Extreme Low Light Requirement for Algae Growth Underneath Sea Ice : A Case Study From Station Nord, NE Greenland. / Hancke, Kaspar; Lund-Hansen, Lars; Lamare, Maxim; Højlund Pedersen, Stine; King, Martin; Andersen, Per; Sorrel, Brian.

In: Journal of Geophysical Research: Oceans , Vol. 123, No. 2, 02.2018, p. 985-1000.

Research output: Contribution to journalArticlepeer-review

Published

Standard

Extreme Low Light Requirement for Algae Growth Underneath Sea Ice : A Case Study From Station Nord, NE Greenland. / Hancke, Kaspar; Lund-Hansen, Lars; Lamare, Maxim; Højlund Pedersen, Stine; King, Martin; Andersen, Per; Sorrel, Brian.

In: Journal of Geophysical Research: Oceans , Vol. 123, No. 2, 02.2018, p. 985-1000.

Research output: Contribution to journalArticlepeer-review

Harvard

Hancke, K, Lund-Hansen, L, Lamare, M, Højlund Pedersen, S, King, M, Andersen, P & Sorrel, B 2018, 'Extreme Low Light Requirement for Algae Growth Underneath Sea Ice: A Case Study From Station Nord, NE Greenland', Journal of Geophysical Research: Oceans , vol. 123, no. 2, pp. 985-1000. https://doi.org/10.1002/2017JC013263

APA

Hancke, K., Lund-Hansen, L., Lamare, M., Højlund Pedersen, S., King, M., Andersen, P., & Sorrel, B. (2018). Extreme Low Light Requirement for Algae Growth Underneath Sea Ice: A Case Study From Station Nord, NE Greenland. Journal of Geophysical Research: Oceans , 123(2), 985-1000. https://doi.org/10.1002/2017JC013263

Vancouver

Hancke K, Lund-Hansen L, Lamare M, Højlund Pedersen S, King M, Andersen P et al. Extreme Low Light Requirement for Algae Growth Underneath Sea Ice: A Case Study From Station Nord, NE Greenland. Journal of Geophysical Research: Oceans . 2018 Feb;123(2):985-1000. https://doi.org/10.1002/2017JC013263

Author

Hancke, Kaspar ; Lund-Hansen, Lars ; Lamare, Maxim ; Højlund Pedersen, Stine ; King, Martin ; Andersen, Per ; Sorrel, Brian. / Extreme Low Light Requirement for Algae Growth Underneath Sea Ice : A Case Study From Station Nord, NE Greenland. In: Journal of Geophysical Research: Oceans . 2018 ; Vol. 123, No. 2. pp. 985-1000.

BibTeX

@article{8942d6c84f2b49e2a1b7401507e3524f,
title = "Extreme Low Light Requirement for Algae Growth Underneath Sea Ice: A Case Study From Station Nord, NE Greenland",
abstract = "Microalgae colonizing the underside of sea ice in spring are a key component of the Arctic foodweb as they drive early primary production and transport of carbon from the atmosphere to the ocean interior. Onset of the spring bloom of ice algae is typically limited by the availability of light, and the current consensus is that a few tens-of-centimeters of snow is enough to prevent sufficient solar radiation to reach underneath the sea ice. We challenge this consensus, and investigated the onset and the light requirement of an ice algae spring bloom, and the importance of snow optical properties for light penetration. Colonization by ice algae began in May under >1 m of first-year sea ice with ∼1 m thick snow cover on top, in NE Greenland. The initial growth of ice algae began at extremely low irradiance (<0.17 μmol photons m−2 s−1) and was documented as an increase in Chlorophyll a concentration, an increase in algal cell number, and a viable photosynthetic activity. Snow thickness changed little during May (from 110 to 91 cm), however the snow temperature increased steadily, as observed from automated high-frequency temperature profiles. We propose that changes in snow optical properties, caused by temperature-driven snow metamorphosis, was the primary driver for allowing sufficient light to penetrate through the thick snow and initiate algae growth below the sea ice. This was supported by radiative-transfer modelling of light attenuation. Implications are an earlier productivity by ice algae in Arctic sea ice than recognized previously. ",
author = "Kaspar Hancke and Lars Lund-Hansen and Maxim Lamare and {H{\o}jlund Pedersen}, Stine and Martin King and Per Andersen and Brian Sorrel",
year = "2018",
month = feb,
doi = "10.1002/2017JC013263",
language = "English",
volume = "123",
pages = "985--1000",
journal = "Journal of Geophysical Research: Oceans ",
issn = "2169-9291",
number = "2",

