Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting
International audience Ice melting in the Arctic Ocean exposes the surface water to more radiative energy with poorly understood effects on photo-biogeochemical processes and heat deposi-tion in the upper ocean. In August 2009, we documented the vertical variability of light absorbing components at...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2013
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660/document https://hal.sorbonne-universite.fr/hal-01537660/file/bg-10-6433-2013.pdf https://doi.org/10.5194/bg-10-6433-2013 |
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HAL Sorbonne Université |
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ftsorbonneuniv |
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English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] Bélanger, S. Cizmeli, S.A. Ehn, J. Matsuoka, A. Doxaran, D. Hooker, S. Babin, M. Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] |
description |
International audience Ice melting in the Arctic Ocean exposes the surface water to more radiative energy with poorly understood effects on photo-biogeochemical processes and heat deposi-tion in the upper ocean. In August 2009, we documented the vertical variability of light absorbing components at 37 stations located in the southeastern Beaufort Sea including both Mackenzie River-influenced waters and polar mixed layer waters. We found that melting multiyear ice released significant amount of non-algal particulates (NAP) near the sea surface relative to subsurface waters. NAP absorption coefficients at 440 nm (a NAP (440)) immediately below the sea surface were on average 3-fold (up to 10-fold) higher compared to subsurface values measured at 2–3 m depth. The impact of this unusual feature on the light transmission and remote sensing reflectance (R rs) was further examined using a ra-diative transfer model. A 10-fold particle enrichment homogeneously distributed in the first meter of the water column slightly reduced photosynthetically available and usable radiation (PAR and PUR) by ∼ 6 and ∼ 8 %, respectively, relative to a fully homogenous water column with low particle concentration. In terms of R rs , the particle enrichment significantly flattered the spectrum by reducing the R rs by up to 20 % in the blue-green spectral region (400–550 nm). These results highlight the impact of meltwater on the concentration of particles at sea surface, and the need for considering non-uniform vertical distribution of particles in such systems when interpreting remotely sensed ocean color. Spectral slope of a NAP spectra calculated in the UV (ultraviolet) domain decreased with depth suggesting that this parameter is sensitive to detritus composition and/or diagenesis state (e.g., POM (particulate organic matter) photobleaching). |
author2 |
Departement de Biologie, Chimie et Géographie Université du Québec à Rimouski (UQAR) Groupe de recherche sur les environnements nordiques BORÉAS Arctus Inc. (ARCTUS) University of Manitoba Winnipeg Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) NASA Goddard Space Flight Center (GSFC) |
format |
Article in Journal/Newspaper |
author |
Bélanger, S. Cizmeli, S.A. Ehn, J. Matsuoka, A. Doxaran, D. Hooker, S. Babin, M. |
author_facet |
Bélanger, S. Cizmeli, S.A. Ehn, J. Matsuoka, A. Doxaran, D. Hooker, S. Babin, M. |
author_sort |
Bélanger, S. |
title |
Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting |
title_short |
Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting |
title_full |
Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting |
title_fullStr |
Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting |
title_full_unstemmed |
Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting |
title_sort |
light absorption and partitioning in arctic ocean surface waters: impact of multiyear ice melting |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.sorbonne-universite.fr/hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660/document https://hal.sorbonne-universite.fr/hal-01537660/file/bg-10-6433-2013.pdf https://doi.org/10.5194/bg-10-6433-2013 |
geographic |
Arctic Arctic Ocean Mackenzie River |
geographic_facet |
Arctic Arctic Ocean Mackenzie River |
genre |
Arctic Arctic Ocean Beaufort Sea Mackenzie river |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Mackenzie river |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01537660 Biogeosciences, 2013, 10 (10), pp.6433 - 6452. ⟨10.5194/bg-10-6433-2013⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-10-6433-2013 hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660/document https://hal.sorbonne-universite.fr/hal-01537660/file/bg-10-6433-2013.pdf doi:10.5194/bg-10-6433-2013 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-10-6433-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
10 |
container_start_page |
6433 |
op_container_end_page |
6452 |
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1769004126972149760 |
spelling |
ftsorbonneuniv:oai:HAL:hal-01537660v1 2023-06-18T03:39:22+02:00 Light absorption and partitioning in Arctic Ocean surface waters: impact of multiyear ice melting Bélanger, S. Cizmeli, S.A. Ehn, J. Matsuoka, A. Doxaran, D. Hooker, S. Babin, M. Departement de Biologie, Chimie et Géographie Université du Québec à Rimouski (UQAR) Groupe de recherche sur les environnements nordiques BORÉAS Arctus Inc. (ARCTUS) University of Manitoba Winnipeg Takuvik Joint International Laboratory ULAVAL-CNRS Université Laval Québec (ULaval)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) NASA Goddard Space Flight Center (GSFC) 2013 https://hal.sorbonne-universite.fr/hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660/document https://hal.sorbonne-universite.fr/hal-01537660/file/bg-10-6433-2013.pdf https://doi.org/10.5194/bg-10-6433-2013 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-10-6433-2013 hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660 https://hal.sorbonne-universite.fr/hal-01537660/document https://hal.sorbonne-universite.fr/hal-01537660/file/bg-10-6433-2013.pdf doi:10.5194/bg-10-6433-2013 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.sorbonne-universite.fr/hal-01537660 Biogeosciences, 2013, 10 (10), pp.6433 - 6452. ⟨10.5194/bg-10-6433-2013⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph] info:eu-repo/semantics/article Journal articles 2013 ftsorbonneuniv https://doi.org/10.5194/bg-10-6433-2013 2023-06-06T23:49:35Z International audience Ice melting in the Arctic Ocean exposes the surface water to more radiative energy with poorly understood effects on photo-biogeochemical processes and heat deposi-tion in the upper ocean. In August 2009, we documented the vertical variability of light absorbing components at 37 stations located in the southeastern Beaufort Sea including both Mackenzie River-influenced waters and polar mixed layer waters. We found that melting multiyear ice released significant amount of non-algal particulates (NAP) near the sea surface relative to subsurface waters. NAP absorption coefficients at 440 nm (a NAP (440)) immediately below the sea surface were on average 3-fold (up to 10-fold) higher compared to subsurface values measured at 2–3 m depth. The impact of this unusual feature on the light transmission and remote sensing reflectance (R rs) was further examined using a ra-diative transfer model. A 10-fold particle enrichment homogeneously distributed in the first meter of the water column slightly reduced photosynthetically available and usable radiation (PAR and PUR) by ∼ 6 and ∼ 8 %, respectively, relative to a fully homogenous water column with low particle concentration. In terms of R rs , the particle enrichment significantly flattered the spectrum by reducing the R rs by up to 20 % in the blue-green spectral region (400–550 nm). These results highlight the impact of meltwater on the concentration of particles at sea surface, and the need for considering non-uniform vertical distribution of particles in such systems when interpreting remotely sensed ocean color. Spectral slope of a NAP spectra calculated in the UV (ultraviolet) domain decreased with depth suggesting that this parameter is sensitive to detritus composition and/or diagenesis state (e.g., POM (particulate organic matter) photobleaching). Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Mackenzie river HAL Sorbonne Université Arctic Arctic Ocean Mackenzie River Biogeosciences 10 10 6433 6452 |