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Accumulation patterns around Dome C, East Antarctica, in the last 73 kyr

Citation

Cavitte, MGP and Parrenin, F and Ritz, C and Young, A and Van Liefferinge, B and Blankenship, DD and Frezzotti, M and Roberts, JL, Accumulation patterns around Dome C, East Antarctica, in the last 73 kyr, Cryosphere, 12, (4) pp. 1401-1414. ISSN 1994-0416 (2018) [Refereed Article]


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Copyright Statement

© Author(s) 2018. Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/

DOI: doi:10.5194/tc-12-1401-2018

Abstract

We reconstruct the pattern of surface accumulation in the region around Dome C, East Antarctica, since the last glacial. We use a set of 18 isochrones spanning all observable depths of the ice column, interpreted from various ice-penetrating radar surveys and a 1-D ice flow model to invert for accumulation rates in the region. The shallowest four isochrones are then used to calculate paleoaccumulation rates between isochrone pairs using a 1-D assumption where horizontal advection is negligible in the time interval of each layer. We observe that the large-scale (100skm) surface accumulation gradient is spatially stable through the last 73kyr, which reflects current modeled and observed precipitation gradients in the region. We also observe small-scale (10skm) accumulation variations linked to snow redistribution at the surface, due to changes in its slope and curvature in the prevailing wind direction that remain spatially stationary since the last glacial.

Item Details

Item Type:Refereed Article
Keywords:Dome C, Antarctica, ice core
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Effects of Climate Change and Variability on Antarctic and Sub-Antarctic Environments (excl. Social Impacts)
UTAS Author:Roberts, JL (Dr Jason Roberts)
ID Code:131769
Year Published:2018
Web of Science® Times Cited:4
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2019-04-04
Last Modified:2019-05-06
Downloads:7 View Download Statistics

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