Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery
International audience The Arctic Ocean, more than any other ocean, is influenced by riverine input of carbon and nutrients. That riverine delivery is likely to change with climate change as runoff increases, permafrost thaws, and tree lines advance. But it is unknown to what extent these changes in...
Published in: | Global Biogeochemical Cycles |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.science/hal-02974125 https://hal.science/hal-02974125/document https://hal.science/hal-02974125/file/2019GB006200.pdf https://doi.org/10.1029/2019GB006200 |
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English |
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[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Terhaar, Jens Orr, J.C. Ethé, C. Regnier, P. Bopp, L Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The Arctic Ocean, more than any other ocean, is influenced by riverine input of carbon and nutrients. That riverine delivery is likely to change with climate change as runoff increases, permafrost thaws, and tree lines advance. But it is unknown to what extent these changes in riverine delivery will affect Arctic Ocean primary production, air-to-sea CO 2 fluxes, and acidification. To test their sensitivity to changing riverine delivery, we made sensitivity tests using an ocean circulation model coupled to an ocean biogeochemical model. In separate idealized simulations, riverine inputs of dissolved inorganic carbon (C T), dissolved organic carbon (DOC), and nutrients were increased by 1%/year until doubling. Doubling riverine nutrient delivery increased primary production by 11% on average across the Arctic basin and by up to 34-35% locally. Doubling riverine DOC delivery resulted in 90% of that added carbon being lost to the atmosphere, partly because it was imposed that once delivered to the ocean, the riverine DOC is instantaneously remineralized to C T. That additional outgassing, when considered alone, reduced the net ingassing of natural CO 2 into the Arctic Ocean by 25% while converting the Siberian shelf seas and the Beaufort Sea from net sinks to net sources of carbon to the atmosphere. The remaining 10% of DOC remained in the Arctic Ocean, but having been converted to C T , it enhanced acidification. Conversely, doubling riverine C T increased the Arctic Ocean's average surface pH by 0.02 because riverine total alkalinity delivery increased at the same rate as riverine C T delivery. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Université libre de Bruxelles (ULB) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 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) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) ANR-16-CE01-0014,SOBUMS,Comprendre la réponse du cycle du carbone dans l'océan austral au stress climatique(2016) |
format |
Article in Journal/Newspaper |
author |
Terhaar, Jens Orr, J.C. Ethé, C. Regnier, P. Bopp, L |
author_facet |
Terhaar, Jens Orr, J.C. Ethé, C. Regnier, P. Bopp, L |
author_sort |
Terhaar, Jens |
title |
Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery |
title_short |
Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery |
title_full |
Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery |
title_fullStr |
Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery |
title_full_unstemmed |
Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery |
title_sort |
simulated arctic ocean response to doubling of riverine carbon and nutrient delivery |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02974125 https://hal.science/hal-02974125/document https://hal.science/hal-02974125/file/2019GB006200.pdf https://doi.org/10.1029/2019GB006200 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Basin Arctic Arctic Ocean Beaufort Sea Climate change permafrost |
genre_facet |
Arctic Basin Arctic Arctic Ocean Beaufort Sea Climate change permafrost |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-02974125 Global Biogeochemical Cycles, 2019, 33 (8), pp.1048-1070. ⟨10.1029/2019GB006200⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GB006200 hal-02974125 https://hal.science/hal-02974125 https://hal.science/hal-02974125/document https://hal.science/hal-02974125/file/2019GB006200.pdf doi:10.1029/2019GB006200 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019GB006200 |
container_title |
Global Biogeochemical Cycles |
container_volume |
33 |
container_issue |
8 |
container_start_page |
1048 |
op_container_end_page |
1070 |
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1802003073092026368 |
spelling |
ftuniparissaclay:oai:HAL:hal-02974125v1 2024-06-16T07:36:34+00:00 Simulated Arctic Ocean Response to Doubling of Riverine Carbon and Nutrient Delivery Terhaar, Jens Orr, J.C. Ethé, C. Regnier, P. Bopp, L Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Université libre de Bruxelles (ULB) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) 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) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) ANR-16-CE01-0014,SOBUMS,Comprendre la réponse du cycle du carbone dans l'océan austral au stress climatique(2016) 2019-08-21 https://hal.science/hal-02974125 https://hal.science/hal-02974125/document https://hal.science/hal-02974125/file/2019GB006200.pdf https://doi.org/10.1029/2019GB006200 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GB006200 hal-02974125 https://hal.science/hal-02974125 https://hal.science/hal-02974125/document https://hal.science/hal-02974125/file/2019GB006200.pdf doi:10.1029/2019GB006200 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.science/hal-02974125 Global Biogeochemical Cycles, 2019, 33 (8), pp.1048-1070. ⟨10.1029/2019GB006200⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2019 ftuniparissaclay https://doi.org/10.1029/2019GB006200 2024-05-17T00:07:06Z International audience The Arctic Ocean, more than any other ocean, is influenced by riverine input of carbon and nutrients. That riverine delivery is likely to change with climate change as runoff increases, permafrost thaws, and tree lines advance. But it is unknown to what extent these changes in riverine delivery will affect Arctic Ocean primary production, air-to-sea CO 2 fluxes, and acidification. To test their sensitivity to changing riverine delivery, we made sensitivity tests using an ocean circulation model coupled to an ocean biogeochemical model. In separate idealized simulations, riverine inputs of dissolved inorganic carbon (C T), dissolved organic carbon (DOC), and nutrients were increased by 1%/year until doubling. Doubling riverine nutrient delivery increased primary production by 11% on average across the Arctic basin and by up to 34-35% locally. Doubling riverine DOC delivery resulted in 90% of that added carbon being lost to the atmosphere, partly because it was imposed that once delivered to the ocean, the riverine DOC is instantaneously remineralized to C T. That additional outgassing, when considered alone, reduced the net ingassing of natural CO 2 into the Arctic Ocean by 25% while converting the Siberian shelf seas and the Beaufort Sea from net sinks to net sources of carbon to the atmosphere. The remaining 10% of DOC remained in the Arctic Ocean, but having been converted to C T , it enhanced acidification. Conversely, doubling riverine C T increased the Arctic Ocean's average surface pH by 0.02 because riverine total alkalinity delivery increased at the same rate as riverine C T delivery. Article in Journal/Newspaper Arctic Basin Arctic Arctic Ocean Beaufort Sea Climate change permafrost Archives ouvertes de Paris-Saclay Arctic Arctic Ocean Global Biogeochemical Cycles 33 8 1048 1070 |