Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome
The Guinea Dome is a permanent, quasi-stationary feature on the eastern side of the thermal ridge extending zonally across the tropical North Atlantic. The dome is a part of the large-scale near-surface flow fields associated with the North Equatorial Current, the North Equatorial Countercurrent and...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
AGU (American Geophysical Union)
1992
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/15392/ https://oceanrep.geomar.de/id/eprint/15392/1/91JC02501.pdf https://doi.org/10.1029/91JC02501 |
id |
ftoceanrep:oai:oceanrep.geomar.de:15392 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:15392 2023-05-15T17:32:42+02:00 Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome Siedler, Gerold Zangenberg, Norbert Onken, Reiner Morlière, Alain 1992 text https://oceanrep.geomar.de/id/eprint/15392/ https://oceanrep.geomar.de/id/eprint/15392/1/91JC02501.pdf https://doi.org/10.1029/91JC02501 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/15392/1/91JC02501.pdf Siedler, G., Zangenberg, N., Onken, R. and Morlière, A. (1992) Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome. Open Access Journal of Geophysical Research: Oceans, 97 (C1). pp. 703-715. DOI 10.1029/91JC02501 <https://doi.org/10.1029/91JC02501>. doi:10.1029/91JC02501 info:eu-repo/semantics/openAccess Article PeerReviewed 1992 ftoceanrep https://doi.org/10.1029/91JC02501 2023-04-07T15:05:23Z The Guinea Dome is a permanent, quasi-stationary feature on the eastern side of the thermal ridge extending zonally across the tropical North Atlantic. The dome is a part of the large-scale near-surface flow fields associated with the North Equatorial Current, the North Equatorial Countercurrent and the North Equatorial Undercurrent. In the present study, historical and recently obtained hydrographic data are combined to investigate the thermohaline structure and geostrophic flow field in the vicinity of the dome. It is shown that the Guinea Dome exists throughout the year both in subthermocline and thermocline layers, that it has a corresponding cyclonic geostrophic flow, and that seasonal changes occur with respect to its vertical structure, horizontal extent, and position. The observational results are then compared with simulations from a general circulation model of the tropical Atlantic. A seven-year simulation forced by observed monthly winds is run to compute a monthly climatology. The model adequately simulates the Guinea Dome with respect to its structure, flow field, and seasonal variability. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Journal of Geophysical Research 97 C1 703 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The Guinea Dome is a permanent, quasi-stationary feature on the eastern side of the thermal ridge extending zonally across the tropical North Atlantic. The dome is a part of the large-scale near-surface flow fields associated with the North Equatorial Current, the North Equatorial Countercurrent and the North Equatorial Undercurrent. In the present study, historical and recently obtained hydrographic data are combined to investigate the thermohaline structure and geostrophic flow field in the vicinity of the dome. It is shown that the Guinea Dome exists throughout the year both in subthermocline and thermocline layers, that it has a corresponding cyclonic geostrophic flow, and that seasonal changes occur with respect to its vertical structure, horizontal extent, and position. The observational results are then compared with simulations from a general circulation model of the tropical Atlantic. A seven-year simulation forced by observed monthly winds is run to compute a monthly climatology. The model adequately simulates the Guinea Dome with respect to its structure, flow field, and seasonal variability. |
format |
Article in Journal/Newspaper |
author |
Siedler, Gerold Zangenberg, Norbert Onken, Reiner Morlière, Alain |
spellingShingle |
Siedler, Gerold Zangenberg, Norbert Onken, Reiner Morlière, Alain Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome |
author_facet |
Siedler, Gerold Zangenberg, Norbert Onken, Reiner Morlière, Alain |
author_sort |
Siedler, Gerold |
title |
Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome |
title_short |
Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome |
title_full |
Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome |
title_fullStr |
Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome |
title_full_unstemmed |
Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome |
title_sort |
seasonal changes in the tropical atlantic circulation: observation and simulation of the guinea dome |
publisher |
AGU (American Geophysical Union) |
publishDate |
1992 |
url |
https://oceanrep.geomar.de/id/eprint/15392/ https://oceanrep.geomar.de/id/eprint/15392/1/91JC02501.pdf https://doi.org/10.1029/91JC02501 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/15392/1/91JC02501.pdf Siedler, G., Zangenberg, N., Onken, R. and Morlière, A. (1992) Seasonal Changes in the Tropical Atlantic Circulation: Observation and Simulation of the Guinea Dome. Open Access Journal of Geophysical Research: Oceans, 97 (C1). pp. 703-715. DOI 10.1029/91JC02501 <https://doi.org/10.1029/91JC02501>. doi:10.1029/91JC02501 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/91JC02501 |
container_title |
Journal of Geophysical Research |
container_volume |
97 |
container_issue |
C1 |
container_start_page |
703 |
_version_ |
1766130947114139648 |