUR) in wheat growing areas (p < 0.05), but not in rice growing areas. In NAM, the dominant trend during 1995-2014 was a significant decrease in ozone, whilst in EUR it was no change and in EAS it was a significant increase. TOAR-Vegetation provides recommendations to facilitate a more complete global assessment of ozone impacts on vegetation in the future, including: an increase in monitoring of ozone and collation of field evidence of the damaging effects on vegetation; an investigation of the effects on peri-urban agriculture and in mountain/upland areas; inclusion of additional pollutant, meteorological and inlet height data in the TOAR dataset; where not already in existence, establishing new region-specific thresholds for vegetation damage and an innovative integration of observations and modelling including stomatal uptake of the pollutant.
  •  
49.
  •  
50.
  • Khatami, Sina, et al. (författare)
  • What is drought? The scientific understanding of drought: the primary step towards resolving Iran's water crisis
  • 2015
  • Ingår i: Etemad Daily Newspaper, No. 3193. ; , s. 7-7
  • Tidskriftsartikel (populärvet., debatt m.m.)abstract
    • Abstract in Uncoded languagesIn this article we discuss four basic approaches to characterising droughts namely meteorological, hydrological, agricultural, and socioeconomic. In the first three approaches, drought is defined and measured as a physical phenomenon primarily related to the precipitation shortfall. Socioeconomic drought, nonetheless, is described and determined as the 'supply' and 'demand' in terms of water shortage in different socioeconomic systems. The specific case of Iran’s drought and water crisis is the main focus of this article, and is briefly compared to California’s ongoing drought. In cases such as Iran, the socioeconomic drought is a result of inefficient and unsustainable management of water resources. Therefore, we cannot simply associate droughts with climate variability and/or change. Furthermore, due to large uncertainties in climate modelling and water management scenarios, long-term prediction of drought is impossible.
  •  
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