Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships
A data set of radiometric measurements collected in the Beaufort Sea (Canadian Arctic) in August 2009 (Malina project) is analyzed in order to describe apparent optical properties (AOPs) in this sea, which has been subject to dramatic environmental changes for several decades. The two properties der...
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ftdoajarticles:oai:doaj.org/article:3edae001941c4d13b54991634155f11d 2023-05-15T14:56:48+02:00 Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships D. Antoine S. B. Hooker S. Bélanger A. Matsuoka M. Babin 2013-07-01T00:00:00Z https://doi.org/10.5194/bg-10-4493-2013 https://doaj.org/article/3edae001941c4d13b54991634155f11d EN eng Copernicus Publications http://www.biogeosciences.net/10/4493/2013/bg-10-4493-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-4493-2013 1726-4170 1726-4189 https://doaj.org/article/3edae001941c4d13b54991634155f11d Biogeosciences, Vol 10, Iss 7, Pp 4493-4509 (2013) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/bg-10-4493-2013 2022-12-31T15:01:05Z A data set of radiometric measurements collected in the Beaufort Sea (Canadian Arctic) in August 2009 (Malina project) is analyzed in order to describe apparent optical properties (AOPs) in this sea, which has been subject to dramatic environmental changes for several decades. The two properties derived from the measurements are the spectral diffuse attenuation coefficient for downward irradiance, K d , and the spectral remote sensing reflectance, R rs . The former controls light propagation in the upper water column. The latter determines how light is backscattered out of the water and becomes eventually observable from a satellite ocean color sensor. The data set includes offshore clear waters of the Beaufort Basin as well as highly turbid waters of the Mackenzie River plumes. In the clear waters, we show K d values that are much larger in the ultraviolet and blue parts of the spectrum than what could be anticipated considering the chlorophyll concentration. A larger contribution of absorption by colored dissolved organic matter (CDOM) is responsible for these high K d values, as compared to other oligotrophic areas. In turbid waters, attenuation reaches extremely high values, driven by high loads of particulate materials and also by a large CDOM content. In these two extreme types of waters, current satellite chlorophyll algorithms fail. This questions the role of ocean color remote sensing in the Arctic when R rs from only the blue and green bands are used. Therefore, other parts of the spectrum (e.g., the red) should be explored if one aims at quantifying interannual changes in chlorophyll in the Arctic from space. The very peculiar AOPs in the Beaufort Sea also advocate for developing specific light propagation models when attempting to predict light availability for photosynthesis at depth. Article in Journal/Newspaper Arctic Beaufort Sea Mackenzie river Directory of Open Access Journals: DOAJ Articles Arctic Mackenzie River Biogeosciences 10 7 4493 4509 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 D. Antoine S. B. Hooker S. Bélanger A. Matsuoka M. Babin Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
A data set of radiometric measurements collected in the Beaufort Sea (Canadian Arctic) in August 2009 (Malina project) is analyzed in order to describe apparent optical properties (AOPs) in this sea, which has been subject to dramatic environmental changes for several decades. The two properties derived from the measurements are the spectral diffuse attenuation coefficient for downward irradiance, K d , and the spectral remote sensing reflectance, R rs . The former controls light propagation in the upper water column. The latter determines how light is backscattered out of the water and becomes eventually observable from a satellite ocean color sensor. The data set includes offshore clear waters of the Beaufort Basin as well as highly turbid waters of the Mackenzie River plumes. In the clear waters, we show K d values that are much larger in the ultraviolet and blue parts of the spectrum than what could be anticipated considering the chlorophyll concentration. A larger contribution of absorption by colored dissolved organic matter (CDOM) is responsible for these high K d values, as compared to other oligotrophic areas. In turbid waters, attenuation reaches extremely high values, driven by high loads of particulate materials and also by a large CDOM content. In these two extreme types of waters, current satellite chlorophyll algorithms fail. This questions the role of ocean color remote sensing in the Arctic when R rs from only the blue and green bands are used. Therefore, other parts of the spectrum (e.g., the red) should be explored if one aims at quantifying interannual changes in chlorophyll in the Arctic from space. The very peculiar AOPs in the Beaufort Sea also advocate for developing specific light propagation models when attempting to predict light availability for photosynthesis at depth. |
format |
Article in Journal/Newspaper |
author |
D. Antoine S. B. Hooker S. Bélanger A. Matsuoka M. Babin |
author_facet |
D. Antoine S. B. Hooker S. Bélanger A. Matsuoka M. Babin |
author_sort |
D. Antoine |
title |
Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships |
title_short |
Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships |
title_full |
Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships |
title_fullStr |
Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships |
title_full_unstemmed |
Apparent optical properties of the Canadian Beaufort Sea – Part 1: Observational overview and water column relationships |
title_sort |
apparent optical properties of the canadian beaufort sea – part 1: observational overview and water column relationships |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-4493-2013 https://doaj.org/article/3edae001941c4d13b54991634155f11d |
geographic |
Arctic Mackenzie River |
geographic_facet |
Arctic Mackenzie River |
genre |
Arctic Beaufort Sea Mackenzie river |
genre_facet |
Arctic Beaufort Sea Mackenzie river |
op_source |
Biogeosciences, Vol 10, Iss 7, Pp 4493-4509 (2013) |
op_relation |
http://www.biogeosciences.net/10/4493/2013/bg-10-4493-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-4493-2013 1726-4170 1726-4189 https://doaj.org/article/3edae001941c4d13b54991634155f11d |
op_doi |
https://doi.org/10.5194/bg-10-4493-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
7 |
container_start_page |
4493 |
op_container_end_page |
4509 |
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1766328863341674496 |