Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight
Abstract The California Current System experiences seasonal ocean acidification and hypoxia (OAH) owing to wind-driven upwelling, but little is known about the intensity, frequency, and depth distribution of OAH in the shallow nearshore environment. Here we present observations of OAH and dissolved...
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ftdoajarticles:oai:doaj.org/article:15069afcc4c04db5a3d78111471f7443 2023-05-15T17:50:09+02:00 Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight Samuel A. H. Kekuewa Travis A. Courtney Tyler Cyronak Andreas J. Andersson 2022-10-01T00:00:00Z https://doi.org/10.1038/s41598-022-21831-y https://doaj.org/article/15069afcc4c04db5a3d78111471f7443 EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-21831-y https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-21831-y 2045-2322 https://doaj.org/article/15069afcc4c04db5a3d78111471f7443 Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-21831-y 2022-12-30T23:05:24Z Abstract The California Current System experiences seasonal ocean acidification and hypoxia (OAH) owing to wind-driven upwelling, but little is known about the intensity, frequency, and depth distribution of OAH in the shallow nearshore environment. Here we present observations of OAH and dissolved inorganic carbon and nutrient parameters based on monthly transects from March 2017 to September 2018 extending from the surf zone to the ~ 40 m depth contour in La Jolla, California. Biologically concerning OAH conditions were observed at depths as shallow as 10 m and as close as 700 m to the shoreline. Below 20 m depth, 8% of observations were undersaturated with respect to aragonite, 28% of observations had a pHT less than 7.85, and 19% of observations were below the sublethal oxygen threshold of 157 µmol kg−1. These observations raise important questions about the impacts of OAH on coastal organisms and ecosystems and how future intensified upwelling may exacerbate these conditions. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Scientific Reports 12 1 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Medicine R Science Q |
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Medicine R Science Q Samuel A. H. Kekuewa Travis A. Courtney Tyler Cyronak Andreas J. Andersson Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
topic_facet |
Medicine R Science Q |
description |
Abstract The California Current System experiences seasonal ocean acidification and hypoxia (OAH) owing to wind-driven upwelling, but little is known about the intensity, frequency, and depth distribution of OAH in the shallow nearshore environment. Here we present observations of OAH and dissolved inorganic carbon and nutrient parameters based on monthly transects from March 2017 to September 2018 extending from the surf zone to the ~ 40 m depth contour in La Jolla, California. Biologically concerning OAH conditions were observed at depths as shallow as 10 m and as close as 700 m to the shoreline. Below 20 m depth, 8% of observations were undersaturated with respect to aragonite, 28% of observations had a pHT less than 7.85, and 19% of observations were below the sublethal oxygen threshold of 157 µmol kg−1. These observations raise important questions about the impacts of OAH on coastal organisms and ecosystems and how future intensified upwelling may exacerbate these conditions. |
format |
Article in Journal/Newspaper |
author |
Samuel A. H. Kekuewa Travis A. Courtney Tyler Cyronak Andreas J. Andersson |
author_facet |
Samuel A. H. Kekuewa Travis A. Courtney Tyler Cyronak Andreas J. Andersson |
author_sort |
Samuel A. H. Kekuewa |
title |
Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
title_short |
Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
title_full |
Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
title_fullStr |
Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
title_full_unstemmed |
Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
title_sort |
seasonal nearshore ocean acidification and deoxygenation in the southern california bight |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-21831-y https://doaj.org/article/15069afcc4c04db5a3d78111471f7443 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-10 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-21831-y https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-21831-y 2045-2322 https://doaj.org/article/15069afcc4c04db5a3d78111471f7443 |
op_doi |
https://doi.org/10.1038/s41598-022-21831-y |
container_title |
Scientific Reports |
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12 |
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1 |
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1766156775299481600 |