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A global diagnostic of interior ocean ventilation

A global diagnostic of interior ocean ventilation
A global diagnostic of interior ocean ventilation
Ventilation is the process by which water is transferred from the surface mixed layer to the interior ocean. Ventilation anomalies as the result of climate variability may impact the atmosphere in remote regions where the flow returns to the mixed layer. From the Lagrangian analysis of monthly-mean ocean fields of a numerical model constrained by observed climatologies, we show that 324 Sv of mixed layer water travel throughout the interior ocean for periods longer than 12 months, leading to an average volume replacement time of roughly 125 yr. We evaluate the connections established on a global scale, with an appropriate mapping of the ventilation and corresponding obduction regions, and highlight the role of the Antarctic Circumpolar Current as a main receptacle of the water masses formed throughout the world ocean.
0094-8276
art. 1267
Blanke, Bruno
b223bcd4-5fcf-4d9b-bf36-f21675932e14
Speich, Sabrina
b96aaa4e-9c98-4598-b29e-59efc8edff51
Madec, Gurvan
ffb28deb-4bbd-4a4c-914f-492f813e4864
Maugé, Rudy
a4e98e09-83a1-408d-9516-543f3e75d9aa
Blanke, Bruno
b223bcd4-5fcf-4d9b-bf36-f21675932e14
Speich, Sabrina
b96aaa4e-9c98-4598-b29e-59efc8edff51
Madec, Gurvan
ffb28deb-4bbd-4a4c-914f-492f813e4864
Maugé, Rudy
a4e98e09-83a1-408d-9516-543f3e75d9aa

Blanke, Bruno, Speich, Sabrina, Madec, Gurvan and Maugé, Rudy (2002) A global diagnostic of interior ocean ventilation. Geophysical Research Letters, 29 (8), art. 1267. (doi:10.1029/2001GL013727).

Record type: Article

Abstract

Ventilation is the process by which water is transferred from the surface mixed layer to the interior ocean. Ventilation anomalies as the result of climate variability may impact the atmosphere in remote regions where the flow returns to the mixed layer. From the Lagrangian analysis of monthly-mean ocean fields of a numerical model constrained by observed climatologies, we show that 324 Sv of mixed layer water travel throughout the interior ocean for periods longer than 12 months, leading to an average volume replacement time of roughly 125 yr. We evaluate the connections established on a global scale, with an appropriate mapping of the ventilation and corresponding obduction regions, and highlight the role of the Antarctic Circumpolar Current as a main receptacle of the water masses formed throughout the world ocean.

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Published date: 30 April 2002
Organisations: National Oceanography Centre,Southampton

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Local EPrints ID: 64814
URI: http://eprints.soton.ac.uk/id/eprint/64814
ISSN: 0094-8276
PURE UUID: 93e5c65f-5e0d-4d46-afb7-cd2973be4ade

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Date deposited: 15 Jan 2009
Last modified: 13 Mar 2019 20:20

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Contributors

Author: Bruno Blanke
Author: Sabrina Speich
Author: Gurvan Madec
Author: Rudy Maugé

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