| 2012年西南低涡影响下四川地区一次强降水过程研究 |
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| 引用本文： | 刘云丰,曾科,肖晓,汪涯.2012年西南低涡影响下四川地区一次强降水过程研究[J].高原山地气象研究,2019,39(1):12-19. |
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| 作者姓名： | 刘云丰 曾科 肖晓 汪涯 |
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| 作者单位： | 1. 中国民用航空飞行学院, 广汉 618307; |
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| 基金项目： | 中国气象局成都高原气象研究所基本科研业务经费“开展西南区域数值预报模式检验与评估” |
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| 摘 要： | 本文利用中国气象科学数据共享服务网提供的中国地面降水日值0.1°×0.1°格点数据集(V2.0)、FY-2E逐小时红外黑体辐射亮温(Temperature of Black Body,以下简称TBB)资料和欧洲中心ERA-Interim0.5°×0.5°,6小时一次温度、风场、位势高度、相对湿度等资料对2012年7月21~22日一次四川暴雨进行了初步分析。结果表明,西南低涡活动为此次四川盆地强降水过程提供了有利的发生条件。在此基础之上,副热带高压引导的暖湿空气与西伯利亚南下的冷空气相汇于四川盆地,风切变的生成,大量不稳定能量在四川盆地东部累积,和盆地上空形成的上升气流,为此次降水过程提供了有利的天气条件。随着西南低涡的东移减弱,四川盆地此次降水过程也随之结束。
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| 关 键 词： | 暴雨 西南低涡 气旋性波动 四川盆地 |
| 收稿时间： | 2019-01-23 |
Research about A Heavy Precipitation Process in Sichuan Province under the Background of Southwest Vortex in 2012 |
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| LIU Yunfeng,ZENG Ke,XIAO Xiao,WANG Ya.Research about A Heavy Precipitation Process in Sichuan Province under the Background of Southwest Vortex in 2012[J].Plateau and Mountain Meteorology Research,2019,39(1):12-19. |
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| Authors: | LIU Yunfeng ZENG Ke XIAO Xiao WANG Ya |
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| Institution: | 1. Civil Aviation Flight University of China, Guanghan 618307, China;2. Sichuan Meteorological Service Center, Chengdu 610072, China;3. Meteorological Bureau of Longquanyi District, Longquanyi 610100, China;4. Meteorological Bureau of Xindu District, Xindu 610500, China |
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| Abstract: | A heavy rainfall event in Sichuan province on July 21-22,2012 is preliminarily analyzed based on the version 2.0 of gridded China ground precipitation datasets (0.1 degree resolution),the Hourly FY-2E Temperature of Black Body (TBB) datasets provided by the China Meteorological Science Data Sharing Service,and the Six-hourly gridded (0.1x0.1) ERA-Interim atmospheric reanalysis datasets (including temperature,wind field,geopotential height,and relative humidity) from European Centre for Medium-range Weather Forecasts (ECMWF).It reveals that the Southwest Vortex activity provides the beneficial atmospheric circulation conditions for this heavy rainfall in Sichuan Basin.Based on above conditions,the subtropical high guided warm moist air and the southward Siberia cold air are converged in the Sichuan Basin,together with the generation of wind shear,the release of a large amount of unstable energy accumulated in the eastern Sichuan Basin,and an updraft is formed over the basin,which can provide favorable weather conditions for the precipitation process.With the eastward movement and weakening of the Southwest Vortex,this heavy rainfall process in Sichuan Basin terminates. |
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| Keywords: | heavy rain southwest vortex cyclonic fluctuation Sichuan Basin |
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