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高原气象  2011 

中国地区两种MODIS气溶胶产品的比较分析

, PP. 772-783

Keywords: 中国地区,AERONET,MODIS,粒子尺度分布

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Abstract:

对比分析了2003-2009年中国及其周边地区中分辨率成像光谱仪(MODIS)C004和C005的气溶胶光学厚度(AOD)产品特征,并将MODIS的气溶胶产品与AERONET观测站资料做了对比分析。结果表明:(1)中国及其周边地区AOD平均值为0.34±0.32,具有显著的空间变化;C005反演算法得到的AOD产品对C004在海洋上表现为小的正订正,在陆地上多数表现为较显著的负订正,表明MODISC005AOD反演算法在一定程度上减小了C004在陆地上的高估值;并且订正值在不同季节和不同区域也不同。(2)MODISAOD产品在不同地区具有不同的精度,香河C005AOD产品精度较C004有很大改善;而太湖C005AOD较C004没有显著改善;由于亮地表及气溶胶模型的限制,榆中的MODISAOD产品相对其他两地较差。(3)MODISAngstrom波长指数产品不能定量说明气溶胶粒子尺度分布,但可用于定性判断;MODISfAOD与AERONETfAOD有较好的线性关系,可以用来定量描述细粒子光学厚度和研究气溶胶的人为源特征。

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