Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF
Ocean Alkalinity Enhancement (OAE) simultaneously mitigates atmospheric concentrations of CO 2 and ocean acidification; however, no previous studies have investigated the response of the non-linear marine carbonate system sensitivity to alkalinity enhancement on regional scales. We hypothesise that...
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ftsmithonian:oai:figshare.com:article/14928981 2023-05-15T17:36:02+02:00 Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF Daniel J. Burt (11094249) Friederike Fröb (11094252) Tatiana Ilyina (2291788) 2021-07-08T04:40:40Z https://doi.org/10.3389/fclim.2021.624075.s001 unknown https://figshare.com/articles/dataset/Data_Sheet_1_The_Sensitivity_of_the_Marine_Carbonate_System_to_Regional_Ocean_Alkalinity_Enhancement_PDF/14928981 doi:10.3389/fclim.2021.624075.s001 CC BY 4.0 CC-BY Climate Science Climate Change Processes Climatology (excl. Climate Change Processes) Carbon Sequestration Science climate change mitigation carbon cycle ocean alkalinity enhancement biogeochemical modelling alkalinity sensitivity carbonate system Dataset 2021 ftsmithonian https://doi.org/10.3389/fclim.2021.624075.s001 2021-07-25T17:40:43Z Ocean Alkalinity Enhancement (OAE) simultaneously mitigates atmospheric concentrations of CO 2 and ocean acidification; however, no previous studies have investigated the response of the non-linear marine carbonate system sensitivity to alkalinity enhancement on regional scales. We hypothesise that regional implementations of OAE can sequester more atmospheric CO 2 than a global implementation. To address this, we investigate physical regimes and alkalinity sensitivity as drivers of the carbon-uptake potential response to global and different regional simulations of OAE. In this idealised ocean-only set-up, total alkalinity is enhanced at a rate of 0.25 Pmol a -1 in 75-year simulations using the Max Planck Institute Ocean Model coupled to the HAMburg Ocean Carbon Cycle model with pre-industrial atmospheric forcing. Alkalinity is enhanced globally and in eight regions: the Subpolar and Subtropical Atlantic and Pacific gyres, the Indian Ocean and the Southern Ocean. This study reveals that regional alkalinity enhancement has the capacity to exceed carbon uptake by global OAE. We find that 82–175 Pg more carbon is sequestered into the ocean when alkalinity is enhanced regionally and 156 PgC when enhanced globally, compared with the background-state. The Southern Ocean application is most efficient, sequestering 12% more carbon than the Global experiment despite OAE being applied across a surface area 40 times smaller. For the first time, we find that different carbon-uptake potentials are driven by the surface pattern of total alkalinity redistributed by physical regimes across areas of different carbon-uptake efficiencies. We also show that, while the marine carbonate system becomes less sensitive to alkalinity enhancement in all experiments globally, regional responses to enhanced alkalinity vary depending upon the background concentrations of dissolved inorganic carbon and total alkalinity. Furthermore, the Subpolar North Atlantic displays a previously unexpected alkalinity sensitivity increase in response to high total alkalinity concentrations. Dataset North Atlantic Ocean acidification Southern Ocean Unknown Southern Ocean Pacific Indian |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftsmithonian |
language |
unknown |
topic |
Climate Science Climate Change Processes Climatology (excl. Climate Change Processes) Carbon Sequestration Science climate change mitigation carbon cycle ocean alkalinity enhancement biogeochemical modelling alkalinity sensitivity carbonate system |
spellingShingle |
Climate Science Climate Change Processes Climatology (excl. Climate Change Processes) Carbon Sequestration Science climate change mitigation carbon cycle ocean alkalinity enhancement biogeochemical modelling alkalinity sensitivity carbonate system Daniel J. Burt (11094249) Friederike Fröb (11094252) Tatiana Ilyina (2291788) Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF |
topic_facet |
Climate Science Climate Change Processes Climatology (excl. Climate Change Processes) Carbon Sequestration Science climate change mitigation carbon cycle ocean alkalinity enhancement biogeochemical modelling alkalinity sensitivity carbonate system |
description |
Ocean Alkalinity Enhancement (OAE) simultaneously mitigates atmospheric concentrations of CO 2 and ocean acidification; however, no previous studies have investigated the response of the non-linear marine carbonate system sensitivity to alkalinity enhancement on regional scales. We hypothesise that regional implementations of OAE can sequester more atmospheric CO 2 than a global implementation. To address this, we investigate physical regimes and alkalinity sensitivity as drivers of the carbon-uptake potential response to global and different regional simulations of OAE. In this idealised ocean-only set-up, total alkalinity is enhanced at a rate of 0.25 Pmol a -1 in 75-year simulations using the Max Planck Institute Ocean Model coupled to the HAMburg Ocean Carbon Cycle model with pre-industrial atmospheric forcing. Alkalinity is enhanced globally and in eight regions: the Subpolar and Subtropical Atlantic and Pacific gyres, the Indian Ocean and the Southern Ocean. This study reveals that regional alkalinity enhancement has the capacity to exceed carbon uptake by global OAE. We find that 82–175 Pg more carbon is sequestered into the ocean when alkalinity is enhanced regionally and 156 PgC when enhanced globally, compared with the background-state. The Southern Ocean application is most efficient, sequestering 12% more carbon than the Global experiment despite OAE being applied across a surface area 40 times smaller. For the first time, we find that different carbon-uptake potentials are driven by the surface pattern of total alkalinity redistributed by physical regimes across areas of different carbon-uptake efficiencies. We also show that, while the marine carbonate system becomes less sensitive to alkalinity enhancement in all experiments globally, regional responses to enhanced alkalinity vary depending upon the background concentrations of dissolved inorganic carbon and total alkalinity. Furthermore, the Subpolar North Atlantic displays a previously unexpected alkalinity sensitivity increase in response to high total alkalinity concentrations. |
format |
Dataset |
author |
Daniel J. Burt (11094249) Friederike Fröb (11094252) Tatiana Ilyina (2291788) |
author_facet |
Daniel J. Burt (11094249) Friederike Fröb (11094252) Tatiana Ilyina (2291788) |
author_sort |
Daniel J. Burt (11094249) |
title |
Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF |
title_short |
Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF |
title_full |
Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF |
title_fullStr |
Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF |
title_full_unstemmed |
Data_Sheet_1_The Sensitivity of the Marine Carbonate System to Regional Ocean Alkalinity Enhancement.PDF |
title_sort |
data_sheet_1_the sensitivity of the marine carbonate system to regional ocean alkalinity enhancement.pdf |
publishDate |
2021 |
url |
https://doi.org/10.3389/fclim.2021.624075.s001 |
geographic |
Southern Ocean Pacific Indian |
geographic_facet |
Southern Ocean Pacific Indian |
genre |
North Atlantic Ocean acidification Southern Ocean |
genre_facet |
North Atlantic Ocean acidification Southern Ocean |
op_relation |
https://figshare.com/articles/dataset/Data_Sheet_1_The_Sensitivity_of_the_Marine_Carbonate_System_to_Regional_Ocean_Alkalinity_Enhancement_PDF/14928981 doi:10.3389/fclim.2021.624075.s001 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fclim.2021.624075.s001 |
_version_ |
1766135378369052672 |