Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet
Surface ablation of the Greenland ice sheet is amplified by surface darkening caused by light-absorbing impurities such as mineral dust, black carbon, and pigmented microbial cells. We present the first quantitative assessment of the microbial contribution to the ice sheet surface darkening, based o...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/428283 2023-11-12T04:17:41+01:00 Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet Stibal, Marek Box, Jason E. Cameron, Karen A. Langen, Peter L. Yallop, Marian L. Mottram, Ruth H. Khan, Alia L. Molotch, Noah P. Chrismas, Nathan A.M. Calì Quaglia, Filippo Remias, Daniel Smeets, C. J.P.Paul van den Broeke, Michiel R. Ryan, Jonathan C. Hubbard, Alun Tranter, Martyn van As, Dirk Ahlstrøm, Andreas P. Sub Dynamics Meteorology Marine and Atmospheric Research 2017-11-28 application/pdf https://dspace.library.uu.nl/handle/1874/428283 en eng 0094-8276 https://dspace.library.uu.nl/handle/1874/428283 info:eu-repo/semantics/OpenAccess albedo algae Greenland ice sheet light-absorbing impurities meltings Geophysics Earth and Planetary Sciences(all) Article 2017 ftunivutrecht 2023-11-01T23:30:24Z Surface ablation of the Greenland ice sheet is amplified by surface darkening caused by light-absorbing impurities such as mineral dust, black carbon, and pigmented microbial cells. We present the first quantitative assessment of the microbial contribution to the ice sheet surface darkening, based on field measurements of surface reflectance and concentrations of light-absorbing impurities, including pigmented algae, during the 2014 melt season in the southwestern part of the ice sheet. The impact of algae on bare ice darkening in the study area was greater than that of nonalgal impurities and yielded a net albedo reduction of 0.038 ± 0.0035 for each algal population doubling. We argue that algal growth is a crucial control of bare ice darkening, and incorporating the algal darkening effect will improve mass balance and sea level projections of the Greenland ice sheet and ice masses elsewhere. Article in Journal/Newspaper Greenland Ice Sheet Utrecht University Repository Greenland |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
albedo algae Greenland ice sheet light-absorbing impurities meltings Geophysics Earth and Planetary Sciences(all) |
spellingShingle |
albedo algae Greenland ice sheet light-absorbing impurities meltings Geophysics Earth and Planetary Sciences(all) Stibal, Marek Box, Jason E. Cameron, Karen A. Langen, Peter L. Yallop, Marian L. Mottram, Ruth H. Khan, Alia L. Molotch, Noah P. Chrismas, Nathan A.M. Calì Quaglia, Filippo Remias, Daniel Smeets, C. J.P.Paul van den Broeke, Michiel R. Ryan, Jonathan C. Hubbard, Alun Tranter, Martyn van As, Dirk Ahlstrøm, Andreas P. Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet |
topic_facet |
albedo algae Greenland ice sheet light-absorbing impurities meltings Geophysics Earth and Planetary Sciences(all) |
description |
Surface ablation of the Greenland ice sheet is amplified by surface darkening caused by light-absorbing impurities such as mineral dust, black carbon, and pigmented microbial cells. We present the first quantitative assessment of the microbial contribution to the ice sheet surface darkening, based on field measurements of surface reflectance and concentrations of light-absorbing impurities, including pigmented algae, during the 2014 melt season in the southwestern part of the ice sheet. The impact of algae on bare ice darkening in the study area was greater than that of nonalgal impurities and yielded a net albedo reduction of 0.038 ± 0.0035 for each algal population doubling. We argue that algal growth is a crucial control of bare ice darkening, and incorporating the algal darkening effect will improve mass balance and sea level projections of the Greenland ice sheet and ice masses elsewhere. |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Stibal, Marek Box, Jason E. Cameron, Karen A. Langen, Peter L. Yallop, Marian L. Mottram, Ruth H. Khan, Alia L. Molotch, Noah P. Chrismas, Nathan A.M. Calì Quaglia, Filippo Remias, Daniel Smeets, C. J.P.Paul van den Broeke, Michiel R. Ryan, Jonathan C. Hubbard, Alun Tranter, Martyn van As, Dirk Ahlstrøm, Andreas P. |
author_facet |
Stibal, Marek Box, Jason E. Cameron, Karen A. Langen, Peter L. Yallop, Marian L. Mottram, Ruth H. Khan, Alia L. Molotch, Noah P. Chrismas, Nathan A.M. Calì Quaglia, Filippo Remias, Daniel Smeets, C. J.P.Paul van den Broeke, Michiel R. Ryan, Jonathan C. Hubbard, Alun Tranter, Martyn van As, Dirk Ahlstrøm, Andreas P. |
author_sort |
Stibal, Marek |
title |
Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet |
title_short |
Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet |
title_full |
Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet |
title_fullStr |
Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet |
title_full_unstemmed |
Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet |
title_sort |
algae drive enhanced darkening of bare ice on the greenland ice sheet |
publishDate |
2017 |
url |
https://dspace.library.uu.nl/handle/1874/428283 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
0094-8276 https://dspace.library.uu.nl/handle/1874/428283 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334484149960704 |