Some indications of a reversed surface flow around Tasmania in the Fine Resolution Antarctic Model (FRAM)

Ribbe, Joachim and Tomczak, Matthias (1996) Some indications of a reversed surface flow around Tasmania in the Fine Resolution Antarctic Model (FRAM). Ocean Modelling newsletter, 111. pp. 2-5. ISSN 1463-5003


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[Abstract]: South of Tasmania, the Fine Resolution Antarctic Model (FRAM) shows a narrow band of westward upper layer flow. We argue that this is caused by the closure of the Indonesian passage in FRAM. This is supported by numerical experiments carried out by Hirst & Godfrey (1993). The FRAM surface temperature and salinity distribution exhibits distinct anomalies in the southeast Indian Ocean, in good agreement with anomalies observed in the Hirst & Godfrey (1993) model. Indonesian Throughflow water advects heat into the Indian Ocean; its absence in FRAM results in a lack of thermal energy to warm the Indian Ocean in the model. The surface salinity anomaly is most likely caused by an over-estimated Ekman transport. The weakened heat and salinity transport in FRAM restrict surface convection in the mid-latitude region to approximately 350 m.
The effect of the Indonesian Throughflow closure in FRAM is even more dramatic for the circulation around Australia and Tasmania. Hirst & Godfreys (1993) results suggest that in the case of an open Indonesian passage, the flow in the surface layer is eastward, ie from the Indian to the Pacific Ocean. FRAM shows westward flow consistant with a closed Indonesian passage.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: No
Item Status: Live Archive
Additional Information: Newsletter format - forerunner to the Elsevier journal Ocean Modelling. 'Contributions to Ocean Modelling should not be quoted or published without prior permission of the author. All references to such contributions should be followed by the phrase 'UNPUBLISHED MANUSCRIPT''...[Ocean Modelling Issue 111, July 1996].
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:36
Last Modified: 02 Jul 2013 22:36
Uncontrolled Keywords: ocean circulation, Southern Ocean, Pacific Ocean, Indian Ocean, ocean modelling
Fields of Research : 04 Earth Sciences > 0405 Oceanography > 040503 Physical Oceanography

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