Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia
Abstract The Strait of Georgia (SoG) is a large semienclosed estuary that spatially dominates the Salish Sea on the North American Pacific coast. The region is well populated, harbors significant aquaculture, and is vulnerable to climate change. We present the first inorganic carbon data collected i...
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068996 |
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| author | Debby Ianson Susan E. Allen Benjamin L. Moore‐Maley Sophia C. Johannessen and Robie W. Macdonald |
| author_facet | Debby Ianson Susan E. Allen Benjamin L. Moore‐Maley Sophia C. Johannessen and Robie W. Macdonald |
| author_sort | Debby Ianson |
| collection | DOAJ |
| description | Abstract The Strait of Georgia (SoG) is a large semienclosed estuary that spatially dominates the Salish Sea on the North American Pacific coast. The region is well populated, harbors significant aquaculture, and is vulnerable to climate change. We present the first inorganic carbon data collected in the SoG covering all seasons (2003 and 2010–2012) and put them into the context of local circulation and oxygen cycles. Results show that the SoG has a higher carbon content and lower pH than surrounding waters. Aragonite saturation horizons in the SoG do not become deeper than 20–30 m and shoal to the surface for extended periods. Furthermore, incoming upwelled “acidified” water from the outer coast actually increases local pH. Finally, intense mixing in the physically restricted channels connecting the SoG to the outer coast allows significant oxygen uptake but minimal CO2 out gassing, protecting the SoG from hypoxia but not from ocean acidification. |
| format | Article |
| id | doaj-art-31f61887df0342fb82e576c9bda0a39e |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-31f61887df0342fb82e576c9bda0a39e2025-08-20T01:51:54ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143115793580110.1002/2016GL068996Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxiaDebby Ianson0Susan E. Allen1Benjamin L. Moore‐Maley2Sophia C. Johannessen3and Robie W. Macdonald4Institute of Ocean Sciences Fisheries and Oceans Canada Sidney British Columbia CanadaDepartment of Earth, Ocean and Atmospheric Science University of British Columbia Vancouver British Columbia CanadaDepartment of Earth, Ocean and Atmospheric Science University of British Columbia Vancouver British Columbia CanadaInstitute of Ocean Sciences Fisheries and Oceans Canada Sidney British Columbia CanadaInstitute of Ocean Sciences Fisheries and Oceans Canada Sidney British Columbia CanadaAbstract The Strait of Georgia (SoG) is a large semienclosed estuary that spatially dominates the Salish Sea on the North American Pacific coast. The region is well populated, harbors significant aquaculture, and is vulnerable to climate change. We present the first inorganic carbon data collected in the SoG covering all seasons (2003 and 2010–2012) and put them into the context of local circulation and oxygen cycles. Results show that the SoG has a higher carbon content and lower pH than surrounding waters. Aragonite saturation horizons in the SoG do not become deeper than 20–30 m and shoal to the surface for extended periods. Furthermore, incoming upwelled “acidified” water from the outer coast actually increases local pH. Finally, intense mixing in the physically restricted channels connecting the SoG to the outer coast allows significant oxygen uptake but minimal CO2 out gassing, protecting the SoG from hypoxia but not from ocean acidification.https://doi.org/10.1002/2016GL068996ocean acidificationhypoxiaestuarine seasgas exchangetidal mixingriverine carbon |
| spellingShingle | Debby Ianson Susan E. Allen Benjamin L. Moore‐Maley Sophia C. Johannessen and Robie W. Macdonald Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia Geophysical Research Letters ocean acidification hypoxia estuarine seas gas exchange tidal mixing riverine carbon |
| title | Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia |
| title_full | Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia |
| title_fullStr | Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia |
| title_full_unstemmed | Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia |
| title_short | Vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia |
| title_sort | vulnerability of a semienclosed estuarine sea to ocean acidification in contrast with hypoxia |
| topic | ocean acidification hypoxia estuarine seas gas exchange tidal mixing riverine carbon |
| url | https://doi.org/10.1002/2016GL068996 |
| work_keys_str_mv | AT debbyianson vulnerabilityofasemienclosedestuarineseatooceanacidificationincontrastwithhypoxia AT susaneallen vulnerabilityofasemienclosedestuarineseatooceanacidificationincontrastwithhypoxia AT benjaminlmooremaley vulnerabilityofasemienclosedestuarineseatooceanacidificationincontrastwithhypoxia AT sophiacjohannessen vulnerabilityofasemienclosedestuarineseatooceanacidificationincontrastwithhypoxia AT androbiewmacdonald vulnerabilityofasemienclosedestuarineseatooceanacidificationincontrastwithhypoxia |