李晨蕊,王天河,吕巧谊,李积明

• 1:兰州大学半干旱气候变化教育部重点实验室
• 2:兰州中心气象台

摘要(Abstract)：

利用2007年3月-2010年2月3年的CloudSat资料,2008年3月-2010年2月的TRMM_3B43资料,分析了东亚季风区(EMA)和南亚季风区(SMA)降水量的季节性差异、降水云的发生频率及宏观垂直结构特征(包括云层数、云厚、雨顶高度、冻结降水出现最大高度、雷达反射率垂直分布)及云类型季节变化.结果表明,EMA降水云的出现频率随季节变化先降低后升高,SMA则相反,先升高再降低,夏季达到最大值.EMA降水云以单层云为主,云顶高度随季节有明显的起伏变化,SMA则以单层云与双层云为主.EMA降水云云厚的季节变化明显:夏季最厚,冬季最薄;SMA云厚无明显季节变化,云厚发展高于EMA.两区域降水云均以深对流云及雨层云为主,但EMA降水云除夏季以深对流云为主外,其他三季雨层云占主导地位,而SMA则以深对流云为主,雨层云次之.从雷达反射率来看,降水云主要集中在8 km以下,雷达反射率在-15～15 dBz,降水云中雷达反射率随高度降低的趋势先增强后减弱,但SMA粒子增长速度较快,粒子累积带也大于EMA.

关键词(KeyWords)： 东亚季风区;南亚季风区;降水云;云垂直结构;云类型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41430425,41375031)

作者(Author): 李晨蕊,王天河,吕巧谊,李积明

DOI: 10.13885/j.issn.0455-2059.2018.03.008

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