Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone
During the "Atlantic Expedition" in 1965 (IQSY) a comprehensive bathymetric survey and a few hydrographic stations were made by R.V. "Meteor" in the equatorial region of the Mid-Atlantic Ridge. The survey results are shown in a bathymetric chart covering the western parts of the...
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Bornträger
1970
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Online Access: | https://oceanrep.geomar.de/id/eprint/56353/ https://oceanrep.geomar.de/id/eprint/56353/1/Tomczak_M_1970_A_2.pdf https://oceanrep.geomar.de/id/eprint/56353/2/Karte%20no%207%201%20-%20Kopie.pdf https://oceanrep.geomar.de/id/eprint/56353/3/Karte%20No%207%202%20-%20Kopie.pdf |
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ftoceanrep:oai:oceanrep.geomar.de:56353 2023-05-15T14:10:42+02:00 Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone Tomczak, Gerhard Annutsch, Ralph 1970 text other https://oceanrep.geomar.de/id/eprint/56353/ https://oceanrep.geomar.de/id/eprint/56353/1/Tomczak_M_1970_A_2.pdf https://oceanrep.geomar.de/id/eprint/56353/2/Karte%20no%207%201%20-%20Kopie.pdf https://oceanrep.geomar.de/id/eprint/56353/3/Karte%20No%207%202%20-%20Kopie.pdf de ger Bornträger https://oceanrep.geomar.de/id/eprint/56353/1/Tomczak_M_1970_A_2.pdf https://oceanrep.geomar.de/id/eprint/56353/2/Karte%20no%207%201%20-%20Kopie.pdf https://oceanrep.geomar.de/id/eprint/56353/3/Karte%20No%207%202%20-%20Kopie.pdf Tomczak, G. and Annutsch, R. (1970) Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone. Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 7 . pp. 111-130. info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1970 ftoceanrep 2023-04-07T16:03:12Z During the "Atlantic Expedition" in 1965 (IQSY) a comprehensive bathymetric survey and a few hydrographic stations were made by R.V. "Meteor" in the equatorial region of the Mid-Atlantic Ridge. The survey results are shown in a bathymetric chart covering the western parts of the Romanche- and Chain Fracture Zones. West fo the original Romanche Trench another deep trench with a medium depth of 6000 m was discovered. The maximum sounding obtained was 7028 m. Both trenches apparently belong to the same fracture zone, but are distinctly separated from each other. The western boundary of the trench against the Brasil Basin is formed by a sill rising to a depth of about 4400 m. The serial hydrographic observations give some indications of the flow of the cold Westatlantic deep watet in the fracture zone area and its influence on the hydrographic conditions in the East-Atlantic Basin. The upper limit of the nearly homogenious Westatlantic bottom water with an Antarctic component lies in about 4400 m. The water mass entering the system of trenches of the Romanehe Fracture Zone over the western sill originates from the lower part of the discontinuity layer lying above the bottom watet. Potential temperatures of 0.6 °C were the lowest observed by "Meteor" in the western trench. There seems to be a remarkable tongue of relatively high salinity and a minimum of oxygen in the deep watet of this trench. At present we can only speculate upon the origin of this highly saline deep water tongue underneath the eastward moving relatively thin layer of less saline Westatlantic deep watet. In the range of the sill separating both trenches a lee-wave is indicated by the distribution of salinity and oxygen, which implies a vertical transport of water masses. Caused by this transport it is assumed that relatively cold watet may be lifted temporarily to a depth, where it can pass the northbounding ridge, thus getting directly into the Sierra Leone Basin. In the original Romanche Trench the cold Westatlantic deep water seems to fill the ... Article in Journal/Newspaper Antarc* Antarctic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Mid-Atlantic Ridge |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
German |
description |
During the "Atlantic Expedition" in 1965 (IQSY) a comprehensive bathymetric survey and a few hydrographic stations were made by R.V. "Meteor" in the equatorial region of the Mid-Atlantic Ridge. The survey results are shown in a bathymetric chart covering the western parts of the Romanche- and Chain Fracture Zones. West fo the original Romanche Trench another deep trench with a medium depth of 6000 m was discovered. The maximum sounding obtained was 7028 m. Both trenches apparently belong to the same fracture zone, but are distinctly separated from each other. The western boundary of the trench against the Brasil Basin is formed by a sill rising to a depth of about 4400 m. The serial hydrographic observations give some indications of the flow of the cold Westatlantic deep watet in the fracture zone area and its influence on the hydrographic conditions in the East-Atlantic Basin. The upper limit of the nearly homogenious Westatlantic bottom water with an Antarctic component lies in about 4400 m. The water mass entering the system of trenches of the Romanehe Fracture Zone over the western sill originates from the lower part of the discontinuity layer lying above the bottom watet. Potential temperatures of 0.6 °C were the lowest observed by "Meteor" in the western trench. There seems to be a remarkable tongue of relatively high salinity and a minimum of oxygen in the deep watet of this trench. At present we can only speculate upon the origin of this highly saline deep water tongue underneath the eastward moving relatively thin layer of less saline Westatlantic deep watet. In the range of the sill separating both trenches a lee-wave is indicated by the distribution of salinity and oxygen, which implies a vertical transport of water masses. Caused by this transport it is assumed that relatively cold watet may be lifted temporarily to a depth, where it can pass the northbounding ridge, thus getting directly into the Sierra Leone Basin. In the original Romanche Trench the cold Westatlantic deep water seems to fill the ... |
format |
Article in Journal/Newspaper |
author |
Tomczak, Gerhard Annutsch, Ralph |
spellingShingle |
Tomczak, Gerhard Annutsch, Ralph Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone |
author_facet |
Tomczak, Gerhard Annutsch, Ralph |
author_sort |
Tomczak, Gerhard |
title |
Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone |
title_short |
Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone |
title_full |
Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone |
title_fullStr |
Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone |
title_full_unstemmed |
Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone |
title_sort |
die topographie und die hydrographischen verhältnisse unterhalb von 2000m tiefe im gebiet der romanche-bruchzone |
publisher |
Bornträger |
publishDate |
1970 |
url |
https://oceanrep.geomar.de/id/eprint/56353/ https://oceanrep.geomar.de/id/eprint/56353/1/Tomczak_M_1970_A_2.pdf https://oceanrep.geomar.de/id/eprint/56353/2/Karte%20no%207%201%20-%20Kopie.pdf https://oceanrep.geomar.de/id/eprint/56353/3/Karte%20No%207%202%20-%20Kopie.pdf |
geographic |
Antarctic Mid-Atlantic Ridge |
geographic_facet |
Antarctic Mid-Atlantic Ridge |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
https://oceanrep.geomar.de/id/eprint/56353/1/Tomczak_M_1970_A_2.pdf https://oceanrep.geomar.de/id/eprint/56353/2/Karte%20no%207%201%20-%20Kopie.pdf https://oceanrep.geomar.de/id/eprint/56353/3/Karte%20No%207%202%20-%20Kopie.pdf Tomczak, G. and Annutsch, R. (1970) Die Topographie und die hydrographischen Verhältnisse unterhalb von 2000m Tiefe im Gebiet der Romanche-Bruchzone. Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 7 . pp. 111-130. |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1766282787455762432 |