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

Winter, K; Woodward, J; Dunning, SA; Turney, CSM; Fogwill, CJ; Hein, AS; Golledge, NR; Bingham, RG; Marrero, SM; Sugden, DE; Ross, N

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

Winter, K Woodward, J Dunning, SA Turney, CSM Fogwill, CJ Hein, AS Golledge, NR Bingham, RG Marrero, SM Sugden, DE Ross, N

Permalink

Publisher:: AMER GEOPHYSICAL UNION
Publication Type:: Journal Article
Citation:: Geophysical Research Letters, 2016, 43, (5), pp. 2019-2026
Issue Date:: 2016-03-16

Closed Access

	Filename	Description	Size
	Geophysical Research Letters - 2016 - Winter - Assessing the continuity of the blue ice climate record at Patriot Hills .pdf	Published version	1.77 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Winter, K
dc.contributor.author	Woodward, J
dc.contributor.author	Dunning, SA
dc.contributor.author	Turney, CSM
dc.contributor.author	Fogwill, CJ
dc.contributor.author	Hein, AS
dc.contributor.author	Golledge, NR
dc.contributor.author	Bingham, RG
dc.contributor.author	Marrero, SM
dc.contributor.author	Sugden, DE
dc.contributor.author	Ross, N
dc.date.accessioned	2022-08-16T06:47:45Z
dc.date.available	2022-08-16T06:47:45Z
dc.date.issued	2016-03-16
dc.identifier.citation	Geophysical Research Letters, 2016, 43, (5), pp. 2019-2026
dc.identifier.issn	0094-8276
dc.identifier.issn	1944-8007
dc.identifier.uri	http://hdl.handle.net/10453/160360
dc.description.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 unconformities 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 paleoflow dynamics and interpreting BIA climate records.
dc.language	English
dc.publisher	AMER GEOPHYSICAL UNION
dc.relation	http://purl.org/au-research/grants/arc/FL100100195
dc.relation.ispartof	Geophysical Research Letters
dc.relation.isbasedon	10.1002/2015GL066476
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.title	Assessing the continuity of the blue ice climate record at Patriot Hills, Horseshoe Valley, West Antarctica
dc.type	Journal Article
utslib.citation.volume	43
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/DVC (Research)
utslib.copyright.status	closed_access	*
dc.date.updated	2022-08-16T06:47:44Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	43
utslib.citation.issue	5

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 unconformities 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 paleoflow dynamics and interpreting BIA climate records.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/160360