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Cited by 370

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Two decades of terrestrial carbon fluxes from a carbon cycle data assimilation system (CCDAS)

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Rayner, P. J., Scholze, M., Knorr, W., Kaminski, T., Giering, R., Widmann, H.·2005·Global Biogeochemical Cycles

Abstract

This paper presents the space‐time distribution of terrestrial carbon fluxes for the period 1979–1999 generated by a terrestrial carbon cycle data assimilation system (CCDAS). CCDAS is based around the Biosphere Energy Transfer Hydrology model. We assimilate satellite observations of photosynthetically active radiation and atmospheric CO 2 concentration observations in a two‐step process. The control variables for the assimilation are the parameters of the carbon cycle model. The optimized model produces a moderate fit to the seasonal cycle of atmospheric CO 2 concentration and a good fit to its interannual variability. Long‐term mean fluxes show large uptakes over the northern midlatitudes and uptakes over tropical continents partly offsetting the prescribed efflux due to land use change. Interannual variability is dominated by the tropics. On interannual timescales the controlling process is net primary productivity (NPP) while for decadal changes the main driver is changes in soil respiration. An adjoint sensitivity analysis reveals that uncertainty in long‐term storage efficiency of soil carbon is the largest contributor to uncertainty in net flux.

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Metadata

Authors
Rayner, P. J., Scholze, M., Knorr, W., Kaminski, T., Giering, R., & Widmann, H.
Venue
Global Biogeochemical Cycles
Published
2005-06
Volume
19
Issue
2
ISSN
  • 0886-6236 (ISSN-L)
  • 1944-9224
OpenAlex
W2142634863
Cited by
370
References
3
FWCI
15.36
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Two decades of terrestrial carbon fluxes from a carbon cycle data assimilation system (CCDAS). https://app.cochat.ai/papers/10.1029/2004gb002254
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Rayner, P. J., Scholze, M., Knorr, W., Kaminski, T., Giering, R., & Widmann, H. (2005). Two decades of terrestrial carbon fluxes from a carbon cycle data assimilation system (CCDAS). Global Biogeochemical Cycles. https://doi.org/10.1029/2004gb002254

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.