Analysis and Modeling of a Long-Lasting Fog Event over Beijing in February 2007

The evolution characteristics of a long-lasting fog event over Beijing during 20-22 February 2007 are investigated using the 5-min automatic visibility data and conventional meteorological observations.Data analysis results reveal that there is a close relationship between the development/evolution of this fog event and the weather conditions such as high humidity,light wind,and low temperature in the lower troposphere. Furthermore,numerical simulations of this event are carried out by using the Advanced Re...