Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau
Isochronal layers in firn detected with ground-penetrating radar (GPR) and dated using results from ice-core analyses are used to calculate accumulation rates along a 100 km across-flow profile in West Antarctica. Accumulation rates are shown to be highly variable over short distances. Elevation mea...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1213 2023-05-15T14:01:35+02:00 Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau Spikes, Vandy B. Hamilton, Gordon S. Arcone, Steven A. Kaspari, Susan Mayewski, Paul Andrew 2004-01-01T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/208 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1213&context=ers_facpub unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/208 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1213&context=ers_facpub This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Glaciogeology Geochemistry Glaciology Cryology Climate Change Atmospheric Sciences Climate Hydrology text 2004 ftmaineuniv 2023-03-12T18:54:32Z Isochronal layers in firn detected with ground-penetrating radar (GPR) and dated using results from ice-core analyses are used to calculate accumulation rates along a 100 km across-flow profile in West Antarctica. Accumulation rates are shown to be highly variable over short distances. Elevation measurements from global positioning system surveys show that accumulation rates derived from shallow horizons correlate well with surface undulations, which implies that wind redistribution of snow is the leading cause of this variability. Temporal changes in accumulation rate over 25-185 year intervals are smoothed to along-track length scales comparable to surface undulations in order to identify trends in accumulation that are likely related to changes in climate. Results show that accumulation rates along this profile have decreased in recent decades, which is consistent with core-derived time series of annual accumulation rates measured at the two ends of the radar profile. These results suggest that temporal variability observed in accumulation-rate records from ice cores and GPR profiles can be obscured by spatial influences, although it is possible to resolve temporal signals if the effects of local topography and ice flow are quantified and removed. Text Antarc* Antarctic Antarctica ice core West Antarctica The University of Maine: DigitalCommons@UMaine Antarctic West Antarctica |
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Open Polar |
collection |
The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Glaciogeology Geochemistry Glaciology Cryology Climate Change Atmospheric Sciences Climate Hydrology |
spellingShingle |
Glaciogeology Geochemistry Glaciology Cryology Climate Change Atmospheric Sciences Climate Hydrology Spikes, Vandy B. Hamilton, Gordon S. Arcone, Steven A. Kaspari, Susan Mayewski, Paul Andrew Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau |
topic_facet |
Glaciogeology Geochemistry Glaciology Cryology Climate Change Atmospheric Sciences Climate Hydrology |
description |
Isochronal layers in firn detected with ground-penetrating radar (GPR) and dated using results from ice-core analyses are used to calculate accumulation rates along a 100 km across-flow profile in West Antarctica. Accumulation rates are shown to be highly variable over short distances. Elevation measurements from global positioning system surveys show that accumulation rates derived from shallow horizons correlate well with surface undulations, which implies that wind redistribution of snow is the leading cause of this variability. Temporal changes in accumulation rate over 25-185 year intervals are smoothed to along-track length scales comparable to surface undulations in order to identify trends in accumulation that are likely related to changes in climate. Results show that accumulation rates along this profile have decreased in recent decades, which is consistent with core-derived time series of annual accumulation rates measured at the two ends of the radar profile. These results suggest that temporal variability observed in accumulation-rate records from ice cores and GPR profiles can be obscured by spatial influences, although it is possible to resolve temporal signals if the effects of local topography and ice flow are quantified and removed. |
format |
Text |
author |
Spikes, Vandy B. Hamilton, Gordon S. Arcone, Steven A. Kaspari, Susan Mayewski, Paul Andrew |
author_facet |
Spikes, Vandy B. Hamilton, Gordon S. Arcone, Steven A. Kaspari, Susan Mayewski, Paul Andrew |
author_sort |
Spikes, Vandy B. |
title |
Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau |
title_short |
Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau |
title_full |
Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau |
title_fullStr |
Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau |
title_full_unstemmed |
Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau |
title_sort |
variability in accumulation rates from gpr profiling on the west antarctic plateau |
publisher |
DigitalCommons@UMaine |
publishDate |
2004 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/208 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1213&context=ers_facpub |
geographic |
Antarctic West Antarctica |
geographic_facet |
Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica ice core West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica ice core West Antarctica |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/208 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1213&context=ers_facpub |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
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1766271495890272256 |