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.
| Reference Key |
crichton2014geoscientifica
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|---|---|
| Authors | ;K. A. Crichton;D. M. Roche;G. Krinner;J. Chappellaz |
| Journal | international journal of quantum chemistry |
| Year | 2014 |
| DOI |
10.5194/gmd-7-3111-2014
|
| URL | |
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