草地植被净第一性生产力及固碳释氧量的估算  

Estimation of NPP and fitting CO_2 and releasing O_2 of vegetation

作　　者：徐茜[1] 王晓峰[2] 任志远[1] 李晶[1] 

机构地区：[1]陕西师范大学旅游与环境学院,西安710062 [2]长安大学资源学院,西安710054

出　　处：《测绘科学》2012年第5期132-134,144,共4页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41001388;41071057;41040011)

摘　　要：草地植被净第一性生产力表征了草地生态系统的物质量,是评价草地生态系统物质生产能力的重要指标。本文基于ERDAS和ArcMap软件平台,由1990、2000和2007年ETM+影像数据提取出NDVI值,结合相应时段的气候数据,对陕北农牧交错带草地生态系统净第一性生产力及固碳释氧量进行测算,研究并分析了1990-2007年间其NPP及固碳释氧量的时空变化特征。Grass NPP characters the physical quantity of grass ecosystem. It is the most important indicator when evaluating the material production capacity of grass ecological system. Based on ERDAS and ArcMap software platforms, the study estimated NPP and fitting CO2 and releasing O2 based on NDVI which were extracted from remote sensing data （ETM ＋ ） in 1990s, 2000s, 2007s and the relevant climate data in the farming-pastoral ecotone in North Shaanxi Province. Temporal and spatial dynamics change of NPP and fitting CO2 and releasing O2 were studied and analyzedfrom 1990a to 2007a as well.

关 键 词：陕北农牧交错带 NDVI 光能利用率模型 NPP 固碳释氧量 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P23[天文地球—测绘科学与技术]