Ocean Acidification in the California Current System
Eastern boundary upwelling systems (EBUS) are naturally more acidic than most of the rest of the surface ocean. Observations of EBUS already show pH values and saturation states with regard to the carbonate mineral aragonite that are as low as those expected for most open ocean waters several decade...
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The Oceanography Society
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ftdoajarticles:oai:doaj.org/article:da58a7ab514f4863b470564785a3516b 2023-05-15T17:49:28+02:00 Ocean Acidification in the California Current System Claudine Hauri Nicolas Gruber Gian-Kasper Plattner Simone Alin Richard A. Feely Burke Hales Patricia A. Wheeler 2009-12-01T00:00:00Z https://doaj.org/article/da58a7ab514f4863b470564785a3516b EN eng The Oceanography Society http://tos.org/oceanography/issues/issue_archive/issue_pdfs/22_4/22-4_hauri.pdf https://doaj.org/toc/1042-8275 1042-8275 https://doaj.org/article/da58a7ab514f4863b470564785a3516b Oceanography, Vol 22, Iss 4, Pp 60-71 (2009) California Current eastern boundary current ocean carbonate chemistry ocean acidification aragonite undersaturation Oceanography GC1-1581 article 2009 ftdoajarticles 2022-12-31T02:40:20Z Eastern boundary upwelling systems (EBUS) are naturally more acidic than most of the rest of the surface ocean. Observations of EBUS already show pH values and saturation states with regard to the carbonate mineral aragonite that are as low as those expected for most open ocean waters several decades from now. Thus, as atmospheric CO2 increases further, EBUS are prone to widespread and persistent undersaturation with regard to aragonite, making them especially sensitive to ocean acidification. Here, we describe ocean carbonate chemistry and its short-term-to-seasonal variability in one major EBUS, the California Current System (CCS), based on observations and results from an eddy-resolving regional model. Results reveal high variability in ocean carbonate chemistry, largely driven by seasonal upwelling of waters with low pH and saturation states, and subsequent interactions of transport and biological production. Model simulations confirm that the pH of CCS waters has decreased by about 0.1 pH unit and by 0.5 in saturation state since preindustrial times. A first assessment of the vulnerability of CCS marine organisms and ecosystems to ocean acidification suggests that there will be winners and losers, likely provoking changes in species composition. Benthic organisms appear to be among those that will be most affected by the continuing acidification of the CCS. More accurate projections require special consideration of the integrated effects of ocean acidification, ocean warming, decreasing oxygen levels, and other processes that are expected with global change. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
California Current eastern boundary current ocean carbonate chemistry ocean acidification aragonite undersaturation Oceanography GC1-1581 |
spellingShingle |
California Current eastern boundary current ocean carbonate chemistry ocean acidification aragonite undersaturation Oceanography GC1-1581 Claudine Hauri Nicolas Gruber Gian-Kasper Plattner Simone Alin Richard A. Feely Burke Hales Patricia A. Wheeler Ocean Acidification in the California Current System |
topic_facet |
California Current eastern boundary current ocean carbonate chemistry ocean acidification aragonite undersaturation Oceanography GC1-1581 |
description |
Eastern boundary upwelling systems (EBUS) are naturally more acidic than most of the rest of the surface ocean. Observations of EBUS already show pH values and saturation states with regard to the carbonate mineral aragonite that are as low as those expected for most open ocean waters several decades from now. Thus, as atmospheric CO2 increases further, EBUS are prone to widespread and persistent undersaturation with regard to aragonite, making them especially sensitive to ocean acidification. Here, we describe ocean carbonate chemistry and its short-term-to-seasonal variability in one major EBUS, the California Current System (CCS), based on observations and results from an eddy-resolving regional model. Results reveal high variability in ocean carbonate chemistry, largely driven by seasonal upwelling of waters with low pH and saturation states, and subsequent interactions of transport and biological production. Model simulations confirm that the pH of CCS waters has decreased by about 0.1 pH unit and by 0.5 in saturation state since preindustrial times. A first assessment of the vulnerability of CCS marine organisms and ecosystems to ocean acidification suggests that there will be winners and losers, likely provoking changes in species composition. Benthic organisms appear to be among those that will be most affected by the continuing acidification of the CCS. More accurate projections require special consideration of the integrated effects of ocean acidification, ocean warming, decreasing oxygen levels, and other processes that are expected with global change. |
format |
Article in Journal/Newspaper |
author |
Claudine Hauri Nicolas Gruber Gian-Kasper Plattner Simone Alin Richard A. Feely Burke Hales Patricia A. Wheeler |
author_facet |
Claudine Hauri Nicolas Gruber Gian-Kasper Plattner Simone Alin Richard A. Feely Burke Hales Patricia A. Wheeler |
author_sort |
Claudine Hauri |
title |
Ocean Acidification in the California Current System |
title_short |
Ocean Acidification in the California Current System |
title_full |
Ocean Acidification in the California Current System |
title_fullStr |
Ocean Acidification in the California Current System |
title_full_unstemmed |
Ocean Acidification in the California Current System |
title_sort |
ocean acidification in the california current system |
publisher |
The Oceanography Society |
publishDate |
2009 |
url |
https://doaj.org/article/da58a7ab514f4863b470564785a3516b |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Oceanography, Vol 22, Iss 4, Pp 60-71 (2009) |
op_relation |
http://tos.org/oceanography/issues/issue_archive/issue_pdfs/22_4/22-4_hauri.pdf https://doaj.org/toc/1042-8275 1042-8275 https://doaj.org/article/da58a7ab514f4863b470564785a3516b |
_version_ |
1766155818253680640 |