Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data
Atmospheric measurements of O-2/N-2 and CO 2 at up to nine sites have been used to infer the interannual variations in oceanic O-2 exchange with an inverse method. The method distinguishes the regional contributions of three latitudinal bands, partly the individual contributions of the North Pacific...
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ftpubman:oai:pure.mpg.de:item_1692598 2023-08-27T04:10:47+02:00 Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data Rödenbeck, C. Le Quéré, C. Heimann, M. Keeling, R. 2008 application/octet-stream http://hdl.handle.net/11858/00-001M-0000-000E-D749-F http://hdl.handle.net/11858/00-001M-0000-000E-D748-2 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2008.00375.x http://hdl.handle.net/11858/00-001M-0000-000E-D749-F http://hdl.handle.net/11858/00-001M-0000-000E-D748-2 Tellus, Series B - Chemical and Physical Meteorology info:eu-repo/semantics/article 2008 ftpubman https://doi.org/10.1111/j.1600-0889.2008.00375.x 2023-08-02T01:03:03Z Atmospheric measurements of O-2/N-2 and CO 2 at up to nine sites have been used to infer the interannual variations in oceanic O-2 exchange with an inverse method. The method distinguishes the regional contributions of three latitudinal bands, partly the individual contributions of the North Pacific and the North Atlantic also. The interannual variations of the inferred O-2 fluxes in the tropical band correlate significantly with the El Nino/Southern Oscillation. Tropical O-2 variations appear to be dominated by the ventilation of the O-2 minimum zone from variations in Pacific equatorial upwelling. The interannual variations of the northern and southern extratropical bands are of similar amplitude, though the attribution to mechanisms is less clear. The interannual variations estimated by the inverse method are larger than those estimated by the current generation of global ocean biogeochemistry models, especially in the North Atlantic, suggesting that the representation of biological processes plays a role. The comparison further suggests that O-2 variability is a more stringent test to validate models than CO 2 variability, because the processes driving O-2 variability combine in the same direction and amplify the underlying climatic signal. Article in Journal/Newspaper North Atlantic Max Planck Society: MPG.PuRe Pacific Tellus B: Chemical and Physical Meteorology 60 5 685 705 |
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Max Planck Society: MPG.PuRe |
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ftpubman |
language |
English |
description |
Atmospheric measurements of O-2/N-2 and CO 2 at up to nine sites have been used to infer the interannual variations in oceanic O-2 exchange with an inverse method. The method distinguishes the regional contributions of three latitudinal bands, partly the individual contributions of the North Pacific and the North Atlantic also. The interannual variations of the inferred O-2 fluxes in the tropical band correlate significantly with the El Nino/Southern Oscillation. Tropical O-2 variations appear to be dominated by the ventilation of the O-2 minimum zone from variations in Pacific equatorial upwelling. The interannual variations of the northern and southern extratropical bands are of similar amplitude, though the attribution to mechanisms is less clear. The interannual variations estimated by the inverse method are larger than those estimated by the current generation of global ocean biogeochemistry models, especially in the North Atlantic, suggesting that the representation of biological processes plays a role. The comparison further suggests that O-2 variability is a more stringent test to validate models than CO 2 variability, because the processes driving O-2 variability combine in the same direction and amplify the underlying climatic signal. |
format |
Article in Journal/Newspaper |
author |
Rödenbeck, C. Le Quéré, C. Heimann, M. Keeling, R. |
spellingShingle |
Rödenbeck, C. Le Quéré, C. Heimann, M. Keeling, R. Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data |
author_facet |
Rödenbeck, C. Le Quéré, C. Heimann, M. Keeling, R. |
author_sort |
Rödenbeck, C. |
title |
Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data |
title_short |
Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data |
title_full |
Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data |
title_fullStr |
Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data |
title_full_unstemmed |
Interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric O 2 /N 2 and CO 2 data |
title_sort |
interannual variability in oceanic biogeochemical processes inferred by inversion of atmospheric o 2 /n 2 and co 2 data |
publishDate |
2008 |
url |
http://hdl.handle.net/11858/00-001M-0000-000E-D749-F http://hdl.handle.net/11858/00-001M-0000-000E-D748-2 |
geographic |
Pacific |
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Pacific |
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North Atlantic |
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North Atlantic |
op_source |
Tellus, Series B - Chemical and Physical Meteorology |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/j.1600-0889.2008.00375.x http://hdl.handle.net/11858/00-001M-0000-000E-D749-F http://hdl.handle.net/11858/00-001M-0000-000E-D748-2 |
op_doi |
https://doi.org/10.1111/j.1600-0889.2008.00375.x |
container_title |
Tellus B: Chemical and Physical Meteorology |
container_volume |
60 |
container_issue |
5 |
container_start_page |
685 |
op_container_end_page |
705 |
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1775353104664887296 |