Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: results and insights from a new model
Abstract 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. Sn...
Published in: | Journal of Glaciology |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/jog.2020.7 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143020000076 |
id |
crcambridgeupr:10.1017/jog.2020.7 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/jog.2020.7 2024-06-23T07:53:21+00:00 Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: results and insights from a new model Law, Robert Arnold, Neil Benedek, Corinne Tedesco, Marco Banwell, Alison Willis, Ian 2020 http://dx.doi.org/10.1017/jog.2020.7 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143020000076 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology volume 66, issue 257, page 362-372 ISSN 0022-1430 1727-5652 journal-article 2020 crcambridgeupr https://doi.org/10.1017/jog.2020.7 2024-06-12T04:04:33Z Abstract 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 $-30^{\circ }{\rm C}$ 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 ${\sim }250$ days, with snow cover exerting the dominant control. An initial ice temperature of $-15^{\circ }{\rm C}$ 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 winter. Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology Cambridge University Press Greenland Journal of Glaciology 66 257 362 372 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract 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 $-30^{\circ }{\rm C}$ 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 ${\sim }250$ days, with snow cover exerting the dominant control. An initial ice temperature of $-15^{\circ }{\rm C}$ 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 winter. |
format |
Article in Journal/Newspaper |
author |
Law, Robert Arnold, Neil Benedek, Corinne Tedesco, Marco Banwell, Alison Willis, Ian |
spellingShingle |
Law, Robert Arnold, Neil Benedek, Corinne Tedesco, Marco Banwell, Alison Willis, Ian Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: results and insights from a new model |
author_facet |
Law, Robert Arnold, Neil Benedek, Corinne Tedesco, Marco Banwell, Alison Willis, Ian |
author_sort |
Law, Robert |
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 |
http://dx.doi.org/10.1017/jog.2020.7 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143020000076 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 66, issue 257, page 362-372 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2020.7 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
257 |
container_start_page |
362 |
op_container_end_page |
372 |
_version_ |
1802644946738479104 |