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Diurnal variation of atmospheric aerosol during the wood combustion season in Northern Sweden
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
2008 (English)In: Atmospheric Environment, ISSN 1352-2310, E-ISSN 1873-2844, Vol. 42, no 18, 4113-4125 p.Article in journal (Refereed) Published
Abstract [en]

A set of aerosol measurements was conducted in the residential area of Forsdala in Lycksele, Northern Sweden, during winter 2005/2006. This article describes the temporal and diurnal variation of the aerosol physical properties (concentrations of PM10, PM1, light-absorbing carbon, and particle number, and number size distributions), and the relationship among aerosol concentrations and meteorological variables. A large day-to-day and hour-to-hour variability in aerosol concentrations was observed during the intensive study period. Evening aerosol concentrations were statistically significantly higher on weekends than on weekdays. On weekdays, particle size distribution and concentrations varied diurnally with small particles (diameter <30 nm) associated mainly with morning motor vehicle emissions. The results suggest that a combination of emissions from residential wood combustion and traffic sources might explain the high evening concentrations of PM10, PM1, particle number, and light-absorbing carbon as well as large geometric mean diameters observed during weekdays and weekends. Strong correlations of PM10 and PM1 with particle size distributions are found in the diameter range 130–500 nm and are remarkably high on weekend evenings when larger particles are sampled. The correlation between light-absorbing carbon mass concentration and particle size distribution is high regarding both particle number and mass for particle diameters >95 nm. High aerosol concentrations were associated with low air temperatures and very stable atmospheric conditions close to the ground.

Place, publisher, year, edition, pages
2008. Vol. 42, no 18, 4113-4125 p.
Keyword [en]
Residential wood combustion, Black carbon, Particle size distribution, PM10, PM1
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-25067DOI: 10.1016/j.atmosenv.2008.01.026ISI: 000257498700008OAI: oai:DiVA.org:su-25067DiVA: diva2:198827
Available from: 2008-05-14 Created: 2008-05-09 Last updated: 2017-12-13Bibliographically approved
In thesis
1. Impact of residential wood combustion on urban air quality
Open this publication in new window or tab >>Impact of residential wood combustion on urban air quality
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Wood combustion is mainly used in cold regions as a primary or supplemental space heating source in residential areas. In several industrialized countries, there is a renewed interest in residential wood combustion (RWC) as an alternative to fossil fuel and nuclear power consumption. The main objective of this thesis was to investigate the impact of RWC on the air quality in urban areas. To this end, a field campaign was conducted in Northern Sweden during wintertime to characterize atmospheric aerosol particles and polycyclic aromatic hydrocarbons (PAH) and to determine their source apportionment.

A large day-to-day and hour-to-hour variability in aerosol concentrations was observed during the intensive field campaign. On average, total carbon contributed a substantial fraction of PM10 mass concentrations (46%) and aerosol particles were mostly in the fine fraction (PM1 accounted for 76% of PM10). Evening aerosol concentrations were significantly higher on weekends than on weekdays which could be associated to the use of wood burning for recreational purposes or higher space heat demand when inhabitants spend longer time at home. It has been shown that continuous aerosol particle number size distribution measurements successfully provided source apportionment of atmospheric aerosol with high temporal resolution. The first compound-specific radiocarbon analysis (CSRA) of atmospheric PAH demonstrated its potential to provide quantitative information on the RWC contribution to individual PAH. RWC accounted for a large fraction of particle number concentrations in the size range 25-606 nm (44-57%), PM10 (36-82%), PM1 (31-83%), light-absorbing carbon (40-76%) and individual PAH (71-87%) mass concentrations.

These studies have demonstrated that the impact of RWC on air quality in an urban location can be very important and largely exceed the contribution of vehicle emissions during winter, particularly under very stable atmospheric conditions.

Place, publisher, year, edition, pages
Stockholm: Institutionen för tillämpad miljövetenskap (ITM), 2008. 40 p.
Keyword
residential wood combustion, air quality, aerosols, black carbon, polycyclic aromatic hydrocarbons, particulate matter, particle size distributions, source apportionment, positive matrix factorization, compound-specific radiocarbon analysis
National Category
Earth and Related Environmental Sciences
Research subject
Applied Environmental Science
Identifiers
urn:nbn:se:su:diva-7682 (URN)978-91-7155-608-0 (ISBN)
Public defence
2008-06-04, William-Olssonsalen, Geovetenskapens hus, Svante Arrhenius väg 8 A, Stockholm, 13:00
Opponent
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Available from: 2008-05-14 Created: 2008-05-09Bibliographically approved

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