Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect)
International audience The western tropical South Pacific was sampled along a longitudinal 4000 km transect (OUTPACE cruise, 18 February, 3 April 2015) for the measurement of car-bonate parameters (total alkalinity and total inorganic carbon) between the Melanesian Archipelago (MA) and the western p...
Published in: | Biogeosciences |
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Main Authors: | , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal.science/hal-01868023 https://hal.science/hal-01868023/document https://hal.science/hal-01868023/file/bg-15-5221-2018.pdf https://doi.org/10.5194/bg-15-5221-2018 |
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ftuniversailles:oai:HAL:hal-01868023v1 |
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openpolar |
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Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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ftuniversailles |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Wagener, Thibaut Metzl, Nicolas Caffin, Mathieu Fin, Jonathan Helias Nunige, Sandra Lefèvre, Dominique Lo Monaco, Claire Rougier, Gilles Moutin, Thierry Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The western tropical South Pacific was sampled along a longitudinal 4000 km transect (OUTPACE cruise, 18 February, 3 April 2015) for the measurement of car-bonate parameters (total alkalinity and total inorganic carbon) between the Melanesian Archipelago (MA) and the western part of the South Pacific gyre (WGY). This paper reports this new dataset and derived properties: pH on the total scale (pH T ) and the CaCO 3 saturation state with respect to aragonite (Ω ara ). We also estimate anthro-pogenic carbon (C ANT ) distribution in the water column using the TrOCA method (Tracer combining Oxygen, inorganic Carbon and total Alkalinity). Along the OUTPACE transect a deeper penetration of C ANT in the intermediate waters was observed in the MA, whereas highest C ANT concentrations were detected in the subsurface waters of the WGY. By combining our OUTPACE dataset with data available in GLODAPv2 (1974–2009), temporal changes in oceanic inorganic carbon were evaluated. An increase of 1.3 to 1.6 µmol kg −1 a −1 for total inorganic carbon in the upper thermocline waters is estimated, whereas C ANT increases by 1.1 to 1.2 µmol kg −1 a −1 . In the MA intermediate waters (27 kg m −3 < σ θ < 27.2 kg m −3 ) an increase of 0.4 µmol kg −1 a −1 C ANT is detected. Our results suggest a clear progression of ocean acidification in the western tropical South Pacific with a decrease in the oceanic pH T of up to −0.0027 a −1 and a shoaling of the saturation depth for aragonite of up to 200 m since the pre-industrial period. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Cycles biogéochimiques marins : processus et perturbations (CYBIOM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Laboratoire d'océanographie et de biogéochimie (LOB) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) LEFE-CyBER program (CNRS-INSU)GOPS program (IRD) CNES (BC T23, ZBC 4500048836) OUTPACE (Oligotrophy from Ultra-oligoTrophy PACific Experiment) project ANR-14-CE01-0007,OUTPACE,Sequestration océanique du CO2 et fixation d'azote atmosphérique dans l'océan oligotrophe (campagne océanographique OUTPACE).(2014) |
format |
Article in Journal/Newspaper |
author |
Wagener, Thibaut Metzl, Nicolas Caffin, Mathieu Fin, Jonathan Helias Nunige, Sandra Lefèvre, Dominique Lo Monaco, Claire Rougier, Gilles Moutin, Thierry |
author_facet |
Wagener, Thibaut Metzl, Nicolas Caffin, Mathieu Fin, Jonathan Helias Nunige, Sandra Lefèvre, Dominique Lo Monaco, Claire Rougier, Gilles Moutin, Thierry |
author_sort |
Wagener, Thibaut |
title |
Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) |
title_short |
Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) |
title_full |
Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) |
title_fullStr |
Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) |
title_full_unstemmed |
Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) |
title_sort |
