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...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-10-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-21831-y |
| _version_ | 1811335352223268864 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-04-13T17:23:51Z |
| format | Article |
| id | doaj.art-15069afcc4c04db5a3d78111471f7443 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T17:23:51Z |
| publishDate | 2022-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-15069afcc4c04db5a3d78111471f74432022-12-22T02:37:53ZengNature PortfolioScientific Reports2045-23222022-10-0112111010.1038/s41598-022-21831-ySeasonal nearshore ocean acidification and deoxygenation in the Southern California BightSamuel A. H. Kekuewa0Travis A. Courtney1Tyler Cyronak2Andreas J. Andersson3Scripps Institution of Oceanography, University of California San DiegoDepartment of Marine Sciences, University of Puerto Rico MayagüezDepartment of Marine and Environmental Sciences, Halmos College of Natural Sciences and Oceanography, Nova Southeastern UniversityScripps Institution of Oceanography, University of California San DiegoAbstract 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.https://doi.org/10.1038/s41598-022-21831-y |
| spellingShingle | Samuel A. H. Kekuewa Travis A. Courtney Tyler Cyronak Andreas J. Andersson Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight Scientific Reports |
| title | 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_short | Seasonal nearshore ocean acidification and deoxygenation in the Southern California Bight |
| title_sort | seasonal nearshore ocean acidification and deoxygenation in the southern california bight |
| url | https://doi.org/10.1038/s41598-022-21831-y |
| work_keys_str_mv | AT samuelahkekuewa seasonalnearshoreoceanacidificationanddeoxygenationinthesoutherncaliforniabight AT travisacourtney seasonalnearshoreoceanacidificationanddeoxygenationinthesoutherncaliforniabight AT tylercyronak seasonalnearshoreoceanacidificationanddeoxygenationinthesoutherncaliforniabight AT andreasjandersson seasonalnearshoreoceanacidificationanddeoxygenationinthesoutherncaliforniabight |