TY - JOUR
T1 - Seasonal characteristics of spherical aerosol distribution in eastern Asia
T2 - Integrated analysis using ground/space-based lidars and a chemical transport model
AU - Hara, Yukari
AU - Uno, Itsushi
AU - Shimizu, Atsushi
AU - Sugimoto, Nobuo
AU - Matsui, Ichiro
AU - Yumimoto, Keiya
AU - Kurokawa, Jun Ichi
AU - Ohara, Toshimasa
AU - Liu, Zhaoyan
N1 - Publisher Copyright:
© 2011, the Meteorological Society of Japan.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - Seasonal characteristics of spherical aerosol distributions in eastern Asia were investigated between July 2006 and December 2008 using data from ground-based and space-borne lidar observations and the Community Multi-scale Air Quality Modeling System (CMAQ) chemical transport model simulation. The seasonal variation of spherical aerosol optical thickness (AOT) observed at four ground lidar stations surrounding the East China Sea (Beijing, Guangzhou, Seoul, and Hedo/Okinawa) was generally consistent with CMAQ simulation results. Detailed analyses confirmed clear regional differences in aerosol compositions. Analyses of aerosol vertical profiles revealed that the spherical aerosol variation is greatest in Beijing, with scale height varying between 720 m and 2100 m. The analyses also revealed that the seasonal variation patterns of spherical AOT are classifiable into 'summer peak' and 'summer trough' types. Northern sites (Beijing and Seoul) are of the summer peak type; southern sites (Guangzhou and Okinawa) show the summer trough pattern. Our analyses demonstrated that the Asian summer-winter monsoon system plays a major role in regulating such seasonal variation. The CMAQ simulated variation of spherical aerosols is well correlated to the synoptic scale monsoon variation.
AB - Seasonal characteristics of spherical aerosol distributions in eastern Asia were investigated between July 2006 and December 2008 using data from ground-based and space-borne lidar observations and the Community Multi-scale Air Quality Modeling System (CMAQ) chemical transport model simulation. The seasonal variation of spherical aerosol optical thickness (AOT) observed at four ground lidar stations surrounding the East China Sea (Beijing, Guangzhou, Seoul, and Hedo/Okinawa) was generally consistent with CMAQ simulation results. Detailed analyses confirmed clear regional differences in aerosol compositions. Analyses of aerosol vertical profiles revealed that the spherical aerosol variation is greatest in Beijing, with scale height varying between 720 m and 2100 m. The analyses also revealed that the seasonal variation patterns of spherical AOT are classifiable into 'summer peak' and 'summer trough' types. Northern sites (Beijing and Seoul) are of the summer peak type; southern sites (Guangzhou and Okinawa) show the summer trough pattern. Our analyses demonstrated that the Asian summer-winter monsoon system plays a major role in regulating such seasonal variation. The CMAQ simulated variation of spherical aerosols is well correlated to the synoptic scale monsoon variation.
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U2 - 10.2151/sola.2011-031
DO - 10.2151/sola.2011-031
M3 - Article
AN - SCOPUS:84860194976
VL - 7
SP - 121
EP - 124
JO - Scientific Online Letters on the Atmosphere
JF - Scientific Online Letters on the Atmosphere
SN - 1349-6476
IS - 1
ER -