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地理科学  2012 

中国气溶胶分布的地理学和气候学特征

, PP. 265-272

Keywords: 大气气溶胶光学厚度,MODIS,胡焕庸线,地理,气候

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Abstract:

中国人口地理分界线——胡焕庸线根据人口、地理,气候和经济等特点把中国(不包括港、澳、台地区)分为东、西两部分。用2000~2010年MODIS大气气溶胶光学厚度(AOD)资料,分析气溶胶分布的地理学和气候学特征后发现,胡焕庸线还可被视为中国气溶胶地理学的分界线,在其两侧气溶胶的性质和浓度都有明显差别。在人口稠密和海拔较低的东部,由人类活动产生的气溶胶为主,年平均AOD约为0.45;在西部,自然过程释放的气溶胶主导的AOD约为0.25。近10a来东部AOD的年际间变化呈现增加趋势,西部AOD出现微弱减少的趋势。东部人为气溶胶年际间变化受亚洲季风影响。西部自然气溶胶年际间变化主要受沙漠地区沙尘气溶胶排放源的影响,沙尘天气过程主要控制其气溶胶的释放。

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