草地净初级生产力对气候变化的响应

The Response of Grassland Net Primary Productivity to Climate Change

气候因子和人为因素是引起草地初级生产力(Net Primary Productior,NPP)变化的两个主要因素。运用CASA模型和Arc map平台,并结合气象数据(温度、降水量和太阳辐射)对中国草地1980-2010近30年的草地NPP进行研究分析,结果表明我国上世纪80年代、90年代和2000年代,草地NPP与同期的温度、降水量和太阳辐射都呈正相关关系,降水量变化对草地NPP的影响大于气温和太阳辐射变化的影响。草地NPP的空间分布规律主要表现是从东南沿海地区向西北内陆地区依次递减。

Climatic factors and human factors are two main factors that caused by changes in grassland NPP.This paper was conducted to research and analyze Chinese the grassland NPP of the period from 1980-2010 using the platform of CASA model and Arc map platform,combining with meteorological data（temperature,precipitation and solar radiation）.The results showed that there was positive correlation between grassland NPP and temperature,precipitation and solar radiation in 1980,1990 and 2000s.The effect of precipitation changing on grassland NPP was larger than the effect of temperature on solar radiation changing.The spatial distribution of grassland NPP was descending gradually from the southeast coast to the northwest inland regions.