利用CASA模型估算呼伦贝尔净第一性生产力

MODELING CHANGES OF NET PRIMARY PRODCTIVITY OF HULUN BUIR USING THE CASA MODEL

基于2000 ～2013年遥感与气象数据,通过对CASA（Carnegie-Ames-Stanford Approach）中的最大光能利用率的改进并模拟分析呼伦贝尔地区草地净第一生产力（NPP）及其时空变化特征,结果表明：NPP主要是受水热条件影响,呈现出地带性分布;年均NPP出现在2013年,呈现出逐年上升趋势.

Based on the remote sensing data and meteorological data from 2000 to 2013, maximum solar energy utilization efficiency was improved, the grassland net primary productivity （NPP） and its spatiotemporal distribu- tion in Hulun Buir were analyzed by CASA model. The results indicated that NPP was mainly affected by water and heat conditions, showing zonal distribution; the showing a rising trend year by year, the highest value in2013.