干旱气象 ›› 2020, Vol. 38 ›› Issue (5): 716-725.DOI: 10.11755/j.issn.1006-7639(2020)-05-0716

• 论文 • 上一篇    下一篇

基于CloudSat探测的辽宁地区夏季云系特征

潘晓1,李得勤1,公颖1,徐迪2,白华3,崔锦1   

  1. 1.中国气象局沈阳大气环境研究所,东北冷涡研究重点开放实验室,辽宁 沈阳 110166;
    2.辽宁省气象灾害监测预警中心,辽宁 沈阳 110166;
    3.辽宁省沈阳市气象局,辽宁 沈阳 110168
  • 出版日期:2020-10-30 发布日期:2020-10-30
  • 通讯作者: 李得勤(1981— ),男,甘肃民乐人,博士,主要从事中尺度数值预报和资料同化研究. E-mail: lewen05@hotmail.com。
  • 作者简介:潘晓(1988— ),女,辽宁人,博士,主要从事卫星遥感资料的分析处理、同化及其在天气和气候方面的应用研究.
  • 基金资助:
    国家自然科学基金(41705011)、辽宁省自然科学基金(20170520255)、中国气象局沈阳大气环境研究所基本科研业务费(2018SYIAEZD5、2017SYIAE12)及国家重点研发计划(2018YFC1506803、2017YFC1501806、2018YFC1506801)共同资助

Characteristics of Clouds in Summer over Liaoning Province Based on CloudSat Detection#br#

PAN Xiao1, LI Deqin1, GONG Ying1, XU Di2, BAI Hua3, CUI Jin1   

  1. 1. Institute of Atmospheric Environment, China Meteorological Administration, Opening Key Laboratory for Northeast Cold Vortex Research, Shenyang 110166, China;
    2. Liaoning Meteorological Disaster Monitoring and Early Warning Centre, Shenyang 110166, China;
    3. Shenyang Meteorological Bureau of Liaoning Province, Shenyang 110168, China
  • Online:2020-10-30 Published:2020-10-30

摘要: 基于2007—2010年夏季CloudSat数据产品融合资料,对辽宁地区夏季单层和多层云系的发生概率、组成、垂直结构、微物理结构及相应的环境温湿特征进行研究。结果表明:(1)夏季辽宁地区主要由单层云组成,其次为双层云。单层云系主要由卷云和高层云组成,其次是高积云和深厚对流云。多层云系上层以卷云为主,双层云下层主要由高积云、高层云和层积云组成,而三层云多以中层为高层云和高积云、下层为层积云的组合出现。(2)多层云系中各云层的回波强度和云层厚度均小于单层云系。(3)单层云系和多层云系中各云层的微物理量(粒子数密度、有效半径、云水含量)平均廓线垂直分布类似,但多层云系平均值相对较小,且下层大于上层,这与组成云层的类型有关,其中深厚对流云最大,卷云最小。(4)有云条件下大气中水汽较晴空时更充足。白天,有云条件下近地面温度降低,夜晚则相反。

关键词: CloudSat, 单层和多层云系, 云类, 云垂直结构, 云微物理结构

Abstract: Based on the merged data of CloudSat from June to August during 2007-2010, the occurrence probability, vertical structure, type, microphysical structure of single-layer and multi-layer clouds and their environmental temperature and humidity over Liaoning Province were investigated. The results are as follows: (1) The clouds were mainly composed of single-layer cloud over Liaoning Province in summer from 2007 to 2010, and then followed by double-layer cloud. The single-layer clouds were mainly consisted of cirrus and altostratus, and then followed by altocumulus and deep convection. The cirrus mainly distributed at upper layer of multi-layer clouds. The altocumulus, altostratus and stratocumulus mainly distributed at lower layer of double-layer clouds, while the altostratus and altocumulus mainly dominated at middle layer and the stratocumulus mainly dominated at lower layer of triple-layer clouds. (2) The echo intensity and cloud thickness for each layer of multi-layer clouds were less than those of single-layer cloud. (3) The vertical profiles of microphysical quantities (particle number density, effective radius and cloud water content) for each layer of multi-level clouds were similar to single-layer cloud, while their average values were relatively smaller, and they decreased gradually from top to bottom, which were related to cloud types, namely the values of deep convection were the largest and cirrus were the smallest. (4) Compared with clear sky, the specific humidity on cloudy weather was larger, which indicated that the water vapour of atmosphere on cloudy weather was more abundant. The average near-surface temperature was lower under the cloudy weather during the daytime, while it was opposite at night.

Key words: CloudSat, single-layer and multi-layer clouds, cloud type, cloud vertical structure, cloud microphysical structure

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