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@ARTICLE{Takegawa:2082,
author = {Takegawa, N. and Miyakawa, T. and Kuwata, M. and Kondo, Y.
and Zhao, Y. and Han, S. and Kita, K. and Miyazaki, Y. and
Deng, Z. and Xiao, R. and Hu, M. and van Pinxteren, D. and
Herrmann, H. and Hofzumahaus, A. and Holland, F. and Wahner,
A. and Blake, D.R. and Sugimoto, N. and Zhu, T.},
title = {{V}ariability of {S}ubmicron aerosol observed at a rural
site in {B}eijing in the summer of 2006},
journal = {Journal of Geophysical Research},
volume = {114},
issn = {0148-0227},
address = {Washington, DC},
publisher = {Union},
reportid = {PreJuSER-2082},
pages = {1 - 21},
year = {2009},
note = {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.},
abstract = {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.},
keywords = {J (WoSType)},
cin = {ICG-2},
ddc = {550},
cid = {I:(DE-Juel1)VDB791},
pnm = {Atmosphäre und Klima},
pid = {G:(DE-Juel1)FUEK406},
shelfmark = {Meteorology $\&$ Atmospheric Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000264862000003},
doi = {10.1029/2008JD010857},
url = {https://juser.fz-juelich.de/record/2082},
}