摘要
使用葵花-8(H-8)卫星气溶胶光学厚度(AOD)资料,基于逐像元的趋势率分析和相关性分析等方法,对2016—2020年四川盆地AOD时空分布演变特征及其气象条件进行研究,结果表明:(1)2016—2020年AOD呈现明显先减后增的月变化特征,秋冬大于春夏。年变化为前4年较平稳,2020年下降明显。(2)盆地各市AOD趋势率均为下降,并呈现盆中下降明显、盆周趋势较缓的环形分布特征。(3)2016-2020年AOD与降水、温度、风速呈负相关,与相对湿度呈正相关。近5年盆地AOD总体呈下降趋势。
The spatial-temporal distribution characteristics of aerosol optical depth(AOD)and its evolution trend rate and meteorological conditions in Sichuan basin from 2016 to 2020 were studied by using Himawari-8(H-8)satellite products,based on pixel-by-pixel trend rate analysis and correlation analysis.The results show that:(1)From 2016 to 2020,AOD showed a clear monthly change trend of first decreasing and then increasing,the seasonal characteristics of autumn and winter were greater than that of spring and summer.The annual change was relatively stable in the previous four years,and the decline was significant in 2020.(2)The AOD trend rate showed a downward trend in all municipal administrative regions in Sichuan Basin,with a circular distribution pattern of obvious downward trend in the basin and slow downward trend in the basin.(3)From 2016 to 2020,AOD was negatively correlated with precipitation,temperature,wind speed,and positively correlated with relative humidity.The AOD of the basin has generally shown a downward trend in the past five years.
作者
晏惠芬
李晓敏
马联敏
郑自君
YAN Huifen;LI Xiaomin;MA Lianmin;HENG Zijun(Xichang Meteorological Station,Xichang 615000,China;Sichuan Meteorological Disaster Prevention Technology Centre,Chengdu 610072,China;Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610072,China)
出处
《高原山地气象研究》
2023年第S01期119-124,共6页
Plateau and Mountain Meteorology Research
基金
高原与盆地暴雨旱涝灾害四川省重点实验室科技发展基金项目(SCQXKJQN2020046、SCQXKJYJXMS202210)。
关键词
四川盆地
气溶胶光学厚度
葵花-8
趋势分析
气象条件分析
Sichuan Basin
Aerosol optical depth
Himawari-8 Satellite
Trend analysis
Meteorological condition analysis
