a simplified permafrost-carbon model for long-term climate studies with the climber-2 coupled earth system model

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ID: 243188
2014
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Abstract
We present the development and validation of a simplified permafrost-carbon mechanism for use with the land surface scheme operating in the CLIMBER-2 earth system model. The simplified model estimates the permafrost fraction of each grid cell according to the balance between modelled cold (below 0 °C) and warm (above 0 °C) days in a year. Areas diagnosed as permafrost are assigned a reduction in soil decomposition rate, thus creating a slow accumulating soil carbon pool. In warming climates, permafrost extent reduces and soil decomposition rates increase, resulting in soil carbon release to the atmosphere. Four accumulation/decomposition rate settings are retained for experiments within the CLIMBER-2(P) model, which are tuned to agree with estimates of total land carbon stocks today and at the last glacial maximum. The distribution of this permafrost-carbon pool is in broad agreement with measurement data for soil carbon content. The level of complexity of the permafrost-carbon model is comparable to other components in the CLIMBER-2 earth system model.
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crichton2014geoscientifica Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors K. A. Crichton, D. M. Roche, G. Krinner, J. Chappellaz
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Journal international journal of quantum chemistry
Year 2014
DOI
10.5194/gmd-7-3111-2014
URL
http://www.geosci-model-dev.net/7/3111/2014/gmd-7-3111-2014.pdf
Keywords
geology

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