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How Does Ocean Ventilation Change Under Global Warming? : Volume 3, Issue 4 (11/07/2006)

By Gnanadesikan, A.

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Book Id: WPLBN0004020980
Format Type: PDF Article :
File Size: Pages 22
Reproduction Date: 2015

Title: How Does Ocean Ventilation Change Under Global Warming? : Volume 3, Issue 4 (11/07/2006)  
Author: Gnanadesikan, A.
Volume: Vol. 3, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Zeng, F., Russell, J. L., & Gnanadesikan, A. (2006). How Does Ocean Ventilation Change Under Global Warming? : Volume 3, Issue 4 (11/07/2006). Retrieved from

Description: NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, USA. Since the upper ocean takes up much of the heat added to the earth system by anthropogenic global warming, one would expect that global warming would lead to an increase in stratification and a decrease in the ventilation of the ocean interior. However, multiple simulations in global coupled climate models using an ideal age tracer which is set to zero in the mixed layer and ages at 1 yr/yr outside this layer show that the intermediate depths in the low latitudes become younger under global warming. This paper reconciles these apparently contradictory trends, showing that a decrease in upwelling of old water from below is responsible for the change. Implications for global biological cycling are considered.

How does ocean ventilation change under global warming?


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