青岛地区一次冷涡槽前强对流天气过程分析

Analysis of the Process of Strong Convective Weather in the Background of Cold Vortex in Qingdao

摘要: 利用多普勒天气雷达、FNL、ECMWF及FY-2F静止卫星等数据，对发生在山东的一次冷涡背景下的短时强降水伴随冰雹的强对流天气过程进行了详细的分析。深厚冷涡槽前的强上升气流，高层急流造成的强垂直风切变以及地面辐合线配合为此次强对流天气提供了十分有利的动力条件。雷达上可见回波悬垂，有界弱回波区，中气旋，入流缺口等指示强风暴的特征，标志此次强对流发展十分旺盛，有利于强降水及冰雹的发生。另外卫星云顶黑体亮温(TBB)对短时强降水有很好的指示意义，降水量与TBB成很好的负相关关系，同时TBB梯度大值区对应降水大值站点，强降水出现在TBB突降之后，TBB突升之后降水趋于停止。

Abstract: The data of Doppler weather radar and FY-2F geostationary satellites, FNL and ECMWF reanalysis data are used to analyze the strong convective weather process in the background of a cold vortex in Shandong. The strong vertical airflow before the deep cold vortex, the strong vertical wind shear caused by the high-level jet and the ground convergence line provide a very favorable condition for the strong convective weather. Radar echo can also be found on the echo overhanging, bounded weak echo area, the cyclone, into the gap and other signs of strong storm echo characteristics; marking the strong convection development is very strong. Black-Body Temperature (TBB) has a good guiding significance for short-term heavy precipitation. The TBB gradient large area corresponds to the large precipitation site, and the heavy rainfall usually occurs after the TBB suddenly drops, and the precipitation stops after TBB rises.