Modelling the Overflows Across the Greenland–Scotland Ridge
The Atlantic Meridional Overturning Circulation (AMOC) is part of a global redistribution system in the ocean that carries vast amounts of mass, heat, and freshwater. Within the AMOC, water mass transformations in the Nordic Seas (NS) and the overflows across the Greenland-Scotland Ridge (GSR) contr...
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ftoceanrep:oai:oceanrep.geomar.de:29769 2023-05-15T14:27:20+02:00 Modelling the Overflows Across the Greenland–Scotland Ridge Jungclaus, Johann H. Macrander, Andreas Käse, Rolf H. Dickson, Robert R. Meincke, Jens Rhines, Peter 2008 text https://oceanrep.geomar.de/id/eprint/29769/ https://oceanrep.geomar.de/id/eprint/29769/1/Jung08.pdf https://doi.org/10.1007/978-1-4020-6774-7_23 en eng Springer https://oceanrep.geomar.de/id/eprint/29769/1/Jung08.pdf Jungclaus, J. H., Macrander, A. and Käse, R. H. (2008) Modelling the Overflows Across the Greenland–Scotland Ridge. In: Arctic–Subarctic Ocean Fluxes. , ed. by Dickson, R. R., Meincke, J. and Rhines, P. Springer, Heidelberg, Germany, pp. 527-549. ISBN 978-1-4020-6773-0 DOI 10.1007/978-1-4020-6774-7_23 <https://doi.org/10.1007/978-1-4020-6774-7_23>. doi:10.1007/978-1-4020-6774-7_23 cc_by_3.0 Book chapter NonPeerReviewed 2008 ftoceanrep https://doi.org/10.1007/978-1-4020-6774-7_23 2023-04-07T15:20:54Z The Atlantic Meridional Overturning Circulation (AMOC) is part of a global redistribution system in the ocean that carries vast amounts of mass, heat, and freshwater. Within the AMOC, water mass transformations in the Nordic Seas (NS) and the overflows across the Greenland-Scotland Ridge (GSR) contribute significantly to the overturning mass transport. The deep NS are separated by the GSR from direct exchange with the subpolar North Atlantic. Two deeper passages, Denmark Strait (DS, sill depth 630 m) and Faroe Bank Channel (FBC, sill depth 840 m), constrain the deep outflow. The outflow transports are assumed to be governed by hydraulic control (Whitehead 1989, 1998). According to the circulation scheme by Dickson and Brown (1994), there is an overflow of 2.9 Sv (1 Sv = 1 Sverdrup = 106 m3 s–1) through DS, 1.7 Sv through FBC and another 1 Sv from flow across the Iceland%Faroe Ridge (IFR). To the south of the GSR, the overflows sink to depth and then spread along the topography, eventually merging to form a deep boundary current in the western Irminger Sea. During the descent, the dense bottom water flow doubles its volume by entrainment of ambient waters (e.g. Price and Baringer 1994) so that there is a deep water transport of 13.3 Sv once the boundary current reaches Cape Farvel (Dickson and Brown 1994). Thus the overflows and the overflow-related part of the AMOC account for more than 70% of the maximum total overturning, which is estimated from observations to be about 18 Sv (e.g. Macdonald 1998) Book Part Arctic Denmark Strait Greenland Greenland-Scotland Ridge Iceland Nordic Seas North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Faroe Bank ENVELOPE(-8.667,-8.667,60.917,60.917) Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) 527 549 Dordrecht |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The Atlantic Meridional Overturning Circulation (AMOC) is part of a global redistribution system in the ocean that carries vast amounts of mass, heat, and freshwater. Within the AMOC, water mass transformations in the Nordic Seas (NS) and the overflows across the Greenland-Scotland Ridge (GSR) contribute significantly to the overturning mass transport. The deep NS are separated by the GSR from direct exchange with the subpolar North Atlantic. Two deeper passages, Denmark Strait (DS, sill depth 630 m) and Faroe Bank Channel (FBC, sill depth 840 m), constrain the deep outflow. The outflow transports are assumed to be governed by hydraulic control (Whitehead 1989, 1998). According to the circulation scheme by Dickson and Brown (1994), there is an overflow of 2.9 Sv (1 Sv = 1 Sverdrup = 106 m3 s–1) through DS, 1.7 Sv through FBC and another 1 Sv from flow across the Iceland%Faroe Ridge (IFR). To the south of the GSR, the overflows sink to depth and then spread along the topography, eventually merging to form a deep boundary current in the western Irminger Sea. During the descent, the dense bottom water flow doubles its volume by entrainment of ambient waters (e.g. Price and Baringer 1994) so that there is a deep water transport of 13.3 Sv once the boundary current reaches Cape Farvel (Dickson and Brown 1994). Thus the overflows and the overflow-related part of the AMOC account for more than 70% of the maximum total overturning, which is estimated from observations to be about 18 Sv (e.g. Macdonald 1998) |
author2 |
Dickson, Robert R. Meincke, Jens Rhines, Peter |
format |
Book Part |
author |
Jungclaus, Johann H. Macrander, Andreas Käse, Rolf H. |
spellingShingle |
Jungclaus, Johann H. Macrander, Andreas Käse, Rolf H. Modelling the Overflows Across the Greenland–Scotland Ridge |
author_facet |
Jungclaus, Johann H. Macrander, Andreas Käse, Rolf H. |
author_sort |
Jungclaus, Johann H. |
title |
Modelling the Overflows Across the Greenland–Scotland Ridge |
title_short |
Modelling the Overflows Across the Greenland–Scotland Ridge |
title_full |
Modelling the Overflows Across the Greenland–Scotland Ridge |
title_fullStr |
Modelling the Overflows Across the Greenland–Scotland Ridge |
title_full_unstemmed |
Modelling the Overflows Across the Greenland–Scotland Ridge |
title_sort |
modelling the overflows across the greenland–scotland ridge |
publisher |
Springer |
publishDate |
2008 |
url |
https://oceanrep.geomar.de/id/eprint/29769/ https://oceanrep.geomar.de/id/eprint/29769/1/Jung08.pdf https://doi.org/10.1007/978-1-4020-6774-7_23 |
long_lat |
ENVELOPE(-8.667,-8.667,60.917,60.917) ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Faroe Bank Greenland Irminger Sea |
geographic_facet |
Faroe Bank Greenland Irminger Sea |
genre |
Arctic Denmark Strait Greenland Greenland-Scotland Ridge Iceland Nordic Seas North Atlantic |
genre_facet |
Arctic Denmark Strait Greenland Greenland-Scotland Ridge Iceland Nordic Seas North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/29769/1/Jung08.pdf Jungclaus, J. H., Macrander, A. and Käse, R. H. (2008) Modelling the Overflows Across the Greenland–Scotland Ridge. In: Arctic–Subarctic Ocean Fluxes. , ed. by Dickson, R. R., Meincke, J. and Rhines, P. Springer, Heidelberg, Germany, pp. 527-549. ISBN 978-1-4020-6773-0 DOI 10.1007/978-1-4020-6774-7_23 <https://doi.org/10.1007/978-1-4020-6774-7_23>. doi:10.1007/978-1-4020-6774-7_23 |
op_rights |
cc_by_3.0 |
op_doi |
https://doi.org/10.1007/978-1-4020-6774-7_23 |
container_start_page |
527 |
op_container_end_page |
549 |
op_publisher_place |
Dordrecht |
_version_ |
1766301017940426752 |