Fine Resolution Simulation of a Cold Vortex in Northeast China by Using a Meso-Scale Meteorological Model

Abstract

In this paper, a cold vortex of June 16-19, 2016 was simulated with fine resolution model (Climate-FDDA) to investigate the mechanism of precipitation and strong wind induced by a cold vortex in the Northeast Plain. The cold vortex process was reasonably captured by the fine resolution simulation. Due to the severe cyclonic circulation caused by the cold vortex process, water vapor was transported to the Northeast China Plain, providing a wealth of water vapor conditions. As the cold vortex is a deep convective synoptic system, unstable stratification and vigorous mixing action in the vertical direction could promote the occurrence of precipitation events over the region of northeast China. The cold vortex also lead the strong winds in the plain. During this case, the maximum surface wind speed reached 18m/s, which could be beneficial to the utilization of wind energy.