Antarctic ice sheet expansions in the Middle Miocene and Pliocene
This study focuses on the interactions between climate and ice sheets in order to obtain a better understanding of the processes involved. Two periods in the geological past are explored; the Middle Miocene and the mid-Pliocene. For both periods, foraminiferal oxygen-isotope records from deep-sea se...
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ftsubggeo:oai:e-docs.geo-leo.de:11858/00-1735-0000-0001-3192-7 2024-06-09T07:39:03+00:00 Antarctic ice sheet expansions in the Middle Miocene and Pliocene Langebroek, Petra 2008 137 S. application/pdf http://hdl.handle.net/11858/00-1735-0000-0001-3192-7 https://doi.org/10.23689/fidgeo-264 eng eng Univ. Bremen Geophysik doi:10.23689/fidgeo-264 596073356 http://hdl.handle.net/11858/00-1735-0000-0001-3192-7 http://e-docs.geo-leo.de/rights ddc:551.69 ddc:551 ddc:550 doc-type:book publishedVersion 2008 ftsubggeo https://doi.org/10.23689/fidgeo-264 2024-05-10T04:57:11Z This study focuses on the interactions between climate and ice sheets in order to obtain a better understanding of the processes involved. Two periods in the geological past are explored; the Middle Miocene and the mid-Pliocene. For both periods, foraminiferal oxygen-isotope records from deep-sea sediment cores as well as stratigraphical data, suggest a global sea-level lowering. The magnitude of these reductions in sea level indicate large-scale ice-sheet build-up. However, the origin of these events and even the geographic locations of the ice sheets, are still under discussion. The ice sheet-climate model developed in this study provides a tool to test some of the hypotheses brought forward to explain the ice-sheet expansion events. It describes the Antarctic ice sheet and is forced by a climate component based on energy and mass balances. Further more, the model computes the oxygen-isotopic composition of the ice-sheet, thereby providing the possibility to compare numerical results directly to deep-sea sediment records. Numerical experiments focus on the interactions between atmospheric CO2, temperature, ice volume (sea-level equivalent) and the isotopic composition of sea water. thesis Book Antarc* Antarctic Ice Sheet GEO-LEOe-docs (FID GEO) Antarctic The Antarctic |
institution |
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GEO-LEOe-docs (FID GEO) |
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ftsubggeo |
language |
English |
topic |
ddc:551.69 ddc:551 ddc:550 |
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ddc:551.69 ddc:551 ddc:550 Langebroek, Petra Antarctic ice sheet expansions in the Middle Miocene and Pliocene |
topic_facet |
ddc:551.69 ddc:551 ddc:550 |
description |
This study focuses on the interactions between climate and ice sheets in order to obtain a better understanding of the processes involved. Two periods in the geological past are explored; the Middle Miocene and the mid-Pliocene. For both periods, foraminiferal oxygen-isotope records from deep-sea sediment cores as well as stratigraphical data, suggest a global sea-level lowering. The magnitude of these reductions in sea level indicate large-scale ice-sheet build-up. However, the origin of these events and even the geographic locations of the ice sheets, are still under discussion. The ice sheet-climate model developed in this study provides a tool to test some of the hypotheses brought forward to explain the ice-sheet expansion events. It describes the Antarctic ice sheet and is forced by a climate component based on energy and mass balances. Further more, the model computes the oxygen-isotopic composition of the ice-sheet, thereby providing the possibility to compare numerical results directly to deep-sea sediment records. Numerical experiments focus on the interactions between atmospheric CO2, temperature, ice volume (sea-level equivalent) and the isotopic composition of sea water. thesis |
format |
Book |
author |
Langebroek, Petra |
author_facet |
Langebroek, Petra |
author_sort |
Langebroek, Petra |
title |
Antarctic ice sheet expansions in the Middle Miocene and Pliocene |
title_short |
Antarctic ice sheet expansions in the Middle Miocene and Pliocene |
title_full |
Antarctic ice sheet expansions in the Middle Miocene and Pliocene |
title_fullStr |
Antarctic ice sheet expansions in the Middle Miocene and Pliocene |
title_full_unstemmed |
Antarctic ice sheet expansions in the Middle Miocene and Pliocene |
title_sort |
antarctic ice sheet expansions in the middle miocene and pliocene |
publisher |
Univ. Bremen |
publishDate |
2008 |
url |
http://hdl.handle.net/11858/00-1735-0000-0001-3192-7 https://doi.org/10.23689/fidgeo-264 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_relation |
Geophysik doi:10.23689/fidgeo-264 596073356 http://hdl.handle.net/11858/00-1735-0000-0001-3192-7 |
op_rights |
http://e-docs.geo-leo.de/rights |
op_doi |
https://doi.org/10.23689/fidgeo-264 |
_version_ |
1801376881014996992 |