Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N)
This is a study of the optical, physical and biological parameters of sea ice and the water below it at stations (n=25) in the central (>88°N) Eurasian sector of the Arctic Ocean during the summer 2012 record low sea-ice minimum extent. Results show that photosynthetically active radiation (PAR)...
Published in: | Polar Research |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2015
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Online Access: | https://portal.findresearcher.sdu.dk/da/publications/22513d0e-9d6a-4888-a37a-550da35444e8 https://doi.org/10.3402/polar.v34.23978 https://findresearcher.sdu.dk/ws/files/129760905/Effects_of_sea_ice_light_attenuation_and_CDOM_absorption_in_the_water_below_the_Eurasian_sector_of_central_Arctic_Ocean_88_N.pdf |
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ftsydanskunivpub:oai:sdu.dk:publications/22513d0e-9d6a-4888-a37a-550da35444e8 2023-05-15T14:26:00+02:00 Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) Lund-Hansen, Lars Chresten Markager, Stiig Hancke, Kasper Stratmann, Tanja Rysgaard, Søren Ramløv, Hans Sorrell, Brian K. 2015-09-01 application/pdf https://portal.findresearcher.sdu.dk/da/publications/22513d0e-9d6a-4888-a37a-550da35444e8 https://doi.org/10.3402/polar.v34.23978 https://findresearcher.sdu.dk/ws/files/129760905/Effects_of_sea_ice_light_attenuation_and_CDOM_absorption_in_the_water_below_the_Eurasian_sector_of_central_Arctic_Ocean_88_N.pdf eng eng info:eu-repo/semantics/openAccess Lund-Hansen , L C , Markager , S , Hancke , K , Stratmann , T , Rysgaard , S , Ramløv , H & Sorrell , B K 2015 , ' Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean ( >88°N) ' , Polar Research , vol. 34 , 23978 , pp. 1-12 . https://doi.org/10.3402/polar.v34.23978 sea ice transmittance PAR CDOM chl-a Eurasian sector article 2015 ftsydanskunivpub https://doi.org/10.3402/polar.v34.23978 2022-08-14T09:14:51Z This is a study of the optical, physical and biological parameters of sea ice and the water below it at stations (n=25) in the central (>88°N) Eurasian sector of the Arctic Ocean during the summer 2012 record low sea-ice minimum extent. Results show that photosynthetically active radiation (PAR) transmittance of the ice was low (0.09) and apparently related to a high degree of backscattering by air-filled brine channels left by brine draining. The under-ice PAR was also low (8.4±4.5 SD µmol photons m−2 s−1) and partly related to the low transmittance. There were no significant differences in multi-year and first-year PAR transmittances. In spite of this low under-ice PAR, only 3% of the transmitted PAR through the ice was absorbed by phytoplankton in the water. On average, chlorophyll-a concentrations were low (0.34±0.69 SD mg chl-a m−3) in the water compared to the high (a375=0.52 m−1) coloured dissolved organic matter (CDOM) absorption coefficient with a strong terrestrial optical signature. Two distinct clusters of stations with waters of Pacific and North Atlantic origin were identified based on significant differences in temperature, salinity and CDOM absorption coefficient between water masses. The under-ice light field for bare ice was parameterized as follows: Iz=Io(1−0.55)*(0.09)*exp(−0.17*z). Article in Journal/Newspaper Arctic Arctic Arctic Ocean North Atlantic Phytoplankton Polar Research Sea ice University of Southern Denmark Research Portal Arctic Arctic Ocean Pacific Polar Research 34 1 23978 |
institution |
Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
language |
English |
topic |
sea ice transmittance PAR CDOM chl-a Eurasian sector |
spellingShingle |
sea ice transmittance PAR CDOM chl-a Eurasian sector Lund-Hansen, Lars Chresten Markager, Stiig Hancke, Kasper Stratmann, Tanja Rysgaard, Søren Ramløv, Hans Sorrell, Brian K. Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) |
topic_facet |
sea ice transmittance PAR CDOM chl-a Eurasian sector |
description |
This is a study of the optical, physical and biological parameters of sea ice and the water below it at stations (n=25) in the central (>88°N) Eurasian sector of the Arctic Ocean during the summer 2012 record low sea-ice minimum extent. Results show that photosynthetically active radiation (PAR) transmittance of the ice was low (0.09) and apparently related to a high degree of backscattering by air-filled brine channels left by brine draining. The under-ice PAR was also low (8.4±4.5 SD µmol photons m−2 s−1) and partly related to the low transmittance. There were no significant differences in multi-year and first-year PAR transmittances. In spite of this low under-ice PAR, only 3% of the transmitted PAR through the ice was absorbed by phytoplankton in the water. On average, chlorophyll-a concentrations were low (0.34±0.69 SD mg chl-a m−3) in the water compared to the high (a375=0.52 m−1) coloured dissolved organic matter (CDOM) absorption coefficient with a strong terrestrial optical signature. Two distinct clusters of stations with waters of Pacific and North Atlantic origin were identified based on significant differences in temperature, salinity and CDOM absorption coefficient between water masses. The under-ice light field for bare ice was parameterized as follows: Iz=Io(1−0.55)*(0.09)*exp(−0.17*z). |
format |
Article in Journal/Newspaper |
author |
Lund-Hansen, Lars Chresten Markager, Stiig Hancke, Kasper Stratmann, Tanja Rysgaard, Søren Ramløv, Hans Sorrell, Brian K. |
author_facet |
Lund-Hansen, Lars Chresten Markager, Stiig Hancke, Kasper Stratmann, Tanja Rysgaard, Søren Ramløv, Hans Sorrell, Brian K. |
author_sort |
Lund-Hansen, Lars Chresten |
title |
Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) |
title_short |
Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) |
title_full |
Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) |
title_fullStr |
Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) |
title_full_unstemmed |
Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean (>88°N) |
title_sort |
effects of sea-ice light attenuation and cdom absorption in the water below the eurasian sector of central arctic ocean (>88°n) |
publishDate |
2015 |
url |
https://portal.findresearcher.sdu.dk/da/publications/22513d0e-9d6a-4888-a37a-550da35444e8 https://doi.org/10.3402/polar.v34.23978 https://findresearcher.sdu.dk/ws/files/129760905/Effects_of_sea_ice_light_attenuation_and_CDOM_absorption_in_the_water_below_the_Eurasian_sector_of_central_Arctic_Ocean_88_N.pdf |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Arctic Ocean North Atlantic Phytoplankton Polar Research Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean North Atlantic Phytoplankton Polar Research Sea ice |
op_source |
Lund-Hansen , L C , Markager , S , Hancke , K , Stratmann , T , Rysgaard , S , Ramløv , H & Sorrell , B K 2015 , ' Effects of sea-ice light attenuation and CDOM absorption in the water below the Eurasian sector of central Arctic Ocean ( >88°N) ' , Polar Research , vol. 34 , 23978 , pp. 1-12 . https://doi.org/10.3402/polar.v34.23978 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3402/polar.v34.23978 |
container_title |
Polar Research |
container_volume |
34 |
container_issue |
1 |
container_start_page |
23978 |
_version_ |
1766298480621387776 |