【摘要】 利用贵港气象站1961～2010年地面观测资料,统计分析了贵港大雾天气的气候学特征,并讨论了08:00出现的大雾与相关气象要素之间的关系。结果表明,贵港站大雾多出现在夜间,09:00左右为大雾消散的高峰期;近50年来年平均大雾日数为2.2 d,一年中大雾主要出现在春季的3和4月;从年代趋势分析,贵港大雾日数在20世纪60～90年代差异较小,但在21世纪后开始快速增长,年代际间存在了很大的差异;当08:00气温为14～19℃、相对湿度>96%、风速0～2 m/s时,出现大雾的频率最高,当天或前一天出现0～0.5mm的降水时更有利于大雾的发生。更多还原

【Abstract】 Based on surface meteorological observation data of Guigang City during 1961-2010,the climatic characteristics of fog were analyzed by statistic,and the relationship between morning fog and related meteorological elements was discussed,the results showed that fog occurred mostly at night,the period of fog dissipation peak was around 09:00;Nearly 50 years,the annual average number of foggy days was 2.2 days,fog occurred mainly in March and April;The foggy days in the 20th century from the 1960s to the 1990s were little difference in the decadal,but in the 21st century,the number of foggy days increased rapidly.At 08:00,the relationship between fog and meteorological factors was that fog occurred when the temperature was 14-19 ℃,and the relative humidity was more than 96%,wind speed in the 0-2 m/s.The rainfall of that day or the day before was between 0-0.5 mm,more conducive to the occurrence of fog.更多还原