藏北高原植被净初级生产力的遥感估算

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 成都山地所知识仓储（2009年以前）

	藏北高原植被净初级生产力的遥感估算
	鄢燕
	2009
会议名称	第七届成像光谱技术与应用研讨会
会议日期	2009-03-01
会议地点	广西桂林
关键词	CASA 净初级生产力 MODIS 藏北高原
中文摘要	用CASA模型、多时相MODIS遥感数据和地面气象数据相结合方法，考虑不同植被类型的最大光利用率的差异，对藏北高原2004年的植被净初级生产力(NPP)进行估算，分析了植被NPP时空分布特征。结果表明：(1)藏北高原的植被NPP估算结果与实测值是基本吻合的，效果较好，该遥感模型可以实现对藏北高原植被初级净生产力时空动态的快速诊断与准确评估。(2)藏北高原植被NPP空间分布格局表现出自东南向西北逐渐递减的趋势，与水热条件和植被类型的地带性分异规律是一致的。整个研究区植被NPP总量为31．19MtC．a-1，其中高寒草甸的NPP最大，占55．85％;其次为高寒草原，占26．6％。(3)藏北高原植被NPP具有显著的季相变化规律，全年中冬季(11～3月)的植被NPP值是非常低的，植被NPP累加值占全年NPP总量的3．2％;夏季(6～9月)植被NPP值是比较高的，植被NPP累加值占全年NPP总量的84％。
英文摘要	According to the differences in maximum light utiliazion efficiency(smax)among vegetation types，Carnegie—Ames—tanford Approach(CASA)model，multi·temporal MODIS data and ground meteorological data were used to estimate the Net Primary Productivity fNPP)of the terrestrial vegetation in Nakchu Prefecture．10cated in the North Plateau of Tibet,in 2004．The spatial pattern of the annual·accumulated NPP,the monthly dynamics of NPP in the North plateau of Tibet were illustrated and descript in detail．The results showed that：(1)the NPP model based on remote sensing(RS)technology can be more effectively and actually reflect the vegetation NPP in the North plateau of Tibet，the estimated NPP WaS consistent with the observed NPR(21 The spatial changes of NPP were remarkable．and it decreaSed from southeast toward northwest, correspond with the spatial differentiation of the hydrothermal conditions and vegetation types．The total annual NPP Nakchu Prefecture in 2004 was 3 1．19 Mt C．among which alpine meadow take up 55．85％of the total NPP,and alpine grasslands take up 26．6％of total NPP．Moreover’(3) seasonal changes of NPP were alSO large．nle NPP value was very low,toke uD 3．2％of tOtal annuaI NPP in winter(November to March)．but the NPPValBe was very huge in summer(June to September)，which toke up 84％of total annual NPP．
合作状况	其它
会议主办者	中国空间科学学会
语种	中文
内容类型	会议论文
源URL	[http://ir.imde.ac.cn/handle/131551/3038]
专题	成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
推荐引用方式 GB/T 7714	鄢燕. 藏北高原植被净初级生产力的遥感估算[C]. 见:第七届成像光谱技术与应用研讨会. 广西桂林. 2009-03-01.