内蒙古草地NPP变化特征及其对气候变化敏感性的CENTURY模拟研究

被引:20
作者
郭灵辉 [1 ]
郝成元 [1 ]
吴绍洪 [2 ,3 ]
赵东升 [2 ,3 ]
高江波 [2 ,3 ]
机构
[1] 河南理工大学测绘与国土信息工程学院
[2] 中国科学院地理科学与资源研究所
[3] 中国科学院陆地表层格局与模拟重点实验室
关键词
气候变化; 草地; 净初级生产力(NPP); 敏感性; 内蒙古;
D O I
暂无
中图分类号
S812 [草地学、草原学];
学科分类号
090503 ; 0909 ;
摘要
气候变化及其对植被净初级生产力的影响是全球变化研究的核心内容之一。基于空间化的CENTURY生物过程模型,分析1981-2010年内蒙古草地净初级生产力(NPP)的时空演变规律及其对关键气候因子的敏感性特征。结果表明:近30年内蒙古草地大部分区域NPP呈下降态势但趋势并不显著,全区平均降速约为1.17 g C/m2?a;NPP年代际变化时空差异较大,1980s至1990s约69.65%的区域NPP下降,1990s至2000s NPP下降加剧,下降面积较前者扩大了17.50%;NPP对降水与温度的敏感性特征空间异质性较强,但总体上区域降水减少可能是近30年内蒙古草地NPP下降的主要因素,温度升高同样会导致草地NPP下降,但作用程度较小。
引用
收藏
页码:271 / 284
页数:14
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