南方夏旱期积云含水量和降水效率的云模式估算

MODEL ESTIMATION OF WATER CONTENT AND PRECIPITATION EFFICIENCY IN CUMULUS CLOUDS IN SUMMER DRY PERIOD IN SOUTH CHINA

在胡志晋二维对流云模式的物理框架上增加了对整块积云的含水量、地面降水量、降水效率的估算部分。改进后的模式模拟了福建夏旱期 37个降水个例 ,并估算出南方夏旱期冷云、混合云和暖云的含水量、地面降水、降水效率 ,其结果与湖南积云的实测值较接近。分析了含水量在关键时段的主要分布情况 ,为研究南方夏旱期积云的人工影响方法提供物理依据。

A cloud model estimation of water content and ground precipitation and precipitation efficiency of the whole cumulus is made by using the physical frame of the two dimensional convection cloud model from Hu Zhijin. Simulation is conducted on 37 examples of precipitation cumulus in the summer dry period in Fujian Province by the improved model, and the water content,ground precipitation and precipitation efficiency in cold clouds, mixed clouds and warm clouds in the southern summer dry period were estimated. The results are close to the measurements in cumulus in Hunan Province. An analysis is made of the main distribution of water content in the key period, which provides a physical basis for the study of artificial precipitation in cumulus in the southern summer dry period.