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Organization of ice flow by localized regions of elevated geothermal heat flux

Citation

Pittard, ML and Galton-Fenzi, BK and Roberts, JL and Watson, CS, Organization of ice flow by localized regions of elevated geothermal heat flux, Geophysical Research Letters, 43, (7) pp. 3342-3350. ISSN 0094-8276 (2016) [Refereed Article]


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Copyright Statement

2016. American Geophysical Union.

DOI: doi:10.1002/2016GL068436

Abstract

The impact of localized regions of elevated geothermal heat flux on ice sheet dynamics is largely unknown. Simulations of ice dynamics are produced using poorly resolved and low-resolution estimates of geothermal heat flux. Observations of crustal heat production within the continental crust underneath the Lambert-Amery glacial system in East Antarctica indicate that high heat flux regions of at least 120mWm−2 exist. Here we investigate the influence of simulated but plausible, localized regions of elevated geothermal heat flux on ice dynamics using a numerical ice sheet model of the Lambert-Amery glacial system. We find that high heat flux regions have a significant effect across areas of slow-moving ice with the influence extending both upstream and downstream of the geothermal anomaly, while fast-moving ice is relatively unaffected. Our results suggest that localized regions of elevated geothermal heat flux may play an important role in the organization of ice sheet flow.

Item Details

Item Type:Refereed Article
Keywords:ice flow, geothermal heat flux, regional ice sheet model
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)
Author:Pittard, ML (Mr Mark Pittard)
Author:Galton-Fenzi, BK (Dr Ben Galton-Fenzi)
Author:Roberts, JL (Dr Jason Roberts)
Author:Watson, CS (Dr Christopher Watson)
ID Code:114790
Year Published:2016
Web of Science® Times Cited:4
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2017-02-27
Last Modified:2017-10-30
Downloads:22 View Download Statistics

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