基于ISCCP DX数据的江淮对流系统特征分析  

Characteristic analysis of convective systems of the Yangtze-Huaihe River Basin based on ISCCP DX data

作　　者：周杰[1,2] 黄勇[2,3] 官莉[1] 任靖[1,2] 陈秋萍[4] ZHOU Jie;HUANG Yong;GUAN Li;REN Jing;CHEN Qiuping(School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044;Anhui Key Lab of Atmospheric Science and Satellite Remote Sensing, Hefei 230031;Shouxian National Climatology Observatory,Shouxian 232200;Fujian Meteorological Observatory,fuzhou 350001)

机构地区：[1]南京信息工程大学大气物理学院,南京210044 [2]安徽省气象科学研究所安徽省大气科学与卫星遥感重点实验室,合肥230031 [3]安徽省寿县国家气候观象台,寿县232200 [4]福建省气象台,福州350001

出　　处：《暴雨灾害》2017年第1期1-7,共7页Torrential Rain and Disasters

基　　金：安徽省自然科学基金项目(1508085MD64;1408085MKL60);中国气象局基金项目(CMAGJ2015M28);公益性行业(气象)科研专项(GYHY201306040);国家自然科学基金项目(41275030);福建省自然科学基金项目(2014J01148)

摘　　要：利用国际卫星云气候计划(International Satellite Cloud Climate Program,简称ISCCP)提供的1998—2007年共10 a的深对流路径跟踪资料,统计分析了影响江淮地区对流系统(Convection system,简称CS)的时空分布及其参数特征。结果表明:影响江淮地区的CS主要集中在春夏两季,大多生成于江淮本地及我国中西部地区,呈现以江淮地区为中心的带状分布特征,越靠近江淮区域CS分布越为密集。依据源地不同,将影响江淮地区的CS分为5类,受气候条件与地形地貌的共同作用,各源地CS参数特征差异显著,总体来说CS的水平尺度越大,其生命史、对流云团(Convective clusters,简称CC)数目及水平云温度梯度也越大。其中江淮中心区域(MID)区域CS水平尺度、生命史和CC数目的平均值均为最小;东南(SE)区域CS生命周期以中长周期为主,水平尺度、最大对流比和云温度梯度的平均值最大。梅雨期内江淮地区对流活动频繁,CS的水平尺度大、生命史长、CC数目多。The temporal and spatial distributions of convection systems(CSs) that influence the Yangtze-Huaihe River Basin, and the parameter characteristics of mesoscale convective systems from 1998 to 2007 were statistically analyzed by using Deep Convection Tracking Products provided by the International Satellite Cloud Climate Program(ISCCP).The results showed that these CSs are mainly concentrated in the spring and summer, mostly generated in the Yangtze-Huaihe River Basin and central and western regions of China. These CSs exhibit a zonal distribution characteristic with the center at the Yangtze-Huaih River Basin; the closer the area to the basin, the denser the CS distribution is.The number of CSs is much larger than other large scale convections. According to their origins, the CSs can be divided into 5 categories. Affected by climate conditions and topography, these CSs are significantly different from other each. Overall, the greater the horizontal scale of CSs is, the greater the life cycle, the number of convective clusters (CCs) and the cloud temperature gradient are. Among them, the average values of the horizontal scale, the life cycle and the number of CCs in MID region are the smallest. In the SE region, CSs are mainly with medium and long life history, where the average values of the horizontal scale, maximum convective ratio and the cloud temperature gradient of CSs are the largest. During the rainy season in the Yangtze-Huaihe River Basin, convective activity is frequent. The horizontal scale and life history of CSs are long, and there is a large number of CCs within CSs.

关 键 词：对流系统 ISCCP 江淮区域 时空分布 参数特征 

分 类 号：P445[天文地球—大气科学及气象学]