Circulation Pattern and Its Meteorological Element Distribution Feature of Fog in Fuzhou

Ncep reanalysis data,surface and high sound data from 1981 to 2005 were used to analyze the circulation pattern and meteorological element distribution feature of fog in Fuzhou.It was shown that the fog taken place in Fuzhou were mostly adjective fog and happen from December to June in the next year,especially in spring season.When fog occurred,there was a shear between Nanchang and Fuzhou in 850 hPa;in surface layer,the ground was in warm area with almost stationary wind;the air above surface was approaching to saturation with steady stratification and inversion layer.All of the above statistic results and synoptic pattern had done some fundamental job and gave great help to objectively forecast the occurrence of the fog in Fuzhou.