西北太平洋主要云类型光学厚度的时空分布特征  

Temporal and Spatial Distribution Characteristics of Optical Depth of the Major Clouds Over the Northwest Pacific

作　　者：刘继承 张亭禄[1] 李聪[2] 胡连波[1] 薛毅[1] 钱晋希[2] Liu Jicheng;Zhang Tinglu;Li Cong;Hu Lianbo;Xue Yi;Qian Jinxi(College of Marine Technology,Faculty of Information Science and Engineering,Ocean University of China,Qingdao 266100,China;Institute of Telecommunication and Navigation Satellites,China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国海洋大学信息科学与工程学部海洋技术学院,山东青岛266100 [2]中国空间技术研究院通信与导航卫星总体部,北京100094

出　　处：《中国海洋大学学报（自然科学版）》2024年第11期116-125,共10页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(61975234);山东省重大科技创新工程项目(2021CXGC010705)资助。

摘　　要：本文利用CloudSat数据处理中心发布的二级云分类产品和云光学厚度产品,对西北太平洋上空主要云类型光学厚度的空间分布和季节变化特征进行了系统研究。使用云分类产品数据获得了西北太平洋上8类云的云量时空分布,以此为依据选择出云量较高的5类主要云。将二级云光学厚度产品中的数据与5类主要云类型进行匹配,获得了西北太平洋上主要云类型的平均光学厚度的空间分布及其季节变化特征。结果表明:西北太平洋上主要云类型的平均光学厚度分别为,高云约3~9,高层云约13~25,高积云约5~25,层积云约5~40,积云约5~30。各类云的光学厚度高值区主要分布在高纬度海域以及大洋西北尤其中国东部沿海海域,光学厚度低值主要分布在低纬度海域及信风带附近。此外,各类云的光学厚度在低纬度海域上季节变化幅度小,高纬度海域变化幅度大。以上结果可用于分析该区域不同地点及季节跨介质海洋激光通信系统的可通率,也可用于评估该区域可见光对海观测系统的探测能力等。The Northwest Pacific has important strategic value for our national security,economic development,and other aspects.It is of great significance to systematically understand the changes in the atmospheric and marine environment in the region.Clouds are an important component of the atmospheric environment,and studying the spatiotemporal distribution characteristics of clouds in the Northwest Pacific has significant application value.A systematic study was conducted on the spatial distribution and seasonal variation characteristics of the optical thickness of major cloud types over the Northwest Pacific using level~2 cloud classification product and cloud optical depth product released by CloudSat data processing center.Using cloud classification product data,the spatiotemporal distribution of cloud fraction for 8 types of clouds in the Northwest Pacific was obtained,and based on this,5 major cloud types with higher cloud fraction were selected.By matching the data from the level~2 cloud optical depth product with these cloud types,the spatial distribution and seasonal variation characteristics of the average optical thickness of the major clouds in the region were obtained.The results show that the average optical depths of the major clouds in the Northwest Pacific Ocean are about 3~9 for high clouds,about 13~25 for altostratus,about 5~25 for altocumulus,about 5~40 for stratocumulus,and about 5~30 for cumulus.The high value areas of optical depth are mainly distributed in high-latitude seas and the coastal waters in the northwest,especially in eastern China.The distributions of low-value areas of optical depth are mainly distributed in low latitude and near the trade-wind zone sea areas.In addition,the seasonal variations of the optical depths of clouds in low latitude are small,while significant in high latitude.The results can be used to analyze the passability of cross medium ocean laser communication systems at different locations and seasons in the region,and also to evaluate the detection ability of visible

关 键 词：云光学厚度 云类型 西北太平洋 时空分布 云卫星 

分 类 号：P426.5[天文地球—大气科学及气象学]