Document Type
Article
Publication Title
Annals of Glaciology
Publisher
International Glaciology Society
Rights and Access Note
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).
Publication Date
2004
First Page
238
Last Page
244
Issue Number
1
Volume Number
39
Abstract/ Summary
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.
Repository Citation
Spikes, Vandy B.; Hamilton, Gordon S.; Arcone, Steven A.; Kaspari, Susan; and Mayewski, Paul Andrew, "Variability in Accumulation Rates from GPR Profiling on the West Antarctic Plateau" (2004). Earth Science Faculty Scholarship. 208.
https://digitalcommons.library.umaine.edu/ers_facpub/208
Citation/Publisher Attribution
Spikes, V. B., Hamilton, G. S., Arcone, S. A., Kaspari, S., & Mayewski, P. A. (2004). Variability in accumulation rates from GPR profiling on the West Antarctic plateau. Annals of Glaciology. 39(1), 238-244.
Publisher Statement
© Copyright 2004 International Glaciology Society
DOI
10.3189/172756404781814393
Version
publisher's version of the published document
Included in
Atmospheric Sciences Commons, Climate Commons, Geochemistry Commons, Glaciology Commons, Hydrology Commons
Rights Statement
