A simplified permafrost-carbon model for long-term climate studies with the CLIMBER-2 coupled earth system model
A simplified permafrost-carbon model for long-term climate studies with the CLIMBER-2 coupled earth system model
复制标题
使用 CLIMBER-2 耦合地球系统模型进行长期气候研究的简化永久冻土碳模型
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
J. Chappellaz
中科院分区：
文献类型：
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作者：
K. Crichton;D. Roche;G. Krinner;J. Chappellaz
抽象的。我们提出了一个简化的永冻碳机制的开发和验证与陆地表面计划运作的CLIMBER-2地球系统模型。简化模型根据一年中模拟的寒冷（低于0 °C）和温暖（高于0 °C）天之间的平衡来估计每个网格单元的永久冻土分数。被诊断为永久冻土的地区被指定为土壤分解率降低，从而形成一个缓慢积累的土壤碳库。在气候变暖的情况下，永久冻土范围减少，土壤分解率增加，导致土壤碳释放到大气中。四个积累/分解速率设置保留在CLIMBER-2（P）模型，这是调整，以同意今天和末次冰期最大的陆地碳储量总量的估计实验。这一冻土碳库的分布与土壤碳含量的测量数据基本一致。永久冻土-碳模型的复杂程度可与CLIMBER-2地球系统模型的其他组成部分相媲美。
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.
影响因子：
18.3
作者：
Ciais, P.;Tagliabue, A.;Piao, S. L.
通讯作者：
Piao, S. L.