Carbon-climate feedbacks accelerate ocean acidification
Carbon-climate feedbacks have the potential to significantly impact the future climate by altering atmospheric CO2 concentrations (Zaehle et al., 2010). By modifying the future atmospheric CO2 concentrations, the carbon-climate feedbacks will also influence the future ocean acidification trajectory....
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ftarchimer:oai:archimer.ifremer.fr:78493 2023-05-15T15:12:37+02:00 Carbon-climate feedbacks accelerate ocean acidification Matear, Richard J. Lenton, Andrew 2018-03 application/pdf https://archimer.ifremer.fr/doc/00673/78493/80815.pdf https://archimer.ifremer.fr/doc/00673/78493/80816.pdf https://doi.org/10.5194/bg-15-1721-2018 https://archimer.ifremer.fr/doc/00673/78493/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00673/78493/80815.pdf https://archimer.ifremer.fr/doc/00673/78493/80816.pdf doi:10.5194/bg-15-1721-2018 https://archimer.ifremer.fr/doc/00673/78493/ info:eu-repo/semantics/openAccess restricted use Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2018-03 , Vol. 15 , N. 6 , P. 1721-1732 text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.5194/bg-15-1721-2018 2021-09-23T20:36:48Z Carbon-climate feedbacks have the potential to significantly impact the future climate by altering atmospheric CO2 concentrations (Zaehle et al., 2010). By modifying the future atmospheric CO2 concentrations, the carbon-climate feedbacks will also influence the future ocean acidification trajectory. Here, we use the CO2 emissions scenarios from four representative concentration pathways (RCPs) with an Earth system model to project the future trajectories of ocean acidification with the inclusion of carbon-climate feedbacks. We show that simulated carbon-climate feedbacks can significantly impact the onset of undersaturated aragonite conditions in the Southern and Arctic oceans, the suitable habitat for tropical coral and the deepwater saturation states. Under the high-emissions scenarios (RCP8.5 and RCP6), the carbon-climate feedbacks advance the onset of surface water under saturation and the decline in suitable coral reef habitat by a decade or more. The impacts of the carbon-climate feedbacks are most significant for the medium-(RCP4.5) and low-emissions (RCP2.6) scenarios. For the RCP4.5 scenario, by 2100 the carbon-climate feedbacks nearly double the area of surface water undersaturated with respect to aragonite and reduce by 50% the surface water suitable for coral reefs. For the RCP2.6 scenario, by 2100 the carbon-climate feedbacks reduce the area suitable for coral reefs by 40% and increase the area of undersaturated surface water by 20 %. The sensitivity of ocean acidification to the carbon-climate feedbacks in the low to medium emission scenarios is important because recent CO2 emission reduction commitments are trying to transition emissions to such a scenario. Our study highlights the need to better characterise the carbon-climate feedbacks and ensure we do not underestimate the projected ocean acidification. Article in Journal/Newspaper Arctic Ocean acidification Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Biogeosciences 15 6 1721 1732 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
Carbon-climate feedbacks have the potential to significantly impact the future climate by altering atmospheric CO2 concentrations (Zaehle et al., 2010). By modifying the future atmospheric CO2 concentrations, the carbon-climate feedbacks will also influence the future ocean acidification trajectory. Here, we use the CO2 emissions scenarios from four representative concentration pathways (RCPs) with an Earth system model to project the future trajectories of ocean acidification with the inclusion of carbon-climate feedbacks. We show that simulated carbon-climate feedbacks can significantly impact the onset of undersaturated aragonite conditions in the Southern and Arctic oceans, the suitable habitat for tropical coral and the deepwater saturation states. Under the high-emissions scenarios (RCP8.5 and RCP6), the carbon-climate feedbacks advance the onset of surface water under saturation and the decline in suitable coral reef habitat by a decade or more. The impacts of the carbon-climate feedbacks are most significant for the medium-(RCP4.5) and low-emissions (RCP2.6) scenarios. For the RCP4.5 scenario, by 2100 the carbon-climate feedbacks nearly double the area of surface water undersaturated with respect to aragonite and reduce by 50% the surface water suitable for coral reefs. For the RCP2.6 scenario, by 2100 the carbon-climate feedbacks reduce the area suitable for coral reefs by 40% and increase the area of undersaturated surface water by 20 %. The sensitivity of ocean acidification to the carbon-climate feedbacks in the low to medium emission scenarios is important because recent CO2 emission reduction commitments are trying to transition emissions to such a scenario. Our study highlights the need to better characterise the carbon-climate feedbacks and ensure we do not underestimate the projected ocean acidification. |
format |
Article in Journal/Newspaper |
author |
Matear, Richard J. Lenton, Andrew |
spellingShingle |
Matear, Richard J. Lenton, Andrew Carbon-climate feedbacks accelerate ocean acidification |
author_facet |
Matear, Richard J. Lenton, Andrew |
author_sort |
Matear, Richard J. |
title |
Carbon-climate feedbacks accelerate ocean acidification |
title_short |
Carbon-climate feedbacks accelerate ocean acidification |
title_full |
Carbon-climate feedbacks accelerate ocean acidification |
title_fullStr |
Carbon-climate feedbacks accelerate ocean acidification |
title_full_unstemmed |
Carbon-climate feedbacks accelerate ocean acidification |
title_sort |
carbon-climate feedbacks accelerate ocean acidification |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00673/78493/80815.pdf https://archimer.ifremer.fr/doc/00673/78493/80816.pdf https://doi.org/10.5194/bg-15-1721-2018 https://archimer.ifremer.fr/doc/00673/78493/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ocean acidification |
genre_facet |
Arctic Ocean acidification |
op_source |
Biogeosciences (1726-4170) (Copernicus Gesellschaft Mbh), 2018-03 , Vol. 15 , N. 6 , P. 1721-1732 |
op_relation |
https://archimer.ifremer.fr/doc/00673/78493/80815.pdf https://archimer.ifremer.fr/doc/00673/78493/80816.pdf doi:10.5194/bg-15-1721-2018 https://archimer.ifremer.fr/doc/00673/78493/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.5194/bg-15-1721-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
6 |
container_start_page |
1721 |
op_container_end_page |
1732 |
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1766343274133454848 |