Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing

Climate change significantly impacts Arctic shelf regions in terms of air temperature, ultraviolet radiation, melting of sea ice, precipitation, thawing of permafrost and coastal erosion. Direct consequences have been observed on the increasing Arctic river flow and a large amount of organic carbon...

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Published in:Biogeosciences
Main Authors: Doxaran, D., Ehn, J., Bélanger, S., Matsuoka, A., Hooker, S., Babin, M.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2012
Subjects:
Ice
Online Access:https://doi.org/10.5194/bg-9-3213-2012
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spelling ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00024635 2023-05-15T14:48:40+02:00 Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing Doxaran, D. Ehn, J. Bélanger, S. Matsuoka, A. Hooker, S. Babin, M. 2012-08 electronic https://doi.org/10.5194/bg-9-3213-2012 https://noa.gwlb.de/receive/cop_mods_00024635 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024590/bg-9-3213-2012.pdf https://bg.copernicus.org/articles/9/3213/2012/bg-9-3213-2012.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-9-3213-2012 https://noa.gwlb.de/receive/cop_mods_00024635 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024590/bg-9-3213-2012.pdf https://bg.copernicus.org/articles/9/3213/2012/bg-9-3213-2012.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2012 ftnonlinearchiv https://doi.org/10.5194/bg-9-3213-2012 2022-02-08T22:50:04Z Climate change significantly impacts Arctic shelf regions in terms of air temperature, ultraviolet radiation, melting of sea ice, precipitation, thawing of permafrost and coastal erosion. Direct consequences have been observed on the increasing Arctic river flow and a large amount of organic carbon sequestered in soils at high latitudes since the last glacial maximum can be expected to be delivered to the Arctic Ocean during the coming decade. Monitoring the fluxes and fate of this terrigenous organic carbon is problematic in such sparsely populated regions unless remote sensing techniques can be developed and proved to be operational. The main objective of this study is to develop an ocean colour algorithm to operationally monitor dynamics of suspended particulate matter (SPM) on the Mackenzie River continental shelf (Canadian Arctic Ocean) using satellite imagery. The water optical properties are documented across the study area and related to concentrations of SPM and particulate organic carbon (POC). Robust SPM and POC : SPM proxies are identified, such as the light backscattering and attenuation coefficients, and relationships are established between these optical and biogeochemical parameters. Following a semi-analytical approach, a regional SPM quantification relationship is obtained for the inversion of the water reflectance signal into SPM concentration. This relationship is reproduced based on independent field optical measurements. It is successfully applied to a selection of MODIS satellite data which allow estimating fluxes at the river mouth and monitoring the extension and dynamics of the Mackenzie River surface plume in 2009, 2010 and 2011. Good agreement is obtained with field observations representative of the whole water column in the river delta zone where terrigenous SPM is mainly constrained (out of short periods of maximum river outflow). Most of the seaward export of SPM is observed to occur within the west side of the river mouth. Future work will require the validation of the developed SPM regional algorithm based on match-ups with field measurements, then the routine application to ocean colour satellite data in order to better estimate the fluxes and fate of SPM and POC delivered by the Mackenzie River to the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Ice Mackenzie river permafrost Sea ice Niedersächsisches Online-Archiv NOA Arctic Arctic Ocean Mackenzie River Biogeosciences 9 8 3213 3229
institution Open Polar
collection Niedersächsisches Online-Archiv NOA
op_collection_id ftnonlinearchiv
language English
topic article
Verlagsveröffentlichung
spellingShingle article
Verlagsveröffentlichung
Doxaran, D.
Ehn, J.
Bélanger, S.
Matsuoka, A.
Hooker, S.
Babin, M.
Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing
topic_facet article
Verlagsveröffentlichung
description Climate change significantly impacts Arctic shelf regions in terms of air temperature, ultraviolet radiation, melting of sea ice, precipitation, thawing of permafrost and coastal erosion. Direct consequences have been observed on the increasing Arctic river flow and a large amount of organic carbon sequestered in soils at high latitudes since the last glacial maximum can be expected to be delivered to the Arctic Ocean during the coming decade. Monitoring the fluxes and fate of this terrigenous organic carbon is problematic in such sparsely populated regions unless remote sensing techniques can be developed and proved to be operational. The main objective of this study is to develop an ocean colour algorithm to operationally monitor dynamics of suspended particulate matter (SPM) on the Mackenzie River continental shelf (Canadian Arctic Ocean) using satellite imagery. The water optical properties are documented across the study area and related to concentrations of SPM and particulate organic carbon (POC). Robust SPM and POC : SPM proxies are identified, such as the light backscattering and attenuation coefficients, and relationships are established between these optical and biogeochemical parameters. Following a semi-analytical approach, a regional SPM quantification relationship is obtained for the inversion of the water reflectance signal into SPM concentration. This relationship is reproduced based on independent field optical measurements. It is successfully applied to a selection of MODIS satellite data which allow estimating fluxes at the river mouth and monitoring the extension and dynamics of the Mackenzie River surface plume in 2009, 2010 and 2011. Good agreement is obtained with field observations representative of the whole water column in the river delta zone where terrigenous SPM is mainly constrained (out of short periods of maximum river outflow). Most of the seaward export of SPM is observed to occur within the west side of the river mouth. Future work will require the validation of the developed SPM regional algorithm based on match-ups with field measurements, then the routine application to ocean colour satellite data in order to better estimate the fluxes and fate of SPM and POC delivered by the Mackenzie River to the Arctic Ocean.
format Article in Journal/Newspaper
author Doxaran, D.
Ehn, J.
Bélanger, S.
Matsuoka, A.
Hooker, S.
Babin, M.
author_facet Doxaran, D.
Ehn, J.
Bélanger, S.
Matsuoka, A.
Hooker, S.
Babin, M.
author_sort Doxaran, D.
title Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing
title_short Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing
title_full Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing
title_fullStr Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing
title_full_unstemmed Optical characterisation of suspended particles in the Mackenzie River plume (Canadian Arctic Ocean) and implications for ocean colour remote sensing
title_sort optical characterisation of suspended particles in the mackenzie river plume (canadian arctic ocean) and implications for ocean colour remote sensing
publisher Copernicus Publications
publishDate 2012
url https://doi.org/10.5194/bg-9-3213-2012
https://noa.gwlb.de/receive/cop_mods_00024635
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024590/bg-9-3213-2012.pdf
https://bg.copernicus.org/articles/9/3213/2012/bg-9-3213-2012.pdf
geographic Arctic
Arctic Ocean
Mackenzie River
geographic_facet Arctic
Arctic Ocean
Mackenzie River
genre Arctic
Arctic Ocean
Climate change
Ice
Mackenzie river
permafrost
Sea ice
genre_facet Arctic
Arctic Ocean
Climate change
Ice
Mackenzie river
permafrost
Sea ice
op_relation Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189
https://doi.org/10.5194/bg-9-3213-2012
https://noa.gwlb.de/receive/cop_mods_00024635
https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00024590/bg-9-3213-2012.pdf
https://bg.copernicus.org/articles/9/3213/2012/bg-9-3213-2012.pdf
op_rights uneingeschränkt
info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.5194/bg-9-3213-2012
container_title Biogeosciences
container_volume 9
container_issue 8
container_start_page 3213
op_container_end_page 3229
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