Processes Driving Global Interior Ocean pH Distribution
Ocean acidification evolves on the background of a natural ocean pH gradient that is the result of the interplay between ocean mixing, biological production and remineralization, calcium carbonate cycling, and temperature and pressure changes across the water column. While previous studies have anal...
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Online Access: | https://hdl.handle.net/11250/2758228 https://doi.org/10.1029/2019GB006229 |
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ftunivbergen:oai:bora.uib.no:11250/2758228 2023-05-15T17:50:00+02:00 Processes Driving Global Interior Ocean pH Distribution Lauvset, Siv Kari Carter, B.R. Pérez, Fiz F. Jiang, L.-Q. Feely, Richard A. Velo, Antón Olsen, Are 2020 application/pdf https://hdl.handle.net/11250/2758228 https://doi.org/10.1029/2019GB006229 eng eng Wiley EC/H2020/633211 urn:issn:0886-6236 https://hdl.handle.net/11250/2758228 https://doi.org/10.1029/2019GB006229 cristin:1843365 Global Biogeochemical Cycles. 2020, 34 (1), e2019GB006229. Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020. The Authors. e2019GB006229 Global Biogeochemical Cycles 34 1 Journal article Peer reviewed 2020 ftunivbergen https://doi.org/10.1029/2019GB006229 2023-03-14T17:40:39Z Ocean acidification evolves on the background of a natural ocean pH gradient that is the result of the interplay between ocean mixing, biological production and remineralization, calcium carbonate cycling, and temperature and pressure changes across the water column. While previous studies have analyzed these processes and their impacts on ocean carbonate chemistry, none have attempted to quantify their impacts on interior ocean pH globally. Here we evaluate how anthropogenic changes and natural processes collectively act on ocean pH, and how these processes set the vulnerability of regions to future changes in ocean acidification. We use the mapped data product from the Global Ocean Data Analysis Project version 2, a novel method to estimate preformed total alkalinity based on a combination of a total matrix intercomparison and locally interpolated regressions, and a comprehensive uncertainty analysis. We find that the largest contribution to the interior ocean pH gradient comes from organic matter remineralization, with CaCO3 cycling being the second most important process. The estimates of the impact of anthropogenic CO2 changes on pH reaffirm the large and well-understood anthropogenic impact on pH in the surface ocean, and put it in the context of the natural pH gradient in the interior ocean. We also show that in the depth layer 500–1,500 m natural processes enhance ocean acidification by on average 28 ± 15%, but with large regional gradients. publishedVersion Article in Journal/Newspaper Ocean acidification University of Bergen: Bergen Open Research Archive (BORA-UiB) Global Biogeochemical Cycles 34 1 |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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language |
English |
description |
Ocean acidification evolves on the background of a natural ocean pH gradient that is the result of the interplay between ocean mixing, biological production and remineralization, calcium carbonate cycling, and temperature and pressure changes across the water column. While previous studies have analyzed these processes and their impacts on ocean carbonate chemistry, none have attempted to quantify their impacts on interior ocean pH globally. Here we evaluate how anthropogenic changes and natural processes collectively act on ocean pH, and how these processes set the vulnerability of regions to future changes in ocean acidification. We use the mapped data product from the Global Ocean Data Analysis Project version 2, a novel method to estimate preformed total alkalinity based on a combination of a total matrix intercomparison and locally interpolated regressions, and a comprehensive uncertainty analysis. We find that the largest contribution to the interior ocean pH gradient comes from organic matter remineralization, with CaCO3 cycling being the second most important process. The estimates of the impact of anthropogenic CO2 changes on pH reaffirm the large and well-understood anthropogenic impact on pH in the surface ocean, and put it in the context of the natural pH gradient in the interior ocean. We also show that in the depth layer 500–1,500 m natural processes enhance ocean acidification by on average 28 ± 15%, but with large regional gradients. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Lauvset, Siv Kari Carter, B.R. Pérez, Fiz F. Jiang, L.-Q. Feely, Richard A. Velo, Antón Olsen, Are |
spellingShingle |
Lauvset, Siv Kari Carter, B.R. Pérez, Fiz F. Jiang, L.-Q. Feely, Richard A. Velo, Antón Olsen, Are Processes Driving Global Interior Ocean pH Distribution |
author_facet |
Lauvset, Siv Kari Carter, B.R. Pérez, Fiz F. Jiang, L.-Q. Feely, Richard A. Velo, Antón Olsen, Are |
author_sort |
Lauvset, Siv Kari |
title |
Processes Driving Global Interior Ocean pH Distribution |
title_short |
Processes Driving Global Interior Ocean pH Distribution |
title_full |
Processes Driving Global Interior Ocean pH Distribution |
title_fullStr |
Processes Driving Global Interior Ocean pH Distribution |
title_full_unstemmed |
Processes Driving Global Interior Ocean pH Distribution |
title_sort |
processes driving global interior ocean ph distribution |
publisher |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2758228 https://doi.org/10.1029/2019GB006229 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
e2019GB006229 Global Biogeochemical Cycles 34 1 |
op_relation |
EC/H2020/633211 urn:issn:0886-6236 https://hdl.handle.net/11250/2758228 https://doi.org/10.1029/2019GB006229 cristin:1843365 Global Biogeochemical Cycles. 2020, 34 (1), e2019GB006229. |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no Copyright 2020. The Authors. |
op_doi |
https://doi.org/10.1029/2019GB006229 |
container_title |
Global Biogeochemical Cycles |
container_volume |
34 |
container_issue |
1 |
_version_ |
1766156567455989760 |