Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure
Source at https://doi.org/10.1126/sciadv.aav3738 . Greenland Ice Sheet mass loss has recently increased because of enhanced surface melt and runoff. Since melt is critically modulated by surface albedo, understanding the processes and feedbacks that alter albedo is a prerequisite for accurately fore...
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American Association for the Advancement of Science(AAAS)
2019
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Online Access: | https://hdl.handle.net/10037/15125 https://doi.org/10.1126/sciadv.aav3738 |
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ftunivtroemsoe:oai:munin.uit.no:10037/15125 2023-05-15T16:27:59+02:00 Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure Ryan, J.C. Smith, L.C. Van As, D. Cooley, S.W. Cooper, M.G. Pitcher, L.H. Hubbard, A. 2019-03-06 https://hdl.handle.net/10037/15125 https://doi.org/10.1126/sciadv.aav3738 eng eng American Association for the Advancement of Science(AAAS) Science Advances Ryan, J. C., Smith, L. C., van As, D., Cooley, S. W., Cooper, M. G., Pitcher, L. H. & Hubbard, A. (2019). Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure. Science Advances, 5(3), eaav3738. https://doi.org/10.1126/sciadv.aav3738. FRIDAID 1685449 doi:10.1126/sciadv.aav3738 2375-2548 https://hdl.handle.net/10037/15125 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 Climate change Earth science Hydrology Water resources Journal article Tidsskriftartikkel Peer reviewed 2019 ftunivtroemsoe https://doi.org/10.1126/sciadv.aav3738 2021-06-25T17:56:30Z Source at https://doi.org/10.1126/sciadv.aav3738 . Greenland Ice Sheet mass loss has recently increased because of enhanced surface melt and runoff. Since melt is critically modulated by surface albedo, understanding the processes and feedbacks that alter albedo is a prerequisite for accurately forecasting mass loss. Using satellite imagery, we demonstrate the importance of Greenland’s seasonally fluctuating snowline, which reduces ice sheet albedo and enhances melt by exposing dark bare ice. From 2001 to 2017, this process drove 53% of net shortwave radiation variability in the ablation zone and amplified ice sheet melt five times more than hydrological and biological processes that darken bare ice itself. In a warmer climate, snowline fluctuations will exert an even greater control on melt due to flatter ice sheet topography at higher elevations. Current climate models, however, inaccurately predict snowline elevations during high melt years, portending an unforeseen uncertainty in forecasts of Greenland’s runoff contribution to global sea level rise Article in Journal/Newspaper Greenland Ice Sheet University of Tromsø: Munin Open Research Archive Greenland Science Advances 5 3 eaav3738 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 Climate change Earth science Hydrology Water resources |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 Climate change Earth science Hydrology Water resources Ryan, J.C. Smith, L.C. Van As, D. Cooley, S.W. Cooper, M.G. Pitcher, L.H. Hubbard, A. Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Quaternary geology glaciology: 465 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Kvartærgeologi glasiologi: 465 VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Oseanografi: 452 Climate change Earth science Hydrology Water resources |
description |
Source at https://doi.org/10.1126/sciadv.aav3738 . Greenland Ice Sheet mass loss has recently increased because of enhanced surface melt and runoff. Since melt is critically modulated by surface albedo, understanding the processes and feedbacks that alter albedo is a prerequisite for accurately forecasting mass loss. Using satellite imagery, we demonstrate the importance of Greenland’s seasonally fluctuating snowline, which reduces ice sheet albedo and enhances melt by exposing dark bare ice. From 2001 to 2017, this process drove 53% of net shortwave radiation variability in the ablation zone and amplified ice sheet melt five times more than hydrological and biological processes that darken bare ice itself. In a warmer climate, snowline fluctuations will exert an even greater control on melt due to flatter ice sheet topography at higher elevations. Current climate models, however, inaccurately predict snowline elevations during high melt years, portending an unforeseen uncertainty in forecasts of Greenland’s runoff contribution to global sea level rise |
format |
Article in Journal/Newspaper |
author |
Ryan, J.C. Smith, L.C. Van As, D. Cooley, S.W. Cooper, M.G. Pitcher, L.H. Hubbard, A. |
author_facet |
Ryan, J.C. Smith, L.C. Van As, D. Cooley, S.W. Cooper, M.G. Pitcher, L.H. Hubbard, A. |
author_sort |
Ryan, J.C. |
title |
Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure |
title_short |
Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure |
title_full |
Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure |
title_fullStr |
Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure |
title_full_unstemmed |
Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure |
title_sort |
greenland ice sheet surface melt amplified by snowline migration and bare ice exposure |
publisher |
American Association for the Advancement of Science(AAAS) |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/15125 https://doi.org/10.1126/sciadv.aav3738 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
Science Advances Ryan, J. C., Smith, L. C., van As, D., Cooley, S. W., Cooper, M. G., Pitcher, L. H. & Hubbard, A. (2019). Greenland Ice Sheet surface melt amplified by snowline migration and bare ice exposure. Science Advances, 5(3), eaav3738. https://doi.org/10.1126/sciadv.aav3738. FRIDAID 1685449 doi:10.1126/sciadv.aav3738 2375-2548 https://hdl.handle.net/10037/15125 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1126/sciadv.aav3738 |
container_title |
Science Advances |
container_volume |
5 |
container_issue |
3 |
container_start_page |
eaav3738 |
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1766017598437195776 |