基于MODIS云产品的北京地区卷云特性统计分析

大气与环境光学学报 ›› 2013, Vol. 8 ›› Issue (4): 271-281.

基于MODIS云产品的北京地区卷云特性统计分析

曹亚楠1,2, 魏合理1,*, 徐青山1

（1 中国科学院安徽光学精密机械研究所中国科学院大气成分与光学重点实验室, 安徽合肥 230031;
2 中国科学院大学, 北京 100039）

收稿日期:2013-04-27 修回日期:2013-05-08 出版日期:2013-07-28 发布日期:2013-07-16
通讯作者: 魏合理（1965-），男，博士，研究员，博士生导师，主要从事红外辐射大气传输和卷云红外辐射特性等方面的研究。 E-mail:hlwei@aiofm.ac.cn
作者简介:曹亚楠（1986-），女，安徽淮南人，博士研究生，主要从事卷云红外辐射特性方面的研究。
基金资助:
国家自然科学基金项目（61077081）资助

Statistics Analysis of Cirrus Properties in Beijing Region Based on MODIS Cloud Products

CAO Ya-nan1,2, WEI He-li1,?， XU Qing-shan1

(1 Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
2 University of Chinese Academy of Sciences, Beijing 100039, China)

Received:2013-04-27 Revised:2013-05-08 Published:2013-07-28 Online:2013-07-16

摘要/Abstract

摘要：

利用2007年1月到2008年12月北京地区MODIS云产品数据（MYD06），对北京地区卷云的光学厚度、有效尺度、和卷云云顶高度的概率分布和季节变化进行了统计分析，并对卷云出现的概率分布进行了研究。结果表明，卷云的云顶高度主要分布在6~12 km处，典型高度在9 km左右，卷云云顶高度分布随季节变化而变化。卷云的有效尺度主要分布在20~80 um之间，40~50 um间概率最大。卷云有效尺度随季节变化不大，并在一定程度上依赖于卷云的云顶高度。北京上空出现的冰云基本上都是不透明冰云。卷云光学厚度主要分布在0~10间，光学厚度小于5出现的概率大。冬季北京地区卷云出现的概率较小，光学厚度较小。

关键词: 卷云, 光学厚度, 有效尺度, 云顶高度, 概率分布

Abstract:

Based on the MODIS cloud products data (MYD06) in Beijing region from January 2007 to December 2008, the probability distribution and seasonal variation characteristics of cirrus optical thickness, effective size and cirrus top height were analyzed. Cirrus probability of occurrence was also studied. The results show that the distribution of cirrus top height is mostly from 6 km to 12 km, the typical cirrus top height is about 9 km. The distribution of cirrus top height varies with seasons. The distribution of cirrus effective size is from 20 um to 80 um mostly, and the most probable cirrus effective size is from 40 um to 50 um. The relation between cirrus effective size and seasons is not very obvious, but cirrus effective size is definitely dependent on cirrus top height. The ice clouds in Beijing region are mostly opaque. The distribution of cirrus optical thickness is mostly from 0 to 10, and the probability of cirrus optical thickness is bigger when cirrus optical thickness is less than 5. The probability of occurrence and optical thickness of cirrus in winter is small.

Key words: cirrus, optical thickness, effective size, cirrus top height, probability distribution

中图分类号:

P401

曹亚楠魏合理徐青山. 基于MODIS云产品的北京地区卷云特性统计分析[J]. 大气与环境光学学报, 2013, 8(4): 271-281.

CAO Ya-Nan, WEI He-Li, XU Qing-Shan. Statistics Analysis of Cirrus Properties in Beijing Region Based on MODIS Cloud Products[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(4): 271-281.

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