Constraints on subglacial melt fluxes from observations of active subglacial lake recharge
Active subglacial lakes provide a rare glimpse of the subglacial environment and hydrological processes at play. Several studies contributed to establishing active subglacial lake inventories and document lake drainage and connection, but few focused on the period between lake drainage when the melt...
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ftdoajarticles:oai:doaj.org/article:5649914572ce4010b733a447734a37f1 2023-10-29T02:32:26+01:00 Constraints on subglacial melt fluxes from observations of active subglacial lake recharge George Malczyk Noel Gourmelen Mauro Werder Martin Wearing Dan Goldberg https://doi.org/10.1017/jog.2023.70 https://doaj.org/article/5649914572ce4010b733a447734a37f1 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143023000709/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.70 0022-1430 1727-5652 https://doaj.org/article/5649914572ce4010b733a447734a37f1 Journal of Glaciology, Pp 1-15 glacier hydrology melt – basal remote sensing subglacial lakes subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/jog.2023.70 2023-10-01T00:40:48Z Active subglacial lakes provide a rare glimpse of the subglacial environment and hydrological processes at play. Several studies contributed to establishing active subglacial lake inventories and document lake drainage and connection, but few focused on the period between lake drainage when the melt production and transport contribute to the refilling of these lakes. In this study, we employ high-resolution CryoSat-2 altimetry data from 2010 to 2021 to compile an inventory of recharging lakes across Antarctica. We extract recharge rates from these lakes, which serve as a lower limit on subglacial melt production. These recharge rates are compared against predictions obtained by routing modelled subglacial meltwater at the ice-sheet's base. Our findings indicate that modelled recharge rates are consistent with observations in all but one of the investigated lakes, providing a lower bound on geothermal heat fluxes. Lake Cook E2 displays recharge rates far exceeding predictions, indicating that processes are taking place that are currently unaccounted for. Considering recharge in hydrologically connected lake networks instead of individually provides a stricter constraint on melt production. Recharge rates extracted from the Thwaites Lake system suggest that subglacial melt production has been underestimated. Article in Journal/Newspaper Antarc* Antarctica Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Journal of Glaciology 1 15 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacier hydrology melt – basal remote sensing subglacial lakes subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacier hydrology melt – basal remote sensing subglacial lakes subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 George Malczyk Noel Gourmelen Mauro Werder Martin Wearing Dan Goldberg Constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
topic_facet |
glacier hydrology melt – basal remote sensing subglacial lakes subglacial processes Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Active subglacial lakes provide a rare glimpse of the subglacial environment and hydrological processes at play. Several studies contributed to establishing active subglacial lake inventories and document lake drainage and connection, but few focused on the period between lake drainage when the melt production and transport contribute to the refilling of these lakes. In this study, we employ high-resolution CryoSat-2 altimetry data from 2010 to 2021 to compile an inventory of recharging lakes across Antarctica. We extract recharge rates from these lakes, which serve as a lower limit on subglacial melt production. These recharge rates are compared against predictions obtained by routing modelled subglacial meltwater at the ice-sheet's base. Our findings indicate that modelled recharge rates are consistent with observations in all but one of the investigated lakes, providing a lower bound on geothermal heat fluxes. Lake Cook E2 displays recharge rates far exceeding predictions, indicating that processes are taking place that are currently unaccounted for. Considering recharge in hydrologically connected lake networks instead of individually provides a stricter constraint on melt production. Recharge rates extracted from the Thwaites Lake system suggest that subglacial melt production has been underestimated. |
format |
Article in Journal/Newspaper |
author |
George Malczyk Noel Gourmelen Mauro Werder Martin Wearing Dan Goldberg |
author_facet |
George Malczyk Noel Gourmelen Mauro Werder Martin Wearing Dan Goldberg |
author_sort |
George Malczyk |
title |
Constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
title_short |
Constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
title_full |
Constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
title_fullStr |
Constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
title_full_unstemmed |
Constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
title_sort |
constraints on subglacial melt fluxes from observations of active subglacial lake recharge |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/jog.2023.70 https://doaj.org/article/5649914572ce4010b733a447734a37f1 |
genre |
Antarc* Antarctica Journal of Glaciology |
genre_facet |
Antarc* Antarctica Journal of Glaciology |
op_source |
Journal of Glaciology, Pp 1-15 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143023000709/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2023.70 0022-1430 1727-5652 https://doaj.org/article/5649914572ce4010b733a447734a37f1 |
op_doi |
https://doi.org/10.1017/jog.2023.70 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
15 |
_version_ |
1781053836551520256 |