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Ice thickness over the southern limit of the Amery Ice Shelf, East Antarctica, and reassessment of the mass balance of the central portion of the Lambert Glacier–Amery Ice Shelf system

Citation

Wen, J and Huang, L and Wang, W and Jacka, TH and Damm, V and Yan, L, Ice thickness over the southern limit of the Amery Ice Shelf, East Antarctica, and reassessment of the mass balance of the central portion of the Lambert Glacier-Amery Ice Shelf system, Annals of Glaciology, 55, (66) pp. 81-86. ISSN 0260-3055 (2014) [Refereed Article]


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Copyright Statement

Copyright 2014 International Glaciological Society

DOI: doi:10.3189/2014AoG66A154

Abstract

We combine radio-echo sounding ice thickness data from the BEDMAP Project database and the PCMEGA (Prince Charles Mountains Expedition of Germany and Australia) dataset to generate a new ice thickness grid for the southern limit region of the Amery Ice Shelf, East Antarctica. We then reassess the mass balance of the central portion of the Lambert–Amery system, incorporating flow information derived from synthetic aperture radar interferometry (InSAR) and a modeled surface mass-balance dataset based on regional atmospheric modeling. Our analysis reveals that Mellor and Fisher Glaciers are approximately in balance to the level of our measurement uncertainty, while Lambert Glacier has a positive imbalance of 4.2 ± 2.3 Gt a–1. The mass budget for the whole Lambert Glacier basin is approximately in balance, and the average basal melt rate in the downstream section of the ice shelf is 5.1 ± 3.0 m a–1. Our results differ substantially from other recent estimates using hydrostatically derived ice thickness data.

Item Details

Item Type:Refereed Article
Keywords:Antarctic glaciology, ice-sheet mass balance
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Jacka, TH (Dr Jo Jacka)
ID Code:94389
Year Published:2014
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2014-09-08
Last Modified:2015-07-13
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