An intimate coupling of ocean–atmospheric interaction over the extratropical North Atlantic and Pacific |
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Authors: | Chun Li Lixin Wu Qi Wang Liwei Qu Liping Zhang |
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Institution: | (1) Physical Oceanography Laboratory, Ocean University of China, 5 Yushan Road, Qingdao, 266003, China |
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Abstract: | The inter-basin teleconnection between the North Atlantic and the North Pacific ocean–atmosphere interaction is studied using
a coupled ocean–atmosphere general circulation model. In the model, an idealized oceanic temperature anomaly is initiated
over the Kuroshio and the Gulf Stream extension region to track the coupled evolution of ocean and atmosphere interaction,
respectively. The experiments explicitly demonstrate that both the North Pacific and the North Atlantic ocean–atmosphere interactions
are intimately coupled through an inter-basin atmospheric teleconnection. This fast inter-basin communication can transmit
oceanic variability between the North Atlantic and the North Pacific through local ocean-to-atmosphere feedbacks. The leading
mode of the extratropical atmospheric internal variability plays a dominant role in shaping the hemispheric-scale response
forced by oceanic variability over the North Atlantic and Pacific. Modeling results also suggest that a century (two centuries)
long observations are necessary for the detection of Pacific response to Atlantic forcings (Atlantic response to Pacific forcing). |
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Keywords: | Midlatitude air– sea coupling Inter-basin teleconnection |
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