The Role of Oceanic Feedback in the Climate Response to Doubling CO2
The Role of Oceanic Feedback in the Climate Response to Doubling CO2
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DOI：
10.1175/jcli-d-11-00712.1
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发表时间：
2012-11
影响因子：
4.9
通讯作者：
Jian Lu;Bin Zhao
中科院分区：
文献类型：
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作者：
Jian Lu;Bin Zhao
摘要：利用 CCSM3 的上层海洋动力学版本 (UOM) 设计了两套部分耦合实验，以隔离风驱动海洋环流和海气热通量变化反馈对全球气候对二氧化碳加倍强迫的响应的影响。部分耦合是通过实施所谓的覆盖技术来实现的，该技术有助于定量地将完全耦合模型中的总响应划分为所讨论的反馈分量以及在没有前者的情况下对外部强迫的响应。通过蒸发的体积公式来推翻海洋所见的风应力和风速，实验有助于揭示：（i）风-蒸发-海温（WES）反馈是CO2强迫下热带海温格局的主要形成机制，验证了Xie等人提出的假设； (ii) UOM 模型显示热带太平洋风减弱并不是导致赤道太平洋变暖增强的原因...
AbstractTwo suites of partial coupling experiments are devised with the upper-ocean dynamics version (UOM) of the CCSM3 to isolate the effects of the feedbacks from the change of the wind-driven ocean circulation and air–sea heat flux in the global climate response to the forcing of doubling CO2. The partial coupling is achieved by implementing a so-called overriding technique, which helps quantitatively partition the total response in the fully coupled model to the feedback component in question and the response to external forcing in the absence of the former. By overriding the wind stress seen by the ocean and the wind speed through the bulk formula for evaporation, the experiments help to reveal that (i) the wind–evaporation–SST (WES) feedback is the main formation mechanism for the tropical SST pattern under the CO2 forcing, verifying the hypothesis proposed by Xie et al.; (ii) the weakened tropical Pacific wind is shown in this UOM model not to be the cause for the enhanced equatorial Pacific warmin...