生态环境学报2016，Vol.25Issue(4)：621-628,8.DOI:10.16258/j.cnki.1674-5906.2016.04.011
四川盆地气溶胶变化对弱降水的影响：基于干能见度的气候分析
The Effects of Aerosol Variation on Light Rain over the Sichuan Basin：Base on Dry Visibility
摘要
Abstract
Precipitation is the major but more variable factor of climate change, light rain is more sensitive to temperature variation and aerosol. By using the daily data of precipitation, visibility and relative humidity observed at 46 weather stations over Sichuan Basin during 1973─2010, we analyzed the long term trend of light rain (0~1 mm) over Sichuan basin, and further discussed the possible relationship between light rain and aerosol variation. The results showed that, (1) precipitation contributed by light rain days exhibits a decrease trend over Sichuan Basin. The annual light rain days is 72.2 day, The decreasing rate of light rain days is -3.3 d/10 a, especially at west and north Sichuan Basin. (2) The variations of Aerosol optical extinct coefficients (AEC) are significantly positive-correlated with light rain days over most area of Sichuan basin, which is especially apparent in the areas with low visibility. (3) The variation factor of light rain days (R0) decrease 7% during the study years, while aerosol burden (represented by visibility in the study) increase, which implied that the reduction of light rain is probably related to the variation of aerosol, i.e. increasing of aerosol suppress light rain over Sichuan Basin.关键词
气溶胶气候效应/弱降水/四川盆地/干能见度Key words
climate effects of aerosol/light rain/Sichuan basin/dry visibility分类
资源环境引用本文复制引用
王健颖,郑小波,赵天良,马晓燕,郭晓梅,李跃清,罗磊..四川盆地气溶胶变化对弱降水的影响：基于干能见度的气候分析[J].生态环境学报,2016,25(4):621-628,8.基金项目
国家自然科学基金重点项目（40475005；91544109）；江苏省六大人才高峰高层次人才项目（2014JY019）；江苏省高校优势发展学科 （）
