昌吉雾的统计特征

Statistic Characteristics of Fog in Changji

利用昌吉州8站1971—2007年37a的地面观测资料,对该地区雾的气候特征以及气象条件进行了分析。结果表明,该地区雾存在中东部多西部少的分布特征;其季节变化和日变化明显,每年11月至翌年3月9—12时是雾的多发时段;温度、相对湿度、风速和风向等气象要素对昌吉雾的预报具有较好的指示意义。温度在-6～-20℃、相对湿度在78%～92%、风速在0～4m/s范围里且在偏西风和偏南风情况下,雾频率最高。

Using the data of ground-based observatories of 8 sites in Changji from 1971 to 2007 （37 years）, we analyze the climate characteristics of fog and its weather conditions in this area. The results show that the distributed characteristics of fog is eastern more than western, its seasonal change and daily change is very obvious, it occurred frequently during 9-12 a.m. for daily and in Nov. each year to next Mar., temperature, relative humidity, wind speed and direction, etc meteorological elements have good indicative significance for the fog forecast in Changji. If the meteorological conditions are as follows：temperature is -6-20℃ ,relative humidity is 78%-92%, wind speed is 0-4 m / s and wind direction leans to west and south, there is the highest frequency of fog.