Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica
Studying the history of ice-sheet behavior in Antarctica’s largest drainage basin, the Ross Sea, can improve understanding of patterns, timing, and controls on marine-based ice-sheet dynamics, and provide constraints on numerical ice-sheet models. Newly collected high-resolution multibeam swath bath...
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ftriceuniv:oai:scholarship.rice.edu:1911/96244 2023-05-15T13:39:43+02:00 Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica Halberstadt, Anna Ruth Weston Anderson, John B 2016-05 application/pdf https://hdl.handle.net/1911/96244 eng eng Halberstadt, Anna Ruth Weston. "Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica." (2016) Master’s Thesis, Rice University. https://hdl.handle.net/1911/96244 . https://hdl.handle.net/1911/96244 Glacial geomorphology Antarctica Last Glacial Maximum ice sheet ice dynamics grounding line stability sedimentology Ross Sea ice sheet reconstruction Thesis Text 2016 ftriceuniv 2022-08-09T20:33:03Z Studying the history of ice-sheet behavior in Antarctica’s largest drainage basin, the Ross Sea, can improve understanding of patterns, timing, and controls on marine-based ice-sheet dynamics, and provide constraints on numerical ice-sheet models. Newly collected high-resolution multibeam swath bathymetry data, combined with two decades of legacy multibeam and seismic data, are used to map glacial landforms and reconstruct paleodrainage. Last Glacial Maximum grounded ice reached the continental shelf edge in the eastern but not western Ross Sea. Recessional geomorphic features in the western Ross Sea indicate virtually continuous retreat of the ice sheet in contact with the bed. In the eastern Ross Sea, well-preserved linear features and a lack of small-scale recessional landforms record rapid lift-off of grounded ice from the bed. Physiography exerted a first-order control on ice behavior, while seafloor geology played an important subsidiary role. This new analysis of retreat patterns suggests that: (1) a large embayment formed in the eastern Ross Sea; (2) retreat was complex and asynchronous between troughs; and (3) the eastern Ross Sea largely deglaciated prior to the western Ross Sea. Previously published grounding-line retreat scenarios are based on terrestrial observations; however, this work uses Ross Sea-wide geomorphology to constrain marine deglaciation. Thesis Antarc* Antarctica Ice Sheet Ross Sea Sea ice Rice University: Digital Scholarship Archive Ross Sea |
institution |
Open Polar |
collection |
Rice University: Digital Scholarship Archive |
op_collection_id |
ftriceuniv |
language |
English |
topic |
Glacial geomorphology Antarctica Last Glacial Maximum ice sheet ice dynamics grounding line stability sedimentology Ross Sea ice sheet reconstruction |
spellingShingle |
Glacial geomorphology Antarctica Last Glacial Maximum ice sheet ice dynamics grounding line stability sedimentology Ross Sea ice sheet reconstruction Halberstadt, Anna Ruth Weston Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica |
topic_facet |
Glacial geomorphology Antarctica Last Glacial Maximum ice sheet ice dynamics grounding line stability sedimentology Ross Sea ice sheet reconstruction |
description |
Studying the history of ice-sheet behavior in Antarctica’s largest drainage basin, the Ross Sea, can improve understanding of patterns, timing, and controls on marine-based ice-sheet dynamics, and provide constraints on numerical ice-sheet models. Newly collected high-resolution multibeam swath bathymetry data, combined with two decades of legacy multibeam and seismic data, are used to map glacial landforms and reconstruct paleodrainage. Last Glacial Maximum grounded ice reached the continental shelf edge in the eastern but not western Ross Sea. Recessional geomorphic features in the western Ross Sea indicate virtually continuous retreat of the ice sheet in contact with the bed. In the eastern Ross Sea, well-preserved linear features and a lack of small-scale recessional landforms record rapid lift-off of grounded ice from the bed. Physiography exerted a first-order control on ice behavior, while seafloor geology played an important subsidiary role. This new analysis of retreat patterns suggests that: (1) a large embayment formed in the eastern Ross Sea; (2) retreat was complex and asynchronous between troughs; and (3) the eastern Ross Sea largely deglaciated prior to the western Ross Sea. Previously published grounding-line retreat scenarios are based on terrestrial observations; however, this work uses Ross Sea-wide geomorphology to constrain marine deglaciation. |
author2 |
Anderson, John B |
format |
Thesis |
author |
Halberstadt, Anna Ruth Weston |
author_facet |
Halberstadt, Anna Ruth Weston |
author_sort |
Halberstadt, Anna Ruth Weston |
title |
Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica |
title_short |
Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica |
title_full |
Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica |
title_fullStr |
Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica |
title_full_unstemmed |
Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica |
title_sort |
paleo-ice stream behavior: retreat scenarios and changing controls in the ross sea, antarctica |
publishDate |
2016 |
url |
https://hdl.handle.net/1911/96244 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Ice Sheet Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ice Sheet Ross Sea Sea ice |
op_relation |
Halberstadt, Anna Ruth Weston. "Paleo-Ice Stream Behavior: Retreat Scenarios and Changing Controls in the Ross Sea, Antarctica." (2016) Master’s Thesis, Rice University. https://hdl.handle.net/1911/96244 . https://hdl.handle.net/1911/96244 |
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1766122565898600448 |