Variety Characteristic of Fogs on Hebei in Recent 40 Years
Weather data from 1960 to 1999 used to analyze the characteristics of spatial and temporal distribution of the fog in Hebei, changing rules of different time scales, variety trend and characteristics of visibility. The results showed that: there was a general upward trend of Hebei fog days, especially from the late 1980s, when Hebei went foggy; fog days mainly concentrated in winter, mostly in November and December; fogs of level 3 visibility were mostly often, and the reverse of level 1. generally speaking, the stations in foggy zone, fog had become a trend of a gradual increase hi level 1, while level 2 the opposite; in winter fog in foggy zone, generated after nightfall, dispersed around noon; continuous fog days generally appeared from November to February the next year. Fog in less fog zone lasted at a relatively short time, not more than 2-4 days; while in foggy zone lasted much longer, which may reach 5-11 days.
visibility spatial and temporal distribution variety chararistic
Zhao Yuguang Kang xiyan Li jiangbo Li Zongtao
Hebei Province Meteorological Observatory,Shijiazhuang,050021 Hebei Province Institute of Meteorological Science,Shijiazhuang,050021
国际会议
天津
英文
269-273
2007-07-17（万方平台首次上网日期，不代表论文的发表时间）