On the evaporation of raindrops in a sub-cloud layer.
On the evaporation of raindrops in a sub-cloud layer.
复制标题
关于云层下雨滴的蒸发。
DOI：
10.2151/jmsj1923.40.5_245
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发表时间：
1962
影响因子：
3.1
通讯作者：
T. Takeda
中科院分区：
文献类型：
--
作者：
S. Syōno;T. Takeda
用数值计算方法研究了雨滴在亚云层中的蒸发过程及其对亚云层状态的影响。假定该层在水平方向上是均匀的。在模型1中，假设空气处于静止状态，在模型2中，假设垂直匀速气流。得到以下结论：云下层的蒸发量大得超出预期。由于蒸发引起的冷却改变了稳定性。雷雨云下的压力穹可以用亚云层中雨滴的蒸发来解释。雨滴的大小光谱对层态的变化有重要的影响。上升气流和下降气流的蒸发水量有相当大的差异。
The evaporation of raindrops in a sub-cloud layer and the change in the state of the layer by it were treated by numerical calculation. The layer is assumed to be uniform in the horizontal. In the model 1 air is assumed to be at rest and in the model 2 vertical airflow with constant velocity is assumed. Following conclusions were obtained. The amount of evaporated-water in the sub-cloud layer is large beyond expectation. The stability is changed by the cooling due to evaporation. Pressure dome under a thunder cloud may be explained by the evaporation of raindrops in the sub-cloud layer. The size-spectrum of raindrops gives a significant influence on the changes in the state of the layer. There is considerably large difference between the amount of evaporated-water in updraft and that in downdraft.