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An examination of the 'continental shelf pump' in an open ocean general circulation model

An examination of the 'continental shelf pump' in an open ocean general circulation model
An examination of the 'continental shelf pump' in an open ocean general circulation model
In a recent study of the shelf region of the East China Sea, Tsunogai et al. [1999] estimated that a combination of air-sea exchange and biological and physical transport processes could transfer carbon from the shelf region into the open ocean at a rate of 35 g Cm-2 yr-1. Contrasting with the solubility and biological pumps of the open ocean, they described this collective activity as the ‘‘continental shelf pump’’ and suggested that if this pump operated throughout the world’s shelf regions, it could be responsible for ocean uptake of ~1 Gt C yr-1 (~50% current ocean uptake of anthropogenic CO2). In this work a general circulation model (GCM) is used to explore the potential strength of this pump across the world’s shelves. Since the GCM does not represent the continental shelf regions explicitly, a parameterization of the pump has been used. Results of simulations find modeled pump activity very variable between shelf regions, with the East China Sea shelf behaving very similarly to the global average. Storage of pump carbon is particularly high in the Atlantic Ocean and other regions where deep water is formed. A considerable reservoir of pump carbon becomes trapped under the Arctic ice sheet. Simple extrapolations from the results suggest that should shelf regions absorb CO2 at the rate of the East China Sea, the pump would account for a net oceanic uptake of 0.6 Gt C yr-1.
general circulation model, east china sea, pacnwchi, carbon, pumps
0886-6236
831-844
Yool, Andrew
882aeb0d-dda0-405e-844c-65b68cce5017
Fasham, Michael J.R.
9532475b-8d95-4e45-b7ae-fcce34c5bb7a
Yool, Andrew
882aeb0d-dda0-405e-844c-65b68cce5017
Fasham, Michael J.R.
9532475b-8d95-4e45-b7ae-fcce34c5bb7a

Yool, Andrew and Fasham, Michael J.R. (2001) An examination of the 'continental shelf pump' in an open ocean general circulation model. Global Biogeochemical Cycles, 15 (4), 831-844.

Record type: Article

Abstract

In a recent study of the shelf region of the East China Sea, Tsunogai et al. [1999] estimated that a combination of air-sea exchange and biological and physical transport processes could transfer carbon from the shelf region into the open ocean at a rate of 35 g Cm-2 yr-1. Contrasting with the solubility and biological pumps of the open ocean, they described this collective activity as the ‘‘continental shelf pump’’ and suggested that if this pump operated throughout the world’s shelf regions, it could be responsible for ocean uptake of ~1 Gt C yr-1 (~50% current ocean uptake of anthropogenic CO2). In this work a general circulation model (GCM) is used to explore the potential strength of this pump across the world’s shelves. Since the GCM does not represent the continental shelf regions explicitly, a parameterization of the pump has been used. Results of simulations find modeled pump activity very variable between shelf regions, with the East China Sea shelf behaving very similarly to the global average. Storage of pump carbon is particularly high in the Atlantic Ocean and other regions where deep water is formed. A considerable reservoir of pump carbon becomes trapped under the Arctic ice sheet. Simple extrapolations from the results suggest that should shelf regions absorb CO2 at the rate of the East China Sea, the pump would account for a net oceanic uptake of 0.6 Gt C yr-1.

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More information

Published date: 2001
Additional Information: Paper number 2000GB001359
Keywords: general circulation model, east china sea, pacnwchi, carbon, pumps

Identifiers

Local EPrints ID: 6008
URI: http://eprints.soton.ac.uk/id/eprint/6008
ISSN: 0886-6236
PURE UUID: a017f53b-43f0-4674-93e8-21abf2d7d296

Catalogue record

Date deposited: 08 Jun 2004
Last modified: 08 Jan 2022 00:57

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Contributors

Author: Andrew Yool
Author: Michael J.R. Fasham

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