Pathways and modification of the upper and intermediate waters of the Arctic Ocean
The purpose of this study is to investigate the pathways and the ventilation of source water masses of the upper and intermediate waters of the Arctic Ocean. For the Arctic and subarctic domain, a coupled ice-ocean general circulation model is set up to be integrated for several decades. It is drive...
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ftawi:oai:epic.awi.de:4808 2023-09-05T13:15:51+02:00 Pathways and modification of the upper and intermediate waters of the Arctic Ocean Karcher, Michael Oberhuber, J. M. O 2002 application/pdf https://epic.awi.de/id/eprint/4808/ https://epic.awi.de/id/eprint/4808/1/Kar2001b.pdf https://doi.org/10.1029/2000JC000530 https://hdl.handle.net/10013/epic.15376 https://hdl.handle.net/10013/epic.15376.d001 unknown https://epic.awi.de/id/eprint/4808/1/Kar2001b.pdf https://hdl.handle.net/10013/epic.15376.d001 Karcher, M. orcid:0000-0002-9587-811X and Oberhuber, J. M. O. (2002) Pathways and modification of the upper and intermediate waters of the Arctic Ocean, , Journal of Geophysical ResearchC6), 107 . doi:10.1029/2000JC000530 <https://doi.org/10.1029/2000JC000530> , hdl:10013/epic.15376 EPIC3Journal of Geophysical ResearchC6), 107, ISSN: 0148-0227 Article isiRev 2002 ftawi https://doi.org/10.1029/2000JC000530 2023-08-22T19:44:58Z The purpose of this study is to investigate the pathways and the ventilation of source water masses of the upper and intermediate waters of the Arctic Ocean. For the Arctic and subarctic domain, a coupled ice-ocean general circulation model is set up to be integrated for several decades. It is driven by a climatological seasonal cycle of monthly mean atmospheric data from 1980-89 and by restored sea surface salinities. Passive tracers are used to visualise and interpret the modelled flow and to compare it with observations.The model is able to reproduce known features of the Arctic Ocean circulation like the inflow of two branches of Atlantic origin via the Fram Strait and the Barents Sea and their subsequent passage at mid depths in several cyclonic circulation cells. The fate of these Atlantic source water masses, river water and Bering Strait inflow water in the model are studied. The branch crossing the Barents Sea is subject to an intense heat loss and ice formation. As a result water of this branch leaves the shelf towards the central part of the Arctic Ocean not only at the surface but also in denser varieties which finally feed the central Arctic at halocline and mid depths. The lightest part turns northward and finally westward joining the Transpolar Drift, the densest part (200-1000 m depth) move eastward along the continental slope. A similar path is taken by the Atlantic water branch from the Fram Strait. The inflowing branch over the Barents Sea turns out to be the dominant source for the lower Atlantic Water layer in the Arctic Ocean in this investigation.Atlantic tracers starting in Fram Strait need 6 years to reach the northern Laptev Sea slope. Travel times to return to Fram Strait are 15 - 20 years along the Lomonossov Ridge and about 30 years along the continental slope of the Canadian Basin. Tracers which mark the Pacific Water or the Mackenzie river water flow eastward and leave the Arctic mainly via the Canadian Archipelago. The Siberian river water tracers at the surface penetrate far into ... Article in Journal/Newspaper Arctic Arctic Arctic Ocean Barents Sea Bering Strait Canadian Archipelago Fram Strait laptev Laptev Sea Mackenzie river Subarctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Barents Sea Bering Strait Laptev Sea Mackenzie River Pacific Journal of Geophysical Research 107 C6 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The purpose of this study is to investigate the pathways and the ventilation of source water masses of the upper and intermediate waters of the Arctic Ocean. For the Arctic and subarctic domain, a coupled ice-ocean general circulation model is set up to be integrated for