Present and future changes in seawater chemistry due to ocean acidification
The oceanic uptake of anthropogenic CO₂ changes the seawater chemistry and potentially can alter biological systems in the upper oceans. Estimates of future atmospheric and oceanic CO₂ concentrations, based on the Intergovernmental Panel on Climate Change (IPCC) emission scenarios, indicate that atm...
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ftncar:oai:drupal-site.org:books_274 2023-10-01T03:58:37+02:00 Present and future changes in seawater chemistry due to ocean acidification Feely, R. (author) McPherson, B. (editor) Orr, J. (author) Sundquist, E. (editor) Fabry, V. (author) Kleypas, Joanie (author) Sabine, C. (author) Langdon, C. (author) 2009 http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-966 https://doi.org/10.1029/2005GM000337 en eng American Geophysical Union Carbon Sequestration and Its Role in the Global Carbon Cycle--http://dx.doi.org/10.1029/2005GM000337 ark:/85065/d7tt4s9x http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-966 doi:10.1029/2005GM000337 isbn: 978-0-87590-448-1 Copyright 2009 American Geophysical Union. Text chapter 2009 ftncar https://doi.org/10.1029/2005GM000337 2023-09-04T18:27:32Z The oceanic uptake of anthropogenic CO₂ changes the seawater chemistry and potentially can alter biological systems in the upper oceans. Estimates of future atmospheric and oceanic CO₂ concentrations, based on the Intergovernmental Panel on Climate Change (IPCC) emission scenarios, indicate that atmospheric CO₂ levels could approach 800 ppm by the end of the century. Corresponding models for the oceans indicate that surface water pH would decrease by approximately 0.4 pH units, and the carbonate ion concentration would decrease by as much as 48% by the end of the century. The surface ocean pH would be lower than it has been for more than 20 million years. Such changes would significantly lower the ocean's buffering capacity, which would reduce its ability to accept more CO₂ from the atmosphere. Recent field and laboratory studies reveal that the carbonate chemistry of seawater has a profound impact on the calcification rates of individual species and communities in both planktonic and benthic habitats. The calcification rates of nearly all calcifying organisms studied to date decrease in response to decreased carbonate ion concentration. In general, when pCO₂ was increased to twice preindustrial levels, a decrease in the calcification rate ranging from about -5% to -60% was observed. Unless calcifying organisms can adapt to projected changes in seawater chemistry, there will likely be profound changes in the structure of pelagic and benthic marine ecosystems. Article in Journal/Newspaper Ocean acidification OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) 175 188 |
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Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The oceanic uptake of anthropogenic CO₂ changes the seawater chemistry and potentially can alter biological systems in the upper oceans. Estimates of future atmospheric and oceanic CO₂ concentrations, based on the Intergovernmental Panel on Climate Change (IPCC) emission scenarios, indicate that atmospheric CO₂ levels could approach 800 ppm by the end of the century. Corresponding models for the oceans indicate that surface water pH would decrease by approximately 0.4 pH units, and the carbonate ion concentration would decrease by as much as 48% by the end of the century. The surface ocean pH would be lower than it has been for more than 20 million years. Such changes would significantly lower the ocean's buffering capacity, which would reduce its ability to accept more CO₂ from the atmosphere. Recent field and laboratory studies reveal that the carbonate chemistry of seawater has a profound impact on the calcification rates of individual species and communities in both planktonic and benthic habitats. The calcification rates of nearly all calcifying organisms studied to date decrease in response to decreased carbonate ion concentration. In general, when pCO₂ was increased to twice preindustrial levels, a decrease in the calcification rate ranging from about -5% to -60% was observed. Unless calcifying organisms can adapt to projected changes in seawater chemistry, there will likely be profound changes in the structure of pelagic and benthic marine ecosystems. |
author2 |
Feely, R. (author) McPherson, B. (editor) Orr, J. (author) Sundquist, E. (editor) Fabry, V. (author) Kleypas, Joanie (author) Sabine, C. (author) Langdon, C. (author) |
format |
Article in Journal/Newspaper |
title |
Present and future changes in seawater chemistry due to ocean acidification |
spellingShingle |
Present and future changes in seawater chemistry due to ocean acidification |
title_short |
Present and future changes in seawater chemistry due to ocean acidification |
title_full |
Present and future changes in seawater chemistry due to ocean acidification |
title_fullStr |
Present and future changes in seawater chemistry due to ocean acidification |
title_full_unstemmed |
Present and future changes in seawater chemistry due to ocean acidification |
title_sort |
present and future changes in seawater chemistry due to ocean acidification |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-966 https://doi.org/10.1029/2005GM000337 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Carbon Sequestration and Its Role in the Global Carbon Cycle--http://dx.doi.org/10.1029/2005GM000337 ark:/85065/d7tt4s9x http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-966 doi:10.1029/2005GM000337 isbn: 978-0-87590-448-1 |
op_rights |
Copyright 2009 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2005GM000337 |
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175 |
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188 |
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1778531533852770304 |