Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle–climate model ensemble
Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 23 (2009): GB1003, doi:10.1029/2008GB003316. Internal and externa...
Published in: | Global Biogeochemical Cycles |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2009
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/3414 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3414 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3414 2023-05-15T17:29:44+02:00 Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle–climate model ensemble Frolicher, T. L. Joos, Fortunat Plattner, Gian-Kasper Steinacher, M. Doney, Scott C. 2009-02-13 application/pdf text/plain application/postscript application/x-tex https://hdl.handle.net/1912/3414 en_US eng American Geophysical Union https://doi.org/10.1029/2008GB003316 Global Biogeochemical Cycles 23 (2009): GB1003 https://hdl.handle.net/1912/3414 doi:10.1029/2008GB003316 Global Biogeochemical Cycles 23 (2009): GB1003 doi:10.1029/2008GB003316 Oxygen variability Coupled carbon climate model Volcano Article 2009 ftwhoas https://doi.org/10.1029/2008GB003316 2022-05-28T22:57:58Z Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 23 (2009): GB1003, doi:10.1029/2008GB003316. 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. This study is supported by the EU projects CARBOOCEAN (511176-2) and EUROCEANS (511106-2) and the Swiss National Science Foundation. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Pacific Global Biogeochemical Cycles 23 1 n/a n/a |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Oxygen variability Coupled carbon climate model Volcano |
spellingShingle |
Oxygen variability Coupled carbon climate model Volcano Frolicher, T. L. Joos, Fortunat Plattner, Gian-Kasper Steinacher, M. Doney, Scott C. Natural variability and anthropogenic trends in oceanic oxygen in a coupled carbon cycle–climate model ensemble |
topic_facet |
Oxygen variability Coupled carbon climate model Volcano |
description |
Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 23 (2009): GB1003, doi:10.1029/2008GB003316. 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. This study is supported by the EU projects CARBOOCEAN (511176-2) and EUROCEANS (511106-2) and the Swiss National Science Foundation. |
format |
Article in Journal/Newspaper |
author |
Frolicher, T. L. Joos, Fortunat Plattner, Gian-Kasper Steinacher, M. Doney, Scott C. |
author_facet |
Frolicher, T. L. Joos, Fortunat Plattner, Gian-Kasper Steinacher, M. Doney, Scott C. |
author_sort |
Frolicher, 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://hdl.handle.net/1912/3414 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Global Biogeochemical Cycles 23 (2009): GB1003 doi:10.1029/2008GB003316 |
op_relation |
https://doi.org/10.1029/2008GB003316 Global Biogeochemical Cycles 23 (2009): GB1003 https://hdl.handle.net/1912/3414 doi:10.1029/2008GB003316 |
op_doi |
https://doi.org/10.1029/2008GB003316 |
container_title |
Global Biogeochemical Cycles |
container_volume |
23 |
container_issue |
1 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766124529626644480 |