}

RIS

TY - JOUR

T1 - Extreme Low Light Requirement for Algae Growth Underneath Sea Ice

T2 - A Case Study From Station Nord, NE Greenland

AU - Hancke, Kaspar

AU - Lund-Hansen, Lars

AU - Lamare, Maxim

AU - Højlund Pedersen, Stine

AU - King, Martin

AU - Andersen, Per

AU - Sorrel, Brian

PY - 2018/2

Y1 - 2018/2

N2 - Microalgae colonizing the underside of sea ice in spring are a key component of the Arctic foodweb as they drive early primary production and transport of carbon from the atmosphere to the ocean interior. Onset of the spring bloom of ice algae is typically limited by the availability of light, and the current consensus is that a few tens-of-centimeters of snow is enough to prevent sufficient solar radiation to reach underneath the sea ice. We challenge this consensus, and investigated the onset and the light requirement of an ice algae spring bloom, and the importance of snow optical properties for light penetration. Colonization by ice algae began in May under >1 m of first-year sea ice with ∼1 m thick snow cover on top, in NE Greenland. The initial growth of ice algae began at extremely low irradiance (<0.17 μmol photons m−2 s−1) and was documented as an increase in Chlorophyll a concentration, an increase in algal cell number, and a viable photosynthetic activity. Snow thickness changed little during May (from 110 to 91 cm), however the snow temperature increased steadily, as observed from automated high-frequency temperature profiles. We propose that changes in snow optical properties, caused by temperature-driven snow metamorphosis, was the primary driver for allowing sufficient light to penetrate through the thick snow and initiate algae growth below the sea ice. This was supported by radiative-transfer modelling of light attenuation. Implications are an earlier productivity by ice algae in Arctic sea ice than recognized previously.

AB - Microalgae colonizing the underside of sea ice in spring are a key component of the Arctic foodweb as they drive early primary production and transport of carbon from the atmosphere to the ocean interior. Onset of the spring bloom of ice algae is typically limited by the availability of light, and the current consensus is that a few tens-of-centimeters of snow is enough to prevent sufficient solar radiation to reach underneath the sea ice. We challenge this consensus, and investigated the onset and the light requirement of an ice algae spring bloom, and the importance of snow optical properties for light penetration. Colonization by ice algae began in May under >1 m of first-year sea ice with ∼1 m thick snow cover on top, in NE Greenland. The initial growth of ice algae began at extremely low irradiance (<0.17 μmol photons m−2 s−1) and was documented as an increase in Chlorophyll a concentration, an increase in algal cell number, and a viable photosynthetic activity. Snow thickness changed little during May (from 110 to 91 cm), however the snow temperature increased steadily, as observed from automated high-frequency temperature profiles. We propose that changes in snow optical properties, caused by temperature-driven snow metamorphosis, was the primary driver for allowing sufficient light to penetrate through the thick snow and initiate algae growth below the sea ice. This was supported by radiative-transfer modelling of light attenuation. Implications are an earlier productivity by ice algae in Arctic sea ice than recognized previously.

U2 - 10.1002/2017JC013263

DO - 10.1002/2017JC013263

M3 - Article

VL - 123

SP - 985

EP - 1000

JO - Journal of Geophysical Research: Oceans

JF - Journal of Geophysical Research: Oceans

SN - 2169-9291

IS - 2

ER -