基于CloudSat/CALIPSO数据的晋西北地区云宏观特征分析

Analysis of cloud macroscopic characteristics in northwestern Shanxi province based on CloudSat/CALIPSO data

利用CloudSat/CALIPSO资料对晋西北地区云宏观特征进行了分析,结果表明:晋西北地区云发生概率的年平均值为58.1%,其中,春季云发生概率最高,夏季次之,秋、冬两季相对较低;资料区分的8类云中,除层云未在晋西北地区出现外,卷云、高层云、高积云、层积云、积云、雨层云以及深对流云共7类云均有出现,各类云的分布表现出显著的季节特征;全年云层分布以单层云系为主,多层云系占比较少,且各类云在单层云及多层云中出现的概率及其垂直分布特征存在较大差异。研究结果为晋西北地区的云形态及发展规律、局地气候研究以及数值模式模拟等提供了参考和依据。

In this paper,CloudSat/CALIPSO data are used to analyze the macroscopic characteristics of cloud in northwestern Shanxi province.The results show that the annual average probability of cloud occurrence in northwestern Shanxi province is 58.1%.The probability of cloud occurrence in spring is the highest,followed by summer,and autumn and winter are relatively low.Among the 8 types of clouds,except St,7 types of clouds,including Ci,As,Ac,Sc,Cu,Ns and Dc,appeared in northwestern Shanxi province.The distribution of all types of clouds showed significant seasonal characteristics.The annual cloud layer distribution is dominated by single-layer cloud system,and multi-layer cloud system accounts for a small proportion.The probability and vertical distribution characteristics of various types of clouds in single-layer and multi-layer clouds are quite different.The results provide reference and basis for cloud morphology and development law,local climate research and numerical model simulation in northwestern Shanxi province.