水汽混合比

大气中水汽混合比的Raman激光雷达探测

Raman Lidar System for the Measurements of Water Vapor Mixing Ratio in the Atmosphere

结果表明：高原上空H2O混合比在对流层上层随高度迅速减少，在对流层顶和平流层底达到极小值，平流层里水汽混合比随高度增加。

The results show that the H2O mixing ratio decreases with height in upper troposphere quickly reaches a minimum near the tropopause and the bottom of stratosphere ; and then it increases .

水汽混合比在降水开始时达到最大值。

The water vapor mixing ratio reached a maximum value before precipitation .

水汽混合比和水汽密度随高度递减，液态水含量先增大后减小，水汽混合比、水汽密度和液态水含量均为夏季最大，冬季最小。

Liquid water content first increased and then decreased with height . Water vapor mixing ratio , vapor density and liquid water were all biggest in summer and least in winter .

另外选取降水和沙尘天气个例，分析了降水和沙尘天气出现前后及持续过程中大气温度、相对湿度、水汽混合比、水汽密度以及液态水含量等气象要素随高度和时间的变化。

In addition , the vertical distribution and temporal evolvement characteristics of temperature , relative humidity , water vapor mixing ratio , vapor density and liquid water content were analyzed in a precipitation process and a sand-dust weather process .