冰云粒子微物理属性在一次强降雨过程中的垂直分布  

Vertical distributions microphysical properties of ice particles in a heavy rain

作　　者：邓军英[1] 丁明月 王文彩[2] 光莹[1] 陈勇航[1] 辛渝[3] 崔彩霞[3] 丁逸洲 朱曦[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]中国海洋大学海洋环境学院,山东青岛266100 [3]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002

出　　处：《干旱区地理》2016年第3期590-599,共10页Arid Land Geography

基　　金：中国沙漠气象科学基金(Sqj2012002);国家科技支撑计划项目(2012BAC23B01)

摘　　要：采用美国宇航局NASA的Cloud Sat卫星资料2B-CWC-RVOD和2B-CLDCLASS,并结合CERES Aqua MODIS Edition 3A资料,分析了一次降水过程中云类型和云中冰粒子微物理属性的垂直分布特征,探讨其与降雨量大小的关系。结果表明：冰云分布在2-11 km,越小的云参量值的出现频率越大。冰粒子有效半径在垂直高度上的分布存在明显的分层现象,且随着高度的升高呈变小的趋势。半径〉150μm的粒子集中在2-4 km;半径在100-150μm的粒子85.6%分布在2-6km;而半径〈50μm的粒子在整个云层均有分布,且分布比例随云层的升高而增大。冰水含量在垂直高度上呈近似正态分布,高值分布在云层中部6-7 km,且正在降雨地区云的冰水含量和柱含量值比非降雨区大。冰粒子数浓度随云层高度的上升呈增大的趋势。The water problem of Xinjiang has two sides：one is that the shortage of water resources has increasingly become a serious threat to the economic sustainable development, and another is that flood, waterlogging, landslide and debris flow caused by heavy rainfall are the main natural disasters in the region. A lot of researches were conducted on heavy rainfall, yet which were mainly focused on the climatological characteristics and dynamics of heavy rainfall. Cloud, the carrier and indicator of rainfall, is still less involved due to a lack of observation data. The role of clouds in rainfall process was studied with the traditional static and polar orbit satellite data, while passive remote sensing observation instruments loaded on satellite can only reflect the average state of whole the atmosphere. In this paper, employing the retrieval data 2B-CLDClASS and 2B-CWC-RVOD from cloud profiling radar onboard CloudSat satellite and CERES Aqua MODIS Edition 3A from NASA, the heavy rain happened along Tianshan Mountain in northern Xinjiang on April 28, 2008 was studied. Cloud classification and the vertical distribution of cloud microphysical properties and its correlation with precipitation were analyzed. It was found that the cloud distributed from 1 to 12 km in the study area, while the ice cloud distributed from 2 to 11 km and ice particles were only within altostratus, deep convective clouds, and stratus, cumulus and high clouds. The deep convective clouds, stratus and cumulus exists precipitation clouds in the research region. Overall, regardless of height, the smaller the cloud parameters value, the greater the occurrence. Ice effective radius （IER） varied from 27.1 μm and 180.2 μm. IER emerged obvious stratification in the vertical height and the lower the cloud layer, the higher the IER value. Particles with IER more than 150 μm, accounted for 18.11 percent, concentrated distribution within 2-4 km height layer. 85.6 percent of particles with IER within 100-150 μm distributed in 2-6 km. Those with IER l

关 键 词：CLOUDSAT AQUA 降水云 冰粒子有效半径 

分 类 号：P426.51[天文地球—大气科学及气象学] P458.121