Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal
International audience In combination with drastic emission reduction cuts, limiting global warming below 1.5 °C or 2 °C requires atmospheric carbon dioxide removal (CDR) of up to 16 GtCO 2 yr -1 by 2050. Among CDR solutions, ocean afforestation through macroalgae cultivation is considered promising...
Published in: | Environmental Research Letters |
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Main Authors: | , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Subjects: | |
Online Access: | https://insu.hal.science/insu-03993948 https://insu.hal.science/insu-03993948/document https://insu.hal.science/insu-03993948/file/Berger_2023_Environ._Res._Lett._18_024039.pdf https://doi.org/10.1088/1748-9326/acb06e |
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ftuniversailles:oai:HAL:insu-03993948v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
carbon dioxide removal CDR macroalgae cultivation air-sea equilibrium seaweed kelp MRV [SDU]Sciences of the Universe [physics] |
spellingShingle |
carbon dioxide removal CDR macroalgae cultivation air-sea equilibrium seaweed kelp MRV [SDU]Sciences of the Universe [physics] Berger, Manon Kwiatkowski, Lester Ho, David T. Bopp, Laurent Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
topic_facet |
carbon dioxide removal CDR macroalgae cultivation air-sea equilibrium seaweed kelp MRV [SDU]Sciences of the Universe [physics] |
description |
International audience In combination with drastic emission reduction cuts, limiting global warming below 1.5 °C or 2 °C requires atmospheric carbon dioxide removal (CDR) of up to 16 GtCO 2 yr -1 by 2050. Among CDR solutions, ocean afforestation through macroalgae cultivation is considered promising due to high rates of productivity and environmental co-benefits. We modify a high-resolution ocean biogeochemical model to simulate the consumption of dissolved inorganic carbon and macronutrients by idealised macroalgal cultivation in Exclusive Economic Zones. Under imposed macroalgal production of 0.5 PgC yr -1 with no nutrient feedbacks, physicochemical processes are found to limit the enhancement in the ocean carbon sink to 0.39 PgC yr -1 (1.43 GtCO 2 yr -1 ), corresponding to CDR efficiency of 79%. Only 0.22 PgC yr -1 (56%) of this air-sea carbon flux occurs in the regions of macroalgae cultivation, posing potential issues for measurement, reporting, and verification. When additional macronutrient limitations and feedbacks are simulated, the realised macroalgal production rate drops to 0.37 PgC yr -1 and the enhancement in the air-sea carbon flux to 0.21 PgC yr -1 (0.79 GtCO yr -1 ), or 58% of the macroalgal net production. This decrease in CDR efficiency is a consequence of a deepening in the optimum depth of macroalgal production and a reduction in phytoplankton production due to reduced nitrate and phosphate availability. At regional scales, the decrease of phytoplankton productivity can even cause a net reduction in the oceanic carbon sink. Although additional modelling efforts are required, Eastern boundary upwelling systems and regions of the Northeast Pacific and the Southern Ocean are revealed as potentially promising locations for efficient macroalgae-based CDR. Despite the CDR potential of ocean afforestation, our simulations indicate potential negative impacts on marine food webs with reductions in phytoplankton primary production of up to -40 gC m -2 yr -1 in the eastern tropical Pacific. |
author2 |
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 École normale supérieure - Paris (ENS-PSL) 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) Nucleus for European Modeling of the Ocean (NEMO R&D ) 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)) 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) Department of Oceanography Halifax (DO) Dalhousie University Halifax European Project: 821003,CCiCC European Project: 820989,H2020-EU.3.5.1.,COMFORT(2019) |
format |
Article in Journal/Newspaper |
author |
Berger, Manon Kwiatkowski, Lester Ho, David T. Bopp, Laurent |
author_facet |
Berger, Manon Kwiatkowski, Lester Ho, David T. Bopp, Laurent |
author_sort |
Berger, Manon |
title |
Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
title_short |
Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
title_full |
Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
title_fullStr |
Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
title_full_unstemmed |
Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
title_sort |
ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-03993948 https://insu.hal.science/insu-03993948/document https://insu.hal.science/insu-03993948/file/Berger_2023_Environ._Res._Lett._18_024039.pdf https://doi.org/10.1088/1748-9326/acb06e |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1748-9326 Environmental Research Letters https://insu.hal.science/insu-03993948 Environmental Research Letters, 2023, 18, ⟨10.1088/1748-9326/acb06e⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-9326/acb06e info:eu-repo/grantAgreement//821003/EU/Climate-Carbon Interactions in the Current Century/CCiCC info:eu-repo/grantAgreement//820989/EU/Our common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points/COMFORT insu-03993948 https://insu.hal.science/insu-03993948 https://insu.hal.science/insu-03993948/document https://insu.hal.science/insu-03993948/file/Berger_2023_Environ._Res._Lett._18_024039.pdf BIBCODE: 2023ERL.18b4039B doi:10.1088/1748-9326/acb06e WOS: 000926300400001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1088/1748-9326/acb06e |
container_title |
Environmental Research Letters |
container_volume |
18 |
container_issue |
2 |
container_start_page |
024039 |
_version_ |
1799467412308885504 |
spelling |
ftuniversailles:oai:HAL:insu-03993948v1 2024-05-19T07:49:00+00:00 Ocean dynamics and biological feedbacks limit the potential of macroalgae carbon dioxide removal Berger, Manon Kwiatkowski, Lester Ho, David T. Bopp, Laurent 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 École normale supérieure - Paris (ENS-PSL) 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) Nucleus for European Modeling of the Ocean (NEMO R&D ) 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)) 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) Department of Oceanography Halifax (DO) Dalhousie University Halifax European Project: 821003,CCiCC European Project: 820989,H2020-EU.3.5.1.,COMFORT(2019) 2023 https://insu.hal.science/insu-03993948 https://insu.hal.science/insu-03993948/document https://insu.hal.science/insu-03993948/file/Berger_2023_Environ._Res._Lett._18_024039.pdf https://doi.org/10.1088/1748-9326/acb06e en eng HAL CCSD IOP Publishing info:eu-repo/semantics/altIdentifier/doi/10.1088/1748-9326/acb06e info:eu-repo/grantAgreement//821003/EU/Climate-Carbon Interactions in the Current Century/CCiCC info:eu-repo/grantAgreement//820989/EU/Our common future ocean in the Earth system – quantifying coupled cycles of carbon, oxygen, and nutrients for determining and achieving safe operating spaces with respect to tipping points/COMFORT insu-03993948 https://insu.hal.science/insu-03993948 https://insu.hal.science/insu-03993948/document https://insu.hal.science/insu-03993948/file/Berger_2023_Environ._Res._Lett._18_024039.pdf BIBCODE: 2023ERL.18b4039B doi:10.1088/1748-9326/acb06e WOS: 000926300400001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1748-9326 Environmental Research Letters https://insu.hal.science/insu-03993948 Environmental Research Letters, 2023, 18, ⟨10.1088/1748-9326/acb06e⟩ carbon dioxide removal CDR macroalgae cultivation air-sea equilibrium seaweed kelp MRV [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftuniversailles https://doi.org/10.1088/1748-9326/acb06e 2024-04-25T00:19:42Z International audience In combination with drastic emission reduction cuts, limiting global warming below 1.5 °C or 2 °C requires atmospheric carbon dioxide removal (CDR) of up to 16 GtCO 2 yr -1 by 2050. Among CDR solutions, ocean afforestation through macroalgae cultivation is considered promising due to high rates of productivity and environmental co-benefits. We modify a high-resolution ocean biogeochemical model to simulate the consumption of dissolved inorganic carbon and macronutrients by idealised macroalgal cultivation in Exclusive Economic Zones. Under imposed macroalgal production of 0.5 PgC yr -1 with no nutrient feedbacks, physicochemical processes are found to limit the enhancement in the ocean carbon sink to 0.39 PgC yr -1 (1.43 GtCO 2 yr -1 ), corresponding to CDR efficiency of 79%. Only 0.22 PgC yr -1 (56%) of this air-sea carbon flux occurs in the regions of macroalgae cultivation, posing potential issues for measurement, reporting, and verification. When additional macronutrient limitations and feedbacks are simulated, the realised macroalgal production rate drops to 0.37 PgC yr -1 and the enhancement in the air-sea carbon flux to 0.21 PgC yr -1 (0.79 GtCO yr -1 ), or 58% of the macroalgal net production. This decrease in CDR efficiency is a consequence of a deepening in the optimum depth of macroalgal production and a reduction in phytoplankton production due to reduced nitrate and phosphate availability. At regional scales, the decrease of phytoplankton productivity can even cause a net reduction in the oceanic carbon sink. Although additional modelling efforts are required, Eastern boundary upwelling systems and regions of the Northeast Pacific and the Southern Ocean are revealed as potentially promising locations for efficient macroalgae-based CDR. Despite the CDR potential of ocean afforestation, our simulations indicate potential negative impacts on marine food webs with reductions in phytoplankton primary production of up to -40 gC m -2 yr -1 in the eastern tropical Pacific. Article in Journal/Newspaper Southern Ocean Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Environmental Research Letters 18 2 024039 |