首页|Long-term trend in aerosol optical depth from 1980 to 2001 in north China
Long-term trend in aerosol optical depth from 1980 to 2001 in north China
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Using the Total Ozone Mapping Spectrometer (TOMS) monthly aerosol optical depth (AOD) at 500 nm data from 1980 to 2001 in north China, the spatial and temporal variations of AOD were examined. Seasonal AODs in Taldimakan Desert were 0.69 and 0.44 in spring and summer,respectively, which were mainly due to frequent occurrences of dust events in this region. Dust activities in spring also led to high aerosol loading in Gobi Desert and in northeast China where spring AODs were 0.33 and 0.29, respectively. Heavily impacted by events such as volcano eruption, forest fires and extraordinary dust storms, AODs showed large inter-annual variations. A decreasing tendency in AOD was observed in north China during 1980-1991, though a reverse tendency was revealed during 1997-2001, especially for spring AOD in northeast China. Further study is required to figure out how much human activities have contributed to the AOD tendency in north China.
Total Ozone Mapping Spectrometer (TOMS)Aerosol optical depth (AOD)North China
Jiangxia Xie、Xiangao Xia
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College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China
Hunan Meteorological Bureau, Changsha 410007, China
LAGEO, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beifing 100029, China
NASA for providing TOMS AOD data国家自然科学基金国家重点基础研究发展计划(973计划)
NETL
NSTL
万方数据
