Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology
An ice core was drilled at Taylor dome, East Antarctica, reaching to bedrock at 554 meters. Oxygen-isotope measurements reveal climatic fluctuations through the last interglacial period. To facilitate comparison of the Taylor Dome paleoclimate record with geologic data and results from other deep ic...
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ftunivnotexas:info:ark/67531/metadc690819 2023-05-15T14:00:46+02:00 Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology Steig, E. J. United States. Department of Energy. Office of Energy Research. National Science Foundation (U.S.) 1996-12-31 181 p. Text https://doi.org/10.2172/527444 http://digital.library.unt.edu/ark:/67531/metadc690819/ English eng Washington Univ. other: DE97053346 rep-no: DOE/OR/00033--T698 grantno: AC05-76OR00033 doi:10.2172/527444 osti: 527444 http://digital.library.unt.edu/ark:/67531/metadc690819/ ark: ark:/67531/metadc690819 Other Information: TH: Thesis (Ph.D.) Climatic Change Ecological Concentration Beryllium 10 58 Geosciences Paleoclimatology Ice Caps Geochemistry Antarctica Experimental Data 54 Environmental Sciences Glaciers Report 1996 ftunivnotexas https://doi.org/10.2172/527444 2015-11-07T23:11:40Z An ice core was drilled at Taylor dome, East Antarctica, reaching to bedrock at 554 meters. Oxygen-isotope measurements reveal climatic fluctuations through the last interglacial period. To facilitate comparison of the Taylor Dome paleoclimate record with geologic data and results from other deep ice cores, several glaciological issues need to be addressed. In particular, accumulation data are necessary as input for numerical ice-flow-models, for determining the flux of chemical constituents from measured concentrations, and for calculation of the offset in age between ice and trapped air in the core. The analysis of cosmogenic beryllium-10 provides a geochemical method for constraining the accumulation-rate history at Taylor Dome. High-resolution measurements were made in shallow firn cores and snow pits to determine the relationship among beryllium-10 concentrations, wet and dry deposition mechanisms, and snow-accumulation rates. Comparison between theoretical and measured variations in deposition over the last 75 years constrains the relationship between beryllium-10 deposition and global average production rates. The results indicate that variations in geomagnetically-modulated production-rate do not strongly influence beryllium-10 deposition at Taylor Dome. Although solar modulation of production rate is important for time scales of years to centuries, snow-accumulation rate is the dominant control on ice-core beryllium-10 concentrations for longer periods. Results show that the Taylor Dome core can be used to provide new constraints on regional climate over the last 130,000 years, complementing the terrestrial and marine geological record from the Dry Valley, Transantarctic Mountains and western Ross Sea. Report Antarc* Antarctic Antarctica East Antarctica ice core Ross Sea University of North Texas: UNT Digital Library Antarctic East Antarctica Ross Sea Taylor Dome ENVELOPE(157.667,157.667,-77.667,-77.667) Transantarctic Mountains |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Climatic Change Ecological Concentration Beryllium 10 58 Geosciences Paleoclimatology Ice Caps Geochemistry Antarctica Experimental Data 54 Environmental Sciences Glaciers |
spellingShingle |
Climatic Change Ecological Concentration Beryllium 10 58 Geosciences Paleoclimatology Ice Caps Geochemistry Antarctica Experimental Data 54 Environmental Sciences Glaciers Steig, E. J. Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology |
topic_facet |
Climatic Change Ecological Concentration Beryllium 10 58 Geosciences Paleoclimatology Ice Caps Geochemistry Antarctica Experimental Data 54 Environmental Sciences Glaciers |
description |
An ice core was drilled at Taylor dome, East Antarctica, reaching to bedrock at 554 meters. Oxygen-isotope measurements reveal climatic fluctuations through the last interglacial period. To facilitate comparison of the Taylor Dome paleoclimate record with geologic data and results from other deep ice cores, several glaciological issues need to be addressed. In particular, accumulation data are necessary as input for numerical ice-flow-models, for determining the flux of chemical constituents from measured concentrations, and for calculation of the offset in age between ice and trapped air in the core. The analysis of cosmogenic beryllium-10 provides a geochemical method for constraining the accumulation-rate history at Taylor Dome. High-resolution measurements were made in shallow firn cores and snow pits to determine the relationship among beryllium-10 concentrations, wet and dry deposition mechanisms, and snow-accumulation rates. Comparison between theoretical and measured variations in deposition over the last 75 years constrains the relationship between beryllium-10 deposition and global average production rates. The results indicate that variations in geomagnetically-modulated production-rate do not strongly influence beryllium-10 deposition at Taylor Dome. Although solar modulation of production rate is important for time scales of years to centuries, snow-accumulation rate is the dominant control on ice-core beryllium-10 concentrations for longer periods. Results show that the Taylor Dome core can be used to provide new constraints on regional climate over the last 130,000 years, complementing the terrestrial and marine geological record from the Dry Valley, Transantarctic Mountains and western Ross Sea. |
author2 |
United States. Department of Energy. Office of Energy Research. National Science Foundation (U.S.) |
format |
Report |
author |
Steig, E. J. |
author_facet |
Steig, E. J. |
author_sort |
Steig, E. J. |
title |
Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology |
title_short |
Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology |
title_full |
Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology |
title_fullStr |
Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology |
title_full_unstemmed |
Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology |
title_sort |
beryllium-10 in the taylor dome ice core: applications to antarctic glaciology and paleoclimatology |
publisher |
Washington Univ. |
publishDate |
1996 |
url |
https://doi.org/10.2172/527444 http://digital.library.unt.edu/ark:/67531/metadc690819/ |
long_lat |
ENVELOPE(157.667,157.667,-77.667,-77.667) |
geographic |
Antarctic East Antarctica Ross Sea Taylor Dome Transantarctic Mountains |
geographic_facet |
Antarctic East Antarctica Ross Sea Taylor Dome Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core Ross Sea |
op_source |
Other Information: TH: Thesis (Ph.D.) |
op_relation |
other: DE97053346 rep-no: DOE/OR/00033--T698 grantno: AC05-76OR00033 doi:10.2172/527444 osti: 527444 http://digital.library.unt.edu/ark:/67531/metadc690819/ ark: ark:/67531/metadc690819 |
op_doi |
https://doi.org/10.2172/527444 |
_version_ |
1766270103562747904 |