Spatiotemporal Changes of Precipitation Across the Beijing-Tianjin-Hebei Region from 1973 to 2022
In order to clarify the spatiotemporal variation characteristics of precipitation across Beijing-Tianjin-Hebei region in recent years,the daily and monthly precipitation data in recent 50 years are processed and analyzed by using mathematical statistics,spatial interpolation and M-K significance analysis,combined with regional DEM data.The results show that the annual precipitation shows no significant increase trend,and there is a periodic change with an average period of about 20 years in the Beijing-Tianjin-Hebei region;The instability of annual precipitation is increasing,and the instability of precipitation in other seasons is increasing except in spring.Summer precipitation has the strongest correlation with annual precipitation.The annual precipitation is decreasing from the southeast coast to the northwest inland.The precipitation in spring,autumn and winter is characterized by more on both sides and lower in the middle,and the distribution characteristics of summer precipitation are consistent with those of annual precipitation.The annual precipitation in most areas shows an increasing trend,and the spatial distribution of the increase is opposite to that of the annual precipitation,and there is still the highest consistency between summer precipitation and annual precipitation.
spatiotemporal variation of precipitationspatial interpolationM-K significance testwavelet analysisBeijing-Tianjin-Hebei Region
国家科技期刊平台
NSTL
万方数据
