Spatio-temporal Characteristics of Fog and Wind in Dongting Lake
To prevent and mitigate a variety of shipping traffic accidents caused by meteorological disasters,we analyzed the spatio-temporal change of fog and wind and driving factors by using the materials from 18 meteorological stations in the Dongting Lake area during 1960-2014.The results showed that:in nearly 55 years,thick fog days were significantly reduced,mist days were significantly increased,gale days and the average wind speed were both significantly reduced;thick fog days increased from north to south and decreased from the surrounding of horseshoe-shaped mountains to the middle of lakeside;two high-value centers of mist days appeared in the northwest and the south,and the tongue-shaped distribution of low-value zone was from the east to the southwest;gale days and the average wind speed were opposite basically to the distribution of fog;thick fog days in northwest-center-southeast had a changing trend of "decrease-increase-decrease";mist days in most stations were significantly increased,but the regional increase range was not obvious;gale days in all stations were significantly reduced,the decrease range of high-value zone was located around the water body of Dongting Lake and low-value zone was located in the south;the average wind speed of most stations was significantly decreased,and the decrease range of high-value zone was located basically around the water body of Dongting Lake;the heating effect of the water body,climate warming and drying and human activities were important driving factors influencing the spatio-temporal characteristics and change of fog and wind.
fogwindvariation characteristicsDongting Lake area
NETL
NSTL
万方数据
维普
