摘要
利用实测资料和 MM5的数值模拟结果 ,对长江中下游中 - β尺度云雨团进行分析 .认为云团和雨团关系密切 ,云团和雨团的源头都集中在江汉平原、鄱阳湖地区和九岭山 -幕阜山一带 ,雨带位于 TBB北侧等值线较密集区 .云团移动路径向顺时针方向偏转 ,发展阶段的云团路径和低层的气流方向一致 ;消亡阶段的云团移动路径逐渐偏向高层气流的方向 .无论有无降水 ,云团内都接近中性层结 .中低层西南气流促使了云团的发展 。
In order to analyze the meso-β cloud-rain clusters at the middle reaches of Yangtze River, the practice data and the Meso-scale model MM5 were used. There is a good relationship between the meso-β cloud cluster and the rain cluster. The origins of both cloud clusters and rain clusters concentrate over three areas of Poyang lake area, Jiuling and Mufu mountain area and Jianghan Plain area. The rain belt is at the north of the TBB isogram ribbon. The routes of cloud clusters are clock-wise. When the cloud cluster is in its developing stage, it propagates along the low lever air flow, and while it is in its weakening stage, it propagates gradually along the upper lever air flow. Weather there is precipitation or not, weakly stable or unstable stratification is largely featured in the cloud cluster. The strong southwest flow at middle-low level make the developing of the cloud clusters. If there is abundant vapor, there will be heavy rain.
出处
《浙江大学学报（理学版）》
CAS
CSCD
2004年第5期589-594,600,共7页
Journal of Zhejiang University（Science Edition）
基金
973国家重点基础研究发展规划基金资助项目 ( G19980 40 90 7)
国家自然科学基金资助项目 ( 4 0 0 75 0 0 9)
关键词
TBB
中-Β尺度
合成分析
云雨团
TBB
meso-β scale
composite analysis
cloud and rain cluster
