Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXVIII-8/W20, 125-128, 2011
https://doi.org/10.5194/isprsarchives-XXXVIII-8-W20-125-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
31 Aug 2012
INTER-ANNUAL VARIABILITY OF NET ECOSYSTEM PRODUCTIVITY OVER INDIA
R. K. Nayak1, K. V. Dadhwal1, N. R. Patel2, and C. B. S. Dutt1 1National Remote Sensing Center, Hyderabad, India
2Indian Institute of Remote Sensing, Dehradun, India
Keywords: CASA, net primary productivity, inter annual variability, remote sensing, carbon cycle, India Abstract. 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
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Citation: Nayak, R. K., Dadhwal, K. V., Patel, N. R., and Dutt, C. B. S.: INTER-ANNUAL VARIABILITY OF NET ECOSYSTEM PRODUCTIVITY OVER INDIA, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XXXVIII-8/W20, 125-128, https://doi.org/10.5194/isprsarchives-XXXVIII-8-W20-125-2011, 2011.

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