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Title: Concentrations and estimated soot content of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} in a subarctic urban atmosphere

Abstract

Mass concentrations of ambient particulate matter were measured in terms of daily average values of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} for 6 months during the winter of 1996--1997 at a fixed sampling site in Helsinki, Finland, along with meteorological parameters and particle number concentrations in the size range 0.01--1 {micro}m. In addition, the PM filters were subjected to reflectometric analysis to determine absorption coefficients for the various fractions of urban particulate matter. The data were divided into two periods (winter and spring) in order to study more closely seasonal phenomena that have an effect on air pollution patterns. The variations in PM{sub 10} and PM{sub 2.5} concentrations differed in pattern during resuspended dust episodes, whereas those in PM{sub 1} concentrations followed those in PM{sub 2.5} fairly well throughout the 6-month measurement period. Thus it seems that PM{sub 1} does not provide much additional information on mass concentrations relative to PM{sub 2.5}. Number concentrations in the ultrafine particle size range from 0.01 to 0.1 {micro}m, especially in wintertime, were much better correlated with absorption coefficients than with any of the three PM mass-based concentrations, indicating that Black Smoke particles are related to that size range. The results also indicatemore » that coarse particle concentrations in ambient air are affected more by seasonal factors than are fine particle concentrations.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Kuopio (FI)
OSTI Identifier:
20080453
Resource Type:
Journal Article
Journal Name:
Environmental Science and Technology
Additional Journal Information:
Journal Volume: 34; Journal Issue: 10; Other Information: PBD: 15 May 2000; Journal ID: ISSN 0013-936X
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; AIR POLLUTION; SOOT; PARTICULATES; ECOLOGICAL CONCENTRATION; AIR POLLUTION MONITORING; PARTICLE SIZE; SEASONAL VARIATIONS

Citation Formats

Vallius, M.J., Ruuskanen, J., Mirme, A., and Pekkanen, J. Concentrations and estimated soot content of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} in a subarctic urban atmosphere. United States: N. p., 2000. Web. doi:10.1021/es990603e.
Vallius, M.J., Ruuskanen, J., Mirme, A., & Pekkanen, J. Concentrations and estimated soot content of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} in a subarctic urban atmosphere. United States. doi:10.1021/es990603e.
Vallius, M.J., Ruuskanen, J., Mirme, A., and Pekkanen, J. Mon . "Concentrations and estimated soot content of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} in a subarctic urban atmosphere". United States. doi:10.1021/es990603e.
@article{osti_20080453,
title = {Concentrations and estimated soot content of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} in a subarctic urban atmosphere},
author = {Vallius, M.J. and Ruuskanen, J. and Mirme, A. and Pekkanen, J.},
abstractNote = {Mass concentrations of ambient particulate matter were measured in terms of daily average values of PM{sub 1}, PM{sub 2.5}, and PM{sub 10} for 6 months during the winter of 1996--1997 at a fixed sampling site in Helsinki, Finland, along with meteorological parameters and particle number concentrations in the size range 0.01--1 {micro}m. In addition, the PM filters were subjected to reflectometric analysis to determine absorption coefficients for the various fractions of urban particulate matter. The data were divided into two periods (winter and spring) in order to study more closely seasonal phenomena that have an effect on air pollution patterns. The variations in PM{sub 10} and PM{sub 2.5} concentrations differed in pattern during resuspended dust episodes, whereas those in PM{sub 1} concentrations followed those in PM{sub 2.5} fairly well throughout the 6-month measurement period. Thus it seems that PM{sub 1} does not provide much additional information on mass concentrations relative to PM{sub 2.5}. Number concentrations in the ultrafine particle size range from 0.01 to 0.1 {micro}m, especially in wintertime, were much better correlated with absorption coefficients than with any of the three PM mass-based concentrations, indicating that Black Smoke particles are related to that size range. The results also indicate that coarse particle concentrations in ambient air are affected more by seasonal factors than are fine particle concentrations.},
doi = {10.1021/es990603e},
journal = {Environmental Science and Technology},
issn = {0013-936X},
number = 10,
volume = 34,
place = {United States},
year = {2000},
month = {5}
}