利用雷达回波资料对夏季对流云降水的初步探讨  

DISCUSSION ON CONVECTIVE CLOUD PRECIPITATION IN SUMMER USING RADAR ECHO DATA

作　　者：陈秋萍 曾光平[2] 冯宏芳[2] 隋平[2] 郑淑贞[2] 

机构地区：[1]福建省建阳气象雷达站,建阳354200 [2]福建省气象科学研究所,福州350001

出　　处：《应用气象学报》2002年第3期339-346,共8页Journal of Applied Meteorological Science

基　　金：福建省科技厅支持的重大科研项目

摘　　要：20 0 0年 7～ 9月在福建省建阳气象雷达站利用“71 3 C”数字化雷达完整地观测到 1 0 1块对流云生成、发展、消亡过程。通过对这些资料分析 ,探讨夏季对流云降水机制。分析表明 :夏季对流云中初始回波出现在 0℃层以下 ,单体对流云占 89.2 % ,多单体对流云占 77.8% ,其中回波及地时 ,主体回波扩展到冷暖区多单体明显高于单体 (各为 77.8%和 6 3 .9% )。由于多单体对流云其回波强度、尺度及降水时长都大于单体对流云 。By using '713' digitized radar, the formation, development and dissipation processes of 101 convective clouds have been observed from July to September 2001 in the Jianyang weather radar station. Through analyzing these data, the convective cloud precipitation mechanisms in summer are discussed. The results indicate that initial echoes of 89.2% convective and 77.8% multiple-cell convective clouds appear below the 0 ℃ level; when the echoes reach the ground, compared to convective cells, the major echoes of obviously more multiple-cell convective clouds would expand to the cold/warm zone. Because the echo intensity, scale, precipitation time of multiple-cell convective clouds are greater than the convective cells, they are key precipitation cloud systems in summer and important to artificial precipitation.

关 键 词：雷达回波 对流云 降水机制 人工催化 

分 类 号：P426.6[天文地球—大气科学及气象学]