Articles | Volume 11, issue 1
https://doi.org/10.5194/gmd-11-283-2018
https://doi.org/10.5194/gmd-11-283-2018
Model description paper
 | 
22 Jan 2018
Model description paper |  | 22 Jan 2018

The CarbonTracker Data Assimilation System for CO2 and δ13C (CTDAS-C13 v1.0): retrieving information on land–atmosphere exchange processes

Ivar R. van der Velde, John B. Miller, Michiel K. van der Molen, Pieter P. Tans, Bruce H. Vaughn, James W. C. White, Kevin Schaefer, and Wouter Peters

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Cited articles

Alden, C. B., Miller, J. B., and White, J. W. C.: Can bottom-up ocean CO2 fluxes be reconciled with atmospheric 13C observations?, Tellus B, 62, 369–388, https://doi.org/10.1111/j.1600-0889.2010.00481.x, 2010.
Andres, R. J., Marland, G., Boden, T. A., and Bischof, S.: Carbon dioxide emissions from fossil fuel consumption and cement manufacture, 1751–1991, and an estimate of their isotopic composition and latitudinal distribution, in: The Carbon Cycle, edited by: Wigley, T. and Schimel, D., Cambridge University Press, Cambridge, UK,53–62, 2000.
Ball, J. T.: An analysis of stomatal conductance, Ph. D. thesis, Stanford University, Stanford, CA, US, 1988.
Ballantyne, A. P., Miller, J. B., and Tans, P. P.: Apparent seasonal cycle in isotopic discrimination of carbon in the atmosphere and biosphere due to vapor pressure deficit, Global Biogeochem. Cy., 24, GB3018, https://doi.org/10.1029/2009GB003623, 2010.
Basu, S., Miller, J. B., and Lehman, S.: Separation of biospheric and fossil fuel fluxes of CO2 by atmospheric inversion of CO2 and 14CO2 measurements: Observation System Simulations, Atmos. Chem. Phys., 16, 5665–5683, https://doi.org/10.5194/acp-16-5665-2016, 2016.
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Short summary
We explored an inverse modeling technique to interpret global atmospheric measurements of CO2 and the ratio of its stable carbon isotopes (δ13C). We detected the possible underestimation of drought stress in biosphere models after applying combined atmospheric CO2 and δ13C constraints. This study highlights the importance of improving the representation of the biosphere in carbon–climate models, in particular in a world where droughts become more extreme and more frequent.