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›› 2014, Vol. 31 ›› Issue (3): 314-321.DOI: 10.7523/j.issn.2095-6134.2014.03.004

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Preliminary analysis of effects of aerosol on slight rain reduction in eastern China

GAO Yanchun, WU Jian   

  1. Department of atmospheric sciences, Yunnan University, Kunming 650091, China
  • Received:2013-07-01 Revised:2013-08-29 Online:2014-05-15

Abstract:

Both the mumber of slight rain(defined as 0~1 mm per day)days and the rainfall mount of slight rain decreased distinctly in the most regions of eastern China during the past 50 years,except in some regions in the northern part of eastern China.The positive correlation between the visibilty during dry and sunny days and the variation of slight rain were found in the regions of the Beijing-Tianjin-Tangshan district,the middle and low reaches of the Yangtze River, and the coast of southern China. At the same time, the increase of AOD(aerosol optical depth), the decrease of visibility, and the reduction of cloud droplet radius were found in the above-mentioned regions, and it is inferred that the reduction of slight rain in these regions is related to the radiative effects of aerosol.

Key words: slight rain, visibility on dry and sunny day, AOD, aerosol

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