西北人影作业天气背景条件初步分析  

Atmospheric Circulation Analysis for Weather Modification over Northwest China

作　　者：张存杰[1,2] 张思齐 周江兴[1,2] 聂肃平[1,2] 吴萍 向阳 李想[1,2] 汪方[1,2] Zhang Cunjie;Zhang Siqi;Zhou Jiangxing;Nie Suping;Wu Ping;Xiang Yang;Li Xiang;Wang Fang(Laboratory for Climate Studies,China Meteorological Administration,Beijing 100081;Key Laboratory for Cloud Physics of China Meteorological Administration,Beijing 100081)

机构地区：[1]中国气象局气候研究开放实验室,北京100081 [2]中国气象局云雾物理环境重点开放实验室,北京100081

出　　处：《气象科技进展》2021年第5期149-157,共9页Advances in Meteorological Science and Technology

基　　金：西北区域作业天气背景条件分析(RYSY201907);西北区域人影科学试验研究项目(RYSY201909)。

摘　　要：利用高分辨率的气象台站观测资料、再分析资料、卫星遥感资料等,结合高分辨率区域气候模式模拟,对西北地区以及祁连山、天山、六盘山和三江源等试验区的降水场、气流场、水汽场等时空特征开展了研究。结果表明:精细化的降水资料能够刻画出西北试验区复杂地形条件下的降水场时空特征,研发的小时降水融合算法对西北地区高频降水分析是有效的;涝年,由于高原抽吸作用,试验区受低层形成的辐合气流所控制,容易形成降水;旱年,高原地表不存在大范围的辐合区,试验区被干冷的偏北风所控制,不利于成云降水。利用模式资料,分析了西北地区及四个试验区水汽场月、季、年气候特征,分析了水汽来源、大气可降水量、水汽收支情况以及年际变化情况。对MODIS和FY卫星反演的水汽产品进行了校准,并对西北地区水汽含量的气候特征进行了分析。In this paper,the temporal and spatial characteristics of precipitation,airflow and water vapor over Northwest China(NW)and the experimental areas of Qilian Mountain,Tianshan Mountain,Liupan Mountain and Sanjiangyuan are studied by using highresolution meteorological observation data,reanalysis data and satellite remote sensing data.Results indicated that:the temporal and spatial characteristics of the precipitation under the complex terrain conditions could be well described based on the refined precipitation data,and the developed hourly precipitation fusion algorithm is effective to analyze the high-frequency precipitation.In wet years,the experimental areas is controlled by the convergence airflow in the lower layer due to the effect of plateau suction,benefiting the formation of precipitation.In dry years,the cold northly winds prevailed in the experimental areas,not benefiting the formation of precipitation.The climate characteristics and the inter-annual change feature of the water vapor over NW and experimental areas are analyzed based on the model data.The water vapor products retrieved by MODIS and FY satellites are calibrated,and the climate characteristics of water vapor content over NW are analyzed.

关 键 词：中国西北 人工影响天气 降水场 气流场 水汽场 

分 类 号：P48[天文地球—大气科学及气象学]