Articles | Volume 10, issue 7
https://doi.org/10.5194/gmd-10-2635-2017
https://doi.org/10.5194/gmd-10-2635-2017
Development and technical paper
 | 
10 Jul 2017
Development and technical paper |  | 10 Jul 2017

Constraining DALECv2 using multiple data streams and ecological constraints: analysis and application

Sylvain Delahaies, Ian Roulstone, and Nancy Nichols

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Cited articles

Bloom, A. A. and Williams, M.: Constraining ecosystem carbon dynamics in a data-limited world: integrating ecological “common sense” in a model-data fusion framework, Biogeosciences, 12, 1299–1315, https://doi.org/10.5194/bg-12-1299-2015, 2015.
Chuter, A. M., Aston, P. J., Skeldon, A. C., and Roulstone, I.: A dynamical systems analysis of the data assimilation linked ecosystem carbon (DALEC) models, Chaos, 25, 036401, https://doi.org/10.1063/1.4897912, 2015.
Fox, A., Williams, M., Richardson, A. D., Cameron, D., Gove, J. H., Quaife, T., Ricciuto, D., Reichstein, M., Tomelleri, E., Trudinger, C. M., and Van Wijk, M. T.: The REFLEX project: Comparing different algorithms and implementations for the inversion of a terrestrial ecosystem model against eddy covariance data, Agr. Forest Meteorol., 149, 1597–1615, https://doi.org/10.1016/j.agrformet.2009.05.002, 2009.
Giering, R. and Kaminski, T.: Recipes for Adjoint Code Construction, ACM Trans. Math. Softw., 24, 437–474, https://doi.org/10.1145/293686.293695, 1998.
Golub, G. H. and Van Loan, C. F.: Matrix Computations, 3rd Edn., Johns Hopkins University Press, Baltimore, MD, USA, 1996.
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Short summary
Carbon is a fundamental constituent of life and understanding its global cycle is a key challenge for the modelling of the Earth system. We use a variational method to estimate parameters and initial conditions for the carbon cycle model DALECv2 using multiple sources of observations. We develop a methodology that helps understanding the nature of the inverse problem and evaluating solution strategies, then we demonstrate the efficiency of the variational method in an experiment using real data.
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