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| 3. |
- Aretun, Åsa, 1970-, et al.
(författare)
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GoMate – Diversifierad elfordonspool för den förtätade staden : slutrapport
- 2019
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- I GoMate-projektet har diversifierad elfordonspool vid boendet testats: pool bestående av elcyklar, elassisterade lådcyklar och elbilar, i två innerstadsområden i Jönköping. Det övergripande syftet med projektet har varit att undersöka om och i vilken utsträckning som en diversifierad elfordonspool kan bidra till minskad bilanvändning till förmån för användning av mer hållbara mobilitetslösningar.Resultaten visar att en diversifierad elfordonspool har potential att minska bilanvändningen. Det är framförallt elcykel som ersätter bilresor till vardags, vilket på sikt kan minska bilinnehav till förmån för nyttjande av biltjänster vid enstaka tillfällen (sällanresor).Om potentialen ska kunna realiseras krävs dock pris- och affärsmodeller för pooltjänsterna som stimulerar till minskad bilanvändning, betraktat som en process som kan förväntas ske successivt över tid. En sådan process behöver vidare understödjas av policy, styrmedel och åtgärder som begränsar och försvårar bilresande i innerstaden.Om potentialen ska realiseras behöver också poolverksamheten skalas upp betydligt avseende antal fordon per lägenhet. Trots att det var en relativt stor poolverksamhet med totalt 17 (varav 15 cyklar) fordon för 160 hushåll, som testades i projektet, så hade den endast kapacitet att försörja en mycket liten andel av de boendes totala resande, och med mycket små effekter avseenden bidrag till energioch klimatmål.
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- Boman, Johan, 1955, et al.
(författare)
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Elemental content of PM2.5 aerosol particles collected in Göteborg during the Göte-2005 campaign in February 2005
- 2008
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Ingår i: Atmos. Chem. Phys. Discuss. ; 8:2, s. 7703-7724
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Tidskriftsartikel (refereegranskat)abstract
- Göte–2005 was a measurement campaign in the city of Göteborg with the aim of studying the influence of the winter thermal inversions on urban air pollution. Elemental speciation of PM2.5 aerosol particles, collected on Teflon filters at three urban sites and one rural site in the Göteborg region, was a major part of the study. Trace element analysis was done by Energy Dispersive X-Ray Fluorescence (EDXRF) spectrometry and the concentrations of S, Cl, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, Br and Pb were determined. The elemental content of the particles in combination with information of local wind speed and direction and also backward trajectories were used to estimate the source areas of the pollutants. We can conclude that S, V, Ni, Br, and Pb have their main sources outside the Göteborg area, since we cannot see elevated concentrations of these elements during an inversion episode. Sea traffic and harbour activities were also identified, primarily by the S and V content of the particles. This study proves that the elemental analysis by EDXRF presents valuable information for tracing the origin of air masses arriving at a measurement site.
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| 5. |
- Boman, Johan, 1955, et al.
(författare)
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Elemental content of PM2.5 aerosol particles collected in Göteborg during the Göte-2005 campaign in February 2005
- 2009
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Ingår i: Atmospheric Chemistry and Physics. - : Copernicus GmbH. - 1680-7316 .- 1680-7324. ; 9, s. 2597-2606
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Tidskriftsartikel (refereegranskat)abstract
- The Göte-2005 measurement campaign aimed at studying the influence of the winter thermal inversions on urban air pollution. Elemental speciation of PM2.5 aerosol particles, collected on Teflon filters at three urban sites and one rural site in the Göteborg region, was a major part of the study. Trace element analysis was done by Energy Dispersive X-Ray Fluorescence (EDXRF) spectrometry and the concentrations of S, Cl, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, Br and Pb were determined. The elemental content of the particles, local wind speed and direction, and backward trajectories were used to investigate possible sources for the pollutants. We concluded that S, V, Ni, Br, and Pb had their main sources outside the central Göteborg area, since elevated concentrations of these elements were not observed during an inversion episode. Sea traffic and harbour activities were identified, primarily by the S and V content of the particles. This study showed that the elemental analysis by EDXRF presents valuable information for tracing the origin of air masses arriving at a measurement site.
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| 6. |
- Lundberg, Thomas, 1965-, et al.
(författare)
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Indikatorer för Trafikverkets uppföljning av underhåll på belagda vägar : leveranskvaliteter för de transportpolitiska målen
- 2022
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Ett sätt för Trafikverket att följa upp effekterna av underhållet på de statliga vägarna är genom att använda sig av indikatorer. De indikatorer som beskrivs i denna rapport benämns som andra ordningens indikatorer och byggs upp av underliggande data. Indikatorerna som vi valt att arbeta med ska på ett allsidigt och transparent sätt beskriva hur Trafikverket uppfyller leveranskvaliteten för punktlighet, kapacitet, robusthet, användarbarhet, säkerhet samt miljö och hälsa. I denna förstudie sammanfattar vi en kunskapsöversikt för valda indikatorer och förslag på hur de kan implementeras i Trafikverkets pavement management system. De indikatorer som vi arbetar med är Säkerhet, Komfort, Strukturellt tillstånd, Rullmotstånd, Buller, Luftkvalitet, Godsskador, Ytskador, Fordonsslitage och slutligen en indikator för Hälsa. Det finns många aspekter att ta hänsyn till då en indikator introduceras. Den absolut viktigaste är, bortsett från att den är validerad, att den får acceptans och används. Det finns många sätt att använda en indikator och att enbart titta på absoluta värden är svårt för en sammansatt indikator. Relativa skillnader vid årliga uppföljningar är att föredra för att avgöra om strategier får avsedd effekt.
