摘要
2005年2月17～18日，受冷空气和较强暖湿气流共同影响，青岛发生中到大雪降雪过程。对这次过程的环流背景和雷达资料进行综合分析表明，低空暖平流、垂直风切变和高空西风急流提供了有利的动力条件，中空西南气流和近地层从黄渤海海面的水汽输送提供了降水所需的水汽。随着2．0～2．7km高度上，一个以青岛为中心的中尺度气旋性风场的出现，降雪强度迅速达到最强，该风场破坏，降雪强度也迅速减弱；雷达回波首先出现在3．0～5．5km的高度上，然后向上下扩展加强；降雪初期，0．8～3．2km高度上有弱回波区。
Based on the meteorological observations and Doppler radar data, an analysis of a snow event at Qingdao City from 17 to 18, February, 2005 is made. It shows that the low- level warm advection, the vertical wind shear and the high-level jet provided favorable dynamic conditions for the event, the middle-level southwest air flow and the surface layer moisture from the Huanghai Sea and Bohai Sea provided the moisture conditions for the event. The intensity of the snowfall enhanced rapidly to the heaviest, as a meso-cyclone appeared over Qingdao at the 2.0-2.7km layer. And then, as the cyclonic wind field broke, the snowfall became weaker. The initial echo appeared at the 3.0-3.5km layer, and then, it extended downward and upward.
出处
《气象》
CSCD
北大核心
2006年第1期89-94,共6页
Meteorological Monthly
