Assessing the continuity of the blue ice climate record at Patriot Hills, Horseshoe Valley, West Antarctica

Winter, Kate, Woodward, John, Dunning, Stuart, Turney, Chris, Fogwill, Christopher, Hein, Andrew, Golledge, Nicholas, Bingham, Robert, Marrero, Shasta, Sugden, David and Ross, Neil (2016) Assessing the continuity of the blue ice climate record at Patriot Hills, Horseshoe Valley, West Antarctica. Geophysical Research Letters, 43 (5). pp. 2019-2026. ISSN ‎0094-8276

[img]
Preview
Text (Full text)
Winter_et_al-2016-Geophysical_Research_Letters.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (1MB) | Preview
[img] Text (Full text)
2015GL066476R_revised_manuscript.docx - Accepted Version

Download (63kB)
Official URL: http://dx.doi.org/10.1002/2015GL066476

Abstract

We use high resolution Ground Penetrating Radar (GPR) to assess the continuity of the Blue Ice Area (BIA) horizontal climate record at Patriot Hills, Horseshoe Valley, West Antarctica. The sequence contains three pronounced changes in deuterium isotopic values at ~18 cal ka, ~12 cal ka and ~8 cal ka. GPR surveys along the climate sequence reveal continuous, conformable dipping isochrones, separated by two unconformities in the isochrone layers, which correlate with the two older deuterium shifts. We interpret these incursions as discontinuities in the sequence, rather than direct measures of climate change. Ice-sheet models and Internal Layer Continuity Index plots suggest that the unconformities represent periods of erosion occurring as the former ice surface was scoured by katabatic winds in front of mountains at the head of Horseshoe Valley. This study demonstrates the importance of high resolution GPR surveys for investigating both paleo-flow dynamics and interpreting BIA climate records.

Item Type: Article
Uncontrolled Keywords: Climate Record, Blue Ice Area, Ground Penetrating Radar, Katabatic Winds, Antarctica, Unconformities
Subjects: F800 Physical and Terrestrial Geographical and Environmental Sciences
Department: Faculties > Engineering and Environment > Geography and Environmental Sciences
Depositing User: Paul Burns
Date Deposited: 12 Feb 2016 11:56
Last Modified: 18 May 2017 08:30
URI: http://nrl.northumbria.ac.uk/id/eprint/26004

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence