Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity
This thesis aims to investigate variations of the last glacial and deglacial Atlantic Ocean circulation, with emphasize on the Atlantic deepwater ventilation rate during the Last Glacial Maximum (LGM). The highlights of the thesis are as the followings: (1) the modern frontal zone between the North...
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Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
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Universität Bremen
2013
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/511 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103279-13 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/511 2023-05-15T17:34:17+02:00 Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity Atlantische Meridoniale Umwälzzirkulation während des Lestzen Glazials und Deglazials: Interferenzen von der tropischen Atlantik Thermoklinen Temperatur und der Ozeanwasser Radiokarbon Aktivität Huang, Enqing Schulz, Michael Kucera, Michal 2013-05-24 application/pdf https://media.suub.uni-bremen.de/handle/elib/511 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103279-13 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/511 urn:nbn:de:gbv:46-00103279-13 info:eu-repo/semantics/openAccess climate change ocean circulation Atlantic Ocean glacial deglacial thermocline radiocarbon global carbon cycle foraminifera carbonate trace elements deep ocean ventilation rates 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2013 ftsubbremen 2022-11-09T07:09:22Z This thesis aims to investigate variations of the last glacial and deglacial Atlantic Ocean circulation, with emphasize on the Atlantic deepwater ventilation rate during the Last Glacial Maximum (LGM). The highlights of the thesis are as the followings: (1) the modern frontal zone between the North Atlantic and the South Atlantic central waters off NW Africa shifted to the south during the last glacial and deglacial time periods. (2) The radiocarbon-based circulation age of the deep Atlantic (> 1500 m) was estimated to be less than 400 years during the LGM, which was equal to or less than its pre-bomb value. Therefore, the LGM deep Atlantic was inferred to be well ventilated. (3) The abyssal Atlantic (below 2500 m) prior to the LGM was more depleted in radiocarbon activities by 400 per mil than the contemporary atmosphere. A significant change in the structure of the carbon cycle could have importantly contributed to extremely high atmospheric radiocarbon activities prior to the LGM. Doctoral or Postdoctoral Thesis North Atlantic Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Atlantik |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
climate change ocean circulation Atlantic Ocean glacial deglacial thermocline radiocarbon global carbon cycle foraminifera carbonate trace elements deep ocean ventilation rates 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
climate change ocean circulation Atlantic Ocean glacial deglacial thermocline radiocarbon global carbon cycle foraminifera carbonate trace elements deep ocean ventilation rates 550 550 Earth sciences and geology ddc:550 Huang, Enqing Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity |
topic_facet |
climate change ocean circulation Atlantic Ocean glacial deglacial thermocline radiocarbon global carbon cycle foraminifera carbonate trace elements deep ocean ventilation rates 550 550 Earth sciences and geology ddc:550 |
description |
This thesis aims to investigate variations of the last glacial and deglacial Atlantic Ocean circulation, with emphasize on the Atlantic deepwater ventilation rate during the Last Glacial Maximum (LGM). The highlights of the thesis are as the followings: (1) the modern frontal zone between the North Atlantic and the South Atlantic central waters off NW Africa shifted to the south during the last glacial and deglacial time periods. (2) The radiocarbon-based circulation age of the deep Atlantic (> 1500 m) was estimated to be less than 400 years during the LGM, which was equal to or less than its pre-bomb value. Therefore, the LGM deep Atlantic was inferred to be well ventilated. (3) The abyssal Atlantic (below 2500 m) prior to the LGM was more depleted in radiocarbon activities by 400 per mil than the contemporary atmosphere. A significant change in the structure of the carbon cycle could have importantly contributed to extremely high atmospheric radiocarbon activities prior to the LGM. |
author2 |
Schulz, Michael Kucera, Michal |
format |
Doctoral or Postdoctoral Thesis |
author |
Huang, Enqing |
author_facet |
Huang, Enqing |
author_sort |
Huang, Enqing |
title |
Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity |
title_short |
Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity |
title_full |
Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity |
title_fullStr |
Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity |
title_full_unstemmed |
Atlantic Meridional Overturning Circulation during the Last Glacial and Deglacial: Inferences from the Atlantic Tropical Thermocline Temperature and Seawater Radiocarbon Activity |
title_sort |
atlantic meridional overturning circulation during the last glacial and deglacial: inferences from the atlantic tropical thermocline temperature and seawater radiocarbon activity |
publisher |
Universität Bremen |
publishDate |
2013 |
url |
https://media.suub.uni-bremen.de/handle/elib/511 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103279-13 |
geographic |
Atlantik |
geographic_facet |
Atlantik |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/511 urn:nbn:de:gbv:46-00103279-13 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766133058427158528 |