摘要
通过对郑州市区1951-2008年的沙尘天气气候演变特征及形成原因进行分析,结果发现:从长期变化趋势来看,郑州市沙尘天气主要集中出现在20世纪50-70年代的冬、春季,80年代趋于减少,90年代最少,90年代末至21世纪趋于增加,2003年以后明显减少;郑州市沙尘天气的风来自各个方位,但主要集中在东东北、东北、西北、西西北方向,其中以东北风最多,三种沙尘天气(沙尘暴、扬沙、浮尘)主导风向差别较大;郑州市地形分布、土壤特性、生态环境的季节性变化以及城市中扬尘污染是郑州沙尘天气形成的几个主要因素。
The evolvement characteristics and cause of dust weather occurred in Zhengzhou urban district from 1951 to 2008 were analyzed. The results showed that dust weather often took place in spring and winter from 1950s to 1970s, it reduced apparently since late 1980s, and was least in 1990s, then increased in the last 1990s, thereafter it lessened obviously since 2003. The winds of Zhengzhou dust weather mainly come from NNE, NE, NW and WNW direction, among these NE is the most frequent, the leading wind direction of the three kinds of dust weather （ duststorm, blowing sand, floating dust） was different. The terrain distribution, soil characteristic, ecological environment varying with the seasons and blowing dust pollution in the city induce the dust weather in Zhengzhou.
出处
《气象与环境科学》
2009年第B09期159-161,共3页
Meteorological and Environmental Sciences
关键词
沙尘暴
扬沙
浮尘
气候演变
duststorm
blowing sand
floating dust
climatic evolution
