Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble
Internal and externally forced variability in oceanic oxygen (O2) are investigated on different spatiotemporal scales using a six-member ensemble from the National Center for Atmospheric Research CSM1.4-carbon coupled climate model. The oceanic O2 inventory is projected to decrease significantly in...
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Online Access: | https://boris.unibe.ch/37494/1/2008GB003316.pdf https://boris.unibe.ch/37494/ |
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ftunivbern:oai:boris.unibe.ch:37494 2023-08-20T04:08:13+02:00 Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble Frölicher, T. L. Joos, F. Plattner, G.-K. Steinacher, M. Doney, S.C. 2009 application/pdf https://boris.unibe.ch/37494/1/2008GB003316.pdf https://boris.unibe.ch/37494/ eng eng American Geophysical Union https://boris.unibe.ch/37494/ info:eu-repo/semantics/openAccess Frölicher, T. L.; Joos, F.; Plattner, G.-K.; Steinacher, M.; Doney, S.C. (2009). Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble. Global biogeochemical cycles, 23(1), n/a-n/a. Washington, D.C.: American Geophysical Union 10.1029/2008GB003316 <http://dx.doi.org/10.1029/2008GB003316> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2009 ftunivbern https://doi.org/10.1029/2008GB003316 2023-07-31T20:59:35Z Internal and externally forced variability in oceanic oxygen (O2) are investigated on different spatiotemporal scales using a six-member ensemble from the National Center for Atmospheric Research CSM1.4-carbon coupled climate model. The oceanic O2 inventory is projected to decrease significantly in global warming simulations of the 20th and 21st centuries. The anthropogenically forced O2 decrease is partly compensated by volcanic eruptions, which cause considerable interannual to decadal variability. Volcanic perturbations in oceanic oxygen concentrations gradually penetrate the ocean’s top 500 m and persist for several years. While well identified on global scales, the detection and attribution of local O2 changes to volcanic forcing is difficult because of unforced variability. Internal climate modes can substantially contribute to surface and subsurface O2 variability. Variability in the North Atlantic and North Pacific are associated with changes in the North Atlantic Oscillation and Pacific Decadal Oscillation indexes. Simulated decadal variability compares well with observed O2 changes in the North Atlantic, suggesting that the model captures key mechanisms of late 20th century O2 variability, but the model appears to underestimate variability in the North Pacific. Our results suggest that large interannual to decadal variations and limited data availability make the detection of human-induced O2 changes currently challenging. Article in Journal/Newspaper North Atlantic North Atlantic oscillation BORIS (Bern Open Repository and Information System, University of Bern) Pacific Global Biogeochemical Cycles 23 1 n/a n/a |
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Open Polar |
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BORIS (Bern Open Repository and Information System, University of Bern) |
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ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Frölicher, T. L. Joos, F. Plattner, G.-K. Steinacher, M. Doney, S.C. Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
topic_facet |
530 Physics |
description |
Internal and externally forced variability in oceanic oxygen (O2) are investigated on different spatiotemporal scales using a six-member ensemble from the National Center for Atmospheric Research CSM1.4-carbon coupled climate model. The oceanic O2 inventory is projected to decrease significantly in global warming simulations of the 20th and 21st centuries. The anthropogenically forced O2 decrease is partly compensated by volcanic eruptions, which cause considerable interannual to decadal variability. Volcanic perturbations in oceanic oxygen concentrations gradually penetrate the ocean’s top 500 m and persist for several years. While well identified on global scales, the detection and attribution of local O2 changes to volcanic forcing is difficult because of unforced variability. Internal climate modes can substantially contribute to surface and subsurface O2 variability. Variability in the North Atlantic and North Pacific are associated with changes in the North Atlantic Oscillation and Pacific Decadal Oscillation indexes. Simulated decadal variability compares well with observed O2 changes in the North Atlantic, suggesting that the model captures key mechanisms of late 20th century O2 variability, but the model appears to underestimate variability in the North Pacific. Our results suggest that large interannual to decadal variations and limited data availability make the detection of human-induced O2 changes currently challenging. |
format |
Article in Journal/Newspaper |
author |
Frölicher, T. L. Joos, F. Plattner, G.-K. Steinacher, M. Doney, S.C. |
author_facet |
Frölicher, T. L. Joos, F. Plattner, G.-K. Steinacher, M. Doney, S.C. |
author_sort |
Frölicher, T. L. |
title |
Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
title_short |
Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
title_full |
Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
title_fullStr |
Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
title_full_unstemmed |
Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
title_sort |
natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
https://boris.unibe.ch/37494/1/2008GB003316.pdf https://boris.unibe.ch/37494/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Frölicher, T. L.; Joos, F.; Plattner, G.-K.; Steinacher, M.; Doney, S.C. (2009). Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle-climate model ensemble. Global biogeochemical cycles, 23(1), n/a-n/a. Washington, D.C.: American Geophysical Union 10.1029/2008GB003316 <http://dx.doi.org/10.1029/2008GB003316> |
op_relation |
https://boris.unibe.ch/37494/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2008GB003316 |
container_title |
Global Biogeochemical Cycles |
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23 |
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1 |
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1774720367758147584 |