1954—2013年湖北省黄石市气溶胶光学厚度与降水关系研究

通过对地面观测资料进行均一性处理和反演,建立了湖北省黄石市近60年气溶胶光学厚度(AOD)的时间序列,采用气候趋势分析、相关分析等方法,研究了AOD与降水之间的关系.结果表明:近60年黄石市气溶胶光学厚度(AOD)总体上呈显著增加趋势,最大值出现在1991年.随着AOD值的显著增加,年平均降水发生日数显著减少,其中,小雨日数下降更明显,而中雨、大雨日数有增加趋势,暴雨日数的变化趋势不明显.小雨雨量随着AOD值的显著增加而减少,而中雨及以上等级降水量的变化趋势不明显.总之,近60年黄石市气溶胶光学厚度(AOD)的增加,对降水日数和降水量都有一定的影响,其相关性有待进一步研究.

Relationship between aerosol optical depth and precipitation of Huangshi City in Hubei Province from 1954 to 2013

Based on the surface observation data, this study established the time series of aerosol optical depth (AOD) of Huangshi city in Hubei Province in recent 60 years by using climate trend analysis and correlation analysis. The relationship between AOD and precipitation was investigated. The results showed that AOD increased significantly in Huangshi city in recent 60 years, with the maximum in 1991. The numbers of precipitation days and light rain days showed obvious decrease, while the numbers of moderate and heavy rain days increased and the change of rainstorm days was not significant. Light rain precipitation decreased with the significant increase of AOD, while the change trend of moderate precipitation and above was not obvious. In summary, the increase of AOD in Huangshi city in recent 60 years had impact on number of rainy days and precipitation, while the correlation remained to be further studied.