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地理学报  2009 

海河流域太阳辐射变化及其原因分析

DOI: 10.11821/xb200911001, PP. 1283-1291

Keywords: 太阳辐射,气溶胶,海河流

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Abstract:

太阳辐射是控制气候形成的基本能量,分析太阳辐射的变化有助于深入理解气候变化的原因。本文利用海河流域及其周边46个气象站气象资料以及TOMS(theTotalOzoneMappingSpectrometer)卫星反演逐日气溶胶指数资料,分析了海河流域太阳辐射的时空变化规律,并对太阳辐射变化的原因进行了初步分析。研究结果表明,1957-2008年海河流域太阳总辐射呈明显下降趋势,其中太阳直接辐射下降趋势明显,散射辐射呈增加趋势;从空间分布上看,流域南部和冀东沿海的人口高密度区相比流域北部的燕山和太行山人口低密度区太阳总辐射减小趋势更为明显。对太阳辐射下降原因的研究表明,人类活动造成气溶胶的显著增加可能是引起太阳辐射下降的重要原因。

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