Analysis on Distribution Characteristics of Thunderstorm in Hohhot
Using the observational thunderstorm data of 9 weather stations in Hohhot from 1971 to 2007 years,the thunderstorm characteristics of Climate change and spatio-temporal distribution were analyzed by means of mathematical statistics and the analysis of wavelets.The results showed that the mean annual numbers of thunderstorm are 36.4 days,the annual-average thunderstorm days were the least in central region of Hohhot area and the most in the north and south region,the annual number of thunderstorm days has a undulate decreasing trend in departed 37 years,its value of decreasing days was about 1.435per decade.The seasonal variation of thunderstorm in Hohhot area was obvious.Throughout the year from May to September period for thunderstorms concentrated.The 73.5% thunderstorm appeared in June,July and August.The results from wavelets analysis showed that the long oscillation variation period of thunderstorm days was 12 years and 20 year,and the short period of thunderstorm days was 2、3 years、4 years,the long periods oscillation were the main characters.
NETL
NSTL
万方数据
维普
