关键词: 天山山区, NPP, 气候生产力模型, 气候变化

Abstract: Based on the historical climate data of ten meteorological stations in 1961-2007 in Tianshan mountain areas,the annual average temperature,precipitation change tendency and the change characteristics were analyzed,by using methods of linear trend,Morlet wavelet and Mann-Kendall examination. The calculation of the net primary productivity (NPP) was based on the Miami model,Thornthwaite Memorial model,Chikugo model,Zhu Zhihui model and Zhou Guangsheng model separately. The responses of the NPP to climatic change were analyzed by the computation and the contrastive analysis. The results showed that the climate obviously had a warmer and wetter tendency in Tianshan mountain areas,in recent 47 years. The climate mutation from cold and dry to warm and wet occurred in 1970. Although there were some differences in the NPP based on various models,the response tendency of the spatial and temporal distribution of the NPP to climate change was the same. The NPP in Tianshan mountain areas obviously increased under the background of the climate change with warmer and wetter trend. The NPP mutation was in 1970 too. The NPP based on various models had a three to 22 years periodic change at the different time scales,which was completely consistent with changes of the annual average temperature and precipitation. Among all of the different pastures,the NNP in the meadow prairie and mountainous region meadow was the highest,while it was the lowest in the cold prairie,and it was between in the high and cold meadow,and the desert. Finally,the mutual conversion relations of NPP based on the various models were established.

Key words: Tianshan mountain areas, Tianshan mountain areas, NPP, Climate productivity model, Climate change