关键词: 时空分布特征, 时空分布特征

Abstract: In order to guide the Guangxi region’s agricultural production more effectively, it needed to require further study the temporal and spatial variation of sunshine duration in Guangxi in recent years. The spatial and temporal variation characteristics of sunshine duration was analyzed by using GIS technique, climatic inclination rate and Mann-Kendall catastrophe test, based on the sunshine duration of 89 meteorological stations over Guangxi in recent 50 years. The results showed that: the Guangxi’s annual sunshine duration over Guangxi in recent 50 years had a decreasing trend, and the climate inclination rate of annual sunshine duration was -35.1 h/10 a. The sunshine duration in 1963 was the largest (1905.6 h), and the sunshine duration in 1997 was the least (1225.1 h), the sunshine duration in 1963 was more 680.5 h than the one in 1997. The abrupt change of annual sunshine duration occurred in 1975, and the sunshine duration reached a significant decreasing period which continued until 1997, then the sunshine duration had an increasing trend. The sunshine duration in different areas and period had differences with trend and range. Interdecadal change characteristic showed that: the sunshine duration had a decreasing trend from 1990s to 2000s and it had an increasing trend in most areas among other periods in recent 50 years. Interdecadal change of the sunshine duration had a regularity of change average every decade in eastern part of Guangxi areas and a few places among Xilin.