Hauptseite > Publikationsdatenbank > Variability of Submicron aerosol observed at a rural site in Beijing in the summer of 2006 > print

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024 7 _ |a 10.1029/2008JD010857
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024 7 _ |a 0141-8637
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024 7 _ |a 2128/20399
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037 _ _ |a PreJuSER-2082
041 _ _ |a eng
082 _ _ |a 550
084 _ _ |2 WoS
|a Meteorology & Atmospheric Sciences
100 1 _ |0 P:(DE-HGF)0
|a Takegawa, N.
|b 0
245 _ _ |a Variability of Submicron aerosol observed at a rural site in Beijing in the summer of 2006
260 _ _ |a Washington, DC
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|c 2009
300 _ _ |a 1 - 21
336 7 _ |a Journal Article
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440 _ 0 |0 6393
|a Journal of Geophysical Research D: Atmospheres
|v 114
|x 0148-0227
|y D00G05
500 _ _ |a The authors acknowledge the NOAA Air Resources Laboratory (ARL) for providing the HYSPLIT transport and dispersion model and READY website (http://www.arl.noaa.gov/ready.html) used in this publication. The measurements by the UT group were supported by the Japan Society for the Promotion of Science (JSPS). This measurement campaign was conducted as a part of CAREBEIJING 2006, which was supported by Beijing Council of Science and Technology (HB200504-6, HB200504-2). This study was conducted also as a part of the Mega-Cities: Asia Task under the framework of the International Global Atmospheric Chemistry (IGAC) project.
520 _ _ |a Ground-based measurements of aerosol and trace gases were conducted at a rural site in Beijing in the summer of 2006 as a part of the Campaigns of Air Quality Research in Beijing and Surrounding Region 2006 (CAREBeijing 2006). The size-resolved chemical composition of submicron aerosol was measured using an Aerodyne quadrupole aerosol mass spectrometer (AMS). The data obtained from 15 August to 10 September 2006 are presented. Meteorological analysis shows that the measurement period can be characterized as a cycle of low wind speed periods over the course of a few days (stagnant periods) followed by rapid advection of clean air from the north./northwest mostly due to passage of a midlatitude cyclone. Mass concentrations of total measured aerosol with diameters less than 1 mu m (total PM1), which is defined as the sum of elemental carbon and nonrefractory components measured by the AMS, were highly variable, ranging from similar to 2 to similar to 100 mu g m(-3). Large variability of the PM1 composition and drastic changes in the sulfate (SO42-) size distribution were observed to be associated with the cycle of stagnant periods and advection of clean air, indicating that both chemical and physical properties of aerosols were significantly altered on a time scale of a few days. We have found the dominance of organic aerosol at lower total PM1 mass loadings and that of SO42- at higher mass loadings, which may have important implications for the PM control strategy in Beijing. Possible factors affecting the evolution of the mass concentration and size distribution of SO42- are discussed.
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856 7 _ |u http://dx.doi.org/10.1029/2008JD010857
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