A 37-year record of ocean acidification in the Southern California current
Abstract Long-term ocean time series have proven to be the most robust approach for direct observation of climate change processes such as Ocean Acidification. The California Cooperative Oceanic Fisheries Investigations (CalCOFI) program has collected quarterly samples for seawater inorganic carbon...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-11-01
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| Series: | Communications Earth & Environment |
| Online Access: | https://doi.org/10.1038/s43247-023-01065-0 |
| _version_ | 1797636710343901184 |
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| author | Wiley H. Wolfe Todd R. Martz Andrew G. Dickson Ralf Goericke Mark D. Ohman |
| author_facet | Wiley H. Wolfe Todd R. Martz Andrew G. Dickson Ralf Goericke Mark D. Ohman |
| author_sort | Wiley H. Wolfe |
| collection | DOAJ |
| description | Abstract Long-term ocean time series have proven to be the most robust approach for direct observation of climate change processes such as Ocean Acidification. The California Cooperative Oceanic Fisheries Investigations (CalCOFI) program has collected quarterly samples for seawater inorganic carbon since 1983. The longest time series is at CalCOFI line 90 station 90 from 1984–present, with a gap from 2002 to 2008. Here we present the first analysis of this 37- year time series, the oldest in the Pacific. Station 90.90 exhibits an unambiguous acidification signal in agreement with the global surface ocean (decrease in pH of −0.0015 ± 0.0001 yr−1), with a distinct seasonal cycle driven by temperature and total dissolved inorganic carbon. This provides direct evidence that the unique carbon chemistry signature (compared to other long standing time series) results in a reduced uptake rate of carbon dioxide (CO2) due to proximity to a mid-latitude eastern boundary current upwelling zone. Comparison to an independent empirical model estimate and climatology at the same location reveals regional differences not captured in the existing models. |
| first_indexed | 2024-03-11T12:37:59Z |
| format | Article |
| id | doaj.art-cc39e529a98b4e29b55cfebeece74711 |
| institution | Directory Open Access Journal |
| issn | 2662-4435 |
| language | English |
| last_indexed | 2024-03-11T12:37:59Z |
| publishDate | 2023-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Earth & Environment |
| spelling | doaj.art-cc39e529a98b4e29b55cfebeece747112023-11-05T12:30:30ZengNature PortfolioCommunications Earth & Environment2662-44352023-11-01411710.1038/s43247-023-01065-0A 37-year record of ocean acidification in the Southern California currentWiley H. Wolfe0Todd R. Martz1Andrew G. Dickson2Ralf Goericke3Mark D. Ohman4Scripps Institution of Oceanography, University of California San DiegoScripps Institution of Oceanography, University of California San DiegoScripps Institution of Oceanography, University of California San DiegoScripps Institution of Oceanography, University of California San DiegoScripps Institution of Oceanography, University of California San DiegoAbstract Long-term ocean time series have proven to be the most robust approach for direct observation of climate change processes such as Ocean Acidification. The California Cooperative Oceanic Fisheries Investigations (CalCOFI) program has collected quarterly samples for seawater inorganic carbon since 1983. The longest time series is at CalCOFI line 90 station 90 from 1984–present, with a gap from 2002 to 2008. Here we present the first analysis of this 37- year time series, the oldest in the Pacific. Station 90.90 exhibits an unambiguous acidification signal in agreement with the global surface ocean (decrease in pH of −0.0015 ± 0.0001 yr−1), with a distinct seasonal cycle driven by temperature and total dissolved inorganic carbon. This provides direct evidence that the unique carbon chemistry signature (compared to other long standing time series) results in a reduced uptake rate of carbon dioxide (CO2) due to proximity to a mid-latitude eastern boundary current upwelling zone. Comparison to an independent empirical model estimate and climatology at the same location reveals regional differences not captured in the existing models.https://doi.org/10.1038/s43247-023-01065-0 |
| spellingShingle | Wiley H. Wolfe Todd R. Martz Andrew G. Dickson Ralf Goericke Mark D. Ohman A 37-year record of ocean acidification in the Southern California current Communications Earth & Environment |
| title | A 37-year record of ocean acidification in the Southern California current |
| title_full | A 37-year record of ocean acidification in the Southern California current |
| title_fullStr | A 37-year record of ocean acidification in the Southern California current |
| title_full_unstemmed | A 37-year record of ocean acidification in the Southern California current |
| title_short | A 37-year record of ocean acidification in the Southern California current |
| title_sort | 37 year record of ocean acidification in the southern california current |
| url | https://doi.org/10.1038/s43247-023-01065-0 |
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