文章基本信息

标题：INTER-ANNUAL VARIABILITY OF NET ECOSYSTEM PRODUCTIVITY OVER INDIA
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作者：R. K. Nayak ; K. V. Dadhwal ; N. R. Patel 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2011
卷号：XXXVIII - 8/W20
页码：125-128
DOI：10.5194/isprsarchives-XXXVIII-8-W20-125-2011
出版社：Copernicus Publications
摘要：The net ecosystem productivity (NEP) is the estimates of net carbon exchanges between the vegetation-soil system and the atmosphere. Estimates of NEP could play important role in defining a terrestrial ecosystem as a net source and sink of atmospheric CO₂. We model monthly NEP over India for past 26 years (1981–2006) by incorporating satellite observations of vegetation index together with other climatic parameters in to efficiency based terrestrial ecosystem model. Results depict large spatial and temporal variability of NEP over India. NEP climatology over India showed that this region sequestered annually 9.4 Tg C (at the rate of 2.54 gC m^-2) and hence appeared to be a net sink of atmospheric CO₂. Strength of the CO₂ sequestration over the country has been increased during the study period with average linear growth rate of 1.8 TgC yr^-2
关键词：CASA; net primary productivity; inter annual variability; remote sensing; carbon cycle; India