莱西市近20年雾日的统计分析

Statistical Analysis of Foggy Days in Laixi in Recent 20 Years

应用1997—2016年莱西国家气象观测站经过质量控制后的雾、能见度、温度、相对湿度等气象探测数据,分析近20年莱西市雾日的统计特征及变化规律。结果表明:1997—2016年期间,莱西市雾日数波动性十分明显,有较为明显的准2~3年周期震荡。全年来看,雾日数最多出现于秋季,冬季略低。莱西市雾持续1 d的天气过程最多,持续时间较长的雾天气过程主要在秋、冬季节,在冬季更为高发。雾日数与逐日平均气温及最高、最低呈显著负相关,日均相对湿度增至80%~89%区间时,雾日数所占比例达到峰值。

Using meteorological observation data such as fog,visibility,temperature,and relative humidity from the Laixi National Meteorological Observatory after quality control from 1997 to 2016,analyze the statistical characteristics and variation patterns of fog days in Laixi City in the past 20 years.The results showed that from 1997 to 2016,the fluctuation of fog days in Laixi City was very significant,with a relatively obvious quasi 2~3 year cycle fluctuation.Throughout the year,the highest number of foggy days occurs in autumn and slightly lower in winter.Laixi City has the most foggy weather processes lasting for 1day,with longer foggy weather processes mainly occurring in the autumn and winter seasons,with a higher incidence in winter.The number of foggy days was significantly negatively correlated with the daily average temperature,as well as the highest and lowest.When the daily average relative humidity increases to the range of 80% to 89%,the probability of foggy days reaching its peak.