| 1. |
- Genberg, Johan, et al.
(författare)
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Light-absorbing carbon in Europe - measurement and modelling, with a focus on residential wood combustion emissions
- 2013
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Ingår i: Atmospheric Chemistry And Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 13:17, s. 8719-8738
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Tidskriftsartikel (refereegranskat)abstract
- The atmospheric concentration of elemental carbon (EC) in Europe during the six-year period 2005-2010 has been simulated with the EMEP MSC-W model. The model bias compared to EC measurements was less than 20% for most of the examined sites. The model results suggest that fossil fuel combustion is the dominant source of EC in most of Europe but that there are important contributions also from residential wood burning during the cold seasons and, during certain episodes, also from open biomass burning (wildfires and agricultural fires). The modelled contributions from open biomass fires to ground level concentrations of EC were small at the sites included in the present study, <3% of the long-term average of EC in PM10. The modelling of this EC source is subject to many uncertainties, and it was likely underestimated for some episodes. EC measurements and modelled EC were also compared to optical measurements of black carbon (BC). The relationships between EC and BC (as given by mass absorption cross section, MAC, values) differed widely between the sites, and the correlation between observed EC and BC is sometimes poor, making it difficult to compare results using the two techniques and limiting the comparability of BC measurements to model EC results. A new bottom-up emission inventory for carbonaceous aerosol from residential wood combustion has been applied. For some countries the new inventory has substantially different EC emissions compared to earlier estimates. For northern Europe the most significant changes are much lower emissions in Norway and higher emissions in neighbouring Sweden and Finland. For Norway and Sweden, comparisons to source-apportionment data from winter campaigns indicate that the new inventory may improve model-calculated EC from wood burning. Finally, three different model setups were tested with variable atmospheric lifetimes of EC in order to evaluate the model sensitivity to the assumptions regarding hygroscopicity and atmospheric ageing of EC. The standard ageing scheme leads to a rapid transformation of the emitted hydrophobic EC to hygroscopic particles, and generates similar results when assuming that all EC is aged at the point of emission. Assuming hydrophobic emissions and no ageing leads to higher EC concentrations. For the more remote sites, the observed EC concentration was in between the modelled EC using standard ageing and the scenario treating EC as hydrophobic. This could indicate too-rapid EC ageing in the model in relatively clean parts of the atmosphere.
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| 2. |
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| 3. |
- Fredricsson, Malin, et al.
(författare)
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Nationell luftövervakning Sakrapport med data från övervakning inom Programområde Luft t.o.m 2019
- 2021
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Naturvårdsverket ansvarar för den nationella luftövervakningen i bakgrundsmiljö i Sverige. I rapporten redovisas resultat från verksamheten inom Programområde Luft avseende mätningar (genomförda av IVL, SU, SLU och SMHI) till och med 2019 och regionala modellberäkningar (utförda av SMHI) till och med 2018.För flertalet av de luftföroreningskomponenter som övervakas inom den nationella miljöövervakningen har det, sedan mätningarna startade för mellan 20 och 40 år sedan, generellt sett skett en avsevärd förbättring avseende såväl halter i luft som deposition i bakgrundsmiljö. Utvecklingen har dock varierat i något olika utsträckning beroende på komponenter och lokalisering i landet. Föroreningsbelastningen är oftast lägre ju längre norrut i landet man kommer.För de flesta ämnen som det finns miljökvalitetsnormer (MKN) respektive miljömål för ligger halterna i regional bakgrund avsevärt lägre än angivna gräns- och målvärden. Halterna av ozon överskrider dock i dagsläget (2019) MKN för hälsa.
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| 4. |
- Alastuey, Andres, et al.
(författare)
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Geochemistry of PM10 over Europe during the EMEP intensive measurement periods in summer 2012 and winter 2013
- 2016
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Ingår i: Atmospheric Chemistry And Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 16:10, s. 6107-6129
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Tidskriftsartikel (refereegranskat)abstract
- The third intensive measurement period (IMP) organised by the European Monitoring and Evaluation Programme (EMEP) under the UNECE CLTRAP took place in summer 2012 and winter 2013, with PM10 filter samples concurrently collected at 20 (16 EMEP) regional background sites across Europe for subsequent analysis of their mineral dust content. All samples were analysed by the same or a comparable methodology. Higher PM10 mineral dust loadings were observed at most sites in summer (0.5-10aEuro-A mu gaEuro-m(-3)) compared to winter (0.2-2aEuro-A mu gaEuro-m(-3)), with the most elevated concentrations in the southern- and easternmost countries, accounting for 20-40aEuro-% of PM10. Saharan dust outbreaks were responsible for the high summer dust loadings at western and central European sites, whereas regional or local sources explained the elevated concentrations observed at eastern sites. The eastern Mediterranean sites experienced elevated levels due to African dust outbreaks during both summer and winter. The mineral dust composition varied more in winter than in summer, with a higher relative contribution of anthropogenic dust during the former period. A relatively high contribution of K from non-mineral and non-sea-salt sources, such as biomass burning, was evident in winter at some of the central and eastern European sites. The spatial distribution of some components and metals reveals the influence of specific anthropogenic sources on a regional scale: shipping emissions (V, Ni, and SO42-) in the Mediterranean region, metallurgy (Cr, Ni, and Mn) in central and eastern Europe, high temperature processes (As, Pb, and SO42-) in eastern countries, and traffic (Cu) at sites affected by emissions from nearby cities.
