Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean
International audience Weekly and bi-monthly carbonate system parameters and ancillary data were collected from 2008 to 2020 in three coastal ecosystems of the southern Western English Channel (sWEC) (SOMLIT-pier and SOMLIT-offshore) and Bay of Brest (SOMLIT-Brest) located in the North East Atlantic...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761/document https://hal.archives-ouvertes.fr/hal-03443761/file/Gac%20et%20al%202021.pdf https://doi.org/10.3389/fmars.2021.688008 |
id |
ftunivnantes:oai:HAL:hal-03443761v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
ocean acidification coastal ecosystem long-term monitoring NE Atlantic carbonate system dynamics [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
ocean acidification coastal ecosystem long-term monitoring NE Atlantic carbonate system dynamics [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes Gac, Jean-Philippe Marrec, Pierre Cariou, Thierry Grosstefan, Emilie Macé, Eric Rimmelin Maury, Peggy Vernet, Marc Bozec, Yann Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean |
topic_facet |
ocean acidification coastal ecosystem long-term monitoring NE Atlantic carbonate system dynamics [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Weekly and bi-monthly carbonate system parameters and ancillary data were collected from 2008 to 2020 in three coastal ecosystems of the southern Western English Channel (sWEC) (SOMLIT-pier and SOMLIT-offshore) and Bay of Brest (SOMLIT-Brest) located in the North East Atlantic Ocean. The main drivers of seasonal and interannual partial pressure of CO2 (pCO2) and dissolved inorganic carbon (DIC) variabilities were the net ecosystem production (NEP) and thermodynamics. Differences were observed between stations, with a higher biological influence on pCO2 and DIC in the near-shore ecosystems, driven by both benthic and pelagic communities. The impact of riverine inputs on DIC dynamics was more pronounced at SOMLIT-Brest (7%) than at SOMLIT-pier (3%) and SOMLIT-offshore (<1%). These three ecosystems acted as a weak source of CO2 to the atmosphere of 0.18 ± 0.10, 0.11 ± 0.12, and 0.39 ± 0.08 mol m–2 year–1, respectively. Interannually, air-sea CO2 fluxes (FCO2) variability was low at SOMLIT-offshore and SOMLIT-pier, whereas SOMLIT-Brest occasionally switched to weak annual sinks of atmospheric CO2, driven by enhanced spring NEP compared to annual means. Over the 2008–2018 period, monthly total alkalinity (TA) and DIC anomalies were characterized by significant positive trends (p-values < 0.001), from 0.49 ± 0.20 to 2.21 ± 0.39 μmol kg−1 year−1 for TA, and from 1.93 ± 0.28 to 2.98 ± 0.39 μmol kg–1 year–1 for DIC. These trends were associated with significant increases of calculated seawater pCO2, ranging from +2.95 ± 1.04 to 3.52 ± 0.47 μatm year–1, and strong reductions of calculated pHin situ, with a mean pHin situ decrease of 0.0028 year–1. This ocean acidification (OA) was driven by atmospheric CO2 forcing (57–66%), Sea surface temperature (SST) increase (31–37%), and changes in salinity (2–5%). Additional pHin situ data extended these observed trends to the 2008–2020 period and indicated an acceleration of OA, reflected by a mean pHin situ decrease of 0.0046 year–1 in the sWEC for ... |
author2 |
Adaptation et diversité en milieu marin (AD2M) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff (SBR) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) University of Rhode Island (URI) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Gac, Jean-Philippe Marrec, Pierre Cariou, Thierry Grosstefan, Emilie Macé, Eric Rimmelin Maury, Peggy Vernet, Marc Bozec, Yann |
author_facet |
Gac, Jean-Philippe Marrec, Pierre Cariou, Thierry Grosstefan, Emilie Macé, Eric Rimmelin Maury, Peggy Vernet, Marc Bozec, Yann |
author_sort |
Gac, Jean-Philippe |
title |
Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean |
title_short |
Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean |
title_full |
Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean |
title_fullStr |
Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean |
title_full_unstemmed |
Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean |
title_sort |
decadal dynamics of the co2 system and associated ocean acidification in coastal ecosystems of the north east atlantic ocean |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761/document https://hal.archives-ouvertes.fr/hal-03443761/file/Gac%20et%20al%202021.pdf https://doi.org/10.3389/fmars.2021.688008 |
