UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009
International audience Surface waters from the Beaufort Sea in the Arctic Ocean were evaluated for dissolved organic carbon (DOC), and optical characteristics including UV (ultraviolet) radiation and PAR (photosynthetically active radiation) diffuse attenuation (K d ), and chromophoric and fluoresce...
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ftccsdartic:oai:HAL:hal-04110588v1 2023-06-18T03:39:38+02:00 UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 Para, J. Charrière, B. Matsuoka, A. Miller, W. L. Rontani, J. F. Sempéré, R. Centre d'océanologie de Marseille (COM) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Toulon (UTLN) Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2013 https://hal.science/hal-04110588 https://doi.org/10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 hal-04110588 https://hal.science/hal-04110588 BIBCODE: 2013BGeo.10.2761P doi:10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 Biogeosciences https://hal.science/hal-04110588 Biogeosciences, 2013, 10, pp.2761-2774. ⟨10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012⟩ Earth Science [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2013 ftccsdartic https://doi.org/10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 2023-06-03T23:53:14Z International audience Surface waters from the Beaufort Sea in the Arctic Ocean were evaluated for dissolved organic carbon (DOC), and optical characteristics including UV (ultraviolet) radiation and PAR (photosynthetically active radiation) diffuse attenuation (K d ), and chromophoric and fluorescent dissolved organic matter (CDOM and FDOM) as part of the MALINA field campaign (30 July to 27 August). Spectral absorption coefficients (a CDOM (350 nm) (m -1 )) were significantly correlated to both diffuse attenuation coefficients (K d ) in the UV-A and UV-B and to DOC concentrations. This indicates CDOM as the dominant attenuator of both UV and PAR solar radiation and suggests its use as an optical proxy for DOC concentrations in this region. While the Mackenzie input is the main driver of CDOM dynamics in low salinity waters, locally, primary production can create significant increases in CDOM. Extrapolating CDOM to DOC relationships, we estimate that ∼16% of the DOC in the Mackenzie River does not absorb radiation at 350 nm. The discharges of DOC and its chromophoric subset (CDOM) by the Mackenzie River during the MALINA cruise are estimated as ∼0.22 TgC and 0.18 TgC, respectively. Three dissolved fluorescent components (C1-C3) were identified by fluorescence excitation/emission matrix spectroscopy (EEMS) and parallel factor (PARAFAC) analysis. Our results showed an aquatic dissolved organic matter (DOM) component (C1), probably produced in the numerous lakes of the watershed, that co-dominated with a terrestrial humic-like component (C2) in the Mackenzie Delta Sector. This aquatic DOM could partially explain the high CDOM spectral slopes observed in the Beaufort Sea. Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Mackenzie Delta Mackenzie river Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean Mackenzie River Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Earth Science [SDU]Sciences of the Universe [physics] |
spellingShingle |
Earth Science [SDU]Sciences of the Universe [physics] Para, J. Charrière, B. Matsuoka, A. Miller, W. L. Rontani, J. F. Sempéré, R. UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 |
topic_facet |
Earth Science [SDU]Sciences of the Universe [physics] |
description |
International audience Surface waters from the Beaufort Sea in the Arctic Ocean were evaluated for dissolved organic carbon (DOC), and optical characteristics including UV (ultraviolet) radiation and PAR (photosynthetically active radiation) diffuse attenuation (K d ), and chromophoric and fluorescent dissolved organic matter (CDOM and FDOM) as part of the MALINA field campaign (30 July to 27 August). Spectral absorption coefficients (a CDOM (350 nm) (m -1 )) were significantly correlated to both diffuse attenuation coefficients (K d ) in the UV-A and UV-B and to DOC concentrations. This indicates CDOM as the dominant attenuator of both UV and PAR solar radiation and suggests its use as an optical proxy for DOC concentrations in this region. While the Mackenzie input is the main driver of CDOM dynamics in low salinity waters, locally, primary production can create significant increases in CDOM. Extrapolating CDOM to DOC relationships, we estimate that ∼16% of the DOC in the Mackenzie River does not absorb radiation at 350 nm. The discharges of DOC and its chromophoric subset (CDOM) by the Mackenzie River during the MALINA cruise are estimated as ∼0.22 TgC and 0.18 TgC, respectively. Three dissolved fluorescent components (C1-C3) were identified by fluorescence excitation/emission matrix spectroscopy (EEMS) and parallel factor (PARAFAC) analysis. Our results showed an aquatic dissolved organic matter (DOM) component (C1), probably produced in the numerous lakes of the watershed, that co-dominated with a terrestrial humic-like component (C2) in the Mackenzie Delta Sector. This aquatic DOM could partially explain the high CDOM spectral slopes observed in the Beaufort Sea. |
author2 |
Centre d'océanologie de Marseille (COM) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Université de Toulon (UTLN) Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Para, J. Charrière, B. Matsuoka, A. Miller, W. L. Rontani, J. F. Sempéré, R. |
author_facet |
Para, J. Charrière, B. Matsuoka, A. Miller, W. L. Rontani, J. F. Sempéré, R. |
author_sort |
Para, J. |
title |
UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 |
title_short |
UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 |
title_full |
UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 |
title_fullStr |
UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 |
title_full_unstemmed |
UV/PAR radiation and DOM properties in surface coastal waters of the Canadian shelf of the Beaufort Sea during summer 2009 |
title_sort |
uv/par radiation and dom properties in surface coastal waters of the canadian shelf of the beaufort sea during summer 2009 |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-04110588 https://doi.org/10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Arctic Ocean Mackenzie River Mackenzie Delta |
geographic_facet |
Arctic Arctic Ocean Mackenzie River Mackenzie Delta |
genre |
Arctic Arctic Ocean Beaufort Sea Mackenzie Delta Mackenzie river |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Mackenzie Delta Mackenzie river |
op_source |
Biogeosciences https://hal.science/hal-04110588 Biogeosciences, 2013, 10, pp.2761-2774. ⟨10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 hal-04110588 https://hal.science/hal-04110588 BIBCODE: 2013BGeo.10.2761P doi:10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 |
op_doi |
https://doi.org/10.5194/bg-10-2761-201310.5194/bgd-9-15567-2012 |
_version_ |
1769004348341223424 |