Spatio Temporal Distribution of Weather Phenomena in China
The average frequency, characteristics of circadian distribution, representative weather events of 34 kinds of weather phenomena and the observed weather phenomena at regional representative stations are analyzed by using the observation data from 576 stations during 1961-2010. The results show that rain, dew, freezing, shower, mist and frost have higher annual average frequency, while polar lights, tornado and snowstorm etc. do not occur very often. In recent years, the occurrence of fog is in a slowly decreasing trend but mist increases gradually. Haze has become more since 2000 and the hit area is enlarged more and more. The occurrence of weather events has regional characteristics, but the top 20 types in different areas are similar, only the rank of the frequency is different.