气象2026，Vol.52Issue(8)：916-927,12.DOI:10.7519/j.issn.1000-0526.2026.050901
浙江夏季FY-4A卫星云参数和降水的相关性研究
Research on the Correlation Between FY-4A Satellite Cloud Parameters and Precipitation in Summer in Zhejiang Province
摘要
Abstract
Based on the cloud products from FY-4A Satellite and the raindrop spectrometer data in Zhejiang Province,this paper analyzes the characteristics of summer precipitation and its relationship with cloud pa-rameters from 2020 to 2022.The results show that,according to the precipitation intensity,the occur-rence frequency of moderate rainfall is the highest in summer in Zhejiang,torrential rainfall mostly occurs in the mountainous areas of southern Zhejiang,and the occurrence frequency of convective cloud precipita-tion in this area is also the highest.The relationship between precipitation characteristics and cloud param-eters is manifested as follows.The occurence frequency of light rainfall is the highest for water cloud and cirrus cloud,supercooled water cloud and mixed cloud tend to result in moderate to heavy rainfall,ice cloud has the highest occurence frequency to produce heavy rainfall,particularly torrential rainfall and overlap cloud has similar precipitation features to water cloud.The average precipitation intensity increases with the decrease of cloud top temperature(CTT)and with the increase of cloud optical thickness(COT),but its correlation with cloud effective particle radius(CER)is not significant in this study.The combina-tion of two parameters(CTT and COT)demonstrates the gradient variation of precipitation intensity and its higher sensitivity to COT,with heavy precipitation more likely to occur under low CTT and high COT.Incorporating CER to construct a three-parameter combination further reflects the effect of cloud droplet coalescence efficiency on precipitation microphysical processes,leading to more precise precipitation esti-mation.Convective cloud precipitation has the characteristics of lower CTT and higher COT compared with stratiform precipitation,but the stratiform precipitation is often accompanied by convective processes.关键词
FY-4A卫星/雨滴谱/降水特征/云参数/相关性分析Key words
FY-4A Satellite/raindrop spectrometer/precipitation characteristics/cloud parameter/corre-lation analysis分类
天文与地球科学引用本文复制引用
李琦,姜舒婕,蔡淼,段婧,周毓荃,程莹,杨帆..浙江夏季FY-4A卫星云参数和降水的相关性研究[J].气象,2026,52(8):916-927,12.基金项目
风云卫星应用先行计划(FY-APP-2022.0111、FY-APP-2024.01.06)、中国气象局"揭榜挂帅"科技项目(CMAJBGS202215)和中国气象局创新发展专项(CXFZ2024J033)共同资助 （FY-APP-2022.0111、FY-APP-2024.01.06）
