North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state
[1] It is generally accepted that surface freshwater anomalies in the Southern Ocean drive increases in North Atlantic Deep Water (NADW) formation via a bipolar density see-saw. We find that a Southern Ocean freshwater pulse of comparable magnitude to meltwater pulse 1A, shuts down, instead of stren...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.573.1173 2023-05-15T17:13:49+02:00 North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state J. Trevena W. P. Sijp The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.1173 http://web.maths.unsw.edu.au/~wsijp/papers/trevena2008_collapse.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.1173 http://web.maths.unsw.edu.au/~wsijp/papers/trevena2008_collapse.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://web.maths.unsw.edu.au/~wsijp/papers/trevena2008_collapse.pdf collapses North Pacific Deep Water develops consistent with a North Pacific/North Atlantic see-saw triggered from text ftciteseerx 2016-01-08T12:37:19Z [1] It is generally accepted that surface freshwater anomalies in the Southern Ocean drive increases in North Atlantic Deep Water (NADW) formation via a bipolar density see-saw. We find that a Southern Ocean freshwater pulse of comparable magnitude to meltwater pulse 1A, shuts down, instead of strengthens, NADW in a glacial climate simulation. Unlike the modern-day simulation, the glacial experiment is associated with a more fragile North Atlantic thermohaline circulation, whereby freshwater anomalies that propagate into the North Atlantic are able to dominate the bipolar density see-saw. Meltwater pulses over the North Atlantic and subsequent NADW shut down are often invoked to explain cold ‘Heinrich Events’ appearing in the paleoclimate record. Our results suggest that triggers for NADW collapse may also originate from the southern hemisphere in glacial epochs. Once NADW Text NADW North Atlantic Deep Water North Atlantic North atlantic Thermohaline circulation Southern Ocean Unknown Southern Ocean Pacific |
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collapses North Pacific Deep Water develops consistent with a North Pacific/North Atlantic see-saw triggered from |
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collapses North Pacific Deep Water develops consistent with a North Pacific/North Atlantic see-saw triggered from J. Trevena W. P. Sijp North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state |
topic_facet |
collapses North Pacific Deep Water develops consistent with a North Pacific/North Atlantic see-saw triggered from |
description |
[1] It is generally accepted that surface freshwater anomalies in the Southern Ocean drive increases in North Atlantic Deep Water (NADW) formation via a bipolar density see-saw. We find that a Southern Ocean freshwater pulse of comparable magnitude to meltwater pulse 1A, shuts down, instead of strengthens, NADW in a glacial climate simulation. Unlike the modern-day simulation, the glacial experiment is associated with a more fragile North Atlantic thermohaline circulation, whereby freshwater anomalies that propagate into the North Atlantic are able to dominate the bipolar density see-saw. Meltwater pulses over the North Atlantic and subsequent NADW shut down are often invoked to explain cold ‘Heinrich Events’ appearing in the paleoclimate record. Our results suggest that triggers for NADW collapse may also originate from the southern hemisphere in glacial epochs. Once NADW |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. Trevena W. P. Sijp |
author_facet |
J. Trevena W. P. Sijp |
author_sort |
J. Trevena W. P. Sijp |
title |
North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state |
title_short |
North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state |
title_full |
North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state |
title_fullStr |
North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state |
title_full_unstemmed |
North Atlantic Deep Water collapse triggered by a Southern Ocean meltwater pulse in a glacial climate state |
title_sort |
north atlantic deep water collapse triggered by a southern ocean meltwater pulse in a glacial climate state |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.1173 http://web.maths.unsw.edu.au/~wsijp/papers/trevena2008_collapse.pdf |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
NADW North Atlantic Deep Water North Atlantic North atlantic Thermohaline circulation Southern Ocean |
genre_facet |
NADW North Atlantic Deep Water North Atlantic North atlantic Thermohaline circulation Southern Ocean |
op_source |
http://web.maths.unsw.edu.au/~wsijp/papers/trevena2008_collapse.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.573.1173 http://web.maths.unsw.edu.au/~wsijp/papers/trevena2008_collapse.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766071003725692928 |