云中冰粒子数浓度在强降雨过程中的垂直分布特征

The vertical distribution of colud ice particles concentration during heavy rainfall

通过CloudSat卫星监测新疆中天山及其周边地区6次强降雨过程中的8个云个例,结合地面气象站的降水观测,分析了冰粒子数浓度在垂直高度上的分布规律及其与降水量的关系.结果表明,冰粒子数浓度的高值区主要出现在云层的中上部,约6-10 km处,云层底部和顶部是冰粒子数浓度的低值区;冰粒子数浓度0-100/L的低值域段在云层的下部及底部分布较大,大于100/L的冰粒子数浓度主要分布在云层中上部.冰粒子数浓度具有地域特点,同一地区不同过程的降水云的冰粒子数浓度垂直分布特征显著性相关,且受降水量大小的影响较小.

The vertical distribution of ice particle concentration was analyzed the relationship between precipi- tation and the data from CloudSat and surface observation of precipitation at a weather station. An analysis of the data showed that the high value area of ice number-concentration mainly appeared at the upper part of the clouds, approximately at a height of 6-10 km, and the low value area of ice water number-concentration mainly appeared at the bottom and the top part of clouds. The distribution of 0-100/L low range segment of the ice number-concentration was larger in the lower part and the bottom end of the clouds, and more than 100/L of ice particles were mainly distributed in the clouds above. While the vertical distribution characteristics of the different processes of the same area of precipitation were significantly related to the cloud ice particle number concentration, they were less related to precipitation scale. Geographical features could be used preliminarily to infer ice particle number concentration.