关键词: 植被净初级生产量变化, 气候变化, 相关性, 内蒙古中部地区

Abstract: Based on AVHRR GLOPEM NPP dataset and climate data in the corresponding period, the authors analyzed the situation of the net primary production degradation in the central part of Inner-Mongolia and its correlation relationship with climate change during 1981-2000. The results show that: 1) from the eastern to the western part, the spatial distribution of net primary production had a descending tendency, and the inter-annual variation of net primary production in the whole area was apparent, especially during 1990-2000, and the variation rate could be due to 10.32gC/m²?a; 2) the inter-annual variation of net primary production had apparent spatial differentiation; 3) correlation coefficients between inter-annual variation of net primary production and inter-annual variations of climate factors had apparent spatial differentiations; 4) various vegetation types had various responses to climate change, and the inter-annual variation of precipitation had more significant impact on vegetation dynamics than the inter-annual variation of temperature in the study area. This study displays the situation of the net primary production degradation in the central part of Inner-Mongolia and the correlation ralationship between climate change and the net primary production degradation. Moreover, it will provide scientific references for the restoration and reconstruction of the degraded vegetation.

Key words: net primary production variations, climate change, correlation relationship, the central part of Inner-Mongolia