Generalised expressions for the response of pH to changes in ocean chemistry
The extent to which oceans are capable of buffering chemical changes resulting from the uptake of carbon dioxide (CO2) or other acidifying processes can be quantified using buffer factors. Here, we present general expressions describing the sensitivity of pH and concentrations of CO2 and other acid-...
Published in: | Geochimica et Cosmochimica Acta |
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ftunivwagenin:oai:library.wur.nl:wurpubs/596097 2024-01-14T10:09:37+01:00 Generalised expressions for the response of pH to changes in ocean chemistry Hagens, Mathilde Middelburg, Jack J. 2016 text/html https://research.wur.nl/en/publications/generalised-expressions-for-the-response-of-ph-to-changes-in-ocea https://doi.org/10.1016/j.gca.2016.04.012 en eng https://edepot.wur.nl/567829 https://research.wur.nl/en/publications/generalised-expressions-for-the-response-of-ph-to-changes-in-ocea doi:10.1016/j.gca.2016.04.012 info:eu-repo/semantics/restrictedAccess Wageningen University & Research Geochimica et Cosmochimica Acta 187 (2016) ISSN: 0016-7037 Buffer factors Buffering capacity CO Ocean acidification PH Sensitivity info:eu-repo/semantics/article Article/Letter to editor info:eu-repo/semantics/publishedVersion 2016 ftunivwagenin https://doi.org/10.1016/j.gca.2016.04.012 2023-12-20T23:17:22Z The extent to which oceans are capable of buffering chemical changes resulting from the uptake of carbon dioxide (CO2) or other acidifying processes can be quantified using buffer factors. Here, we present general expressions describing the sensitivity of pH and concentrations of CO2 and other acid-base species to a change in ocean chemistry. These expressions can include as many acid-base systems as desirable, making them suitable for application to, e.g., upwelling regions or nutrient-rich coastal waters. We show that these expressions are fully consistent with previously derived expressions for the Revelle factor and other buffer factors, which only included the carbonate and borate acid-base systems, and provide more accurate values.We apply our general expressions to contemporary global ocean surface water and possible changes therein by the end of the 21st century. These results show that most sensitivities describing a change in pH are of greater magnitude in a warmer, high-CO2 ocean, indicating a decreased seawater buffering capacity. This trend is driven by the increase in CO2 and slightly moderated by the warming. Respiration-derived carbon dioxide may amplify or attenuate ocean acidification due to rising atmospheric CO2, depending on their relative importance. Our work highlights that, to gain further insight into current and future pH dynamics, it is crucial to properly quantify the various concurrently acting buffering mechanisms. Article in Journal/Newspaper Ocean acidification Wageningen UR (University & Research Centre): Digital Library Geochimica et Cosmochimica Acta 187 334 349 |
institution |
Open Polar |
collection |
Wageningen UR (University & Research Centre): Digital Library |
op_collection_id |
ftunivwagenin |
language |
English |
topic |
Buffer factors Buffering capacity CO Ocean acidification PH Sensitivity |
spellingShingle |
Buffer factors Buffering capacity CO Ocean acidification PH Sensitivity Hagens, Mathilde Middelburg, Jack J. Generalised expressions for the response of pH to changes in ocean chemistry |
topic_facet |
Buffer factors Buffering capacity CO Ocean acidification PH Sensitivity |
description |
The extent to which oceans are capable of buffering chemical changes resulting from the uptake of carbon dioxide (CO2) or other acidifying processes can be quantified using buffer factors. Here, we present general expressions describing the sensitivity of pH and concentrations of CO2 and other acid-base species to a change in ocean chemistry. These expressions can include as many acid-base systems as desirable, making them suitable for application to, e.g., upwelling regions or nutrient-rich coastal waters. We show that these expressions are fully consistent with previously derived expressions for the Revelle factor and other buffer factors, which only included the carbonate and borate acid-base systems, and provide more accurate values.We apply our general expressions to contemporary global ocean surface water and possible changes therein by the end of the 21st century. These results show that most sensitivities describing a change in pH are of greater magnitude in a warmer, high-CO2 ocean, indicating a decreased seawater buffering capacity. This trend is driven by the increase in CO2 and slightly moderated by the warming. Respiration-derived carbon dioxide may amplify or attenuate ocean acidification due to rising atmospheric CO2, depending on their relative importance. Our work highlights that, to gain further insight into current and future pH dynamics, it is crucial to properly quantify the various concurrently acting buffering mechanisms. |
format |
Article in Journal/Newspaper |
author |
Hagens, Mathilde Middelburg, Jack J. |
author_facet |
Hagens, Mathilde Middelburg, Jack J. |
author_sort |
Hagens, Mathilde |
title |
Generalised expressions for the response of pH to changes in ocean chemistry |
title_short |
Generalised expressions for the response of pH to changes in ocean chemistry |
title_full |
Generalised expressions for the response of pH to changes in ocean chemistry |
title_fullStr |
Generalised expressions for the response of pH to changes in ocean chemistry |
title_full_unstemmed |
Generalised expressions for the response of pH to changes in ocean chemistry |
title_sort |
generalised expressions for the response of ph to changes in ocean chemistry |
publishDate |
2016 |
url |
https://research.wur.nl/en/publications/generalised-expressions-for-the-response-of-ph-to-changes-in-ocea https://doi.org/10.1016/j.gca.2016.04.012 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Geochimica et Cosmochimica Acta 187 (2016) ISSN: 0016-7037 |
op_relation |
https://edepot.wur.nl/567829 https://research.wur.nl/en/publications/generalised-expressions-for-the-response-of-ph-to-changes-in-ocea doi:10.1016/j.gca.2016.04.012 |
op_rights |
info:eu-repo/semantics/restrictedAccess Wageningen University & Research |
op_doi |
https://doi.org/10.1016/j.gca.2016.04.012 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
187 |
container_start_page |
334 |
op_container_end_page |
349 |
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1788064157435691008 |