Multiple Equilibria in a Global Ocean General Circulation Model
Article
Article Title | Multiple Equilibria in a Global Ocean General Circulation Model |
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ERA Journal ID | 1927 |
Article Category | Article |
Authors | Power, S. B. (Author) and Kleeman, R. (Author) |
Journal Title | Journal of Physical Oceanography |
Journal Citation | 23 (8), pp. 1670-1681 |
Number of Pages | 12 |
Year | 1993 |
Place of Publication | United States |
ISSN | 0022-3670 |
1520-0485 | |
Digital Object Identifier (DOI) | https://doi.org/10.1175/1520-0485(1993)023<1670:MEIAGO>2.0.CO;2 |
Web Address (URL) | https://journals.ametsoc.org/view/journals/phoc/23/8/1520-0485_1993_023_1670_meiago_2_0_co_2.xml |
Abstract | A global ocean general circulation model is forced using various upper boundary conditions (BCs) on temperature and salinity. Solutions are obtained under restoring and mixed BCs (i.e., a restoring condition on the upper-level temperature but using a fixed, specified surface salt flux). Salt flux anomalies are temporarily applied under mixed BCs, and solutions are obtained in which overturning associated with deep-water formation is either present or absent in the North Atlantic and either vigorous or weak in the North Pacific. A comparison between these solutions helps to clarify the role North Atlantic deep-water formation plays in maintaining the current climate. The surface heat fluxes differ substantially between the solutions, and their very existence is dependent upon these differences. As a result they are not multiple equilibra of the ocean model alone. Instead, they should be regarded as multiple equilibria of a very crude coupled atmosphere-ocean system. |
Keywords | GCM; global ocean; heat flux; multiple equilibria |
ANZSRC Field of Research 2020 | 370201. Climate change processes |
370803. Physical oceanography | |
Byline Affiliations | Australian Bureau of Meteorology |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6x02/multiple-equilibria-in-a-global-ocean-general-circulation-model
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