Sökning: onr:"swepub:oai:DiVA.org:su-61682" >
Seasonal and diurna...
Seasonal and diurnal cycles of 0.25–2.5 μm aerosol fluxes over urban Stockholm, Sweden
-
- Vogt, Matthias (författare)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
-
- Nilsson, E. D. (författare)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
-
- Ahlm, Lars (författare)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
-
visa fler...
-
- Mårtensson, E. Monica (författare)
- Uppsala universitet,Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM),Institutionen för geovetenskaper,Vatten och atmosfär (AWEP)
-
- Johansson, Christer (författare)
- Stockholms universitet,Institutionen för tillämpad miljövetenskap (ITM)
-
visa färre...
-
(creator_code:org_t)
- 2011-01-01
- 2011
- Engelska.
-
Ingår i: Tellus. Series B, Chemical and physical meteorology. - : Stockholm University Press. - 0280-6509 .- 1600-0889. ; 63:5, s. 935-951
- Relaterad länk:
-
https://www.tandfonl...
-
visa fler...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- Size resolved aerosol and gas fluxes were measured in Stockholm from 1 April 2008 to 15 April 2009 over both urban and green sectors. CO2 and H2O fluxes peaked in daytime for all seasons. CO2 concentrations peaked in winter. Due to vegetation influence the CO2 fluxes had different diurnal cycles and magnitude in the two sectors. In the urban sector, CO2 fluxes indicated a net source. The sector dominated by residential areas and green spaces had its highest aerosol fluxes in winter. In spring, super micrometer concentrations for both sectors were significantly higher, as were the urban sector rush hour fluxes. The submicrometer aerosol fluxes had a similar diurnal pattern with daytime maxima for all seasons. This suggests that only the super micrometer aerosol emissions are dependent on season. During spring there was a clear difference in super micrometer fluxes between wet and dry streets. Our direct flux measurements have improved the understanding of the processes behind these aerosol emissions. They support the hypothesis that the spring peak in aerosol emissions are due to road dust, produced during the winter, but not released in large quantities until the roads dry up during spring, and explain why Stockholm has problems meeting the EU directive for aerosol mass (PM10).
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- NATURAL SCIENCES
- NATURVETENSKAP
- Applied Environmental Science
- tillämpad miljövetenskap
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas