Comparison of Mechanisms for Low-Frequency Variability of Summer Arctic Sea Ice in Three Coupled Models
Comparison of Mechanisms for Low-Frequency Variability of Summer Arctic Sea Ice in Three Coupled Models
复制标题
三种耦合模式下夏季北极海冰低频变化机制比较
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
T. Knutson
中科院分区：
文献类型：
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作者：
Dawei Li;Rong‐Hua Zhang;T. Knutson
本文利用三个耦合模式(GFDL CM2.1、GFDL CM3和NCAR CESM)的长期控制模拟，分析了夏季北极海冰低频变化的机制。尽管北极海冰平均状态不同，但在所有三个模式中，夏季北极海冰低频变化对三个关键预报因子(进入北极和北极偶极子的大西洋和太平洋海洋热输送)的响应具有许多稳健的特征。在所有三个模式中，进入北极的大西洋(太平洋)热量输送的增强导致夏季北极海冰减少和表面变暖，特别是在北极的大西洋(太平洋)部分。北极偶极子的正位相导致夏季北极海冰在太平洋一侧减少和地表变暖，而在大西洋一侧则相反。北冰洋夏季海冰的北上热输送对夏季北极海冰的变化具有负反馈作用。伊夫鲁..。
AbstractIn this study the mechanisms for low-frequency variability of summer Arctic sea ice are analyzed using long control simulations from three coupled models (GFDL CM2.1, GFDL CM3, and NCAR CESM). Despite different Arctic sea ice mean states, there are many robust features in the response of low-frequency summer Arctic sea ice variability to the three key predictors (Atlantic and Pacific oceanic heat transport into the Arctic and the Arctic dipole) across all three models. In all three models, an enhanced Atlantic (Pacific) heat transport into the Arctic induces summer Arctic sea ice decline and surface warming, especially over the Atlantic (Pacific) sector of the Arctic. A positive phase of the Arctic dipole induces summer Arctic sea ice decline and surface warming on the Pacific side, and opposite changes on the Atlantic side. There is robust Bjerknes compensation at low frequency, so the northward atmospheric heat transport provides a negative feedback to summer Arctic sea ice variations. The influ...
影响因子：
6.7
作者：
Day, J. J.;Hargreaves, J. C.;Abe-Ouchi, A.
通讯作者：
Abe-Ouchi, A.