内蒙古天气系统空中水物质及降水效率分析

Analysis of water resource and precipitation efficiency in weather system in Inner Mongolia

文章利用NCEp再分析、小时降水量、探空、地面观测以及卫星资料等,从水汽、云水两方面,探究空中水物质及降水效率评估方法,分析了内蒙古自治区不同区域不同天气系统降水效率。5—9月各天气过程平均水汽初值为27mm,过程中水汽总输入量是水汽初值的36.7%,水汽降水效率为7.5%。各天气系统平均水物质总量为10mm左右,其中,水凝物初值较小,为2mm,水汽的凝结量为水凝物初值的4倍左右,过程水凝物降水效率大约为41%。全区降水效率较低,有较大的增雨潜力。

Based on the NCEP reanalysis, hourly precipitation, sounding, ground observation and satellite data, the assessmentmethod of water material and precipitation efficiency were explored from water vapor and cloud water and analyzed the precipitationefficiency of different weather systems in different regions of Inner Mongolia . The average initial value of water vapor in eachweather process from May to September was 27 mm. The total input water vapor in the process was 36.7% of the initial value ofwater vapor, and the water vapor precipitation efficiency was 7.5%. The average amount of water material in each weather system isabout 10mm, of which the initial value of cloud hydrometor is 2mm, the water vapor condensation is about 4 times of the initial valueof cloud hydrometor, and the precipitation efficiency of cloud hydrometor is about 41%. The precipitation efficiency of the wholedistrict is low and there is a large potential for increasing rainfall.