several decades. It is driven by a climatological seasonal cycle of monthly mean atmospheric data from 1980-89 and by restored sea surface salinities. Passive tracers are used to visualise and interpret the modelled flow and to compare it with observations.The model is able to reproduce known features of the Arctic Ocean circulation like the inflow of two branches of Atlantic origin via the Fram Strait and the Barents Sea and their subsequent passage at mid depths in several cyclonic circulation cells. The fate of these Atlantic source water masses, river water and Bering Strait inflow water in the model are studied. The branch crossing the Barents Sea is subject to an intense heat loss and ice formation. As a result water of this branch leaves the shelf towards the central part of the Arctic Ocean not only at the surface but also in denser varieties which finally feed the central Arctic at halocline and mid depths. The lightest part turns northward and finally westward joining the Transpolar Drift, the densest part (200-1000 m depth) move eastward along the continental slope. A similar path is taken by the Atlantic water branch from the Fram Strait. The inflowing branch over the Barents Sea turns out to be the dominant source for the lower Atlantic Water layer in the Arctic Ocean in this investigation.Atlantic tracers starting in Fram Strait need 6 years to reach the northern Laptev Sea slope. Travel times to return to Fram Strait are 15 - 20 years along the Lomonossov Ridge and about 30 years along the continental slope of the Canadian Basin. Tracers which mark the Pacific Water or the Mackenzie river water flow eastward and leave the Arctic mainly via the Canadian Archipelago. The Siberian river water tracers at the surface penetrate far into ... |
format |
Article in Journal/Newspaper |
author |
Karcher, Michael Oberhuber, J. M. O |
spellingShingle |
Karcher, Michael Oberhuber, J. M. O Pathways and modification of the upper and intermediate waters of the Arctic Ocean |
author_facet |
Karcher, Michael Oberhuber, J. M. O |
author_sort |
Karcher, Michael |
title |
Pathways and modification of the upper and intermediate waters of the Arctic Ocean |
title_short |
Pathways and modification of the upper and intermediate waters of the Arctic Ocean |
title_full |
Pathways and modification of the upper and intermediate waters of the Arctic Ocean |
title_fullStr |
Pathways and modification of the upper and intermediate waters of the Arctic Ocean |
title_full_unstemmed |
Pathways and modification of the upper and intermediate waters of the Arctic Ocean |
title_sort |
pathways and modification of the upper and intermediate waters of the arctic ocean |
publishDate |
2002 |
url |
https://epic.awi.de/id/eprint/4808/ https://epic.awi.de/id/eprint/4808/1/Kar2001b.pdf https://doi.org/10.1029/2000JC000530 https://hdl.handle.net/10013/epic.15376 https://hdl.handle.net/10013/epic.15376.d001 |
geographic |
Arctic Arctic Ocean Barents Sea Bering Strait Laptev Sea Mackenzie River Pacific |
geographic_facet |
Arctic Arctic Ocean Barents Sea Bering Strait Laptev Sea Mackenzie River Pacific |
genre |
Arctic Arctic Arctic Ocean Barents Sea Bering Strait Canadian Archipelago Fram Strait laptev Laptev Sea Mackenzie river Subarctic |
genre_facet |
Arctic Arctic Arctic Ocean Barents Sea Bering Strait Canadian Archipelago Fram Strait laptev Laptev Sea Mackenzie river Subarctic |
op_source |
EPIC3Journal of Geophysical ResearchC6), 107, ISSN: 0148-0227 |
op_relation |
https://epic.awi.de/id/eprint/4808/1/Kar2001b.pdf https://hdl.handle.net/10013/epic.15376.d001 Karcher, M. orcid:0000-0002-9587-811X and Oberhuber, J. M. O. (2002) Pathways and modification of the upper and intermediate waters of the Arctic Ocean, , Journal of Geophysical ResearchC6), 107 . doi:10.1029/2000JC000530 <https://doi.org/10.1029/2000JC000530> , hdl:10013/epic.15376 |
op_doi |
https://doi.org/10.1029/2000JC000530 |
container_title |
Journal of Geophysical Research |
container_volume |
107 |
container_issue |
C6 |
_version_ |
1776197674245029888 |