2002～2003年7～9月赣北地区对流云降水与降水效率特征分析  

CONVECTIVE CLOUDS PRECIPITATION AND PRECIPITATION EFFICIENCY CHARACTERISTICS IN NORTH JIANGXI FROM JULY TO SEPTEMBER OF 2002 AND 2003

作　　者：李玉林[1] 杨梅[2] 

机构地区：[1]江西省人工影响天气领导小组办公室,江西南昌330046 [2]江西省气象台,江西南昌330046

出　　处：《气象与减灾研究》2006年第4期26-30,共5页Meteorology and Disaster Reduction Research

基　　金：国家"十五"科技攻关资助项目(2001BA610A-06-01).

摘　　要：根据南昌多普勒天气雷达获取的2002～2003年7～9月36个不同时刻1.5°、2.4°基本反射率因子、组合反射率因子、回波顶高、回波面积和垂直积分液态含水量,与同时刻地面雨量进行逐步回归分析,建立了多元回归方程。分析结果表明,合并对流单体整个生命期间的液态含水量,比强对流单体液态含水量少269.76×106m3,比对流单体多198.68×106m3。强对流单体的降水效率最大,平均值为25.74%,比对流单体多15.74%,比合并对流单体多13.21%。According to the regression analysis of 36 datasets of Nanchang Doppler weather radar, including Basic Reflectivity with elevation of 1.5° and 2.4°, Composite Reflectivity, Echo Top, echo area and Vertical Integrated Liquid and the ground rainfall, the multi-dimensional regression equation is established. The result indicates that Merger convective cell＇s liquid in its whole lifetime 269.76×106 m^3. fewer than strong convective cell, and 198.68×106 m^3. more than normal convective cell. The precipitation efficiency of strong convective cell is the biggest, the mean value of which is 25.74%, and is 15.74% more than convective cell and 13.21% than normal convective cell.

关 键 词：赣北 对流云 降水 效率 分析 

分 类 号：P481[天文地球—大气科学及气象学]