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地理科学  2011 

中国陆地生态系统近30年NPP时空变化研究

, PP. 1409-1414

Keywords: NPP,CASA模型,中国陆地生态系统,气候因子,相关关系

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Abstract:

通过陆地生态系统碳循环模型(CASA模型),利用AVHRR的NDVI长期监测数据,逐像元模拟1981~2008年中国陆地生态系统NPP的时空变化,分析其对气候因子的响应关系。结果表明,中国陆地生态系统NPP总量在3.38~4.35PgC/a之间变化,平均约为3.8PgC/a,且研究期间呈上升趋势。在青藏高原、新疆天山地区和东北大小兴安岭、长白山等冷湿区,NPP年总累积量和年均温呈显著正相关,和年降水量呈显著负相关;地处华北的太行山、燕山等山区和内蒙古中部草原区等干燥环境区,NPP与年降水呈正相关关系;青藏高原及新疆地区和华北平原、四川盆地等农业区,NPP与年均温呈正相关关系。

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