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Please use this identifier to cite or link to this item: http://hdl.handle.net/1956/2393

Title:	On the Nordic Seas’ role in the Atlantic Meridional Overturning Circulation
Authors:	Iovino, Doroteaciro
Issue Date:	27-Jun-2007
Publisher:	The University of Bergen
Abstract:	In the present climate, the North Atlantic thermohaline circulation (THC) plays a fundamental role in the global transport of heat at high latitudes. The response of the North Atlantic Ocean-Nordic Seas THC to surface forcing and basin geometries in an idealized one-hemisphere basin is analyzed to better understand the processes that are fundamental to the modeled circulation. Focusing on the dynamics of the Nordic Seas, analytical and numerical modeling highlight the relevance of a sill (Greenland-Scotland Ridge) in setting the properties of the water masses formed in and exported from a marginal sea. Finally, the influence of the convective activity in the Greenland Sea for the overflow, and thus the overturning, is assessed using hydrographic data (from 1950 to present), a regional ocean model, and a unique tracer release experiment. Greenland Sea Gyre water is estimated to contribute less than 1 Sv, and there is no evidence for causality between changes in the Greenland Sea and the overflow.
URI:	http://hdl.handle.net/1956/2393
ISBN:	978-82-308-0404-9 (print version)
Appears in Collections:	Bjerknes Center for Climate Research Nansen Environmental and Remote Sensing Center (NERSC) (Various) Geophysical Institute (Various)

Files in This Item: File Description Size Format Main_Thesis_Doroteaciro_Iovino.pdf Main Thesis 1.08 MB Adobe PDF View/Open Paper_I_Doroteaciro_Iovino.pdf Iovino, D. and Eldevik, T., (2007), Fundamental aspects of the thermohaline gyre circulation in an idealized North Atlantic Ocean. Manuscript submitted to Journal of Marine Research. Published by Yale University. 358.15 kB Adobe PDF View/Open Paper_II_Doroteaciro_Iovino.pdf Iovino, D.; Straneo, F. and Spall, M. A., (2007), On the effect of a sill on dense water formation in a marginal sea. Manuscript submitted to Journal of Marine Research. Published by Yale University. 792.54 kB Adobe PDF View/Open Paper_III_Doroteaciro_Iovino.pdf Eldevik, T.; Nilsen, J. E. Ø.; Iovino, D.; Olsson, K. A. and Sandø, A. B., (2007), The Greenland Sea does not control the overflows feeding the Atlantic conveyor. Manuscript to be submitted to Nature. 595.21 kB Adobe PDF View/Open

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