Is AOU a good measure of respiration in the oceans?
Apparent Oxygen Utilization (AOU) is widely used to infer respiration in the oceans by assuming that surface oxygen concentration is close to saturation with the overlying atmosphere. However, significant disequilibrium of oxygen has been observed in high latitude surface oceans where the deep water...
Published in: | Geophysical Research Letters |
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American Geophysical Union (AGU)
2004
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ftmit:oai:dspace.mit.edu:1721.1/106326 2023-06-11T04:16:34+02:00 Is AOU a good measure of respiration in the oceans? Follows, Michael J Boyle, Edward A Ito, Takamitsu Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Program in Atmospheres, Oceans, and Climate Woods Hole Oceanographic Institution Follows, Michael J Boyle, Edward A Ito, Takamitsu 2004-07 application/pdf http://hdl.handle.net/1721.1/106326 en_US eng American Geophysical Union (AGU) http://dx.doi.org/10.1029/2004GL020900 Geophysical Research Letters 00948276 http://hdl.handle.net/1721.1/106326 Ito, T., M. J. Follows, and E. A. Boyle. “Is AOU a Good Measure of Respiration in the Oceans?” Geophysical Research Letters 31.17 (2004): n. pag. © 2004 American Geophysical Union orcid:0000-0002-3102-0341 orcid:0000-0002-6394-1866 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. MIT Web Domain Article http://purl.org/eprint/type/JournalArticle 2004 ftmit https://doi.org/10.1029/2004GL020900 2023-05-29T08:30:16Z Apparent Oxygen Utilization (AOU) is widely used to infer respiration in the oceans by assuming that surface oxygen concentration is close to saturation with the overlying atmosphere. However, significant disequilibrium of oxygen has been observed in high latitude surface oceans where the deep waters are formed. We explicitly calculate True Oxygen Utilization (TOU) in a global ocean physical-biogeochemical model to evaluate the ability of AOU to represent respiration. We find significant differences between AOU and TOU in the deep waters, suggesting a systematic overestimation of respiration when inferred from AOU. The surface heat flux and the entrainment of thermocline waters together drive the surface undersaturation of oxygen in the regions of water mass formation, and their influences are significantly enhanced by sea ice cover at high latitudes. National Science Foundation (U.S.). Division of Polar Programs National Science Foundation (U.S.) (Grants OCE-0136609 and OCE-0350672) Article in Journal/Newspaper Sea ice DSpace@MIT (Massachusetts Institute of Technology) Geophysical Research Letters 31 17 n/a n/a |
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DSpace@MIT (Massachusetts Institute of Technology) |
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English |
description |
Apparent Oxygen Utilization (AOU) is widely used to infer respiration in the oceans by assuming that surface oxygen concentration is close to saturation with the overlying atmosphere. However, significant disequilibrium of oxygen has been observed in high latitude surface oceans where the deep waters are formed. We explicitly calculate True Oxygen Utilization (TOU) in a global ocean physical-biogeochemical model to evaluate the ability of AOU to represent respiration. We find significant differences between AOU and TOU in the deep waters, suggesting a systematic overestimation of respiration when inferred from AOU. The surface heat flux and the entrainment of thermocline waters together drive the surface undersaturation of oxygen in the regions of water mass formation, and their influences are significantly enhanced by sea ice cover at high latitudes. National Science Foundation (U.S.). Division of Polar Programs National Science Foundation (U.S.) (Grants OCE-0136609 and OCE-0350672) |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Massachusetts Institute of Technology. Program in Atmospheres, Oceans, and Climate Woods Hole Oceanographic Institution Follows, Michael J Boyle, Edward A Ito, Takamitsu |
format |
Article in Journal/Newspaper |
author |
Follows, Michael J Boyle, Edward A Ito, Takamitsu |
spellingShingle |
Follows, Michael J Boyle, Edward A Ito, Takamitsu Is AOU a good measure of respiration in the oceans? |
author_facet |
Follows, Michael J Boyle, Edward A Ito, Takamitsu |
author_sort |
Follows, Michael J |
title |
Is AOU a good measure of respiration in the oceans? |
title_short |
Is AOU a good measure of respiration in the oceans? |
title_full |
Is AOU a good measure of respiration in the oceans? |
title_fullStr |
Is AOU a good measure of respiration in the oceans? |
title_full_unstemmed |
Is AOU a good measure of respiration in the oceans? |
title_sort |
is aou a good measure of respiration in the oceans? |
publisher |
American Geophysical Union (AGU) |
publishDate |
2004 |
url |
http://hdl.handle.net/1721.1/106326 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
MIT Web Domain |
op_relation |
http://dx.doi.org/10.1029/2004GL020900 Geophysical Research Letters 00948276 http://hdl.handle.net/1721.1/106326 Ito, T., M. J. Follows, and E. A. Boyle. “Is AOU a Good Measure of Respiration in the Oceans?” Geophysical Research Letters 31.17 (2004): n. pag. © 2004 American Geophysical Union orcid:0000-0002-3102-0341 orcid:0000-0002-6394-1866 |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
op_doi |
https://doi.org/10.1029/2004GL020900 |
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Geophysical Research Letters |
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31 |
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17 |
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1768374947542990848 |