Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet
A survey of supra-glacial lakes on the western margin of the Greenland Ice Sheet reveals a seasonally-driven hydrological system, culminating in widespread lake drainage in late summer. We used satellite imagery to study the evolution of 292 lakes across two sites totalling 22 000 km2 in area. Durin...
Published in: | Earth and Planetary Science Letters |
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ftulancaster:oai:eprints.lancs.ac.uk:128849 2023-08-27T04:09:44+02:00 Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet McMillan, Malcolm Nienow, Peter Shepherd, Andrew Benham, Toby Sole, Andrew 2007-10-30 https://eprints.lancs.ac.uk/id/eprint/128849/ https://doi.org/10.1016/j.epsl.2007.08.002 unknown McMillan, Malcolm and Nienow, Peter and Shepherd, Andrew and Benham, Toby and Sole, Andrew (2007) Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet. Earth and Planetary Science Letters, 262 (3-4). pp. 484-492. ISSN 0012-821X Journal Article PeerReviewed 2007 ftulancaster https://doi.org/10.1016/j.epsl.2007.08.002 2023-08-03T22:34:21Z A survey of supra-glacial lakes on the western margin of the Greenland Ice Sheet reveals a seasonally-driven hydrological system, culminating in widespread lake drainage in late summer. We used satellite imagery to study the evolution of 292 lakes across two sites totalling 22 000 km2 in area. During 2001, the lakes combined area increased to 75 ± 5 km2 by the beginning of July. Over the following 25 days, an area totalling 36 ± 3.5 km2 drained from 216 lakes. At one study site, we used meteorological data and a positive degree day model to calculate the volume of water generated by melting in the lake catchments. Based on this estimate, the mean depth of filling lakes surveyed rose from 1.5 ± 0.7 m on 7th July to 3.9 ± 1.1 m on 1st August, in agreement with a value for one lake of 4.4 ± 0.9 m we have derived from airborne altimetry. During this 25 day period, we estimate that 38 ± 18 × 107 m3 of water drained from the surface at this site, and that there was an average water flux of 1.3 ± 0.3 m3 s- 1 passing through each lake that drained completely. Article in Journal/Newspaper Greenland Ice Sheet Lancaster University: Lancaster Eprints Greenland Earth and Planetary Science Letters 262 3-4 484 492 |
institution |
Open Polar |
collection |
Lancaster University: Lancaster Eprints |
op_collection_id |
ftulancaster |
language |
unknown |
description |
A survey of supra-glacial lakes on the western margin of the Greenland Ice Sheet reveals a seasonally-driven hydrological system, culminating in widespread lake drainage in late summer. We used satellite imagery to study the evolution of 292 lakes across two sites totalling 22 000 km2 in area. During 2001, the lakes combined area increased to 75 ± 5 km2 by the beginning of July. Over the following 25 days, an area totalling 36 ± 3.5 km2 drained from 216 lakes. At one study site, we used meteorological data and a positive degree day model to calculate the volume of water generated by melting in the lake catchments. Based on this estimate, the mean depth of filling lakes surveyed rose from 1.5 ± 0.7 m on 7th July to 3.9 ± 1.1 m on 1st August, in agreement with a value for one lake of 4.4 ± 0.9 m we have derived from airborne altimetry. During this 25 day period, we estimate that 38 ± 18 × 107 m3 of water drained from the surface at this site, and that there was an average water flux of 1.3 ± 0.3 m3 s- 1 passing through each lake that drained completely. |
format |
Article in Journal/Newspaper |
author |
McMillan, Malcolm Nienow, Peter Shepherd, Andrew Benham, Toby Sole, Andrew |
spellingShingle |
McMillan, Malcolm Nienow, Peter Shepherd, Andrew Benham, Toby Sole, Andrew Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet |
author_facet |
McMillan, Malcolm Nienow, Peter Shepherd, Andrew Benham, Toby Sole, Andrew |
author_sort |
McMillan, Malcolm |
title |
Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet |
title_short |
Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet |
title_full |
Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet |
title_fullStr |
Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet |
title_full_unstemmed |
Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet |
title_sort |
seasonal evolution of supra-glacial lakes on the greenland ice sheet |
publishDate |
2007 |
url |
https://eprints.lancs.ac.uk/id/eprint/128849/ https://doi.org/10.1016/j.epsl.2007.08.002 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
McMillan, Malcolm and Nienow, Peter and Shepherd, Andrew and Benham, Toby and Sole, Andrew (2007) Seasonal evolution of supra-glacial lakes on the Greenland Ice Sheet. Earth and Planetary Science Letters, 262 (3-4). pp. 484-492. ISSN 0012-821X |
op_doi |
https://doi.org/10.1016/j.epsl.2007.08.002 |
container_title |
Earth and Planetary Science Letters |
container_volume |
262 |
container_issue |
3-4 |
container_start_page |
484 |
op_container_end_page |
492 |
_version_ |
1775351303801667584 |