With the rapid economic development in East Asia, atmospheric aerosol becomes one of the key air pollutants, whose spatial and temporal distribution was affected by the East Asian monsoon climate. In this study, MODIS and TOMS aerosol products, as well as NCEP reanalysis monthly meteorological field data were used to statistically analyze regional distribution of aerosol optical thickness and atmospheric circulation of winter monsoon between 1979 and 2011 in East Asia. Additionally, analysis on the effect of East Asia winter monsoon on the distribution of aerosol were carried out. Investigations showed that the East Asian winter monsoon has strong inter-annual and inter-decadal variations, while inter-annual variation was more significant. In 1979-2011, East Asian winter monsoon exhibits a gradually decreasing trend. Aerosol optical thickness was continuously increasing in East Asia during recent ten years, probably due to enhancement of human activities which could intensify aerosol emissions. East Asia winter monsoon has significant influence on distribution of aerosol. For instance, strong winter monsoon can reinforce transportation of aerosols to the south area, and increasing precipitation leads to faster wet deposition and less burden of aerosol. It seems that the precipitation scavenging effect is more efficient rather than the wind transport effect.
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] IPCC. Third Assessment Report, Climate Change 2001: The Scientific Basis. New York: Cambridge University Press, 2001.
[2] Tegen I, Koch D, Lacis A A, et al. Trends in tropospheric aerosol loads and corresponding impact on direct radiative forcing between 1950 and 1990: A model study. Journal of Geophysical Research, 2000, 105: 26971~26989.
[3] 姚锦烽，王盘兴，李双林等. 利用MODIS气溶胶产品研究亚洲季风对气溶胶的传输及其分布的影响. 内蒙古气象, 2011(2): 35~40.
[4] 罗宇翔，陈 娟，郑小波等. 近10年中国大陆AOD特征. 生态环境学报, 2012,21(5): 876~883.
[5] Kaufman Y J, Tanre D, Boucher O. A satellite view of aerosols in the climate system. Nature, 2002, 419: 2152223.
[6] Liu Xiaodong, Yan Libin, ,et al. Influence of Indian summer monsoon on aerosol loading in East Asia. American Meteorological Society, 2011,3: 523~533.
[7] 晏红明,周 文,杨 辉等. 东亚冬季风指数的定义及其年际年代际异常. 大气科学学报, 2009, 32 (3) : 367~376.
[8] 朱艳峰. 一个适用于描述中国大陆冬季气温变化的东亚冬季风指数. 气象学报, 2008,66(5): ~ .
[9] 李成才, 毛节泰, 刘启汉等. 利用MODIS 研究中国东部地区气溶胶光学厚度的分布和季节变化特征. 科学通报, 2003,48(19): 2094~2100.
[10] 郭其蕴. 东亚夏季风强度指数及其变化特征. 地理学报, 1983,38:207~217.
[11] 施 能. 近年东亚冬季风强度的多时间尺度变化特征及其与气候的关系. 应用气象学报, 1996(7):175~181.
[12] 陈 隽, 孙淑清. 东亚冬季风异常与全球大气环流变化—I. 强弱冬季风影响的对比研究. 大气科学, 1999,23（23）:101~111.
[13] 晏红明，段 玮，肖子牛. 东亚冬季风与中国夏季气候变化. 热带气象学报, 2003,19(4): ~ .
[14] 贺圣平，王会军．东亚冬季风综合指数及其表达的东亚冬季风年际变化特征．大气科学，2012，36（3）：523~538.
[15] 罗云峰, 吕达仁, 李维亮等. 近30年来中国地区大气气溶胶光学厚度的变化特征. 科学通报, 2000,45(5): 549~554.
[16] 施晓晖, 徐祥德, 谢立安. 近40年来东亚冬季风的年代际时空变化趋势.大气科学, 2007,31(4): 747~756.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(8726564 KB)
