文章摘要
大西洋上四个爆发性气旋的云微物理特性垂直结构分析
Vertical Structure of Microphysical Properties of CloudsAssociated with Four Explosive Cyclones over the Atlantic Ocean
投稿时间:2021-06-08  修订日期:2021-08-02
DOI:
中文关键词: 大西洋  爆发性气旋  CloudSat  云微物理特性  垂直结构
英文关键词: Atlantic Ocean  Explosive Cyclone  CloudSat  Cloud Microphysical Properties  Vertical Structure
基金项目:国家自然科学基金项目(41775042)
作者单位邮编
彭永茂 中国海洋大学海洋与大气学院海洋气象系 266100
傅刚 中国海洋大学海洋与大气学院海洋气象系 266100
鄢珅 中国海洋大学海洋与大气学院海洋气象系 266100
陈莅佳 中国海洋大学海洋与大气学院海洋气象系 266100
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中文摘要:
   本文利用CloudSat卫星数据处理中心(CloudSat Data Processing Center, CloudSat DPC)提供的CloudSat卫星数据、欧洲中期天气预报中心(European Centre for Medium-Range Weather Forecasts, ECMWF)提供的ERA5再分析资料和美国国家航空航天局(National Aeronautics and Space Administration, NASA)提供的Aqua卫星可见光云图,对冬春季发生在大西洋上四个爆发性气旋个例的云微物理特性垂直结构进行了分析。结果表明,爆发性气旋中心云系多为层积云或积云,中心外围云系以雨层云为主,雨层云外部往往伴随着相似高度的高层云,气旋冷锋云带内以雨层云、高层云和高积云为主, 冰粒子出现的最低高度与0℃等温线高度几乎重合。冰粒子有效半径随高度的增加而减小,而冰粒子数浓度随高度增加而增大。冰水含量大值区主要集中分布在雨层云中部,随高度变化向高空和低空均为减少的趋势。液态水主要分布在高层云和层积云底部,冬季爆发性气旋个例内的液态水含量大于春季。
英文摘要:
   In this paper, the vertical structures of microphysical properties of clouds associated with four explosive cyclones over the Atlantic Ocean occurred in winter and spring seasons were investigated by using the satellite data provided by CloudSat Data Processing Center (CloudSat DPC), ERA5 reanalysis data provided by the European Centre for Medium-Range Weather Forecasts (ECMWF), and the satellite visible imagery from the National Aeronautics and Space Administration (NASA) Aqua satellite. The results showed that in central part of explosive cyclone, clouds were dominated by stratocumulus or cumulus. The clouds outside the cyclone center were dominated by nimbostratus. In the outside region of nimbostratus, clouds were often accompanied by altostratus with the similar height. In the cloud belt of the cyclone, nimbostratus, altostratus and altocumulus were dominant. The minimum height at which ice particles appearing almost coincided with the height of 0℃ isotherm. The effective radius of ice particles decreased with the height increasement, while the ice particle number concentration increased with the of height increasement. The large value area of ice water content was mainly concentrated in the middle part of the nimbostratus. With the change of height, there was a decreasing trend for ice water content both upper-level and lower-level. The liquid water content was mainly distributed in the bottom of altostratus and stratocumulus. The content of liquid water in winter explosive cyclone was greater than that of spring explosive cyclone.
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