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| 8. |
- Rogerson, Sara, et al.
(författare)
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SeaCharging - Investigating the Need for Standardised Charging Infrastructure for Maritime Electrified Vessels
- 2022
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The transport sector, including maritime transport, is facing accelerating electrification, where it is important that charging infrastructure is developed in parallel with electrified vessels. In today's few examples, charging technology is adapted to specific vessels and conditions. The possibility of using standards and standardisation to increase the efficiency of introducing electrified vessels has been the focus of the SeaCharging project. The middle segment of ships, such as waterborne public transport, is facing a rapid increase in electrification. The project begins with an exploratory analysis of the current situation with charging stations in Sweden. This analysis covers the obstacles, needs and opportunities in different shipping segments and geographical areas. This results in an informative review providing input to standardisation committees, but also ports and shipping companies. Dissemination of the project’s results was achieved via a workshop, a number of seminars and this final report directed at the maritime, energy, technology, and standardisation communities. Together with Lighthouse, we will in early 2023, do a broad workshop for the whole sector, presenting the final project results and putting them into a wider context.
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| 9. |
- Shannigrahi, Ardhendu Sekhar, 1965, et al.
(författare)
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n-Alkanoic monocarboxylic acid concentrations in urban and rural aerosols : Seasonal dependence and major sources
- 2014
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Ingår i: Atmospheric research. - : Elsevier BV. - 0169-8095 .- 1873-2895. ; 143, s. 228-237
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Tidskriftsartikel (refereegranskat)abstract
- We report new data on the abundance and distribution of n-monocarboxylic acids (n-MCAs) in fine- and coarse-mode aerosols in rural and urban areas of Sweden, and determine their possible sources. Overall, C6–C16n-MCAs accounted for ~ 0.5–1.2% of the total PM10 (particulate matter ≤ 10 μm) mass. In general, the C12–C16 fraction was the most abundant (> 75%), with the exception of wintertime samples from a rural site, where C6–C11 acids accounted for 65% of the total C6–C16n-MCA mass. Positive matrix factorization analysis revealed four major sources of n-MCAs: traffic emissions, wood combustion, microbial activity, and a fourth factor that was dominated by semi-volatile n-MCAs.Traffic emissions were important in the urban environment in both seasons and at the rural site during winters, and were a major source of C9–C11 acids. Wood combustion was a significant source at urban sites during the winter and also to some extent at the rural site in both seasons. This is consistent with the use of wood for domestic heating but may also be related to meat cooking. Thus, during the winter, traffic, wood combustion and microbial activity were all important sources in the urban environment, while traffic was the dominant source at the rural site. During the summer, there was considerable day-to-day variation in n-MCA concentrations but microbial activity was the dominant source. The semi-volatile low molecular weight C6–C8 acids accounted for a small (~ 5–10%) fraction of the total mass of n-MCAs. This factor is unlikely to be linked to a single source and its influence instead reflects the partitioning of these compounds between the gas and particle phases. This would explain their greater contribution during the winter.
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| 10. |
- Svane, Maria, 1957, et al.
(författare)
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On-line alkali analysis of individual aerosol particles in urban air
- 2005
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Ingår i: Atmospheric Environment. - : Elsevier BV. - 1352-2310. ; 39:36, s. 6919-6930
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Tidskriftsartikel (refereegranskat)abstract
- On-line measurements of individual alkali-containing submicron particles in ambient air have been performed at two urban sites in Goteborg, on the west coast of Sweden. Results obtained with a recently developed particle beam mass spectrometer are presented. This instrument combines an optimized particle inlet with mass spectrometric techniques and detection of particle-bound alkali metal is based on surface ionization technique. The concentrations of Na and K in submicron particles were followed over periods of a few weeks. Mass concentrations of alkali in ambient air varied in the range 0.02-100 ng m(-3) during the measurement periods depending on air mass history, wind direction, season, and contributions from local sources. The number of alkali-containing particles varied between 0.1 and 100 cm(-3). Most detected individual particles contained a relatively small amount of Na, and few particles had sufficient Na content to be identified as pure sea-salt particles. The detected aerosol was concluded to be dominated by emissions from combustion of biomass and fossil fuels, with a significant contribution from sea-salt particles only during intrusion of marine air. This conclusion was supported by backward air mass trajectories and calculated K/Na weight ratios that generally agreed well with earlier measurements in urban environments. (c) 2005 Elsevier Ltd. All rights reserved.
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