NDLI: Regional-scale relationships between aerosol and summer monsoon circulation, and precipitation over northeast Asia

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McGill algorithm for precipitation nowcasting by lagrangian extrapolation (MAPLE) applied to the South Korean radar network. Part I: Sensitivity studies of the Variational Echo Tracking (VET) technique

McGill algorithm for precipitation nowcasting by lagrangian extrapolation (MAPLE) applied to the South Korean radar network. Part II: Real-time verification for the summer season

Asia-Pacific Journal of Atmospheric Sciences : Volume 46, Issue 2, May 2010

Asia-Pacific Journal of Atmospheric Sciences : Volume 46, Issue 1, February 2010

Regional-scale relationships between aerosol and summer monsoon circulation, and precipitation over northeast Asia

Content Provider	Springer Nature Link
Author	Yoon, Soon Chang Kim, Sang Woo Choi, Suk Jin Choi, In Jin
Copyright Year	2010
Abstract	We investigated the regional-scale relationships between columnar aerosol loads and summer monsoon circulation, and also the precipitation over northeast Asia using aerosol optical depth (AOD) data obtained from the 8-year MODIS, AERONET Sun/sky radiometer, and precipitation data acquired under the Global Precipitation Climatology Project (GPCP). These high-quality data revealed the regional-scale link between AOD and summer monsoon circulation, precipitation in July over northeast Asian countries, and their distinct spatial and annual variabilities. Compared to the mean AOD for the entire period of 2001–2008, the increase of almost 40–50% in the AOD value in July 2005 and July 2007 was found over the downwind regions of China (Yellow Sea, Korean peninsula, and East Sea), with negative precipitation anomalies. This can be attributable to the strong westerly confluent flows, between cyclone flows by continental thermal low centered over the northern China and anticyclonic flows by the western North Pacific High, which transport anthropogenic pollution aerosols emitted from east China to aforementioned downwind high AOD regions along the rim of the Pacific marine airmass. In July 2002, however, the easterly flows transported anthropogenic aerosols from east China to the southwestern part of China in July 2002. As a result, the AOD off the coast of China was dramatically reduced in spite of decreasing rainfall. From the calculation of the cross-correlation coefficient between MODIS-derived AOD anomalies and GPCP precipitation anomalies in July over the period 2001–2008, we found negative correlations over the areas encompassed by 105–115°E and 30–35°N and by 120–140°E and 35–40°N (Yellow Sea, Korean peninsula, and East Sea). This suggests that aerosol loads over these regions are easily influenced by the Asian monsoon flow system and associated precipitation.
Starting Page	279
Ending Page	286
Page Count	8
File Format	PDF
ISSN	19767633
Journal	Asia-Pacific Journal of Atmospheric Sciences
Volume Number	46
Issue Number	3
e-ISSN	19767951
Language	English
Publisher	Korean Meteorological Society
Publisher Date	2010-08-26
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aerosol monsoon circulation precipitation aerosol optical depth Geophysics/Geodesy Meteorology/Climatology
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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