Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model
<jats:title>Abstract</jats:title><jats:p>We present a newly developed 1-D numerical energy-balance and phase transition supraglacial lake model: GlacierLake. GlacierLake incorporates snowfall, in situ snow and ice melt, incoming water from the surrounding catchment, ice lid formati...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/300845 2024-01-14T10:07:03+01:00 Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model Law, R Arnold, N Benedek, C Tedesco, M Banwell, A Willis, I 2020 application/pdf https://www.repository.cam.ac.uk/handle/1810/300845 https://doi.org/10.17863/CAM.47922 eng eng Cambridge University Press (CUP) http://dx.doi.org/10.1017/jog.2020.7 Journal of Glaciology https://www.repository.cam.ac.uk/handle/1810/300845 doi:10.17863/CAM.47922 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ glacier hydrology melt-surface glacier modelling Article 2020 ftunivcam https://doi.org/10.17863/CAM.47922 2023-12-21T23:28:22Z <jats:title>Abstract</jats:title><jats:p>We present a newly developed 1-D numerical energy-balance and phase transition supraglacial lake model: GlacierLake. GlacierLake incorporates snowfall, in situ snow and ice melt, incoming water from the surrounding catchment, ice lid formation, basal freeze-up and thermal stratification. Snow cover and temperature are varied to test lake development through winter and the maximum lid thickness is recorded. Average wintertime temperatures of −2 to<jats:inline-formula><jats:alternatives><jats:tex-math>$-30^{\circ }{\rm C}$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" xlink:href="S0022143020000076_inline2.png" /></jats:alternatives></jats:inline-formula>and total snowfall of 0 to 3.45 m lead to a range of the maximum lid thickness from 1.2 to 2.8 m after<jats:inline-formula><jats:alternatives><jats:tex-math>${\sim }250$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" xlink:href="S0022143020000076_inline3.png" /></jats:alternatives></jats:inline-formula>days, with snow cover exerting the dominant control. An initial ice temperature of<jats:inline-formula><jats:alternatives><jats:tex-math>$-15^{\circ }{\rm C}$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" xlink:href="S0022143020000076_inline4.png" /></jats:alternatives></jats:inline-formula>with simulated advection of cold ice from upstream results in 0.6 m of basal freeze-up. This suggests that lakes with water depths above 1.3 to 3.4 m (dependent on winter snowfall and temperature) upon lid formation will persist through winter. These buried lakes can provide a sizeable water store at the start of the melt season, expedite future lake formation and warm underlying ice even in ... Article in Journal/Newspaper glacier Greenland Ice Sheet Apollo - University of Cambridge Repository Greenland |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
glacier hydrology melt-surface glacier modelling |
spellingShingle |
glacier hydrology melt-surface glacier modelling Law, R Arnold, N Benedek, C Tedesco, M Banwell, A Willis, I Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model |
topic_facet |
glacier hydrology melt-surface glacier modelling |
description |
<jats:title>Abstract</jats:title><jats:p>We present a newly developed 1-D numerical energy-balance and phase transition supraglacial lake model: GlacierLake. GlacierLake incorporates snowfall, in situ snow and ice melt, incoming water from the surrounding catchment, ice lid formation, basal freeze-up and thermal stratification. Snow cover and temperature are varied to test lake development through winter and the maximum lid thickness is recorded. Average wintertime temperatures of −2 to<jats:inline-formula><jats:alternatives><jats:tex-math>$-30^{\circ }{\rm C}$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" xlink:href="S0022143020000076_inline2.png" /></jats:alternatives></jats:inline-formula>and total snowfall of 0 to 3.45 m lead to a range of the maximum lid thickness from 1.2 to 2.8 m after<jats:inline-formula><jats:alternatives><jats:tex-math>${\sim }250$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" xlink:href="S0022143020000076_inline3.png" /></jats:alternatives></jats:inline-formula>days, with snow cover exerting the dominant control. An initial ice temperature of<jats:inline-formula><jats:alternatives><jats:tex-math>$-15^{\circ }{\rm C}$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" mime-subtype="png" mimetype="image" xlink:href="S0022143020000076_inline4.png" /></jats:alternatives></jats:inline-formula>with simulated advection of cold ice from upstream results in 0.6 m of basal freeze-up. This suggests that lakes with water depths above 1.3 to 3.4 m (dependent on winter snowfall and temperature) upon lid formation will persist through winter. These buried lakes can provide a sizeable water store at the start of the melt season, expedite future lake formation and warm underlying ice even in ... |
format |
Article in Journal/Newspaper |
author |
Law, R Arnold, N Benedek, C Tedesco, M Banwell, A Willis, I |
author_facet |
Law, R Arnold, N Benedek, C Tedesco, M Banwell, A Willis, I |
author_sort |
Law, R |
title |
Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model |
title_short |
Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model |
title_full |
Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model |
title_fullStr |
Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model |
title_full_unstemmed |
Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model |
title_sort |
over-winter persistence of supraglacial lakes on the greenland ice sheet: results and insights from a new model |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
https://www.repository.cam.ac.uk/handle/1810/300845 https://doi.org/10.17863/CAM.47922 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/300845 doi:10.17863/CAM.47922 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.47922 |
_version_ |
1788061455702032384 |