摘要
利用呼和浩特本站1960—2009年共50年每天的地面常规气象观测资料,对出现雾、轻雾时的水平能见度、相对湿度、风速和风向等资料进行统计分析。得到:(1)呼和浩特市绝大部分雾出现在后半夜到上午,属辐射雾;(2)呼和浩特市50年来出现了192次轻雾,年均3.8次,出现了40次雾,年均0.8次,能见度在500m以下的雾出现了20次,年均0.4次;2000年以后,轻雾、雾总次数呈上升趋势;(3)出现轻雾最多的月份是3月,次多是10月,2月最少;总的来看,冬季和夏季出现次数较少,秋季和春季较多;(4)出现雾和轻雾时绝大部分当天或前一天有降水,相对湿度大于80%,风速小于2.0 m.s-1,大部分为静风或偏南风;(5)出现雾时影响了农作物生长,对交通运输业造成很大影响,对身体健康非常有害。
With the total 50 years＇ routine meteorological data of Hohhot station from 1960 to 2009,the horizontal visibility,relative humidity,wind speed,wind direction were analyzed by statistical method in fogs and mists.The results showed that the most of the fogs were radiation fogs which occurred from the late night to the next morning;there were 192 mists with the average value was 3.8 times and 40 fogs with the average value was 0.8 times in recent 50 years,the fogs with visibility below 500m appeared 20 times with average value 0.4 times;since 2000,mists and fogs occurred with increasing trend in the total number;the mists mostly occurred in March,secondly in October and the least in February at least.Generally,fogs and mists occurred less in the winter and the summer while they did more in the spring and the autumn;before the fog or mist,there were always precipitation with the relative humidity more than 80%,wind speed less than 2.0 m/ s-1and the calm wind or southerly wind;the harms of fog and mist affected the growth of crops,transportation industry and health.
出处
《内蒙古气象》
2011年第2期3-5,共3页
Meteorology Journal of Inner Mongolia
关键词
雾
分布特征
危害
fog
characteristic distribution
harm
