New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements

The radiative transfer of shortwave solar radiation through the sea ice cover of the polar oceans is a crucial aspect of energy partitioning at the atmosphere–ice–ocean interface. A detailed understanding of how sunlight is reflected and transmitted by the sea ice cover is needed for an accurate rep...

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Published in:The Cryosphere
Main Authors: Katlein, Christian, Valcic, Lovro, Lambert-Girard, Simon, Hoppmann, Mario
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2021
Subjects:
Online Access:https://doi.org/10.5194/tc-15-183-2021
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spelling ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00055216 2023-05-15T16:39:31+02:00 New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements Katlein, Christian Valcic, Lovro Lambert-Girard, Simon Hoppmann, Mario 2021-01 electronic https://doi.org/10.5194/tc-15-183-2021 https://noa.gwlb.de/receive/cop_mods_00055216 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054867/tc-15-183-2021.pdf https://tc.copernicus.org/articles/15/183/2021/tc-15-183-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-183-2021 https://noa.gwlb.de/receive/cop_mods_00055216 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054867/tc-15-183-2021.pdf https://tc.copernicus.org/articles/15/183/2021/tc-15-183-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-183-2021 2022-02-08T22:34:40Z The radiative transfer of shortwave solar radiation through the sea ice cover of the polar oceans is a crucial aspect of energy partitioning at the atmosphere–ice–ocean interface. A detailed understanding of how sunlight is reflected and transmitted by the sea ice cover is needed for an accurate representation of critical processes in climate and ecosystem models, such as the ice–albedo feedback. Due to the challenges associated with ice internal measurements, most information about radiative transfer in sea ice has been gained by optical measurements above and below the sea ice. To improve our understanding of radiative transfer processes within the ice itself, we developed a new kind of instrument equipped with a number of multispectral light sensors that can be frozen into the ice. A first prototype consisting of a 2.3 m long chain of 48 sideward planar irradiance sensors with a vertical spacing of 0.05 m was deployed at the geographic North Pole in late August 2018, providing autonomous, vertically resolved light measurements within the ice cover during the autumn season. Here we present the first results of this instrument, discuss the advantages and application of the prototype, and provide first new insights into the spatiotemporal aspect of radiative transfer within the sea ice itself. In particular, we investigate how measured attenuation coefficients relate to the optical properties of the ice pack and show that sideward planar irradiance measurements are equivalent to measurements of total scalar irradiance. Article in Journal/Newspaper ice pack North Pole Sea ice The Cryosphere Niedersächsisches Online-Archiv NOA North Pole The Cryosphere 15 1 183 198
institution Open Polar
collection Niedersächsisches Online-Archiv NOA
op_collection_id ftnonlinearchiv
language English
topic article
Verlagsveröffentlichung
spellingShingle article
Verlagsveröffentlichung
Katlein, Christian
Valcic, Lovro
Lambert-Girard, Simon
Hoppmann, Mario
New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
topic_facet article
Verlagsveröffentlichung
description The radiative transfer of shortwave solar radiation through the sea ice cover of the polar oceans is a crucial aspect of energy partitioning at the atmosphere–ice–ocean interface. A detailed understanding of how sunlight is reflected and transmitted by the sea ice cover is needed for an accurate representation of critical processes in climate and ecosystem models, such as the ice–albedo feedback. Due to the challenges associated with ice internal measurements, most information about radiative transfer in sea ice has been gained by optical measurements above and below the sea ice. To improve our understanding of radiative transfer processes within the ice itself, we developed a new kind of instrument equipped with a number of multispectral light sensors that can be frozen into the ice. A first prototype consisting of a 2.3 m long chain of 48 sideward planar irradiance sensors with a vertical spacing of 0.05 m was deployed at the geographic North Pole in late August 2018, providing autonomous, vertically resolved light measurements within the ice cover during the autumn season. Here we present the first results of this instrument, discuss the advantages and application of the prototype, and provide first new insights into the spatiotemporal aspect of radiative transfer within the sea ice itself. In particular, we investigate how measured attenuation coefficients relate to the optical properties of the ice pack and show that sideward planar irradiance measurements are equivalent to measurements of total scalar irradiance.
format Article in Journal/Newspaper
author Katlein, Christian
Valcic, Lovro
Lambert-Girard, Simon
Hoppmann, Mario
author_facet Katlein, Christian
Valcic, Lovro
Lambert-Girard, Simon
Hoppmann, Mario
author_sort Katlein, Christian
title New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
title_short New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
title_full New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
title_fullStr New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
title_full_unstemmed New insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
title_sort new insights into radiative transfer within sea ice derived from autonomous optical propagation measurements
publisher Copernicus Publications
publishDate 2021
url https://doi.org/10.5194/tc-15-183-2021
https://noa.gwlb.de/receive/cop_mods_00055216
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054867/tc-15-183-2021.pdf
https://tc.copernicus.org/articles/15/183/2021/tc-15-183-2021.pdf
geographic North Pole
geographic_facet North Pole
genre ice pack
North Pole
Sea ice
The Cryosphere
genre_facet ice pack
North Pole
Sea ice
The Cryosphere
op_relation The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424
https://doi.org/10.5194/tc-15-183-2021
https://noa.gwlb.de/receive/cop_mods_00055216
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00054867/tc-15-183-2021.pdf
https://tc.copernicus.org/articles/15/183/2021/tc-15-183-2021.pdf
op_rights https://creativecommons.org/licenses/by/4.0/
uneingeschränkt
info:eu-repo/semantics/openAccess
op_rightsnorm CC-BY
op_doi https://doi.org/10.5194/tc-15-183-2021
container_title The Cryosphere
container_volume 15
container_issue 1
container_start_page 183
op_container_end_page 198
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