Climate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere‐ocean general circulation model
Climate response to volcanic forcing: Validation of climate sensitivity of a coupled atmosphere‐ocean general circulation model
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火山强迫的气候响应：大气-海洋耦合大气环流模型的气候敏感性验证
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Kimoto
中科院分区：
文献类型：
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作者：
T. Yokohata;S. Emori;T. Nozawa;Y. Tsushima;T. Ogura;M. Kimoto
对皮纳图博火山爆发后全球变冷的两个不同气候敏感度的海气耦合环流模式（GCM）进行了试验，以研究高气候敏感度模式的有效性。较高敏感度的版本，气候敏感度为6.3 K，CO2强迫加倍，高估了火山爆发造成的冷却，而较低敏感度的版本（4.0 K）产生的结果与观测结果一致。设计了一个简单的气候反馈分析方案，发现两个版本之间的差异归因于云反馈。预计这种验证方法将对气候敏感性提供更多的限制，并可能减少气候预测的不确定性。
Two versions of a coupled atmosphere‐ocean general circulation model (GCM) with different climate sensitivities are tested on global cooling following the Pinatubo volcanic eruption to investigate the validity of high climate sensitivities. The higher‐sensitivity version, with climate sensitivity of 6.3 K for doubled CO2 forcing, overestimates cooling due to the volcanic eruption, whereas the lower‐sensitivity version (4.0 K) produces results consistent with observations. A simple scheme for climate feedback analysis is devised and it is found that the difference between the two versions is attributed to cloud‐albedo feedback. This validation method is expected to provide additional constraints on climate sensitivity and possibly lead to reduced uncertainties in climate prediction.