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利用星载激光雷达资料研究东亚地区云垂直分布的统计特征
引用本文:李积明,黄建平,衣育红,等.利用星载激光雷达资料研究东亚地区云垂直分布的统计特征[J].大气科学,2009,33(4):698-707.
作者姓名:李积明  黄建平  衣育红  
作者单位:1.兰州大学大气科学学院, 兰州,730000;中国科学院大气物理研究所, 北京,100029
基金项目:国家自然科学基金资助项目40575036、 40633017
摘    要:已有研究表明: 云的垂直结构(简称CVS)是一个在卫星资料反演和气候模式预测中很重要的云特征。本文通过利用美国2006年刚发射的卫星CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) 所负载的激光雷达Level 2_05km的云数据, 研究了东亚地区(18°N~53°N, 74°E~144°E) 云的垂直分布特征。结果表明: 东亚地区多层云云量在夏季、秋季、冬季、春季分别为43.6%、29.6%、21.1%、33.3%, 而多层云分布中双层云比例最大。云顶和云底高度除了随季节变化显著外, 还有明显的区域特征。单层云、 双层云以及三层云的云顶和云底高度的数据显示, 三层云中最上层的云顶和云底最高, 并始终高于两层云中最上层云的云顶和云底高度。平均云层厚度季节变化不明显, 其值普遍在0.9~2 km范围之间。而云层间距同样没有明显的季节和区域变化, 其出现的概率随距离的增大而减小。其中, 间距在0.35 km的概率最大, 占到将近50%。而间距在1.45 km附近的概率大约为15%, 高一点的可达到20%。

关 键 词:Cloud-AerosolLidarandInfraredPathfinderSatelliteObservations  云量  云的垂直结构

Analysis of Vertical Distribution of Cloud in East Asia by Space-Based Lidar Data
LI Jiming,HUANG Jianping,YI Yuhong and et al.Analysis of Vertical Distribution of Cloud in East Asia by Space-Based Lidar Data[J].Chinese Journal of Atmospheric Sciences,2009,33(4):698-707.
Authors:LI Jiming  HUANG Jianping  YI Yuhong and
Institution:1.College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 1000292.College of Atmospheric Sciences, Lanzhou University, Lanzhou, 7300003.Science Systems and Applications Incorporated, Hampton, Virginia, USA
Abstract:Previous studies show that the cloud vertical structure is an important factor for satellite retrieval and climate simulation. Based on the Level 2_05km cloud data of lidar fixed on Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) launched by USA in 2006, the authors study the cloud vertical distribution over East Asia (18°N-53°N, 74°E-144°E). The results show that the multilayer cloud fractions in East Asia are 43.6%, 29.6%, 21.1%, and 33.3% for summer, autumn, winter, and spring, respectively. Two-layer clouds account for the largest proportion in multilayer cloud systems. The altitude of cloud layer also varies with territories apparently, besides obvious season variation. Analysis of the altitudes of cloud top and cloud base for single-layer cloud, two-layer clouds, three-layer clouds show that the top layer of three-layer cloud is the highest layer, the second is the top layer of two-layer cloud. Mean thickness of cloud layer and the distance between two consecutive layers in a multilayer cloud system have not remarkable seasonal and regional variations. The average thickness of cloud layer ranges between 0.9 km and 2 km. But the occurrence probability decreases with the increasing of distance between two consecutive layers. The probability that the distance between two consecutive layers is 0.35 km is almost 50%, the probability for the distance about 1.45 km is 15%.
Keywords:Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations
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