| 一次低涡暴雨过程的诊断分析 |
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| 引用本文： | 夏蘩.一次低涡暴雨过程的诊断分析[J].高原山地气象研究,2020,40(4):22-29. |
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| 作者姓名： | 夏蘩 |
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| 作者单位： | 重庆市气象台,重庆401147 |
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| 基金项目： | 重庆市科学技术委员会技术创新与应用示范项目(社会民生类cstc2018jscx-msybX0019) |
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| 摘 要： | 利用FNL再分析资料和中尺度数值模式输出的高分辨率资料，分析了2016年6月30日～7月1日发生在重庆的一次低涡暴雨过程的环流背景、水汽输送特征和收支状况、云物理降水机制。结果表明:受500hPa短波槽和700hPa低涡共同影响，以及孟加拉湾和南海的暖湿气流持续输送，为此次低涡暴雨的发生、发展提供了有利的条件；南边界的水汽输入通量对整个暴雨过程中水汽的贡献最大，东边界次之。另外，降水发展不同区域不同时段，云物理降水机制都存在显著差异。渝西降水前期和后期，均为混合相降水；渝东北降水前期云系以冷云为主，后期以暖云降水为主。
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| 关 键 词： | 低涡暴雨 水汽收支 能量诊断 云微物理特征 |
| 收稿时间： | 2020-11-19 |
Diagnostic Analysis of a Vortex Rainstorm |
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| Affiliation: | Chongqing Meteorological Observatory, Chongqing 401147, China |
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| Abstract: | The circulation situation, the water vapor transport characteristics, and cloud physical mechanism of precipitation during the vortex rainstorm process in Chongqing province from June 30 to July 1, 2016 were studied based on the FNL reanalysis data and the high resolution data from the mesoscale numerical mode.The results show that affected by the 500hPa short wave trough and 700hPa vortex,and the continuous transportation of warm water vapor from the Bay of Bengal and the South China Sea,it provides favorable conditions for the occurrence and development of this vortex raintorm; the contribution of the water vapor flux from the southern boundary to the whole rainstorm process is the largest,followed by that from the eastern boundary.In addition,there are significant differences in cloud physical precipitation mechanisms in different regions and periods of precipitation development.The pre- and post-precipitation in western Chongqing is mixed-phase precipitation; the cloud system in the pre-precipitation of northeast Chongqing is mainly cold cloud,and the latter is mainly warm cloud precipitation. |
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