Air-sea interactions during glacial Heinrich events
'Heinrich events' - massive iceberg discharges from Northern Hemisphere ice sheets during the last ice age - coincided with cold periods and subsequent abrupt warmings on the Northern Hemisphere. Climate reconstructions suggest that the associated freshwater pulses caused a temporary colla...
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ftunivkiel:oai:macau.uni-kiel.de:diss_mods_00001924 2024-06-23T07:55:07+00:00 Air-sea interactions during glacial Heinrich events Krebs, Uta Willebrand, Jürgen Timmermann, Axel 2006 https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-19241 https://macau.uni-kiel.de/receive/diss_mods_00001924 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001924/d1924.pdf eng eng https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-19241 https://macau.uni-kiel.de/receive/diss_mods_00001924 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001924/d1924.pdf https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess ddc:550 thesis Heinrich events glacial climate coupled climate model dissertation Text doc-type:PhDThesis 2006 ftunivkiel 2024-06-12T14:21:16Z 'Heinrich events' - massive iceberg discharges from Northern Hemisphere ice sheets during the last ice age - coincided with cold periods and subsequent abrupt warmings on the Northern Hemisphere. Climate reconstructions suggest that the associated freshwater pulses caused a temporary collapse of the Atlantic Meridional Overturning Circulation (AMOC) by stabilizing stratification in the regions of deep water formation. In the present work a coupled atmosphere-ocean-sea ice model is employed under glacial boundary conditions to assess climate feedbacks during a freshwater induced collapse of the AMOC. Emphasis is placed on mechanisms which facilitate a fast recovery of the AMOC. It is found that air-sea coupling in the tropical Atlantic strongly influences the recovery time scale. Reduced poleward heat transport in the North Atlantic leads to a cooling north of the equator and reduced north equatorial precipitation. When transported northward by the wind driven circulation the arising salinity anomaly stabilises the stratification in the deep water formation regions and large-scale meridional overturning is re-initiated. Doctoral or Postdoctoral Thesis North Atlantic Sea ice MACAU: Open Access Repository of Kiel University |
institution |
Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
ddc:550 thesis Heinrich events glacial climate coupled climate model |
spellingShingle |
ddc:550 thesis Heinrich events glacial climate coupled climate model Krebs, Uta Air-sea interactions during glacial Heinrich events |
topic_facet |
ddc:550 thesis Heinrich events glacial climate coupled climate model |
description |
'Heinrich events' - massive iceberg discharges from Northern Hemisphere ice sheets during the last ice age - coincided with cold periods and subsequent abrupt warmings on the Northern Hemisphere. Climate reconstructions suggest that the associated freshwater pulses caused a temporary collapse of the Atlantic Meridional Overturning Circulation (AMOC) by stabilizing stratification in the regions of deep water formation. In the present work a coupled atmosphere-ocean-sea ice model is employed under glacial boundary conditions to assess climate feedbacks during a freshwater induced collapse of the AMOC. Emphasis is placed on mechanisms which facilitate a fast recovery of the AMOC. It is found that air-sea coupling in the tropical Atlantic strongly influences the recovery time scale. Reduced poleward heat transport in the North Atlantic leads to a cooling north of the equator and reduced north equatorial precipitation. When transported northward by the wind driven circulation the arising salinity anomaly stabilises the stratification in the deep water formation regions and large-scale meridional overturning is re-initiated. |
author2 |
Willebrand, Jürgen Timmermann, Axel |
format |
Doctoral or Postdoctoral Thesis |
author |
Krebs, Uta |
author_facet |
Krebs, Uta |
author_sort |
Krebs, Uta |
title |
Air-sea interactions during glacial Heinrich events |
title_short |
Air-sea interactions during glacial Heinrich events |
title_full |
Air-sea interactions during glacial Heinrich events |
title_fullStr |
Air-sea interactions during glacial Heinrich events |
title_full_unstemmed |
Air-sea interactions during glacial Heinrich events |
title_sort |
air-sea interactions during glacial heinrich events |
publishDate |
2006 |
url |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-19241 https://macau.uni-kiel.de/receive/diss_mods_00001924 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001924/d1924.pdf |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_relation |
https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-19241 https://macau.uni-kiel.de/receive/diss_mods_00001924 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/dissertation_derivate_00001924/d1924.pdf |
op_rights |
https://rightsstatements.org/page/InC/1.0/ info:eu-repo/semantics/openAccess |
_version_ |
1802647556896849920 |