摘要
[Objective] The research aimed to study the influence of abrupt climate variation on the vegetation based on NDVI. [Method] Based on NDVI and climate data in China during 1982-2000, by using Mann-kendall (MK) abrupt change detection method, the abrupt variations of climate and NDVI were detected. Then, the relationship between two kinds of abrupt variations was discussed. [Result] The large-area abrupt variations of monthly average temperature and rainfall happened in 1983, and the occurrence range in 1999 was the smallest. The large-area abrupt variation phenomenon of vegetation appeared in 1983 and 1984. The occurrence times of NDVI abrupt variation phenomenon which was induced by the abrupt variation of temperature was more than that of precipitation. The abrupt variation of rainfall wasn’t one of main reasons for the occurrence of NDVI abrupt variation phenomenon. The small-area abrupt variation of temperature was difficult to generate the immediate influence on the vegetation activity in the short time. The abrupt variation phenomenon of large-scale temperature would generate the long-term influence on the vegetation activity. [Conclusion] The research provided the theory basis for analyzing the abrupt variation phenomenon of climate.
[Objective] The research aimed to study the influence of abrupt climate variation on the vegetation based on NDVI. [Method] Based on NDVI and climate data in China during 1982-2000, by using Mann-kendall (MK) abrupt change detection method, the abrupt variations of climate and NDVI were detected. Then, the relationship between two kinds of abrupt variations was discussed. [Result] The large-area abrupt variations of monthly average temperature and rainfall happened in 1983, and the occurrence range in 1999 was the smallest. The large-area abrupt variation phenomenon of vegetation appeared in 1983 and 1984. The occurrence times of NDVI abrupt variation phenomenon which was induced by the abrupt variation of temperature was more than that of precipitation. The abrupt variation of rainfall wasn’t one of main reasons for the occurrence of NDVI abrupt variation phenomenon. The small-area abrupt variation of temperature was difficult to generate the immediate influence on the vegetation activity in the short time. The abrupt variation phenomenon of large-scale temperature would generate the long-term influence on the vegetation activity. [Conclusion] The research provided the theory basis for analyzing the abrupt variation phenomenon of climate.
基金
Supported by Doctor Science Research Start Fund Item of Shandong University of Technology(2008KQ19)
