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当前位置: 首页 > 文章 > 陕西一次持续性大雾天气特征分析 安徽农业科学 2016 (2) 231-233
Position: Home > Articles > Weather Characteristics Analysis of a Continuously Heavy Fog Process in Shaanxi Province Journal of Anhui Agricultural Sciences 2016 (2) 231-233

陕西一次持续性大雾天气特征分析

作  者：
刘瑞芳;陈小婷;屈丽玮
单  位：
陕西省气象台
关键词：
大雾;环流形势;温湿条件;探空资料
摘  要：
利用常规探测资料、自动站资料,对陕西2007年11月12~16日大范围持续性大雾产生的天气背景、温湿条件和大气层结等特征进行分析。结果表明,前期500 h Pa陕西为西西北气流,地面为均压场控制,辐射降温有利于近地层水汽凝结成雾;后期陕西处于高压前部等压线较密集区,形成锋前雾;1~4 m/s的地面风速、低层弱的垂直速度是这次雾形成的动力条件;上干下湿的高低空配置是大雾发生的水汽条件;大气层结稳定,低层有逆温、稳定少动的暖盖,阻碍低层水汽向上扩散,有利于大雾发生。
译  名：
Weather Characteristics Analysis of a Continuously Heavy Fog Process in Shaanxi Province
作  者：
LIU Rui-fang;CHEN Xiao-ting;QU Li-wei;Shaanxi Meteorological Observatory;
关键词：
Dense fog;;Circulation pattern;;Temperature and humidity conditions;;Sounding data
摘  要：
Based on the conventionally observational data and automatic weather station data,the synoptic background,temperature and humidity conditions,atmospheric stratification feature of a wide area of continuously heavy fog event in Shaanxi Province during November 12- 17th2007 were analyzed. The main conclusions were as follows: the 500 h Pa circulation at mid-latitude was northwest flow,and the ground was controlled by the equal pressure filed,which were favorable for the radiation fog; late Shaanxi was in the isobar dense area of the high-pressure,which formed the front fog; 1- 4 m / s surface wind and weak vertical movement in lower level were the dynamical conditions of the fog weather;the configurations of big relative humidity at lower level and small relative humidity at middle level constituted water vapor condition of the fog;stable atmospheric stratification and the lower temperature inversion,hindered the low-level moisture diffusion upward,were conducive for the occurrence of the fog.

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