Mass Balance Assessment of the Amery Ice Shelf Basin, East Antarctica

Abstract The Lambert Glacier‐Amery Ice Shelf (AIS) System is the largest glacial system in East Antarctica. Accurate estimation of its mass balance is imperative for reducing the uncertainty in evaluating the sea‐level contribution from the East Antarctic Ice Sheet. Here, we present a comprehensive...

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Bibliographic Details
Published in:Earth and Space Science
Main Authors: Chunxia Zhou, Qi Liang, Yiming Chen, Haobo Lei, Zheng Fu, Lei Zheng, Ruixi Liu
Format: Article in Journal/Newspaper
Language:English
Published: American Geophysical Union (AGU) 2019
Subjects:
Astronomy
QB1-991
Geology
QE1-996.5
Antarctic
East Antarctica
East Antarctic Ice Sheet
Amery
Amery Ice Shelf
Lambert Glacier
Antarc*
Antarctica
Ice Sheet
Ice Shelf
Online Access:https://doi.org/10.1029/2019EA000596
https://doaj.org/article/d0ab82ba7b2c46c093c85a999468e0ce
Description
Summary:Abstract The Lambert Glacier‐Amery Ice Shelf (AIS) System is the largest glacial system in East Antarctica. Accurate estimation of its mass balance is imperative for reducing the uncertainty in evaluating the sea‐level contribution from the East Antarctic Ice Sheet. Here, we present a comprehensive investigation of the mass balance of the AIS basin. We measured the ice velocity with Sentinel‐1 synthetic‐aperture radar data acquired in 2016. The ice thickness data from the radio echo‐sounding measurements were combined with the surface mass balance data from the new Regional Atmospheric Climate Model, from which the mass balance of the AIS basin was estimated. Our estimates suggest a slight positive mass balance of 3.1 ± 9.4 Gt/year in 2016. We found that the short‐term fluctuations in the surface mass balance dramatically affect the AIS mass balance. A comparison with previous estimates confirms the long‐term positive mass balance trend.

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