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Coupling of Eastern and Western Subpolar North Atlantic: Salt Transport in the Irminger Current : Volume 10, Issue 2 (15/03/2013)

By Born, A.

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Book Id: WPLBN0004020754
Format Type: PDF Article :
File Size: Pages 25
Reproduction Date: 2015

Title: Coupling of Eastern and Western Subpolar North Atlantic: Salt Transport in the Irminger Current : Volume 10, Issue 2 (15/03/2013)  
Author: Born, A.
Volume: Vol. 10, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Stocker, T. F., Sandø, A. B., & Born, A. (2013). Coupling of Eastern and Western Subpolar North Atlantic: Salt Transport in the Irminger Current : Volume 10, Issue 2 (15/03/2013). Retrieved from

Description: Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland. Salt transport in the Irminger Current and thus the coupling between eastern and western subpolar North Atlantic plays an important role for climate variability across a wide range of time scales. High-resolution ocean modeling and observations indicate that salinities in the eastern subpolar North Atlantic decrease with enhanced circulation of the North Atlantic subpolar gyre (SPG). This has led to the perception that a stronger SPG also transports less salt westward. In this study, we analyze a regional ocean model and a comprehensive global coupled climate model, and show that a stronger SPG transports more salt in the Irminger Current irrespective of lower salinities in its source region. The additional salt converges in the Labrador Sea and the Irminger Basin by eddy transports, increases surface salinity in the western SPG, and favors more intense deep convection. This is part of a positive feedback mechanism with potentially large implications for climate variability and predictability.

Coupling of eastern and western subpolar North Atlantic: salt transport in the Irminger Current

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