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  Land contributions to natural CO2 variability on time scales of centuries

Schneck, R., Reick, C., & Raddatz, T. (2013). Land contributions to natural CO2 variability on time scales of centuries. Journal of Advances in Modeling Earth Systems, 5, 354-365. doi:10.1002/jame.20029.

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jame20029.pdf (Publisher version), 961KB
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©2013. American Geophysical Union. All Rights Reserved.
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 Creators:
Schneck, Rainer1, Author
Reick, Christian1, Author           
Raddatz, Thomas1, Author           
Affiliations:
1Global Vegetation Modelling, The Land in the Earth System, MPI for Meteorology, Max Planck Society, ou_913562              

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Free keywords: atmosphere-vegetation feedbacks; carbon cycle; CMIP5; vegetation modeling
 Abstract: The present paper addresses the origin of natural variability arising internally from the climate system of the global carbon cycle at centennial time scales. The investigation is based on the Max Planck Institute for Meteorology, Coupled Model Intercomparison Project Phase 5 (MPI-MCMIP5) preindustrial control simulations with the MPI Earth System Model in low resolution (MPI-ESM-LR) supplemented by additional simulations conducted for further analysis. The simulations show a distinct low-frequency component in the global terrestrial carbon content that induces atmospheric CO2 variations on centennial time scales of up to 3 ppm. The main drivers for these variations are low-frequency fluctuations in net primary production (NPP) of the land biosphere. The signal arises from small regions scattered across the whole globe with a pronounced source in North America. The main reason for the global NPP fluctuations is found in climatic changes leading to long-term variations in leaf area index, which largely determines the strength of photosynthetic carbon assimilation. The underlying climatic changes encompass several spatial diverse climatic alterations. For the particular case of North America, the carbon storage changes are (besides NPP) also dependent on soil respiration. This second mechanism is strongly connected to low-frequency variations in incoming shortwave radiation at the surface. ©2013. American Geophysical Union. All Rights Reserved.

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Language(s): eng - English
 Dates: 2012-0820132013-062013-06
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/jame.20029
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Title: Journal of Advances in Modeling Earth Systems
  Other : JAMES
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union
Pages: - Volume / Issue: 5 Sequence Number: - Start / End Page: 354 - 365 Identifier: Other: 1942-2466
CoNE: https://pure.mpg.de/cone/journals/resource/19422466