Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet

Marek Stibal; Jason E. Box; Karen A. Cameron; Peter L. Langen; Marian L. Yallop; Ruth H. Mottram; Alia L. Kahn; Noah P. Molotch; Nathan A. M. Chrismas; Filippo Calì Quaglia; Daniel Remias; C.J.P. Paul Smeets; Michiel R. van den Broeke; Jonatan C. Ryan; Alun Hubbart; Martyn Tranter; Dirk van As; Andreas P. Ahlström

doi:10.1002/2017GL075958

Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet

Marek Stibal, Jason E. Box, Karen A. Cameron, Peter L. Langen, Marian L. Yallop, Ruth H. Mottram, Alia L. Kahn, Noah P. Molotch, Nathan A. M. Chrismas, Filippo Calì Quaglia, Daniel Remias, C.J.P. Paul Smeets, Michiel R. van den Broeke, Jonatan C. Ryan, Alun Hubbart, Martyn Tranter, Dirk van As, Andreas P. Ahlström

Research Center Wels

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

102 Zitate (Scopus)

Abstract

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.

Originalsprache	Englisch
Seiten (von - bis)	11,463-11,471
Fachzeitschrift	Geophysical Research Letters
Jahrgang	44
Ausgabenummer	22
DOIs	https://doi.org/10.1002/2017GL075958 https://doi.org/10.1002/2017GL075958
Publikationsstatus	Veröffentlicht - 28 Nov. 2017

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Stibal, M., Box, J. E., Cameron, K. A., Langen, P. L., Yallop, M. L., Mottram, R. H., Kahn, A. L., Molotch, N. P., Chrismas, N. A. M., Quaglia, F. C., Remias, D., Smeets, C. J. P. P., van den Broeke, M. R., Ryan, J. C., Hubbart, A., Tranter, M., van As, D., & Ahlström, A. P. (2017). Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet. Geophysical Research Letters, 44(22), 11,463-11,471. https://doi.org/10.1002/2017GL075958, https://doi.org/10.1002/2017GL075958

@article{fbd370d7c5914c8b821dff967118b28d,

title = "Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet",

abstract = "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.",

keywords = "Greenland ice sheet, albedo, algae, light-absorbing impurities, meltings",

author = "Marek Stibal and Box, {Jason E.} and Cameron, {Karen A.} and Langen, {Peter L.} and Yallop, {Marian L.} and Mottram, {Ruth H.} and Kahn, {Alia L.} and Molotch, {Noah P.} and Chrismas, {Nathan A. M.} and Quaglia, {Filippo Cal{\`i}} and Daniel Remias and Smeets, {C.J.P. Paul} and {van den Broeke}, {Michiel R.} and Ryan, {Jonatan C.} and Alun Hubbart and Martyn Tranter and {van As}, Dirk and Ahlstr{\"o}m, {Andreas P.}",

note = "Publisher Copyright: {\textcopyright}2017. The Authors.",

year = "2017",

month = nov,

day = "28",

doi = "10.1002/2017GL075958",

language = "English",

volume = "44",

pages = "11,463--11,471",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "Wiley",

number = "22",

}

Stibal, M, Box, JE, Cameron, KA, Langen, PL, Yallop, ML, Mottram, RH, Kahn, AL, Molotch, NP, Chrismas, NAM, Quaglia, FC, Remias, D, Smeets, CJPP, van den Broeke, MR, Ryan, JC, Hubbart, A, Tranter, M, van As, D & Ahlström, AP 2017, 'Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet', Geophysical Research Letters, Jg. 44, Nr. 22, S. 11,463-11,471. https://doi.org/10.1002/2017GL075958, https://doi.org/10.1002/2017GL075958

TY - JOUR

T1 - Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet

AU - Stibal, Marek

AU - Box, Jason E.

AU - Cameron, Karen A.

AU - Langen, Peter L.

AU - Yallop, Marian L.

AU - Mottram, Ruth H.

AU - Kahn, Alia L.

AU - Molotch, Noah P.

AU - Chrismas, Nathan A. M.

AU - Quaglia, Filippo Calì

AU - Remias, Daniel

AU - Smeets, C.J.P. Paul

AU - van den Broeke, Michiel R.

AU - Ryan, Jonatan C.

AU - Hubbart, Alun

AU - Tranter, Martyn

AU - van As, Dirk

AU - Ahlström, Andreas P.

PY - 2017/11/28

Y1 - 2017/11/28

N2 - 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.

AB - 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.

KW - Greenland ice sheet

KW - albedo

KW - algae

KW - light-absorbing impurities

KW - meltings

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U2 - 10.1002/2017GL075958

DO - 10.1002/2017GL075958

M3 - Article

SN - 0094-8276

VL - 44

SP - 11,463-11,471

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 22

ER -

Algae Drive Enhanced Darkening of Bare Ice on the Greenland Ice Sheet

Abstract

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