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| 5. |
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| 6. |
- Bayard, Ove, 1967-, et al.
(författare)
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An innovative approach in implementation of work based learning for industrial engineering
- 2015
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Ingår i: ICERI2015 Proceedings. - : IATED. - 9788460826576
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- To have specific knowledge and competence directly related to a company´s key business area are important for the well-being and future of an enterprise. Informal knowledge that has been acquired through practical experience or task solving is often a hidden treasure and a resource that is not used with full capacity in many companies. To recognise, facilitate and make better use of this unexplored competence that the staff has and combine it with other relevant knowledge can be very beneficial for internal work based learning activities, especially in the industrial engineering sector. The Life Long Learning/ Leonardo da Vinci project, WBL-IE (Work Based Learning-Industrial Engineering) target this area and presents an innovative approach on how to implement work based learning in an efficient way for industrial engineering.The WBL-IE project team and its members have gathered experiences and knowledge from previous projects. In the Experience Transfer Model (ETM) project a platform for exchange of experiences among people active in industry was developed. The ETM concept was well accepted by the participants and the cross disciplinary activities were seen as beneficial for both problem solving and strategy proposals. PHASE (Processer til håndtering af skræddersyede efteruddannelsesforløb) is another project that has contributed with experiences. Focus in PHASE has been on how education providers can meet the need for knowledge and updates in industry, in which forms the education should be delivered and how education can be tailor made to meet the needs from companies, especially SME´s. The evaluation showed that the Worked Based Learning (WBL) concept was considered to have a high potential and that all of the interviewed companies ranked tailor made CE-activities high.The ongoing learning processes in engineering organizations are very powerful and can be further enhanced by actions which are time and cost effective. In order to make use of this possibility it is important to create awareness about the existence of these learning processes. Some of the processes are self-supporting but others can be effectively enhanced. Example of the first is contact with colleagues, look for previous experiences. Other process as for instance learning by mistake, searching for information and contacts with outside experts can be effectively supported. The WBL-IE concept takes a holistic view on the learning for both individuals and the organization. Mapping of the learning situation show the potential improvement areas and give possibilities to plan for actions. The WBL-IE concept includes both support of on-going processes and introduction of new tailor made activities.The intention of the WBL-IE concept is to improve the possibilities for slimmed and work loaded organization to increase their skill and knowledge. Experiences from the introduction of the concept and how it is received are presented. This part of the implementation is very crucial to the development of the support program. Examples of the facilitator function is given and also how to secure the continuation of the program.The future work includes development of the support function and its financing possibilities. More feedback from experiences will be used for both the introduction process and development of tailor made activities.
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| 7. |
- Bayard, Ove, 1967-, et al.
(författare)
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WBL-IE, a new approach to on site learning in Industrial Engineering
- 2015
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Ingår i: Edulearn15. - : IATED-INT ASSOC TECHNOLOGY EDUCATION A& DEVELOPMENT. - 9788460682431 ; , s. 7538-7545
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Konferensbidrag (refereegranskat)abstract
- To have the “right” competence for a specific work task has become very important in a world of high competition, continuous developments and fast changes. Without the necessary skills to handle a task the future for an enterprise can easy become uncertain. Since time is limited the process of acquiring relevant competence has to be efficient. There are many ways to build up knowledge in a new field. A common practice is to let the employees take courses in house or outside the company. The knowledge providers for these activities are typically learning institutes, educational companies or universities.The WBL-IE project presents a model that focuses on SMEs Small and Medium-sized Enterprises and work based learning, where tailor made learning activities play an important role. This model tries to pin- point the key educational areas of interest for the actual company. The start point is to find out the specific needs that the enterprise has and what complimentary skills and competences are necessary to strengthen, broaden and make better use of the knowledge that already exist within the company.The WBL-IE project target SME with less than 250 employees. Characteristic for these companies are that they have slimmed organisations and often no real focus on Continuous Engineering Education (CEE). Education activities are therefore closely linked to short term requirements and actions. The SME´s are acting on a high competitive market and often need to make very prompt decisions based on strategic choices.The WBL-IE work is based on earlier research in education modes in industrial engineering. One of the most interesting findings came from an interview campaign regarding continuous education in SMEs active in industrial engineering. Very few of the companies if any had a plan for their competence development to present. But at a deeper analysis you could find an important number of learning activities going on. There was in fact an unwritten competence development plan. This means that SMEs already have a competence development process going on. With this observation in mind a new approach to the implementation of education activities in SMEs was developed, the WBL-IE concept. The WBL-IE concept starts with an interview session with a number of stakeholders in the company organization. The interviews are made after a guide especially developed by WBL-IE with the goal the give a realistic and complete picture of the many different learning processes going on in the organization. The role of WBL-IE is both to introduce the concept and implement and maintain it. The role means to have resources for analysing, proposing and supporting the competence development in SMEs active in industrial engineering. One of the most important factors in the implementation is the facilitator. The facilitator is a person with the ability to enhance the different learning processes in the company.The concept of WBL-IE model involves creating a learning environment that promotes focused learning in different settings. To meet the stakeholder on her/his home arena gives a deeper understanding of the companies’ situation and in which direction they are aiming at. A thorough understanding of the current state will help the stakeholder and the facilitator to pin point key issues to address and together develop a plan that will be beneficial for the company. A program for pilot tests is running and findings/results will be reported.
