Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Estimation of Net Primary Productivity in the Northern Tibet Plateau by Using Remote Sensing

LU Yuan et al(Faculty of Resources and Environmental Sciences,Guangxi Teachers College,Nanning,Guangxi 530001)  
According to the differences in maximum light utiliazion efficiency(εmax) among vegetation types,Carnegie-Ames-Stanford approach(CASA) model,multi-temporal MODIS data and ground meteorological data were used to estimate the net primary productivity(NPP) of the terrestrial vegetation in Nakchu Prefecture,located 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 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 NPP.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 31.19 Mt C,among which alpine meadow took up 55.85% of the total NPP,and alpine grasslands take up 26.6% of total NPP.Moreover,seasonal changes of NPP were also large.NPP value was very low,being 3.2% of total annual NPP in winter(November to March),but the NPP value was very huge in summer(June to September),which took up 84.0% of total annual NPP.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved