| 基于热源作用的青藏高原东坡一次夜间暴雨的诊断分析 |
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| 引用本文： | 王政明,李国平.基于热源作用的青藏高原东坡一次夜间暴雨的诊断分析[J].新疆气象,2023,17(1):96-103. |
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| 作者姓名： | 王政明 李国平 |
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| 作者单位： | 成都信息工程大学大气科学学院,成都信息工程大学大气科学学院 |
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| 基金项目： | 91937301，42075013 |
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| 摘 要： | 利用ERA5再分析资料、CMORPH融合降水资料和山地通量观测资料对2020年6月26日发生在四川冕宁一次夜间致灾暴雨进行综合诊断分析。结果表明：本次夜间暴雨发生前，白天地面热源存在明显的正异常变化，地面热源的正异常区与降水有很好的对应关系。同时大气热源（视热源和视水汽汇）与暴雨的关系密切且相互影响，降水释放凝结潜热，加热大气，使得视热源也随之增加。在暴雨发展强盛阶段，视水汽汇的垂直输送项达到最大，而视水汽汇的局地变化项能很好指示整个暴雨过程中区域水汽的净输送状况。
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| 关 键 词： | 夜间暴雨 冕宁 地面热源 视热源 视水汽汇 |
| 收稿时间： | 2021/7/23 0:00:00 |
| 修稿时间： | 2021/12/15 0:00:00 |
Diagnosis and Analysis of a Heavy Rain at Night on the East Slope of the Tibetan Plateau Based on the Effect of Heat Source |
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| WangZhengMing and LiGuoPing.Diagnosis and Analysis of a Heavy Rain at Night on the East Slope of the Tibetan Plateau Based on the Effect of Heat Source[J].Bimonthly of Xinjiang Meteorology,2023,17(1):96-103. |
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| Authors: | WangZhengMing and LiGuoPing |
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| Abstract: | Using ERA5 reanalysis data, CMORPH fusion precipitation data and Chongqing mountain flux observation data, a comprehensive diagnosis and analysis of a disaster-causing nocturnal rainstorm occurred in Mianning, Sichuan on June 26, 2020. The results show that: before the occurrence of the heavy rain at night, there were obvious positive anomalous changes in the surface heat source during the day, and the positive anomaly area of the surface heat source had a good corresponding relationship with the precipitation. At the same time, atmospheric heat sources (apparent heat sources and apparent water vapor sinks) have a close relationship and mutual influence with heavy rain. Precipitation releases latent heat of condensation, heating the atmosphere, and increasing apparent heat sources. In the strong rainstorm stage, the vertical transportation of the water vapor sink reaches the maximum; the local change of the water vapor sink can well indicate the net transportation status of the regional water vapor during the entire rainstorm process. |
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| Keywords: | heavy rain at night Mianning ground heat source apparent heat source apparent water vapor sink |
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