Based on the sunshine data of 91 national meteorological stations and 14 cities forest coverage in Guangxi,the sufer spatial analysis technique and methods of the low-pass filtering and trend analysis,etc.are employed to research the sunshine characteristic and the relationship of sunshine and forest ecological environment.The results show that annual sunshine duration was 1 176～2 217 h and per-centage of sunshine was 27%～50%in all parts of Guangxi province.Annual sunshine duration variation was fluctuating downturn trend.Re-duction rate of annual average sunshine duration was 37.9 h/10 a.Sunshine duration was excessive period from 1960s to 1980s of the 20st century and in 2000s of the 21st century,that was less period in 1990s of the 20st century and 2010s of the 21st century.A significant season-al difference in sunshine duration was maximum in summer and minimum in winter.The maximum values of sunshine generally appeared in July-September,and the minimum values of those all appeared in February-March.The spatial distribution characteristic was higher in the south than in the north,and in valley and plain area was higher than in hilly and mountain area.The non-linear relationship between sun-shine duration and forest coverage shows dynamic changes,and the two influence ecological environment mutually.
关键词
日照时数/日照百分率/时空分布/森林覆盖率
Key words
sunshine duration/percentage of sunshine/spatial-temporal distribution/forest coverage
维普
万方数据