Water exchange between the subpolar and subtropical North Pacific in an OGCM |
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Authors: | Sun?Fengying Kim?Kim Email author" target="_blank">Huang?BoyinEmail author Wang?Dongxiao |
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Institution: | 1. University of Wisconsin-Madison, 1225 Dayton St., Madison, WI-53706, USA 2. Laboratory for Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China |
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Abstract: | The water exchange between the subpolar and subtropical gyres of the North Pacific is demonstrated by the simulation of chlorofluorocarbon
(CFC) using an ocean general circulation model. The simulated CFC concentration in the North Pacific is in good agreement
with observations. The water exchange is clearly illustrated by the tongues of CFC concentration. The subpolar waters with
high CFC are transported southward into the eastern subtropical gyre, whereas the subtropical waters with low CFC are transported
northward into the western subpolar gyre. The simulated exchange transport along 42°N in the layer of σθ < 26.8 indicates
that the northward mass transport is about 15 Sv (1 Sv = 106 m3 • s ) west of 165°E, and about 5 Sv between 175°W and 150°W. The southward mass transport is about 5 Sv between 165°E and
175°W, and about 2 Sv east of 150°W. |
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Keywords: | water exchange CFC concentration North Pacific |
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