| 河北中部一次具有后向传播特征的副高外围暖区暴雨过程分析 |
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| 引用本文： | 金晓青,李江波,于雷,闫雪瑾,于爱兵,申莉莉.河北中部一次具有后向传播特征的副高外围暖区暴雨过程分析[J].新疆气象,2018,12(4):7-14. |
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| 作者姓名： | 金晓青 李江波 于雷 闫雪瑾 于爱兵 申莉莉 |
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| 作者单位： | 河北省气象台;保定市气象台 |
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| 基金项目： | 1、国家自然(41575049)；2、城市气象科学研究(UMRF201202)；3、环渤海区域科技协同创新(QYXM201608)；4、河北省气象局强对流创新团队共同资助 |
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| 摘 要： | 利用常规观测、雷达、卫星、加密自动站资料、VDRAS系统(雷达变分分析系统)产品以及ERA-Interim再分析资料,对2013年8月11日发生在河北中部暖区中、伴有强降水和大风、具有后向传播特征的深厚湿对流过程进行分析。结果表明:这是一次发生在副高动力边界的外侧,水汽、热力及对流不稳定边界的内侧附近的过程,该区域有利的对流不稳定条件和触发抬升条件,容易产生对流天气。石家庄东部的对流雨带具有明显的后向传播特征,其发生机制为:受低空切变线和地面辐合线触发,廊坊—保定东部一线(辐合线的北侧)首先出现了雷阵雨,形成雷暴高压,在雷暴群后部(西南方)不断激发出新生雷暴,即有后向传播出现,新生雷暴并入雷暴群后,随引导气流向东北方向移动,造成列车效应,在暖区产生较强降水。
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| 关 键 词： | 副高外围，暖区暴雨，后向传播，阵风锋，冷池，地面辐合线 |
| 收稿时间： | 2018/3/26 0:00:00 |
| 修稿时间： | 2018/4/25 0:00:00 |
Analysis of a Back-propagated Heavy Rain Process Occurred in Warm Section Around the Subtropical High |
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| Jin Xiaoqing,Li Jiangbo,Yu Lei,YanXuejin,Yu Aibing and Shen Lili.Analysis of a Back-propagated Heavy Rain Process Occurred in Warm Section Around the Subtropical High[J].Bimonthly of Xinjiang Meteorology,2018,12(4):7-14. |
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| Authors: | Jin Xiaoqing Li Jiangbo Yu Lei YanXuejin Yu Aibing and Shen Lili |
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| Institution: | Hebei Provincial Meteorological Bureau,Hebei Provincial Meteorological Bureau,Baoding Meteorological Bureau,Hebei Provincial Meteorological Bureau,Hebei Provincial Meteorological Bureau,Hebei Provincial Meteorological Bureau |
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| Abstract: | Based on the conventional data, the radar data, the satellites data, the intensive automatic station data, the Variational Doppler Radar Analysis System(VDRAS) and the ERA-Interim reanalysis data, a deep moist convection which occurred in warm sector located on the edge of subtropical high at Aug. 11, 2013 was analyzed. This convection accompanied by heavy rain and strong wind had the feature of back-propagation . The results showed as follows. The convection occurred at the outside of the dynamic boundary of subtropical high and the inside of moisture, thermodynamic and convective instability boundary where water vapor, instability, and lifting met the conditions of convection. The location of dynamic and thermodynamic boundary could be used to predict the convective rain on the edge of subtropical high. Triggered by the shear line and surface convergence line, light precipitation came up first in a line from Langfang to Baoding(north side of the convergence line).After that, the gust front at the leading edge of the thunderstorm high which caused by the precipitation collided with the surface convergence line. The collision reinforced the upward movement and motivated new thunderstorms propagated reverse the steering flow as they moved northeast with the steering flow, which caused train effect and led to the heavy rain in the middle of Hebei Province. |
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| Keywords: | the out edge of subtropical high the rainstorm in warm section the back-propagation the gust front the cold pool the surface convergence line |
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