[Objective] The study aimed to discuss the characteristics and forecasting methods of dense fog in Xuzhou City. [Method] Based on the data of dense fog in Xuzhou City from 1960 to 2009, the characteristics and forming...[Objective] The study aimed to discuss the characteristics and forecasting methods of dense fog in Xuzhou City. [Method] Based on the data of dense fog in Xuzhou City from 1960 to 2009, the characteristics and forming conditions of dense fog in the region were analyzed, and then its forecasting methods were introduced, finally corresponding disaster prevention measures were put forward. [ Result] Dense fog might ap- pear in each season, its frequency of occurrence was the highest in December, namely 16.4% ; it was the lowest in June （2.2%）, and the fog las- ted for a short time and was thin. Heavy fog occurred more frequently in winter half year than summer half year, and the frequency of occurrence from October to next February was about 66.7%. In addition, dense fog mostly generated from late midnight to morning, while it appeared less in the afternoon. It shows that dense fog in Xuzhou City is mainly radiation fog instead of advection fog, but the two kinds of fog appeared simultane- ously sometimes. [ Conclusion] The research could provide scientific forecasting methods for the precise prediction of dense fog in Xuzhou City.展开更多
基金Supported by Special Fund for Forecasters of Jiangsu Provincial Meteorological Bureau (Study on the Forecasting Model of Dense Fog in Xuzhou City Based on SVM Method)
文摘[Objective] The study aimed to discuss the characteristics and forecasting methods of dense fog in Xuzhou City. [Method] Based on the data of dense fog in Xuzhou City from 1960 to 2009, the characteristics and forming conditions of dense fog in the region were analyzed, and then its forecasting methods were introduced, finally corresponding disaster prevention measures were put forward. [ Result] Dense fog might ap- pear in each season, its frequency of occurrence was the highest in December, namely 16.4% ; it was the lowest in June （2.2%）, and the fog las- ted for a short time and was thin. Heavy fog occurred more frequently in winter half year than summer half year, and the frequency of occurrence from October to next February was about 66.7%. In addition, dense fog mostly generated from late midnight to morning, while it appeared less in the afternoon. It shows that dense fog in Xuzhou City is mainly radiation fog instead of advection fog, but the two kinds of fog appeared simultane- ously sometimes. [ Conclusion] The research could provide scientific forecasting methods for the precise prediction of dense fog in Xuzhou City.
