Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model
The flow which constitutes the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model has been investigated with the help of a particle tracking method. In the region of North Atlantic Deep Water formation a thousand trajectories were calculated backward in time to the...
Published in: | Journal of Geophysical Research: Oceans |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
1996
|
Subjects: | |
Online Access: | https://eprints.soton.ac.uk/349206/ |
id |
ftsouthampton:oai:eprints.soton.ac.uk:349206 |
---|---|
record_format |
openpolar |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:349206 2023-07-30T03:59:16+02:00 Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model Drijfhout, Sybren S. Maier-Reimer, Ernst Mikolajewicz, Uwe 1996-01 https://eprints.soton.ac.uk/349206/ unknown Drijfhout, Sybren S., Maier-Reimer, Ernst and Mikolajewicz, Uwe (1996) Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model. Journal of Geophysical Research, 101 (C10), 22563-22575. (doi:10.1029/96JC02162 <http://dx.doi.org/10.1029/96JC02162>). Article PeerReviewed 1996 ftsouthampton https://doi.org/10.1029/96JC02162 2023-07-09T21:44:43Z The flow which constitutes the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model has been investigated with the help of a particle tracking method. In the region of North Atlantic Deep Water formation a thousand trajectories were calculated backward in time to the point where they upwell from the deep ocean. Both the three-dimensional velocity field and convective overturning have been used for this calculation. Together, the trajectories form a representative picture of the upper branch of the conveyor belt in the model. In the Atlantic Ocean the path and strength (17 Sv) of the conveyor belt in the model are found to be consistent with observations. All trajectories enter the South Atlantic via Drake Passage, as the model does not simulate any Agulhas leakage. Large changes in water masses occur in the South Atlantic midlatitudes and subtropical North Atlantic. Along its path in the Atlantic the water in the conveyor belt is transformed from Antarctic Intermediate Water to Central North Atlantic Water. On the average the timescale on which the water mass characteristics are approximately conserved is only a few years compared to the timescale of 70 years for the conveyor belt to cross the Atlantic. The ventilation of thermocline waters in the South Atlantic midlatitudes is overestimated in the model due to too much convective deepening of the winter mixed layer. As a result the fraction of the conveyor belt water flowing in the surface layer is also overestimated, along with integrated effects of atmospheric forcing. The abnormally strong water mass transformation in the South Atlantic might be related to the absence of Agulhas leakage in the model. Article in Journal/Newspaper Antarc* Antarctic Drake Passage North Atlantic Deep Water North Atlantic University of Southampton: e-Prints Soton Antarctic Drake Passage Journal of Geophysical Research: Oceans 101 C10 22563 22575 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
unknown |
description |
The flow which constitutes the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model has been investigated with the help of a particle tracking method. In the region of North Atlantic Deep Water formation a thousand trajectories were calculated backward in time to the point where they upwell from the deep ocean. Both the three-dimensional velocity field and convective overturning have been used for this calculation. Together, the trajectories form a representative picture of the upper branch of the conveyor belt in the model. In the Atlantic Ocean the path and strength (17 Sv) of the conveyor belt in the model are found to be consistent with observations. All trajectories enter the South Atlantic via Drake Passage, as the model does not simulate any Agulhas leakage. Large changes in water masses occur in the South Atlantic midlatitudes and subtropical North Atlantic. Along its path in the Atlantic the water in the conveyor belt is transformed from Antarctic Intermediate Water to Central North Atlantic Water. On the average the timescale on which the water mass characteristics are approximately conserved is only a few years compared to the timescale of 70 years for the conveyor belt to cross the Atlantic. The ventilation of thermocline waters in the South Atlantic midlatitudes is overestimated in the model due to too much convective deepening of the winter mixed layer. As a result the fraction of the conveyor belt water flowing in the surface layer is also overestimated, along with integrated effects of atmospheric forcing. The abnormally strong water mass transformation in the South Atlantic might be related to the absence of Agulhas leakage in the model. |
format |
Article in Journal/Newspaper |
author |
Drijfhout, Sybren S. Maier-Reimer, Ernst Mikolajewicz, Uwe |
spellingShingle |
Drijfhout, Sybren S. Maier-Reimer, Ernst Mikolajewicz, Uwe Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model |
author_facet |
Drijfhout, Sybren S. Maier-Reimer, Ernst Mikolajewicz, Uwe |
author_sort |
Drijfhout, Sybren S. |
title |
Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model |
title_short |
Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model |
title_full |
Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model |
title_fullStr |
Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model |
title_full_unstemmed |
Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model |
title_sort |
tracing the conveyor belt in the hamburg large-scale geostrophic ocean general circulation model |
publishDate |
1996 |
url |
https://eprints.soton.ac.uk/349206/ |
geographic |
Antarctic Drake Passage |
geographic_facet |
Antarctic Drake Passage |
genre |
Antarc* Antarctic Drake Passage North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic Drake Passage North Atlantic Deep Water North Atlantic |
op_relation |
Drijfhout, Sybren S., Maier-Reimer, Ernst and Mikolajewicz, Uwe (1996) Tracing the conveyor belt in the Hamburg large-scale geostrophic ocean general circulation model. Journal of Geophysical Research, 101 (C10), 22563-22575. (doi:10.1029/96JC02162 <http://dx.doi.org/10.1029/96JC02162>). |
op_doi |
https://doi.org/10.1029/96JC02162 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
101 |
container_issue |
C10 |
container_start_page |
22563 |
op_container_end_page |
22575 |
_version_ |
1772810007225565184 |