近21年丹江口流域空中云水量特征及与面雨量的关系  

Characteristic of Cloud Water and its Correlation with Area Rainfall in Danjiangkou Basin in the Last 21 Years

作　　者：陈英英 王明 蔡淼[3] 贾文茜 李德俊 谭静 CHEN Ying-ying;WANG Ming;CAI Miao;JIA Wen-qian;LI De-jun;TAN Jing(Hubei Provincial Meteorological Server Centre,Wuhan 430205,China;Institute of Heavy Rain,CMA,Wuhan 430205,China;Chinese Academy of Meteorological Sciences,Beijing 100081,China)

机构地区：[1]湖北省气象服务中心,湖北武汉430205 [2]中国气象局武汉暴雨研究所,湖北武汉430205 [3]中国气象科学研究院,北京100081

出　　处：《长江流域资源与环境》2022年第12期2672-2681,共10页Resources and Environment in the Yangtze Basin

基　　金：中国气象局创新发展专项(CXFZ2022J036);国家重点研发计划项目(2016YFA0601704);中部区域丹江口水库汇水区人工增雨(雪)研究试验(ZXC-H22255)。

摘　　要：利用2001~2021年丹江口流域降水资料及MODIS云水路径产品,采用统计方法分析地面降水与空中云水的时空演变特征及相关关系。结果表明:(1)近21年丹江口流域面雨量略有增加,空间分布西南多东北少、季节特征显著。(2)丹江口流域平均液水路径小于300 g/m^(2),季节变化不明显,空间差异不大,与反演算法的局限性有关;而平均冰水路径和云水路径分别为150~500 g/m^(2)和250~750 g/m^(2),均在夏季出现峰值、季节特征与面雨量吻合,且由于受地形影响、地域分布特征明显。定量分析显示,云水路径与面雨量存在较好的相关性(相关系数为0.73)。(3)丹江口流域冬季云水更新周期较长,12月可达34.5 h,夏季云水循环较快,7月云水更新周期仅为2.7 h。Based on the rainfall data and MODIS/cloud water path product of Danjiangkou Basin from 2001 to 2021, statistical methods are used to analyze the spatial and temporal evolution characteristics and correlation between cloud water and area rainfall. The results show that:(1) In the past 21 years, the area rainfall of Danjiangkou Basin has increased slightly, the spatial distribution is more in the southwest and less in the northeast, and the seasonal characteristics are significant.(2) The average annual liquid water path of Danjiangkou Basin is less than 300 g/m^(2), the seasonal variation is not obvious, and the spatial difference is not significant, which is related to the limitation of MODIS retrieving algorithm;while the ice water path and the cloud water path are 150~500 g/m^(2) and 250~750 g/m^(2), respectively, all peaked in summer. The seasonal characteristics are consistent with area rainfall, due to the influence of topography, the geographical distribution characteristics are obvious. Quantitative analysis shows that there is a good correlation between cloud water path and areal rainfall(the correlation coefficient is 0.73).(3) The “cloud water renewal period” of Danjiangkou Basin is longer in winter, up to 34.5 hours in December, while the cloud water circulation is faster in summer, the renewal period in July is only 2.7 hours.

关 键 词：丹江口流域 空中云水量 MODIS 云水更新周期 

分 类 号：P463.3[天文地球—大气科学及气象学]