利用多普勒天气雷达、 地面自动站降水资料和探空资料,研究了吉林省春季降水性层状云的宏观特性与降水的关系。结果表明,云厚度、 云冷层厚度与降水关系的总体趋势是厚度越大， 产生的降水越大； 云顶温度与降水的总体趋势是云顶温度越低， 则降水越大； 0 ℃层下部平均回波强度与降水符合幂律相关性； 相关系数检验显示, 0 ℃层下部平均回波强度与降水的相关性最好， 相关系数为0.63； 根据各宏观特征量与降水的关系得到了不同降水量级的判别指标。
Using the Doppler weather radar data, precipitation data of automatic weather station and sounding data, the relationship between macroscopic property of stratiform cloud and precipitation in Jilin Province in spring was studied. The results show that: The overall trend between the cloud thickness, cold cloud thickness and the precipitation relationship is that the thickness is thicker, the precipitation is greater. The overall trend of cloud top temperature and precipitation is that the cloud top temperature is lower, the precipitation is greater. Mean reflectivity (z) below 0 ℃ and precipitation consistents with power law correlation. The correlation coefficient test of fitting equation shows that the correlation between the mean echo intensity under 0 ℃ lower layer and precipitation is the best, the correlation coefficient is 0.63. The different precipitation grades are obtained from the relation between macroscopic characteristic and precipitation.
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