Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future
Abstract Ice‐marginal lakes can affect glacier dynamics but are ignored in studies of the evolution of the Greenland ice sheet (GrIS) and of peripheral mountain glaciers and ice caps (PGICs). Here we show that lakes occupy 10% of the GrIS ice margin and occur on 5% of PGICs. Ice velocity at the GrIS...
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| Format: | Article |
| Language: | English |
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Wiley
2022-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL099276 |
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| author | Jonathan L. Carrivick Penelope How James M. Lea Jenna L. Sutherland Michael Grimes Fiona S. Tweed Stephen Cornford Duncan J. Quincey Joseph Mallalieu |
| author_facet | Jonathan L. Carrivick Penelope How James M. Lea Jenna L. Sutherland Michael Grimes Fiona S. Tweed Stephen Cornford Duncan J. Quincey Joseph Mallalieu |
| author_sort | Jonathan L. Carrivick |
| collection | DOAJ |
| description | Abstract Ice‐marginal lakes can affect glacier dynamics but are ignored in studies of the evolution of the Greenland ice sheet (GrIS) and of peripheral mountain glaciers and ice caps (PGICs). Here we show that lakes occupy 10% of the GrIS ice margin and occur on 5% of PGICs. Ice velocity at the GrIS margin is enhanced by ∼ 25% at lakes versus on land. Mean ice discharge into lakes is ∼4.9 Gt.yr, which is ∼1% of ice discharged through marine termini. We locate thousands of subglacial overdeepenings within which 7,404 km2 of future lakes could form, all of which will be ice‐marginal at some time. Future lakes in the west and east will be restricted to the margin of the GrIS and within alpine valleys, respectively. This status and possible future leads us to contend that lakes should be incorporated into projections of Greenland ice loss. |
| format | Article |
| id | doaj-art-cc226b1532cd4746bb7f6fa9ff39a566 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-cc226b1532cd4746bb7f6fa9ff39a5662025-01-22T14:38:16ZengWileyGeophysical Research Letters0094-82761944-80072022-06-014912n/an/a10.1029/2022GL099276Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible FutureJonathan L. Carrivick0Penelope How1James M. Lea2Jenna L. Sutherland3Michael Grimes4Fiona S. Tweed5Stephen Cornford6Duncan J. Quincey7Joseph Mallalieu8School of Geography and water@leeds University of Leeds Leeds UKDepartment of Glaciology and Climate Geological Survey of Denmark and Greenland Copenhagen DenmarkDepartment of Geography and Planning University of Liverpool England UKSchool of Built Environment Engineering and Computing Leeds Beckett University Leeds UKSchool of Geography and water@leeds University of Leeds Leeds UKGeography Staffordshire University, College Road Stoke‐on‐Trent UKDepartment of Geography Swansea University Swansea UKSchool of Geography and water@leeds University of Leeds Leeds UKSchool of Humanities York St John University York UKAbstract Ice‐marginal lakes can affect glacier dynamics but are ignored in studies of the evolution of the Greenland ice sheet (GrIS) and of peripheral mountain glaciers and ice caps (PGICs). Here we show that lakes occupy 10% of the GrIS ice margin and occur on 5% of PGICs. Ice velocity at the GrIS margin is enhanced by ∼ 25% at lakes versus on land. Mean ice discharge into lakes is ∼4.9 Gt.yr, which is ∼1% of ice discharged through marine termini. We locate thousands of subglacial overdeepenings within which 7,404 km2 of future lakes could form, all of which will be ice‐marginal at some time. Future lakes in the west and east will be restricted to the margin of the GrIS and within alpine valleys, respectively. This status and possible future leads us to contend that lakes should be incorporated into projections of Greenland ice loss.https://doi.org/10.1029/2022GL099276Greenlandice sheetglacierlakemeltwaterproglacial |
| spellingShingle | Jonathan L. Carrivick Penelope How James M. Lea Jenna L. Sutherland Michael Grimes Fiona S. Tweed Stephen Cornford Duncan J. Quincey Joseph Mallalieu Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future Geophysical Research Letters Greenland ice sheet glacier lake meltwater proglacial |
| title | Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future |
| title_full | Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future |
| title_fullStr | Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future |
| title_full_unstemmed | Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future |
| title_short | Ice‐Marginal Proglacial Lakes Across Greenland: Present Status and a Possible Future |
| title_sort | ice marginal proglacial lakes across greenland present status and a possible future |
| topic | Greenland ice sheet glacier lake meltwater proglacial |
| url | https://doi.org/10.1029/2022GL099276 |
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