Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model
Ocean acidification from the uptake of anthropogenic carbon is simulated for the industrial period and IPCC SRES emission scenarios A2 and B1 with a global coupled carbon cycle-climate model. Earlier studies identified seawater saturation state with respect to aragonite, a mineral phase of calcium c...
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ftdoajarticles:oai:doaj.org/article:a89ccdb47fce436cb17da2a9fe80b782 2023-05-15T14:41:25+02:00 Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model M. Steinacher F. Joos T. L. Frölicher G.-K. Plattner S. C. Doney 2009-04-01T00:00:00Z https://doaj.org/article/a89ccdb47fce436cb17da2a9fe80b782 EN eng Copernicus Publications http://www.biogeosciences.net/6/515/2009/bg-6-515-2009.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/a89ccdb47fce436cb17da2a9fe80b782 Biogeosciences, Vol 6, Iss 4, Pp 515-533 (2009) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2009 ftdoajarticles 2022-12-30T21:39:11Z Ocean acidification from the uptake of anthropogenic carbon is simulated for the industrial period and IPCC SRES emission scenarios A2 and B1 with a global coupled carbon cycle-climate model. Earlier studies identified seawater saturation state with respect to aragonite, a mineral phase of calcium carbonate, as a key variable governing impacts on corals and other shell-forming organisms. Globally in the A2 scenario, water saturated by more than 300%, considered suitable for coral growth, vanishes by 2070 AD (CO 2 ≈630 ppm), and the ocean volume fraction occupied by saturated water decreases from 42% to 25% over this century. The largest simulated pH changes worldwide occur in Arctic surface waters, where hydrogen ion concentration increases by up to 185% (ΔpH=−0.45). Projected climate change amplifies the decrease in Arctic surface mean saturation and pH by more than 20%, mainly due to freshening and increased carbon uptake in response to sea ice retreat. Modeled saturation compares well with observation-based estimates along an Arctic transect and simulated changes have been corrected for remaining model-data differences in this region. Aragonite undersaturation in Arctic surface waters is projected to occur locally within a decade and to become more widespread as atmospheric CO 2 continues to grow. The results imply that surface waters in the Arctic Ocean will become corrosive to aragonite, with potentially large implications for the marine ecosystem, if anthropogenic carbon emissions are not reduced and atmospheric CO 2 not kept below 450 ppm. Article in Journal/Newspaper Arctic Arctic Ocean Climate change Ocean acidification Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 M. Steinacher F. Joos T. L. Frölicher G.-K. Plattner S. C. Doney Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Ocean acidification from the uptake of anthropogenic carbon is simulated for the industrial period and IPCC SRES emission scenarios A2 and B1 with a global coupled carbon cycle-climate model. Earlier studies identified seawater saturation state with respect to aragonite, a mineral phase of calcium carbonate, as a key variable governing impacts on corals and other shell-forming organisms. Globally in the A2 scenario, water saturated by more than 300%, considered suitable for coral growth, vanishes by 2070 AD (CO 2 ≈630 ppm), and the ocean volume fraction occupied by saturated water decreases from 42% to 25% over this century. The largest simulated pH changes worldwide occur in Arctic surface waters, where hydrogen ion concentration increases by up to 185% (ΔpH=−0.45). Projected climate change amplifies the decrease in Arctic surface mean saturation and pH by more than 20%, mainly due to freshening and increased carbon uptake in response to sea ice retreat. Modeled saturation compares well with observation-based estimates along an Arctic transect and simulated changes have been corrected for remaining model-data differences in this region. Aragonite undersaturation in Arctic surface waters is projected to occur locally within a decade and to become more widespread as atmospheric CO 2 continues to grow. The results imply that surface waters in the Arctic Ocean will become corrosive to aragonite, with potentially large implications for the marine ecosystem, if anthropogenic carbon emissions are not reduced and atmospheric CO 2 not kept below 450 ppm. |
format |
Article in Journal/Newspaper |
author |
M. Steinacher F. Joos T. L. Frölicher G.-K. Plattner S. C. Doney |
author_facet |
M. Steinacher F. Joos T. L. Frölicher G.-K. Plattner S. C. Doney |
author_sort |
M. Steinacher |
title |
Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model |
title_short |
Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model |
title_full |
Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model |
title_fullStr |
Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model |
title_full_unstemmed |
Imminent ocean acidification in the Arctic projected with the NCAR global coupled carbon cycle-climate model |
title_sort |
imminent ocean acidification in the arctic projected with the ncar global coupled carbon cycle-climate model |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doaj.org/article/a89ccdb47fce436cb17da2a9fe80b782 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Ocean acidification Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Ocean acidification Sea ice |
op_source |
Biogeosciences, Vol 6, Iss 4, Pp 515-533 (2009) |
op_relation |
http://www.biogeosciences.net/6/515/2009/bg-6-515-2009.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 1726-4170 1726-4189 https://doaj.org/article/a89ccdb47fce436cb17da2a9fe80b782 |
_version_ |
1766313188712775680 |