Spatio-temporal Variation Analysis of Ecological Systems NPP in China in Past 30 years
In this paper,using terrestrial ecosystem carbon cycle model（CASA model） to possess the AVHRR NDVI long-term monitoring data,we simulated the spatio-temporal changes of the NPP of terrestrial ecosystems by pixel in China from 1981 to 2008,and analyzed the relationship between NPP and climate factors.The results show that the total NPP of terrestrial ecosystems of China varied between 3.38-4.35 Pg C/a,averaging about 3.8 Pg C/a,and there is a upward trend in 1981-2008.In the cold and wet areas such as Qinghai-Tibet Plateau,Tianshan Mountains and the northeastern region of Da and Xiao Hinggan Mountains and Changbai Mountain,the total accumulation NPP and annual average temperature have a significant positive correlation ship,and significantly negatively correlated with the annual precipitation.In the dry conditions,such as Taihang Mountains and Yanshan Mountains,located in the north of China,and the central Inner Mongolia grassland regions,NPP and annual precipitation are positively correlated.In Qinghai-Tibet Plateau,Xinjiang and the agricultural regions such as North China Plain,Sichuan Basin,there has a positive correlation between NPP and average annual temperature.
NETL
NSTL
万方数据
维普
