q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow
A series of experiments with a hybrid model (ocean circulation model with simple atmospheric feedback model) and an ocean-only model is used to study the sensitivity of the ocean’s deep overturning circulation to Southern Hemisphere winds. In particular, the ‘‘Drake Passage effect’ ’ is examined. Th...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.685.6408 2023-05-15T13:54:19+02:00 q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow Stefan Rahmstorf Matthew H. England The Pennsylvania State University CiteSeerX Archives 1996 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.685.6408 http://web.science.unsw.edu.au/%7Ematthew/RE_97.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.685.6408 http://web.science.unsw.edu.au/%7Ematthew/RE_97.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://web.science.unsw.edu.au/%7Ematthew/RE_97.pdf text 1996 ftciteseerx 2016-01-08T18:06:42Z A series of experiments with a hybrid model (ocean circulation model with simple atmospheric feedback model) and an ocean-only model is used to study the sensitivity of the ocean’s deep overturning circulation to Southern Hemisphere winds. In particular, the ‘‘Drake Passage effect’ ’ is examined. The results show that two factors weaken the control that the Drake Passage effect exerts over the flow of North Atlantic Deep Water (NADW). The first is that thermohaline forcing alone can generate about 75 % of the NADW flow found in our model; this ability is lost if atmospheric feedback is neglected. The second is that about two-thirds of the downwelling induced by Ekman transport across Drake Passage occurs in the Southern Hemisphere just north of Drake Passage; only one-third occurs in the North Atlantic and enhances NADW flow. For these two reasons, the influence of Southern Ocean winds on NADW flow is only moderate and not as strong as previously suggested. However, the authors find that the formation rate of Antarctic Bottom Water depends strongly on the winds over the Southern Ocean. 1. Text Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean Unknown Antarctic Drake Passage Southern Ocean |
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English |
description |
A series of experiments with a hybrid model (ocean circulation model with simple atmospheric feedback model) and an ocean-only model is used to study the sensitivity of the ocean’s deep overturning circulation to Southern Hemisphere winds. In particular, the ‘‘Drake Passage effect’ ’ is examined. The results show that two factors weaken the control that the Drake Passage effect exerts over the flow of North Atlantic Deep Water (NADW). The first is that thermohaline forcing alone can generate about 75 % of the NADW flow found in our model; this ability is lost if atmospheric feedback is neglected. The second is that about two-thirds of the downwelling induced by Ekman transport across Drake Passage occurs in the Southern Hemisphere just north of Drake Passage; only one-third occurs in the North Atlantic and enhances NADW flow. For these two reasons, the influence of Southern Ocean winds on NADW flow is only moderate and not as strong as previously suggested. However, the authors find that the formation rate of Antarctic Bottom Water depends strongly on the winds over the Southern Ocean. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Stefan Rahmstorf Matthew H. England |
spellingShingle |
Stefan Rahmstorf Matthew H. England q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow |
author_facet |
Stefan Rahmstorf Matthew H. England |
author_sort |
Stefan Rahmstorf |
title |
q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow |
title_short |
q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow |
title_full |
q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow |
title_fullStr |
q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow |
title_full_unstemmed |
q 1997 American Meteorological Society Influence of Southern Hemisphere Winds on North Atlantic Deep Water Flow |
title_sort |
q 1997 american meteorological society influence of southern hemisphere winds on north atlantic deep water flow |
publishDate |
1996 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.685.6408 http://web.science.unsw.edu.au/%7Ematthew/RE_97.pdf |
geographic |
Antarctic Drake Passage Southern Ocean |
geographic_facet |
Antarctic Drake Passage Southern Ocean |
genre |
Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
http://web.science.unsw.edu.au/%7Ematthew/RE_97.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.685.6408 http://web.science.unsw.edu.au/%7Ematthew/RE_97.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766260021716320256 |