Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities
International audience Colored dissolved organic matter (CDOM), a significant fraction of dissolved organic carbon (DOC), plays various roles in physical and biogeochemical processes in natural waters. In the Arctic Ocean, CDOM is abundant because of major input by large rivers. To better understand...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2015
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Subjects: | |
Online Access: | https://hal.sorbonne-universite.fr/hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307/document https://hal.sorbonne-universite.fr/hal-01120307/file/Matsuoka_Characteristics_of.pdf https://doi.org/10.1016/j.dsr2.2015.02.012 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology Matsuoka, Atsushi Ortega-Retuerta, Eva Bricaud, Annick Arrigo, Kevin R Babin, Marcel Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
description |
International audience Colored dissolved organic matter (CDOM), a significant fraction of dissolved organic carbon (DOC), plays various roles in physical and biogeochemical processes in natural waters. In the Arctic Ocean, CDOM is abundant because of major input by large rivers. To better understand the processes that drive variations in CDOM, light absorption coefficients of CDOM [aCDOM(λ), m−1] were extensively documented together with temperature, salinity, chlorophyll a, nitrate concentrations, and bacterial production (BP) and abundance (BA) in the Western Arctic Ocean (WAO) from early to late summer as part of the MALINA and the ICESCAPE expeditions. The data set covered contrasting situations, from bloom to post-bloom conditions and from river-influenced to oceanic water masses. While CDOM photobleaching occurred in the surface layer (< 20 m), we observed significantly lower spectral slopes for CDOM absorption spectra (SCDOM) in addition to higher aCDOM(4 4 0) in the layer below (intermediate layer: 30.7<salinity<33.9). In particular, the low SCDOM values were found in the Chukchi Sea and the western part of the Beaufort Sea, which coincided with high BP and BA values. Considering the high primary production observed in these areas during our cruises ( Arrigo et al., 2012), we hypothesize that SCDOM variations reflect the degradation of phytoplankton that is associated with heterotrophic bacterial activity. In our datasets, a simple regression analysis showed that SCDOM was significantly correlated with BP and BA. A principal component analysis further supported this conclusion. From our field observations, it was shown that variations in aCDOM(4 4 0) and SCDOM result to a large extent from bacterial activity, at least in the WAO. |
author2 |
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) Laboratoire d'Océanographie Microbienne (LOMIC) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Marine Biology and Oceanography Barcelone Institute of Marine Sciences / Institut de Ciències del Mar Barcelona (ICM) Consejo Superior de Investigaciones Científicas Madrid (CSIC)-Consejo Superior de Investigaciones Científicas Madrid (CSIC) Department of Earth System Science Stanford (ESS) Stanford EARTH Stanford University-Stanford University |
format |
Article in Journal/Newspaper |
author |
Matsuoka, Atsushi Ortega-Retuerta, Eva Bricaud, Annick Arrigo, Kevin R Babin, Marcel |
author_facet |
Matsuoka, Atsushi Ortega-Retuerta, Eva Bricaud, Annick Arrigo, Kevin R Babin, Marcel |
author_sort |
Matsuoka, Atsushi |
title |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities |
title_short |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities |
title_full |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities |
title_fullStr |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities |
title_full_unstemmed |
Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities |
title_sort |
characteristics of colored dissolved organic matter (cdom) in the western arctic ocean: relationships with microbial activities |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.sorbonne-universite.fr/hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307/document https://hal.sorbonne-universite.fr/hal-01120307/file/Matsuoka_Characteristics_of.pdf https://doi.org/10.1016/j.dsr2.2015.02.012 |
geographic |
Arctic Arctic Ocean Chukchi Sea |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea |
genre |
Arctic Arctic Ocean Beaufort Sea Chukchi Chukchi Sea Phytoplankton |
genre_facet |
Arctic Arctic Ocean Beaufort Sea Chukchi Chukchi Sea Phytoplankton |
op_source |
ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.sorbonne-universite.fr/hal-01120307 Deep Sea Research Part II: Topical Studies in Oceanography, 2015, 118 (Part A), pp.44-52. ⟨10.1016/j.dsr2.2015.02.012⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2015.02.012 hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307/document https://hal.sorbonne-universite.fr/hal-01120307/file/Matsuoka_Characteristics_of.pdf doi:10.1016/j.dsr2.2015.02.012 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2015.02.012 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
118 |
container_start_page |
44 |
op_container_end_page |
52 |
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1766327907575136256 |
spelling |
ftunivnantes:oai:HAL:hal-01120307v1 2023-05-15T14:55:54+02:00 Characteristics of colored dissolved organic matter (CDOM) in the Western Arctic Ocean: relationships with microbial activities Matsuoka, Atsushi Ortega-Retuerta, Eva Bricaud, Annick Arrigo, Kevin R Babin, Marcel 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) Laboratoire d'Océanographie Microbienne (LOMIC) Observatoire océanologique de Banyuls (OOB) Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Department of Marine Biology and Oceanography Barcelone Institute of Marine Sciences / Institut de Ciències del Mar Barcelona (ICM) Consejo Superior de Investigaciones Científicas Madrid (CSIC)-Consejo Superior de Investigaciones Científicas Madrid (CSIC) Department of Earth System Science Stanford (ESS) Stanford EARTH Stanford University-Stanford University 2015-02-10 https://hal.sorbonne-universite.fr/hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307/document https://hal.sorbonne-universite.fr/hal-01120307/file/Matsuoka_Characteristics_of.pdf https://doi.org/10.1016/j.dsr2.2015.02.012 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.dsr2.2015.02.012 hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307 https://hal.sorbonne-universite.fr/hal-01120307/document https://hal.sorbonne-universite.fr/hal-01120307/file/Matsuoka_Characteristics_of.pdf doi:10.1016/j.dsr2.2015.02.012 info:eu-repo/semantics/OpenAccess ISSN: 0967-0645 Deep Sea Research Part II: Topical Studies in Oceanography https://hal.sorbonne-universite.fr/hal-01120307 Deep Sea Research Part II: Topical Studies in Oceanography, 2015, 118 (Part A), pp.44-52. ⟨10.1016/j.dsr2.2015.02.012⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology info:eu-repo/semantics/article Journal articles 2015 ftunivnantes https://doi.org/10.1016/j.dsr2.2015.02.012 2023-03-08T07:33:51Z International audience Colored dissolved organic matter (CDOM), a significant fraction of dissolved organic carbon (DOC), plays various roles in physical and biogeochemical processes in natural waters. In the Arctic Ocean, CDOM is abundant because of major input by large rivers. To better understand the processes that drive variations in CDOM, light absorption coefficients of CDOM [aCDOM(λ), m−1] were extensively documented together with temperature, salinity, chlorophyll a, nitrate concentrations, and bacterial production (BP) and abundance (BA) in the Western Arctic Ocean (WAO) from early to late summer as part of the MALINA and the ICESCAPE expeditions. The data set covered contrasting situations, from bloom to post-bloom conditions and from river-influenced to oceanic water masses. While CDOM photobleaching occurred in the surface layer (< 20 m), we observed significantly lower spectral slopes for CDOM absorption spectra (SCDOM) in addition to higher aCDOM(4 4 0) in the layer below (intermediate layer: 30.7<salinity<33.9). In particular, the low SCDOM values were found in the Chukchi Sea and the western part of the Beaufort Sea, which coincided with high BP and BA values. Considering the high primary production observed in these areas during our cruises ( Arrigo et al., 2012), we hypothesize that SCDOM variations reflect the degradation of phytoplankton that is associated with heterotrophic bacterial activity. In our datasets, a simple regression analysis showed that SCDOM was significantly correlated with BP and BA. A principal component analysis further supported this conclusion. From our field observations, it was shown that variations in aCDOM(4 4 0) and SCDOM result to a large extent from bacterial activity, at least in the WAO. Article in Journal/Newspaper Arctic Arctic Ocean Beaufort Sea Chukchi Chukchi Sea Phytoplankton Université de Nantes: HAL-UNIV-NANTES Arctic Arctic Ocean Chukchi Sea Deep Sea Research Part II: Topical Studies in Oceanography 118 44 52 |