Stability of North Atlantic Deep Water Formation in a Global Ocean General Circulation Model

Power, S. B. and Moore, A. M. and Post, D. A. and Smith, N. R. and Kleeman, R. (1994) Stability of North Atlantic Deep Water Formation in a Global Ocean General Circulation Model. Journal of Physical Oceanography, 24 (5). pp. 904-916. ISSN 0022-3670


Abstract

A global ocean GCM is forced using mixed boundary conditions. Freshwater flux anomalies lasting 5 years are then applied over the western half of the subpolar gyre in the northern North Atlantic. The current climate is found to be stable to anomalies that have salt deficits equivalent to about seven times that estimated for the great salinity anomaly' of 1968-1982. Above this level the thermohaline circulation collapses to a state in which the zonally averaged overturning associated with North Atlantic Deep Water formation is only about half its original value, SSTs over the North Atlantic are lowered, and both the subpolar and subtropical gyres have weakened horizontal transports.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 07 Jan 2022 00:28
Last Modified: 07 Jan 2022 00:28
Uncontrolled Keywords: deep water formation; GCM; NADW; stability
Fields of Research (2008): 04 Earth Sciences > 0405 Oceanography > 040503 Physical Oceanography
Fields of Research (2020): 37 EARTH SCIENCES > 3702 Climate change science > 370202 Climatology
37 EARTH SCIENCES > 3708 Oceanography > 370803 Physical oceanography
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9603 Climate and Climate Change > 960310 Global Effects of Climate Change and Variability (excl. Australia, New Zealand, Antarctica and the South Pacific) ""
D Environment > 96 Environment > 9603 Climate and Climate Change > 960304 Climate Variability (excl. Social Impacts)
Socio-Economic Objectives (2020): 19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1905 Understanding climate change > 190502 Climate variability (excl. social impacts)
18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180506 Oceanic processes (excl. in the Antarctic and Southern Ocean)
Identification Number or DOI: https://doi.org/10.1175/1520-0485(1994)024<0904:SONADW>2.0.CO;2
URI: http://eprints.usq.edu.au/id/eprint/44916

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