| 青藏高原近地层及北侧气压系统的季节性振荡变化 |
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| 引用本文： | 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. |
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| 作者姓名： | 荀学义 胡泽勇 崔桂凤 王愚 白彬人 谷良雷 |
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| 作者单位： | 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 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)项目，寒旱区陆面过程与气候变化重点实验室开放基金，公益性行业(气象)科研专项 |
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| 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.
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| 关 键 词： | 青藏高原 季节性振荡变化 近地层 气象要素 |
| 收稿时间： | 2014-10-10 |
| 修稿时间： | 2015-01-10 |
Seasonal variations of the pressure systems in surface layer and northern regions of the Tibetan Plateau |
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| 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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| Authors: | XUN Xueyi HU Zeyong CUI Guifeng WANG Yu BAI Binren GU Lianglei |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Tibetan Plateau seasonal variation surface layer meteorological factors |
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