Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica
The current interglacial, the Holocene, is a key time period for understanding global climate change, because climate variations occurred in the absence of large Northern Hemisphere ice sheets. Most of the research and our understanding of Holocene climate variability are derived from records that w...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:etd-2172 2023-06-11T04:05:16+02:00 Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica Bamberg, Audrey 2007-01-01T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/etd/1166 https://digitalcommons.library.umaine.edu/context/etd/article/2172/viewcontent/BambergA2007.pdf unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/etd/1166 https://digitalcommons.library.umaine.edu/context/etd/article/2172/viewcontent/BambergA2007.pdf Electronic Theses and Dissertations Climatic changes Ross Sea (Antarctica) Holocence (Quarternary Studies) Climate Oceanography and Atmospheric Sciences and Meteorology text 2007 ftmaineuniv 2023-05-04T18:00:59Z The current interglacial, the Holocene, is a key time period for understanding global climate change, because climate variations occurred in the absence of large Northern Hemisphere ice sheets. Most of the research and our understanding of Holocene climate variability are derived from records that were collected in the Northern Hemisphere. The small number of Holocene records from the Southern Hemisphere limits our understanding about the timing and characteristics of climate events between the polar hemispheres that are crucial for discriminating among hypotheses of Holocene variability. Reconstructions of Holocene climate variability in Antarctica are rare and generally based on ice-core geochemistry. My goal is to develop a record of Holocene environmental change from the southern high latitudes, which will complement existing studies. The present study has two major objectives. The first is to determine the processes that created the raised beaches along the Southern Victoria Land coast (SVLC) to determine the oceanic environment at the time of their formation. The second is to compare my environmental reconstruction to the presence of southern elephant seals (SES) and Adelie penguins that colonized these beaches during the Holocene. My results indicate that all beaches along the SVLC were formed during storm events. My data indicates that during three intervals at 800 to 1700, 3300 to 3600 and 5250 to 6500 cal yr. BP, beaches were formed by more intense storms. There are two hypotheses to explain these phases. One is that a reduction in sea ice during these times allowed normal storms to leave the same geologic signature as more intense storms that occurred during times of extensive sea ice. This is because sea ice has a dampening effect on storm energy. The other possibility is that the more intense storms were the result of the movement of the polar vortex at times when the climate was in transition from a warm to a cold phase or vice versa. The geologic data from this study favors the latter ... Text Antarc* Antarctica Elephant Seals ice core Ross Sea Sea ice Southern Elephant Seals Victoria Land The University of Maine: DigitalCommons@UMaine Ross Sea Victoria Land |
institution |
Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Climatic changes Ross Sea (Antarctica) Holocence (Quarternary Studies) Climate Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Climatic changes Ross Sea (Antarctica) Holocence (Quarternary Studies) Climate Oceanography and Atmospheric Sciences and Meteorology Bamberg, Audrey Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica |
topic_facet |
Climatic changes Ross Sea (Antarctica) Holocence (Quarternary Studies) Climate Oceanography and Atmospheric Sciences and Meteorology |
description |
The current interglacial, the Holocene, is a key time period for understanding global climate change, because climate variations occurred in the absence of large Northern Hemisphere ice sheets. Most of the research and our understanding of Holocene climate variability are derived from records that were collected in the Northern Hemisphere. The small number of Holocene records from the Southern Hemisphere limits our understanding about the timing and characteristics of climate events between the polar hemispheres that are crucial for discriminating among hypotheses of Holocene variability. Reconstructions of Holocene climate variability in Antarctica are rare and generally based on ice-core geochemistry. My goal is to develop a record of Holocene environmental change from the southern high latitudes, which will complement existing studies. The present study has two major objectives. The first is to determine the processes that created the raised beaches along the Southern Victoria Land coast (SVLC) to determine the oceanic environment at the time of their formation. The second is to compare my environmental reconstruction to the presence of southern elephant seals (SES) and Adelie penguins that colonized these beaches during the Holocene. My results indicate that all beaches along the SVLC were formed during storm events. My data indicates that during three intervals at 800 to 1700, 3300 to 3600 and 5250 to 6500 cal yr. BP, beaches were formed by more intense storms. There are two hypotheses to explain these phases. One is that a reduction in sea ice during these times allowed normal storms to leave the same geologic signature as more intense storms that occurred during times of extensive sea ice. This is because sea ice has a dampening effect on storm energy. The other possibility is that the more intense storms were the result of the movement of the polar vortex at times when the climate was in transition from a warm to a cold phase or vice versa. The geologic data from this study favors the latter ... |
format |
Text |
author |
Bamberg, Audrey |
author_facet |
Bamberg, Audrey |
author_sort |
Bamberg, Audrey |
title |
Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica |
title_short |
Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica |
title_full |
Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica |
title_fullStr |
Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica |
title_full_unstemmed |
Geologic and Biologic Indicators of Climate Change in the Ross Sea, Antarctica |
title_sort |
geologic and biologic indicators of climate change in the ross sea, antarctica |
publisher |
DigitalCommons@UMaine |
publishDate |
2007 |
url |
https://digitalcommons.library.umaine.edu/etd/1166 https://digitalcommons.library.umaine.edu/context/etd/article/2172/viewcontent/BambergA2007.pdf |
geographic |
Ross Sea Victoria Land |
geographic_facet |
Ross Sea Victoria Land |
genre |
Antarc* Antarctica Elephant Seals ice core Ross Sea Sea ice Southern Elephant Seals Victoria Land |
genre_facet |
Antarc* Antarctica Elephant Seals ice core Ross Sea Sea ice Southern Elephant Seals Victoria Land |
op_source |
Electronic Theses and Dissertations |
op_relation |
https://digitalcommons.library.umaine.edu/etd/1166 https://digitalcommons.library.umaine.edu/context/etd/article/2172/viewcontent/BambergA2007.pdf |
_version_ |
1768373613006684160 |