The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change
The Antarctic Peninsula is one of the most rapidly changing regions in the Cryosphere, with 87% of its glaciers receding and several ice shelves catastrophically collapsing since observations began in the 1960’s. These substantial, well-documented changes in the ice landscape have caused concern for...
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ftriceuniv:oai:scholarship.rice.edu:1911/88211 2023-05-15T13:24:14+02:00 The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change Minzoni, Becky Lynn Anderson, John B Droxler, André Nittrouer, Jeffrey A Rudolf, Volker 2015-12 application/pdf https://hdl.handle.net/1911/88211 eng eng Minzoni, Becky Lynn. "The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change." (2015) Diss., Rice University. https://hdl.handle.net/1911/88211 . https://hdl.handle.net/1911/88211 Antarctica Holocene climate glacimarine sediment polar diatoms glacial stability Thesis Text 2015 ftriceuniv 2022-08-09T20:53:17Z The Antarctic Peninsula is one of the most rapidly changing regions in the Cryosphere, with 87% of its glaciers receding and several ice shelves catastrophically collapsing since observations began in the 1960’s. These substantial, well-documented changes in the ice landscape have caused concern for the mass balance of the Antarctic Peninsula Ice Cap. To better understand the significance of these recent changes, I have assimilated a massive database of new and published marine sedimentary records spanning the Holocene Epoch (the last 11.5 kyrs). The database includes 9 coastal embayments with expanded sedimentary packages and well-dated cores. Each site represents an end-member in the wide range of Antarctic Peninsula oceanography, orography, meteorology, and glacial drainage basin characteristics. Multi-proxy analysis, including sedimentology, geochemistry, and micropaleontology, was conducted at each site to reconstruct glacial history at centennial-scale resolution on par with ice-core data. The coastal sites were then compared in the context published ice-core paleoclimate, paleoceanographic, and glaciological records. The first of these sites, Herbert-Croft Fjord, provides an unparalleled opportunity to compare the marine sediment record with a related ice-core in an Antarctic maritime setting. Herbert-Croft Fjord is the southernmost embayment studied on the eastern side of the Antarctic Peninsula and represents an end-member with a cold, dry atmosphere and cold, saline ocean mass. The record from Herbert-Croft Fjord indicates grounded ice receded quickly and early in the Holocene, followed by a floating ice phase that collapsed 10 ± 2.4 calendar kyrs before present (cal kyr BP, where present day is 1950 A.D.) and never re-advanced. The fjord remained open and productive during the prolonged warm intervals of the Mid Holocene, and began to experience greater glacial influence and sea ice cover during Late Holocene cooling, a period termed the Neoglacial. The second site, Ferrero Bay of the Amundsen Sea, is ... Thesis Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Ice cap ice core Ice Shelves Sea ice Rice University: Digital Scholarship Archive Amundsen Sea Antarctic Antarctic Peninsula Croft ENVELOPE(-57.733,-57.733,-63.975,-63.975) Ferrero Bay ENVELOPE(-102.500,-102.500,-72.500,-72.500) The Antarctic |
institution |
Open Polar |
collection |
Rice University: Digital Scholarship Archive |
op_collection_id |
ftriceuniv |
language |
English |
topic |
Antarctica Holocene climate glacimarine sediment polar diatoms glacial stability |
spellingShingle |
Antarctica Holocene climate glacimarine sediment polar diatoms glacial stability Minzoni, Becky Lynn The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change |
topic_facet |
Antarctica Holocene climate glacimarine sediment polar diatoms glacial stability |
description |
The Antarctic Peninsula is one of the most rapidly changing regions in the Cryosphere, with 87% of its glaciers receding and several ice shelves catastrophically collapsing since observations began in the 1960’s. These substantial, well-documented changes in the ice landscape have caused concern for the mass balance of the Antarctic Peninsula Ice Cap. To better understand the significance of these recent changes, I have assimilated a massive database of new and published marine sedimentary records spanning the Holocene Epoch (the last 11.5 kyrs). The database includes 9 coastal embayments with expanded sedimentary packages and well-dated cores. Each site represents an end-member in the wide range of Antarctic Peninsula oceanography, orography, meteorology, and glacial drainage basin characteristics. Multi-proxy analysis, including sedimentology, geochemistry, and micropaleontology, was conducted at each site to reconstruct glacial history at centennial-scale resolution on par with ice-core data. The coastal sites were then compared in the context published ice-core paleoclimate, paleoceanographic, and glaciological records. The first of these sites, Herbert-Croft Fjord, provides an unparalleled opportunity to compare the marine sediment record with a related ice-core in an Antarctic maritime setting. Herbert-Croft Fjord is the southernmost embayment studied on the eastern side of the Antarctic Peninsula and represents an end-member with a cold, dry atmosphere and cold, saline ocean mass. The record from Herbert-Croft Fjord indicates grounded ice receded quickly and early in the Holocene, followed by a floating ice phase that collapsed 10 ± 2.4 calendar kyrs before present (cal kyr BP, where present day is 1950 A.D.) and never re-advanced. The fjord remained open and productive during the prolonged warm intervals of the Mid Holocene, and began to experience greater glacial influence and sea ice cover during Late Holocene cooling, a period termed the Neoglacial. The second site, Ferrero Bay of the Amundsen Sea, is ... |
author2 |
Anderson, John B Droxler, André Nittrouer, Jeffrey A Rudolf, Volker |
format |
Thesis |
author |
Minzoni, Becky Lynn |
author_facet |
Minzoni, Becky Lynn |
author_sort |
Minzoni, Becky Lynn |
title |
The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change |
title_short |
The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change |
title_full |
The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change |
title_fullStr |
The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change |
title_full_unstemmed |
The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change |
title_sort |
antarctic peninsula's response to holocene climate variability: controls on glacial stability and implications for future change |
publishDate |
2015 |
url |
https://hdl.handle.net/1911/88211 |
long_lat |
ENVELOPE(-57.733,-57.733,-63.975,-63.975) ENVELOPE(-102.500,-102.500,-72.500,-72.500) |
geographic |
Amundsen Sea Antarctic Antarctic Peninsula Croft Ferrero Bay The Antarctic |
geographic_facet |
Amundsen Sea Antarctic Antarctic Peninsula Croft Ferrero Bay The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Ice cap ice core Ice Shelves Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Peninsula Antarctica Ice cap ice core Ice Shelves Sea ice |
op_relation |
Minzoni, Becky Lynn. "The Antarctic Peninsula's Response to Holocene Climate Variability: Controls on Glacial Stability and Implications for Future Change." (2015) Diss., Rice University. https://hdl.handle.net/1911/88211 . https://hdl.handle.net/1911/88211 |
_version_ |
1766378252404785152 |