Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica

Anja Diez*, Kenichi Matsuoka, Tom A. Jordan, Jack Kohler, Fausto Ferraccioli, Hugh F. Corr, Arne V. Olesen, René Forsberg, Tania G. Casal

*Corresponding author for this work

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Abstract

The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B, C, and D) located at the onset of the fast ice flow (≥15 m/yr) and multiple smaller lakes along the glacier. The presence of subglacial water potentially plays a key role in the control of fast ice flow of Recovery Glacier. We present new insights on the Recovery Lakes from airborne radar data collected in 2013 and 2015. Using an adjusted classification scheme, we show that a single large area consisting of smaller lakes connected by likely saturated sediment, referred to as Lake AB, exists in the originally proposed area of the Recovery Lakes A and B. We estimate that the current size of Lake AB is ∼4,320 km2. Water likely leaks from the western shore of Lake AB lubricating the bed initiating fast ice flow at this location. The difference in the outlines of Lake AB and the Lakes A and B previously derived from surface features suggested that a larger paleolake existed here in the past. From our data, we find Recovery Lake C to be dry; we attribute fast ice flow originating from this area to be due to a topographic step and thus an increase in ice thickness rather than enhanced lubrication at the bed.

Original languageEnglish
JournalJournal of Geophysical Research: Earth Surface
Volume124
Issue number2
Pages (from-to)287-304
ISSN2169-9003
DOIs
Publication statusPublished - 2019

Bibliographical note

©2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

Cite this

Diez, A., Matsuoka, K., Jordan, T. A., Kohler, J., Ferraccioli, F., Corr, H. F., ... Casal, T. G. (2019). Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica. Journal of Geophysical Research: Earth Surface, 124(2), 287-304. https://doi.org/10.1029/2018JF004799
Diez, Anja ; Matsuoka, Kenichi ; Jordan, Tom A. ; Kohler, Jack ; Ferraccioli, Fausto ; Corr, Hugh F. ; Olesen, Arne V. ; Forsberg, René ; Casal, Tania G. / Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica. In: Journal of Geophysical Research: Earth Surface. 2019 ; Vol. 124, No. 2. pp. 287-304.
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title = "Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica",
abstract = "The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B, C, and D) located at the onset of the fast ice flow (≥15 m/yr) and multiple smaller lakes along the glacier. The presence of subglacial water potentially plays a key role in the control of fast ice flow of Recovery Glacier. We present new insights on the Recovery Lakes from airborne radar data collected in 2013 and 2015. Using an adjusted classification scheme, we show that a single large area consisting of smaller lakes connected by likely saturated sediment, referred to as Lake AB, exists in the originally proposed area of the Recovery Lakes A and B. We estimate that the current size of Lake AB is ∼4,320 km2. Water likely leaks from the western shore of Lake AB lubricating the bed initiating fast ice flow at this location. The difference in the outlines of Lake AB and the Lakes A and B previously derived from surface features suggested that a larger paleolake existed here in the past. From our data, we find Recovery Lake C to be dry; we attribute fast ice flow originating from this area to be due to a topographic step and thus an increase in ice thickness rather than enhanced lubrication at the bed.",
author = "Anja Diez and Kenichi Matsuoka and Jordan, {Tom A.} and Jack Kohler and Fausto Ferraccioli and Corr, {Hugh F.} and Olesen, {Arne V.} and Ren{\'e} Forsberg and Casal, {Tania G.}",
note = "{\circledC}2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.",
year = "2019",
doi = "10.1029/2018JF004799",
language = "English",
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pages = "287--304",
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Diez, A, Matsuoka, K, Jordan, TA, Kohler, J, Ferraccioli, F, Corr, HF, Olesen, AV, Forsberg, R & Casal, TG 2019, 'Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica', Journal of Geophysical Research: Earth Surface, vol. 124, no. 2, pp. 287-304. https://doi.org/10.1029/2018JF004799

Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica. / Diez, Anja; Matsuoka, Kenichi; Jordan, Tom A.; Kohler, Jack; Ferraccioli, Fausto; Corr, Hugh F.; Olesen, Arne V.; Forsberg, René; Casal, Tania G.

In: Journal of Geophysical Research: Earth Surface, Vol. 124, No. 2, 2019, p. 287-304.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Patchy Lakes and Topographic Origin for Fast Flow in the Recovery Glacier System, East Antarctica

AU - Diez, Anja

AU - Matsuoka, Kenichi

AU - Jordan, Tom A.

AU - Kohler, Jack

AU - Ferraccioli, Fausto

AU - Corr, Hugh F.

AU - Olesen, Arne V.

AU - Forsberg, René

AU - Casal, Tania G.

N1 - ©2019. The Authors. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

PY - 2019

Y1 - 2019

N2 - The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B, C, and D) located at the onset of the fast ice flow (≥15 m/yr) and multiple smaller lakes along the glacier. The presence of subglacial water potentially plays a key role in the control of fast ice flow of Recovery Glacier. We present new insights on the Recovery Lakes from airborne radar data collected in 2013 and 2015. Using an adjusted classification scheme, we show that a single large area consisting of smaller lakes connected by likely saturated sediment, referred to as Lake AB, exists in the originally proposed area of the Recovery Lakes A and B. We estimate that the current size of Lake AB is ∼4,320 km2. Water likely leaks from the western shore of Lake AB lubricating the bed initiating fast ice flow at this location. The difference in the outlines of Lake AB and the Lakes A and B previously derived from surface features suggested that a larger paleolake existed here in the past. From our data, we find Recovery Lake C to be dry; we attribute fast ice flow originating from this area to be due to a topographic step and thus an increase in ice thickness rather than enhanced lubrication at the bed.

AB - The Recovery subglacial basin, with its largest glacier Recovery Glacier, has been identified as potentially the biggest contributor to future sea level rise from East Antarctica. Subglacial lakes along the main trunk have been detected from satellite data, with four giant lakes (Recovery Lakes A, B, C, and D) located at the onset of the fast ice flow (≥15 m/yr) and multiple smaller lakes along the glacier. The presence of subglacial water potentially plays a key role in the control of fast ice flow of Recovery Glacier. We present new insights on the Recovery Lakes from airborne radar data collected in 2013 and 2015. Using an adjusted classification scheme, we show that a single large area consisting of smaller lakes connected by likely saturated sediment, referred to as Lake AB, exists in the originally proposed area of the Recovery Lakes A and B. We estimate that the current size of Lake AB is ∼4,320 km2. Water likely leaks from the western shore of Lake AB lubricating the bed initiating fast ice flow at this location. The difference in the outlines of Lake AB and the Lakes A and B previously derived from surface features suggested that a larger paleolake existed here in the past. From our data, we find Recovery Lake C to be dry; we attribute fast ice flow originating from this area to be due to a topographic step and thus an increase in ice thickness rather than enhanced lubrication at the bed.

U2 - 10.1029/2018JF004799

DO - 10.1029/2018JF004799

M3 - Journal article

AN - SCOPUS:85060924983

VL - 124

SP - 287

EP - 304

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 2

ER -