Analysis of Temporal and Spatial Variation and Meteorological Elements of Guizhou Radiation Fog
According to the visibility and other observation data at 8 o' clock from 2008 to 2012,we selected 3646 radiation fog processes and divided them into four levels based on the visibility,then analyzed their spatial and temporal variations features.We also selected three meteorological observation stations (Xiuwen,Sansui and Fenggang) around the highway of Guizhou province where the radiation fog occur frequently,analyzed the meteorological elements features for different level of fog.The results show that:each level of radiation fog occur mostly between October and the following January,and more in the east while less in the west.The major distribution center of the 4th level fog are Xiuwen and Cengong,the distribution centers of the other levels radiation fog are Sansui,Fenggang,Pingtang,Zheng' an,Songtao and Jinping.The 4th level fog are more at Xiuwen station,have a significant correlation with the high average relative humidity,less than 3 m/s wind speed and the mainly east wind direction.At Sansui and Fenggang station,the average relative humidity and temperature difference between 08 on the day and 20 on the previous day are benificial to the fog formation,but the wind speed are low and vertical mixing are weak,so it is mainly lower level fog.
radiation fogtemporal and spatial variationmeteorological elements
NETL
NSTL
万方数据
维普