carbonate system distribution, anthropogenic carbon and acidification in the western tropical south pacific (outpace 2015 transect) |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01868023 https://hal.science/hal-01868023/document https://hal.science/hal-01868023/file/bg-15-5221-2018.pdf https://doi.org/10.5194/bg-15-5221-2018 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-01868023 Biogeosciences, 2018, 15 (16), pp.5221 - 5236. ⟨10.5194/bg-15-5221-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-5221-2018 hal-01868023 https://hal.science/hal-01868023 https://hal.science/hal-01868023/document https://hal.science/hal-01868023/file/bg-15-5221-2018.pdf doi:10.5194/bg-15-5221-2018 WOS: 000443077000004 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-15-5221-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
16 |
container_start_page |
5221 |
op_container_end_page |
5236 |
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1799486865236033536 |
spelling |
ftuniversailles:oai:HAL:hal-01868023v1 2024-05-19T07:46:38+00:00 Carbonate system distribution, anthropogenic carbon and acidification in the western tropical South Pacific (OUTPACE 2015 transect) Wagener, Thibaut Metzl, Nicolas Caffin, Mathieu Fin, Jonathan Helias Nunige, Sandra Lefèvre, Dominique Lo Monaco, Claire Rougier, Gilles Moutin, Thierry Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS) Cycles biogéochimiques marins : processus et perturbations (CYBIOM) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Laboratoire d'océanographie et de biogéochimie (LOB) Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) LEFE-CyBER program (CNRS-INSU)GOPS program (IRD) CNES (BC T23, ZBC 4500048836) OUTPACE (Oligotrophy from Ultra-oligoTrophy PACific Experiment) project ANR-14-CE01-0007,OUTPACE,Sequestration océanique du CO2 et fixation d'azote atmosphérique dans l'océan oligotrophe (campagne océanographique OUTPACE).(2014) 2018-08-29 https://hal.science/hal-01868023 https://hal.science/hal-01868023/document https://hal.science/hal-01868023/file/bg-15-5221-2018.pdf https://doi.org/10.5194/bg-15-5221-2018 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-15-5221-2018 hal-01868023 https://hal.science/hal-01868023 https://hal.science/hal-01868023/document https://hal.science/hal-01868023/file/bg-15-5221-2018.pdf doi:10.5194/bg-15-5221-2018 WOS: 000443077000004 info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-01868023 Biogeosciences, 2018, 15 (16), pp.5221 - 5236. ⟨10.5194/bg-15-5221-2018⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2018 ftuniversailles https://doi.org/10.5194/bg-15-5221-2018 2024-04-25T00:33:36Z International audience The western tropical South Pacific was sampled along a longitudinal 4000 km transect (OUTPACE cruise, 18 February, 3 April 2015) for the measurement of car-bonate parameters (total alkalinity and total inorganic carbon) between the Melanesian Archipelago (MA) and the western part of the South Pacific gyre (WGY). This paper reports this new dataset and derived properties: pH on the total scale (pH T ) and the CaCO 3 saturation state with respect to aragonite (Ω ara ). We also estimate anthro-pogenic carbon (C ANT ) distribution in the water column using the TrOCA method (Tracer combining Oxygen, inorganic Carbon and total Alkalinity). Along the OUTPACE transect a deeper penetration of C ANT in the intermediate waters was observed in the MA, whereas highest C ANT concentrations were detected in the subsurface waters of the WGY. By combining our OUTPACE dataset with data available in GLODAPv2 (1974–2009), temporal changes in oceanic inorganic carbon were evaluated. An increase of 1.3 to 1.6 µmol kg −1 a −1 for total inorganic carbon in the upper thermocline waters is estimated, whereas C ANT increases by 1.1 to 1.2 µmol kg −1 a −1 . In the MA intermediate waters (27 kg m −3 < σ θ < 27.2 kg m −3 ) an increase of 0.4 µmol kg −1 a −1 C ANT is detected. Our results suggest a clear progression of ocean acidification in the western tropical South Pacific with a decrease in the oceanic pH T of up to −0.0027 a −1 and a shoaling of the saturation depth for aragonite of up to 200 m since the pre-industrial period. Article in Journal/Newspaper Ocean acidification Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Biogeosciences 15 16 5221 5236 |