Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf
The Amundsen Sea sector of the largely marine-based West Antarctic Ice Sheet is currently subject to the most rapid changes in the global cryosphere. Ice streams here are marine-based on slopes that significantly deepen inland, thus are susceptible to increased future ice mass loss, directly resulti...
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Universität Bremen
2014
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/653 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103732-12 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/653 2023-05-15T13:23:39+02:00 Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf Dynamik des Westantarktischen Eisschildes während des Spätquartärs: Fernerkundung und Substratstudien an Paläo-Eisschildbetten des Amundsenmeer-Schelfes Klages, Johann Philipp Tiedemann, Ralf Spiegel, Cornelia 2014-04-01 application/pdf https://media.suub.uni-bremen.de/handle/elib/653 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103732-12 eng eng Universität Bremen FB5 Geowissenschaften https://media.suub.uni-bremen.de/handle/elib/653 urn:nbn:de:gbv:46-00103732-12 info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) CC-BY West Antarctic Ice Sheet Amundsen Sea Pine Island Bay Last Glacial Maximum Ice Sheet Reconstruction LGM extent Ice Sheet Modeling Sea-level rise 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2014 ftsubbremen 2022-11-09T07:09:25Z The Amundsen Sea sector of the largely marine-based West Antarctic Ice Sheet is currently subject to the most rapid changes in the global cryosphere. Ice streams here are marine-based on slopes that significantly deepen inland, thus are susceptible to increased future ice mass loss, directly resulting in a rising sea-level of up to 3.4 m (Fretwell et al. 2013). However, state-of-the-art ice sheet models that aim to elucidate these future scenarios are only initialised with observational data covering the past 30-40 years (e.g. Favier et al. 2014), thus excluding long-term empirical data of ice sheet change spanning the Last Glacial Maximum and the subsequent deglacial period. To test the reliability of predicted future scenarios it is essential to validate models against past ice sheet configurations confirmed by empirical data from palaeo-ice sheet beds on modern Antarctic continental shelves. Attempts at reproducing the LGM ice sheet (Golledge et al. 2013), have revealed considerable mismatches between model simulations and empirical data, mainly due a lack of comprehensive palaeo-glaciological data particularly from outer continental shelves and regions in between the large palaeo-ice stream troughs, regions known as inter-ice stream ridges. This thesis presents the mapping and detailed analysis of new marine geophysical and geological data from three formerly unstudied regions on the Amundsen Sea shelf that significantly improve our understanding of Antarctic palaeo-ice sheet dynamics and will ultimately help to better understand West Antarctic Ice Sheet dynamics during and since the Last Glacial Maximum. The new information will significantly add to a hitherto sparse database of previous work, helping to test, validate, and improve ice sheet models in the vital region of the Amundsen Sea. Only by enhancing their ability to simulate past ice sheet configurations more accurately will more reliable predictions of the future evolution of these dramatically changing parts of the West Antarctic Ice Sheet be ... Doctoral or Postdoctoral Thesis Amundsen Sea Antarc* Antarctic Eisschild* Ice Sheet Pine Island Bay Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Amundsen Sea Antarctic Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) West Antarctic Ice Sheet |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
West Antarctic Ice Sheet Amundsen Sea Pine Island Bay Last Glacial Maximum Ice Sheet Reconstruction LGM extent Ice Sheet Modeling Sea-level rise 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
West Antarctic Ice Sheet Amundsen Sea Pine Island Bay Last Glacial Maximum Ice Sheet Reconstruction LGM extent Ice Sheet Modeling Sea-level rise 550 550 Earth sciences and geology ddc:550 Klages, Johann Philipp Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf |
topic_facet |
West Antarctic Ice Sheet Amundsen Sea Pine Island Bay Last Glacial Maximum Ice Sheet Reconstruction LGM extent Ice Sheet Modeling Sea-level rise 550 550 Earth sciences and geology ddc:550 |
description |
The Amundsen Sea sector of the largely marine-based West Antarctic Ice Sheet is currently subject to the most rapid changes in the global cryosphere. Ice streams here are marine-based on slopes that significantly deepen inland, thus are susceptible to increased future ice mass loss, directly resulting in a rising sea-level of up to 3.4 m (Fretwell et al. 2013). However, state-of-the-art ice sheet models that aim to elucidate these future scenarios are only initialised with observational data covering the past 30-40 years (e.g. Favier et al. 2014), thus excluding long-term empirical data of ice sheet change spanning the Last Glacial Maximum and the subsequent deglacial period. To test the reliability of predicted future scenarios it is essential to validate models against past ice sheet configurations confirmed by empirical data from palaeo-ice sheet beds on modern Antarctic continental shelves. Attempts at reproducing the LGM ice sheet (Golledge et al. 2013), have revealed considerable mismatches between model simulations and empirical data, mainly due a lack of comprehensive palaeo-glaciological data particularly from outer continental shelves and regions in between the large palaeo-ice stream troughs, regions known as inter-ice stream ridges. This thesis presents the mapping and detailed analysis of new marine geophysical and geological data from three formerly unstudied regions on the Amundsen Sea shelf that significantly improve our understanding of Antarctic palaeo-ice sheet dynamics and will ultimately help to better understand West Antarctic Ice Sheet dynamics during and since the Last Glacial Maximum. The new information will significantly add to a hitherto sparse database of previous work, helping to test, validate, and improve ice sheet models in the vital region of the Amundsen Sea. Only by enhancing their ability to simulate past ice sheet configurations more accurately will more reliable predictions of the future evolution of these dramatically changing parts of the West Antarctic Ice Sheet be ... |
author2 |
Tiedemann, Ralf Spiegel, Cornelia |
format |
Doctoral or Postdoctoral Thesis |
author |
Klages, Johann Philipp |
author_facet |
Klages, Johann Philipp |
author_sort |
Klages, Johann Philipp |
title |
Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf |
title_short |
Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf |
title_full |
Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf |
title_fullStr |
Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf |
title_full_unstemmed |
Late Quaternary West Antarctic Ice Sheet Dynamics: Remote Sensing and Substrate Studies of Palaeo-Ice Sheet Beds on the Amundsen Sea Shelf |
title_sort |
late quaternary west antarctic ice sheet dynamics: remote sensing and substrate studies of palaeo-ice sheet beds on the amundsen sea shelf |
publisher |
Universität Bremen |
publishDate |
2014 |
url |
https://media.suub.uni-bremen.de/handle/elib/653 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103732-12 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Amundsen Sea Antarctic Island Bay Pine Island Bay West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Island Bay Pine Island Bay West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Eisschild* Ice Sheet Pine Island Bay |
genre_facet |
Amundsen Sea Antarc* Antarctic Eisschild* Ice Sheet Pine Island Bay |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/653 urn:nbn:de:gbv:46-00103732-12 |
op_rights |
info:eu-repo/semantics/openAccess Bitte wählen Sie eine Lizenz aus: (Unsere Empfehlung: CC-BY) |
op_rightsnorm |
CC-BY |
_version_ |
1766373860224008192 |