青藏高原近地层及北侧气压系统的季节性振荡变化

doi:10.7522/j.issn.1000-0240.2015.0039

冰川冻土 ›› 2015, Vol. 37 ›› Issue (2): 360-368.doi: 10.7522/j.issn.1000-0240.2015.0039

青藏高原近地层及北侧气压系统的季节性振荡变化

荀学义^1,2, 胡泽勇^1,3, 崔桂凤⁴, 王愚¹, 白彬人¹, 谷良雷¹

1. 中国科学院寒区旱区环境与工程研究所寒旱区陆面过程与气候变化重点实验室, 甘肃兰州 730000;
2. 内蒙古自治区气象台, 内蒙古呼和浩特 010051;
3. 中国科学院青藏高原地球科学卓越创新中心, 北京 100101;
4. 内蒙古呼和浩特市第十八中学, 内蒙古呼和浩特 010022

收稿日期:2014-10-10 修回日期:2015-01-10 出版日期:2015-04-25 发布日期:2015-06-06
通讯作者: 胡泽勇, E-mail: zyhu@lzb.ac.cn. E-mail:zyhu@lzb.ac.cn
作者简介:荀学义(1979-), 男, 内蒙古赤峰人, 2012年在中国科学院寒区旱区环境与工程研究所获博士学位, 现主要从事区域气候与陆面过程研究. E-mail: xunmengfei8@163.com
基金资助:
国家自然科学基金项目(91337212; 41175068); 国家重点基础研究发展计划(973计划)项目(2012CB026101); 寒旱区陆面过程与气候变化重点实验室开放基金项目(LPCC201306); 公益性行业(气象)科研专项(201406001)资助

Seasonal variations of the pressure systems in surface layer and northern regions of the Tibetan Plateau

XUN Xueyi^1,2, HU Zeyong^1,3, CUI Guifeng⁴, WANG Yu¹, BAI Binren¹, GU Lianglei¹

1. Key Laboratory for Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Inner Mongolia Autonomous Region Meteorological Observatory, Hohhot 010051, China;
3. CAS Center for Excellence & Innovation in Tibetan Plateau Earth System Sciences, Beijing 100101, China;
4. No.18 Middle School of Hohhot, Hohhot 010022, China

Received:2014-10-10 Revised:2015-01-10 Online:2015-04-25 Published:2015-06-06

摘要/Abstract

摘要：

基于ERA-Interim逐日4次600 hPa位势高度再分析资料, 以及青藏高原和周边地区75个气象站日平均温度、降水和相对湿度资料, 对高原近地层及北侧气压系统的季节性振荡变化进行了分析. 结果表明: 高原近地层及北侧气压系统强度在围绕中心点顺时针运动时不断加强, 逆时针运动时不断减弱. 两气压系统呈明显的跷跷板式变化, 在600 hPa上表现为高度场空间结构沿经向上的调整; 低高压差负值的开始和结束时间与高原季风起讫时间吻合. 高原夏季降水的起讫不仅与高原及北侧气压系统结构密切相关, 而且与高原东南或南部水汽输送条件息息相关.

关键词: 青藏高原, 季节性振荡变化, 近地层, 气象要素

Abstract:

Based on the reanalyzed data of ERA-Interim daily 600 hPa geopotential height and the daily mean temperature, precipitation and humidity data from 75 meteorological stations over the Tibetan Plateau and its adjacent regions, seasonal variations of pressure systems in surface layer and northern regions over the Tibetan Plateau were analyzed. The results indicated that the intensities of pressure systems in surface layer and northern regions will constantly strengthen when the system rotates clockwise surround a center and will constantly weaken when the system rotates anti-clockwise surround a center. At 600 hPa, pressure system strengthens in surface layer but weakens in northern Tibetan Plateau. The height gradient points from north to south as the plateau summer monsoon starting and points from south to north as the plateau summer monsoon ending. The starting and ending times of plateau summer precipitation are not only closely related to pressure systems in surface layer over the plateau and its northern regions, but also closely related to water vapor transport in the southeast and south Tibetan Plateau.

Key words: Tibetan Plateau, seasonal variation, surface layer, meteorological factors

中图分类号:

P642.14+1

荀学义, 胡泽勇, 崔桂凤, 王愚, 白彬人, 谷良雷. 青藏高原近地层及北侧气压系统的季节性振荡变化[J]. 冰川冻土, 2015, 37(2): 360-368.

XUN Xueyi, HU Zeyong, CUI Guifeng, WANG Yu, BAI Binren, GU Lianglei. Seasonal variations of the pressure systems in surface layer and northern regions of the Tibetan Plateau[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2015, 37(2): 360-368.

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青藏高原近地层及北侧气压系统的季节性振荡变化

Seasonal variations of the pressure systems in surface layer and northern regions of the Tibetan Plateau

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