Dark ice in a warming world: advances and challenges in the study of Greenland Ice Sheet's biological darkening

Laura Halbach; Lou Anne Chevrollier; Joseph M. Cook; Ian T. Stevens; Martin Hansen; Alexandre M. Anesio; Liane G. Benning; Martyn Tranter

doi:10.1017/aog.2023.17

Dark ice in a warming world: advances and challenges in the study of Greenland Ice Sheet's biological darkening

Laura Halbach^*, Lou Anne Chevrollier^*, Joseph M. Cook, Ian T. Stevens, Martin Hansen, Alexandre M. Anesio, Liane G. Benning, Martyn Tranter

^*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

7 Citationer (Scopus)

Abstract

The surface of the Greenland Ice Sheet is darkening, which accelerates its surface melt. The role of glacier ice algae in reducing surface albedo is widely recognised but not well quantified and the feedbacks between the algae and the weathering crust remain poorly understood. In this letter, we summarise recent advances in the study of the biological darkening of the Greenland Ice Sheet and highlight three key research priorities that are required to better understand and forecast algal-driven melt: (i) identifying the controls on glacier ice algal growth and mortality, (ii) quantifying the spatio-temporal variability in glacier ice algal biomass and processes involved in cell redistribution and (iii) determining the albedo feedbacks between algal biomass and weathering crust characteristics. Addressing these key research priorities will allow us to better understand the supraglacial ice-algal system and to develop an integrated model incorporating the algal and physical controls on ice surface albedo.

Originalsprog	Engelsk
Tidsskrift	Annals of Glaciology
Vol/bind	63
Nummer	87-89
Sider (fra-til)	95-100
Antal sider	6
ISSN	0260-3055
DOI	https://doi.org/10.1017/aog.2023.17
Status	Udgivet - 11 sep. 2022

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10.1017/aog.2023.17Licens: CC BY

dark-ice-in-a-warming-world-advances-and-challenges-in-the-study-of-greenland-ice-sheets-biological-darkeningForlagets udgivne version, 1,11 MBLicens: CC BY

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abstract = "The surface of the Greenland Ice Sheet is darkening, which accelerates its surface melt. The role of glacier ice algae in reducing surface albedo is widely recognised but not well quantified and the feedbacks between the algae and the weathering crust remain poorly understood. In this letter, we summarise recent advances in the study of the biological darkening of the Greenland Ice Sheet and highlight three key research priorities that are required to better understand and forecast algal-driven melt: (i) identifying the controls on glacier ice algal growth and mortality, (ii) quantifying the spatio-temporal variability in glacier ice algal biomass and processes involved in cell redistribution and (iii) determining the albedo feedbacks between algal biomass and weathering crust characteristics. Addressing these key research priorities will allow us to better understand the supraglacial ice-algal system and to develop an integrated model incorporating the algal and physical controls on ice surface albedo.",

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Dark ice in a warming world: advances and challenges in the study of Greenland Ice Sheet's biological darkening. / Halbach, Laura; Chevrollier, Lou Anne ; Cook, Joseph M. et al.
I: Annals of Glaciology, Bind 63, Nr. 87-89, 11.09.2022, s. 95-100.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

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AU - Halbach, Laura

AU - Chevrollier, Lou Anne

AU - Cook, Joseph M.

AU - Stevens, Ian T.

AU - Hansen, Martin

AU - Anesio, Alexandre M.

AU - Benning, Liane G.

AU - Tranter, Martyn

PY - 2022/9/11

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N2 - The surface of the Greenland Ice Sheet is darkening, which accelerates its surface melt. The role of glacier ice algae in reducing surface albedo is widely recognised but not well quantified and the feedbacks between the algae and the weathering crust remain poorly understood. In this letter, we summarise recent advances in the study of the biological darkening of the Greenland Ice Sheet and highlight three key research priorities that are required to better understand and forecast algal-driven melt: (i) identifying the controls on glacier ice algal growth and mortality, (ii) quantifying the spatio-temporal variability in glacier ice algal biomass and processes involved in cell redistribution and (iii) determining the albedo feedbacks between algal biomass and weathering crust characteristics. Addressing these key research priorities will allow us to better understand the supraglacial ice-algal system and to develop an integrated model incorporating the algal and physical controls on ice surface albedo.

AB - The surface of the Greenland Ice Sheet is darkening, which accelerates its surface melt. The role of glacier ice algae in reducing surface albedo is widely recognised but not well quantified and the feedbacks between the algae and the weathering crust remain poorly understood. In this letter, we summarise recent advances in the study of the biological darkening of the Greenland Ice Sheet and highlight three key research priorities that are required to better understand and forecast algal-driven melt: (i) identifying the controls on glacier ice algal growth and mortality, (ii) quantifying the spatio-temporal variability in glacier ice algal biomass and processes involved in cell redistribution and (iii) determining the albedo feedbacks between algal biomass and weathering crust characteristics. Addressing these key research priorities will allow us to better understand the supraglacial ice-algal system and to develop an integrated model incorporating the algal and physical controls on ice surface albedo.

KW - Albedo

KW - BioSNICAR

KW - glacier ice algae

KW - growth

KW - hydrology

KW - model

KW - mortality

KW - weathering crust

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Dark ice in a warming world: advances and challenges in the study of Greenland Ice Sheet's biological darkening

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