地理学报 ›› 2009, Vol. 64 ›› Issue (5): 601-608.doi: 10.11821/xb200905009

• 寒区旱区研究 • 上一篇    下一篇

夏半年青藏高原“湿池” 的水汽分布 及水汽输送特征

王霄,巩远发,岑思弦   

  1. 成都信息工程学院高原大气与环境研究中心,成都610225
  • 收稿日期:2008-11-09 修回日期:2009-03-02 出版日期:2009-05-25 发布日期:2010-08-03
  • 作者简介:王霄(1984-),男,汉族,河南新乡人,硕士研究生,主要从事气候诊断方面的研究。 E-mail: wrbeide@yahoo.com.cn
  • 基金资助:

    国家重点基础研究发展规划项目(2004CB418302);国家自然科学基金项目(40633018;40675036)

Characteristics of the Moist Pool and Its Moisture Transports over Qinghai-Xizang Plateau in Summer Half Year

WANG Xiao,GONG Yuanfa,CEN Sixian   

  1. Center for Plateau Atmospheric and Environmental Research,Chengdu University of Information Technology, Chengdu 610225,China
  • Received:2008-11-09 Revised:2009-03-02 Online:2009-05-25 Published:2010-08-03
  • Supported by:

    National Basic Research Program of China,No.2004CB418302;National Natural Science Foundation of China,No.40633018;No.40675036

摘要:

采用1948-2007 年共计60 年的NCEP/NCAR 再分析资料, 计算了夏半年(4-9 月) 青藏 高原大气中的可降水量、水汽输送通量和水汽输送通量散度, 分析了夏半年青藏高原可降水 量的分布和变化特征, 青藏高原及其附近的水汽输送。结果表明: 在对流层中层的青藏高原 上空, 夏季是一个明显的大气水汽含量高中心, “湿池” 特征非常显著, 湿池主要有三个大 的可降水量中心, 即高原的西南部、东南部和高原南侧。4-9 月, 高原上的可降水量变化很 大, 高原的增湿的速度小于减湿的速度。水汽进入高原主要通过三条水汽通道, 即西风带水 汽输送通道、印度洋—孟加拉湾水汽通道和南海—孟加拉湾水汽通道。水汽主要在高原西南 侧、喜马拉雅山中段和高原东南侧进入高原。

关键词: 高原湿池, 可降水量, 水汽输送通道, 青藏高

Abstract:

The precipitable water vapor, transfer flux of water vapor and divergency of transfer flux of water vapor over the Qinghai-Xizang Plateau in summer half year (from April to September) is calculated by using NCEP/NCAR reanalysis data obtained from 60 years from 1948 to 2007. The distribution and variation characteristic of precipitable water vapor in summer half year over the Qinghai-Xizang Plateau is analyzed. The transfer of water vapor over the whole plateau and its surrounding is analyzed. THe result shows that there is a significant high center of precipitable water vapor at the middle troposphere over the Qinghai-Xizang Plateau in summer half year. The characteristics of ‘ moist pool’ are significant, and there are three high centers of precipitable water vapor in the ‘moist pool’ , which are southwest, southeast and south sides of the plateau. The variation of pricipitable water vapor over the whole region is great from April to September. The velocity of moisture increase is faster than its decrease. Water vapor comes into the Qinghai-Xizang Plateau mainly through three moisture channels, which are westerly zone channel, Indian Ocean via the Bay of Bengal channel and South China Sea via the Bay of Bengal channel. The water vapor entering the plateau is mainly from the southeast plateau, the southwest plateau, and the middle Himalaya Mountains.

Key words: moist pool of Qinghai-Xizang Plateau, precipitable water content of atmosphere, moisture channe