摘要
以１９９０年４～６月在成都采集的１１３份雨滴谱资料为基础，着重分析了低涡云系和槽后西北气流影响本地降水的雨滴谱浓度、雨水含水量、雷达反射率因子、雨滴谱型及其变化规律。分析发现，雨滴谱浓度大，含水量小，平均谱合乎Ｍ－Ｐ分布。还讨论了滴谱浓度、雨水含水量、雷达反射率因子与雨强的关系。
Based on the 113 sets of raindrop spectrum data collected in Chengdu during the peried of April toJune of 1990，the density of raindrop（N）、the ram-water content(W)、the radar reflectivity factor（Z）、the raindrop spectrum pattern and its law of chan8es are analyzed, Finally the relationshipsbetween Z and rainfall intensity（I）、between N and I、and between W and I are discussedrespectively.
基金
国家气象局气象科学基金资助课题
关键词
低涡云系
雷达反射率因子
雨滴谱
降水
：Low vortex elound system
Radar refletiviyt factor
raindrop spectrum pattern
density of raindrop
rain-wasler contents.