genre |
North East Atlantic Ocean acidification |
genre_facet |
North East Atlantic Ocean acidification |
op_source |
ISSN: 2296-7745 Frontiers in Marine Science https://hal.archives-ouvertes.fr/hal-03443761 Frontiers in Marine Science, Frontiers Media, 2021, 8, pp.688008. ⟨10.3389/fmars.2021.688008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2021.688008 hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761/document https://hal.archives-ouvertes.fr/hal-03443761/file/Gac%20et%20al%202021.pdf doi:10.3389/fmars.2021.688008 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fmars.2021.688008 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1766138852666245120 |
spelling |
ftunivnantes:oai:HAL:hal-03443761v1 2023-05-15T17:38:25+02:00 Decadal Dynamics of the CO2 System and Associated Ocean Acidification in Coastal Ecosystems of the North East Atlantic Ocean Gac, Jean-Philippe Marrec, Pierre Cariou, Thierry Grosstefan, Emilie Macé, Eric Rimmelin Maury, Peggy Vernet, Marc Bozec, Yann Adaptation et diversité en milieu marin (AD2M) Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Station biologique de Roscoff (SBR) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) University of Rhode Island (URI) Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2021 https://hal.archives-ouvertes.fr/hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761/document https://hal.archives-ouvertes.fr/hal-03443761/file/Gac%20et%20al%202021.pdf https://doi.org/10.3389/fmars.2021.688008 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2021.688008 hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761 https://hal.archives-ouvertes.fr/hal-03443761/document https://hal.archives-ouvertes.fr/hal-03443761/file/Gac%20et%20al%202021.pdf doi:10.3389/fmars.2021.688008 info:eu-repo/semantics/OpenAccess ISSN: 2296-7745 Frontiers in Marine Science https://hal.archives-ouvertes.fr/hal-03443761 Frontiers in Marine Science, Frontiers Media, 2021, 8, pp.688008. ⟨10.3389/fmars.2021.688008⟩ ocean acidification coastal ecosystem long-term monitoring NE Atlantic carbonate system dynamics [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.3389/fmars.2021.688008 2022-09-27T23:09:35Z International audience Weekly and bi-monthly carbonate system parameters and ancillary data were collected from 2008 to 2020 in three coastal ecosystems of the southern Western English Channel (sWEC) (SOMLIT-pier and SOMLIT-offshore) and Bay of Brest (SOMLIT-Brest) located in the North East Atlantic Ocean. The main drivers of seasonal and interannual partial pressure of CO2 (pCO2) and dissolved inorganic carbon (DIC) variabilities were the net ecosystem production (NEP) and thermodynamics. Differences were observed between stations, with a higher biological influence on pCO2 and DIC in the near-shore ecosystems, driven by both benthic and pelagic communities. The impact of riverine inputs on DIC dynamics was more pronounced at SOMLIT-Brest (7%) than at SOMLIT-pier (3%) and SOMLIT-offshore (<1%). These three ecosystems acted as a weak source of CO2 to the atmosphere of 0.18 ± 0.10, 0.11 ± 0.12, and 0.39 ± 0.08 mol m–2 year–1, respectively. Interannually, air-sea CO2 fluxes (FCO2) variability was low at SOMLIT-offshore and SOMLIT-pier, whereas SOMLIT-Brest occasionally switched to weak annual sinks of atmospheric CO2, driven by enhanced spring NEP compared to annual means. Over the 2008–2018 period, monthly total alkalinity (TA) and DIC anomalies were characterized by significant positive trends (p-values < 0.001), from 0.49 ± 0.20 to 2.21 ± 0.39 μmol kg−1 year−1 for TA, and from 1.93 ± 0.28 to 2.98 ± 0.39 μmol kg–1 year–1 for DIC. These trends were associated with significant increases of calculated seawater pCO2, ranging from +2.95 ± 1.04 to 3.52 ± 0.47 μatm year–1, and strong reductions of calculated pHin situ, with a mean pHin situ decrease of 0.0028 year–1. This ocean acidification (OA) was driven by atmospheric CO2 forcing (57–66%), Sea surface temperature (SST) increase (31–37%), and changes in salinity (2–5%). Additional pHin situ data extended these observed trends to the 2008–2020 period and indicated an acceleration of OA, reflected by a mean pHin situ decrease of 0.0046 year–1 in the sWEC for ... Article in Journal/Newspaper North East Atlantic Ocean acidification Université de Nantes: HAL-UNIV-NANTES Frontiers in Marine Science 8 |