基于CloudSat卫星资料分析青藏高原东部夏季云的垂直结构  

Cloud Vertical Profiles from Cloud Sat Data over the Eastern Tibetan Plateau during Summer

作　　者：张晓[1,2] 段克勤[3] 石培宏[1,2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,兰州730000 [2]中国科学院大学,北京100049 [3]陕西师范大学旅游与环境学院,西安710119

出　　处：《大气科学》2015年第6期1073-1080,共8页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金项目40971290;40771209;中国科学院海外科教基地建设计划SAJC201303

摘　　要：本文利用CloudSat卫星资料,对青藏高原东部2006-2010年6-8月云垂直结构的空间分布进行分析,结果表明：（1）夏季青藏高原东部云发展可达到平流层,且高原东部云在5km以下以水云存在,5-10km以液相和固相共存的混态存在,在垂直高度10km以上以冰云存在。由于CloudSat卫星资料云相的反演问题,可能会造成水云和混态云的发展上限偏低,冰云的发展下限抬升。（2）研究区整层水汽输送和云水平均路径空间分布存在一定的差异性,云水含量纬向分布表现为在26.5°-30.5°N附近存在一个明显的峰值区,经向分布表现为95°E以西云水含量低于以东。（3）研究区以单云层为主,尤其在青藏高原主体。单云层平均云层厚度4182 m,云顶高度、云厚限于水汽的输送,表现为由南向北波动下降。多层云发生频率在27°N以北明显减少,说明强烈的对流运动更容易激发多层云的产生。The spatial distribution of the vertical variation in cloud over the eastern Tibetan Plateau during summer（June to August） of 2006-2010 was studied using CloudSat data. The results showed that：（1） The cloud over the eastern Tibetan Plateau could develop in the stratosphere in summer, and existed as water cloud below 5km, mixed with liquid and ice crystals from 5 to 10km, and was ice cloud above 10km. However, due to the problem of the inversion algorithm of the cloud phase from CloudSat data, the cloud top of the water cloud and mixed cloud may have been lower, and the cloud base of the ice clouds higher, than was actually the case.（2） There were some spatial differences between the spatial distribution of the summer mean water vapor flux and the cloud water path. The latitudinal distribution of cloud water indicated that the cloud water was sufficient from 26.5°N to 30.5°N. The longitudinal distribution of cloud water showed that the cloud water to the east of 95°E was more abundant than to the west.（3） The cloud in the study area was mainly single-layer, especially over the eastern Tibet Plateau. The average thickness of the single-layer cloud was 4182 m, and the cloud top and cloud thickness descended in a fluctuating fashion from south to north, limited by the water vapor amount. The occurrence frequency of multilayer cloud was reduced obviously to the north of 27°N, which illustrated that powerful convection was more conducive to the development of multilayer cloud.

关 键 词：云垂直结构 CloudSat卫星资料 云水含量 云层 

分 类 号：P426[天文地球—大气科学及气象学]