Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola)
In the last decades climate change research became more and more important due to the increasing impact of human activities on the Earth s climate system. The consideration of perspectives and results from paleoclimate observations has proven useful for climate change research, the verification of m...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
Universität Bremen
2011
|
Subjects: | |
Online Access: | https://media.suub.uni-bremen.de/handle/elib/115 https://nbn-resolving.org/urn:nbn:de:gbv:46-00101961-15 |
id |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/115 |
---|---|
record_format |
openpolar |
spelling |
ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/115 2023-05-15T17:36:27+02:00 Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) Ozeanography, Klima und Vegetationsentwicklung im tropischen Africa während der letzten Kaltzeit: Palynology und Geochemie von marinen Sedimenten des ODP 1078 (vor Angola). Heßler, Ines Wefer, Gerold Behling, Hermann 2011-04-14 application/pdf https://media.suub.uni-bremen.de/handle/elib/115 https://nbn-resolving.org/urn:nbn:de:gbv:46-00101961-15 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/115 urn:nbn:de:gbv:46-00101961-15 info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) CC-BY Glacial Angola Pollen Mg/Ca 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2011 ftsubbremen 2022-11-09T07:09:18Z In the last decades climate change research became more and more important due to the increasing impact of human activities on the Earth s climate system. The consideration of perspectives and results from paleoclimate observations has proven useful for climate change research, the verification of model outputs and thus future projections. The late Quaternary is characterised by large and abrupt climatic shifts on millennial and centennial time scales, the so-called Dansgaard-Oeschger (D-O) cycles and Heinrich Stadials (HS). Both, the D-O cycle and HS are thought to originate in the North Atlantic and are transmitted through the atmosphere and ocean circulation which results in a near-global footprint. It has been suggested that the abrupt climatic shifts associated with HS are the effect of a reduction in the strength of the Atlantic Meridional Overturning Circulation (AMOC). According to the hypothesis of the bipolar seesaw, a reduction in the AMOC leads to a build-up of heat in the South Atlantic. Although the tropics have the potential to alter the global atmosphere-ocean dynamics through changes in the heat and freshwater balance, little is known of their role in relation to abrupt climate perturbations. This thesis contains a compilation of high-resolution pollen records from South America and Africa covering the last glacial that documents the impact, timing and amplitude of abrupt climate change on the tropical vegetation. This thesis also focuses on the reconstruction of the vegetation, climate and oceanography of southern hemisphere Africa during the last glacial using marine sediments of Ocean Program Drilling Site 1078 (off Angola). Doctoral or Postdoctoral Thesis North Atlantic Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Glacial Angola Pollen Mg/Ca 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
Glacial Angola Pollen Mg/Ca 550 550 Earth sciences and geology ddc:550 Heßler, Ines Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) |
topic_facet |
Glacial Angola Pollen Mg/Ca 550 550 Earth sciences and geology ddc:550 |
description |
In the last decades climate change research became more and more important due to the increasing impact of human activities on the Earth s climate system. The consideration of perspectives and results from paleoclimate observations has proven useful for climate change research, the verification of model outputs and thus future projections. The late Quaternary is characterised by large and abrupt climatic shifts on millennial and centennial time scales, the so-called Dansgaard-Oeschger (D-O) cycles and Heinrich Stadials (HS). Both, the D-O cycle and HS are thought to originate in the North Atlantic and are transmitted through the atmosphere and ocean circulation which results in a near-global footprint. It has been suggested that the abrupt climatic shifts associated with HS are the effect of a reduction in the strength of the Atlantic Meridional Overturning Circulation (AMOC). According to the hypothesis of the bipolar seesaw, a reduction in the AMOC leads to a build-up of heat in the South Atlantic. Although the tropics have the potential to alter the global atmosphere-ocean dynamics through changes in the heat and freshwater balance, little is known of their role in relation to abrupt climate perturbations. This thesis contains a compilation of high-resolution pollen records from South America and Africa covering the last glacial that documents the impact, timing and amplitude of abrupt climate change on the tropical vegetation. This thesis also focuses on the reconstruction of the vegetation, climate and oceanography of southern hemisphere Africa during the last glacial using marine sediments of Ocean Program Drilling Site 1078 (off Angola). |
author2 |
Wefer, Gerold Behling, Hermann |
format |
Doctoral or Postdoctoral Thesis |
author |
Heßler, Ines |
author_facet |
Heßler, Ines |
author_sort |
Heßler, Ines |
title |
Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) |
title_short |
Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) |
title_full |
Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) |
title_fullStr |
Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) |
title_full_unstemmed |
Oceanography, Climate and Vegetation development of tropical Africa during the last glacial: Palynology and geochemistry of marine sediments of ODP Site 1078 (off Angola) |
title_sort |
oceanography, climate and vegetation development of tropical africa during the last glacial: palynology and geochemistry of marine sediments of odp site 1078 (off angola) |
publisher |
Universität Bremen |
publishDate |
2011 |
url |
https://media.suub.uni-bremen.de/handle/elib/115 https://nbn-resolving.org/urn:nbn:de:gbv:46-00101961-15 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/115 urn:nbn:de:gbv:46-00101961-15 |
op_rights |
info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) |
op_rightsnorm |
CC-BY |
_version_ |
1766135930084655104 |