Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet
Antarctica Bedmap2 datasets are used to calculate subglacial hydraulic potential and the area, depth and volume of hydraulic potential sinks. There are over 32 000 contiguous sinks, which can be thought of as predicted lakes. Patterns of subglacial melt are modelled with a balanced ice flux flow mod...
Published in: | Annals of Glaciology |
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ftnerc:oai:nora.nerc.ac.uk:516199 2023-05-15T13:29:47+02:00 Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet Willis, Ian C. Pope, Ed L. Leysinger Vieli, Gwendolyn J.-M.C. Arnold, Neil S. Long, Sylvan 2016-07 text http://nora.nerc.ac.uk/id/eprint/516199/ https://nora.nerc.ac.uk/id/eprint/516199/1/div-class-title-drainage-networks-lakes-and-water-fluxes-beneath-the-antarctic-ice-sheet-div.pdf https://doi.org/10.1017/aog.2016.15 en eng https://nora.nerc.ac.uk/id/eprint/516199/1/div-class-title-drainage-networks-lakes-and-water-fluxes-beneath-the-antarctic-ice-sheet-div.pdf Willis, Ian C.; Pope, Ed L.; Leysinger Vieli, Gwendolyn J.-M.C.; Arnold, Neil S.; Long, Sylvan. 2016 Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet. Annals of Glaciology, 57 (72). 96-108. https://doi.org/10.1017/aog.2016.15 <https://doi.org/10.1017/aog.2016.15> cc_by_4 CC-BY Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1017/aog.2016.15 2023-02-04T19:44:28Z Antarctica Bedmap2 datasets are used to calculate subglacial hydraulic potential and the area, depth and volume of hydraulic potential sinks. There are over 32 000 contiguous sinks, which can be thought of as predicted lakes. Patterns of subglacial melt are modelled with a balanced ice flux flow model, and water fluxes are cumulated along predicted flow pathways to quantify steady-state fluxes from the main basin outlets and from known subglacial lakes. The total flux from the continent is ~21 km3 a−1. Byrd Glacier has the greatest basin flux of ~2.7 km3 a−1. Fluxes from subglacial lakes range from ~1 × 10−4 to ~1.5 km3 a−1. Lake turnover times are calculated from their volumes and fluxes, and have median values of ~100 a for known ‘active’ lakes and ~500 a for other lakes. Recurrence intervals of a 0.25 km3 flood range from ~2 months to ~2000 a (median ≈130 a) for known ‘active’ lakes and from ~2 to ~2400 a (median ≈ 360 a) for other lakes. Thus, several lakes that have recently been observed to fill and drain may not do so again for many centuries; and several lakes that have not, so far, been observed to fill and drain have the potential to do so, even at annual to decadal timescales. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica Byrd Glacier Ice Sheet Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Byrd Byrd Glacier ENVELOPE(160.333,160.333,-80.250,-80.250) Flood Range ENVELOPE(-134.000,-134.000,-76.000,-76.000) Annals of Glaciology 57 72 96 108 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Antarctica Bedmap2 datasets are used to calculate subglacial hydraulic potential and the area, depth and volume of hydraulic potential sinks. There are over 32 000 contiguous sinks, which can be thought of as predicted lakes. Patterns of subglacial melt are modelled with a balanced ice flux flow model, and water fluxes are cumulated along predicted flow pathways to quantify steady-state fluxes from the main basin outlets and from known subglacial lakes. The total flux from the continent is ~21 km3 a−1. Byrd Glacier has the greatest basin flux of ~2.7 km3 a−1. Fluxes from subglacial lakes range from ~1 × 10−4 to ~1.5 km3 a−1. Lake turnover times are calculated from their volumes and fluxes, and have median values of ~100 a for known ‘active’ lakes and ~500 a for other lakes. Recurrence intervals of a 0.25 km3 flood range from ~2 months to ~2000 a (median ≈130 a) for known ‘active’ lakes and from ~2 to ~2400 a (median ≈ 360 a) for other lakes. Thus, several lakes that have recently been observed to fill and drain may not do so again for many centuries; and several lakes that have not, so far, been observed to fill and drain have the potential to do so, even at annual to decadal timescales. |
format |
Article in Journal/Newspaper |
author |
Willis, Ian C. Pope, Ed L. Leysinger Vieli, Gwendolyn J.-M.C. Arnold, Neil S. Long, Sylvan |
spellingShingle |
Willis, Ian C. Pope, Ed L. Leysinger Vieli, Gwendolyn J.-M.C. Arnold, Neil S. Long, Sylvan Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet |
author_facet |
Willis, Ian C. Pope, Ed L. Leysinger Vieli, Gwendolyn J.-M.C. Arnold, Neil S. Long, Sylvan |
author_sort |
Willis, Ian C. |
title |
Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet |
title_short |
Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet |
title_full |
Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet |
title_fullStr |
Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet |
title_full_unstemmed |
Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet |
title_sort |
drainage networks, lakes and water fluxes beneath the antarctic ice sheet |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/516199/ https://nora.nerc.ac.uk/id/eprint/516199/1/div-class-title-drainage-networks-lakes-and-water-fluxes-beneath-the-antarctic-ice-sheet-div.pdf https://doi.org/10.1017/aog.2016.15 |
long_lat |
ENVELOPE(160.333,160.333,-80.250,-80.250) ENVELOPE(-134.000,-134.000,-76.000,-76.000) |
geographic |
Antarctic The Antarctic Byrd Byrd Glacier Flood Range |
geographic_facet |
Antarctic The Antarctic Byrd Byrd Glacier Flood Range |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica Byrd Glacier Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica Byrd Glacier Ice Sheet |
op_relation |
https://nora.nerc.ac.uk/id/eprint/516199/1/div-class-title-drainage-networks-lakes-and-water-fluxes-beneath-the-antarctic-ice-sheet-div.pdf Willis, Ian C.; Pope, Ed L.; Leysinger Vieli, Gwendolyn J.-M.C.; Arnold, Neil S.; Long, Sylvan. 2016 Drainage networks, lakes and water fluxes beneath the Antarctic ice sheet. Annals of Glaciology, 57 (72). 96-108. https://doi.org/10.1017/aog.2016.15 <https://doi.org/10.1017/aog.2016.15> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1017/aog.2016.15 |
container_title |
Annals of Glaciology |
container_volume |
57 |
container_issue |
72 |
container_start_page |
96 |
op_container_end_page |
108 |
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1766003014541246464 |