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| 8. |
- Cavalli, F., et al.
(författare)
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A European aerosol phenomenology-4 : Harmonized concentrations of carbonaceous aerosol at 10 regional background sites across Europe
- 2016
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Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310 .- 1873-2844. ; 144, s. 133-145
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Tidskriftsartikel (refereegranskat)abstract
- Although particulate organic and elemental carbon (OC and EC) are important constituents of the suspended atmospheric particulate matter (PM), measurements of OC and EC are much less common and More uncertain than measurements of e.g. the ionic components of PM. In the framework of atmospheric research infrastructures supported by the European Union, actions have been undertaken to determine and mitigate sampling artefacts, and assess the comparability of OC and EC data obtained in a network of 10 atmospheric observatories across Europe. Positive sampling artefacts (from 0:4 to 2.8 mu g C/m(3)) and analytical discrepancies (between -50% and +40% for the EC/TC ratio) have been taken into account to generate a robust data set, from which we established the phenomenology of carbonaceous aerosols at regional background sites in Europe. Across the network, TC and EC annual average concentrations range from 0.4 to 9 mu g C/m(3), and from 0.1 to 2 mu g C/m(3), respectively. TC/PM10 annual mean ratios range from 0.11 at a Mediterranean site to 0.34 at the most polluted continental site, and TC/PM2.5 ratios are slightly greater at all sites (0.15-0.42). EC/TC annual mean ratios range from 0.10 to 0.22, and do not depend much on PM concentration levels, especially in winter. Seasonal variations in PM and TC concentrations, and in TC/PM and EC/TC ratios, differ across the network, which can be explained by seasonal changes in PM source contributions at some sites.
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| 9. |
- Ferm, Martin, et al.
(författare)
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Measurements of PM1, PM2.5 and PM10 in air at Nordic background stations using low-cost equipment
- 2008
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Mass concentrations of PM1, PM2.5 and PM10 in air were measured at four EMEP stations in the Nordic countries during 2006. All stations used the same low-cost equipment for sampling PM1, but used different techniques for the other size fractions. The PM1 filters were analysed for inorganic ions for the first half of June. PM1 constituted on average more than half of the PM2.5 concentrations, but was on average less than half of the PM10 concentrations. There were two episodes of high PM1 concentrations during the year, one in May-June and another one in August-September. The highest PM1 concentrations were found during South-Easterly wind trajectories and lowest concentrations during northerly trajectories. Even though the annual average mass relations between the three size fractions were rather independent of the trajectory sectors, the fine and the coarse particle masses were not correlated on a daily basis. The PM2.5 concentration, which is the parameter that should be measured within EU, correlated fairly well with the concentration of accumulation mode particles (PM1). In June only a minor fraction of PM1 consisted of inorganic ions. Only ammonium and sulphate ions of the measured ions in PM1 were well correlated with one another.
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| 10. |
- Fredricsson, Malin, et al.
(författare)
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Nationell luftövervakning – Sakrapport med data från övervakning inom Programområde Luft t.o.m. 2017
- 2018
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Naturvårdsverket, Luftenheten, ansvarar för den nationella luftövervakningen i bakgrundsmiljö i Sverige. I rapporten redovisas resultat från verksamheten inom Programområde Luft avseende mätningar (genomförda av IVL, SU, SLU och SMHI) till och med 2017 och regionala modellberäkningar (utförda av SMHI) till och med 2016.För flertalet av de luftföroreningskomponenter som övervakas inom den nationella miljöövervakningen har det, sedan mätningarna startade för mellan 15 och 35 år sedan, generellt sett skett en avsevärd förbättring avseende såväl halter i luft som deposition i bakgrundsmiljö. Utvecklingen har dock varierat i något olika utsträckning beroende på komponenter och lokalisering i landet. Föroreningsbelastningen är oftast lägre ju längre norrut i landet man kommer.För de flesta ämnen som det finns miljökvalitetsnormer (MKN) respektive miljömål för ligger halterna i regional bakgrund avsevärt lägre än angivna gräns- och målvärden. Halterna av ozon överskrider dock i dagsläget MKN för hälsa.
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