Joint assimilation of eddy covariance flux measurements and FAPAR products over temperate forests within a process-oriented biosphere model
C Bacour, P Peylin, N MacBean, PJ Rayner, F Delage, F Chevallier, M Weiss, J Demarty, D Santaren, F Baret, D Berveiller, E Dufrene, P Prunet
Journal of Geophysical Research Biogeosciences | AMER GEOPHYSICAL UNION | Published : 2015
We investigate the benefits of assimilating in situ and satellite data of the fraction of photosynthetically active radiation (FAPAR) relative to eddy covariance flux measurements for the optimization of parameters of the ORCHIDEE (Organizing Carbon and Hydrology in Dynamic Ecosystem) biosphere model. We focus on model parameters related to carbon fixation, respiration, and phenology. The study relies on two sites - Fontainebleau (deciduous broadleaf forest) and Puechabon (Mediterranean broadleaf evergreen forest) - where measurements of net carbon exchange (NEE) and latent heat (LE) fluxes are available at the same time as FAPAR products derived from ground measurements or derived from spac..View full abstract
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Awarded by European Space Agency under the CAMELIA project
Awarded by Australian Professorial fellowship
The authors are very grateful to Serge Rambal and Jean Marc Ourcival for providing the in situ flux and FAPAR measurements at Puechabon and to Jean-Yves Pontallier and Guerric le Maire for the data at Fontainebleau. The satellite data presented in this article are available from the authors on request. In situ measurements can be obtained upon request to the persons listed above. This study was partly financed by the European Space Agency under the CAMELIA project (20050/06/NL/HE). P.J. Rayner is in receipt of an Australian Professorial fellowship (DP1096309). The authors thank the computer team at LSCE for the computing support and resources. Finally, the author would like to thank two anonymous reviewers and the Editor (A. Desai) for their comments, questions, and suggestions, which significantly contributed to improve this paper.