Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation
Global ocean circulation connects marine biogeochemical cycles through the long-range transport of nutrients and oxygen with the Southern Ocean (SO) acting as a water mass crossroads. The biological pump in the SO has been shown to play an important role in these dynamics and the amount of export pr...
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ftoceanrep:oai:oceanrep.geomar.de:22432 2023-05-15T18:25:02+02:00 Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation Keller, David Oschlies, Andreas 2013 other https://oceanrep.geomar.de/id/eprint/22432/ https://oceanrep.geomar.de/id/eprint/22432/1/EUR-OCEANS_poster.pdf en eng https://oceanrep.geomar.de/id/eprint/22432/1/EUR-OCEANS_poster.pdf Keller, D. and Oschlies, A. (2013) Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation. [Poster] In: EUR-OCEANS Hot Topics Conference. , 6.-8.11.2013, Gran Canaria, Spain . cc_by_nd Conference or Workshop Item NonPeerReviewed 2013 ftoceanrep 2023-04-07T15:10:49Z Global ocean circulation connects marine biogeochemical cycles through the long-range transport of nutrients and oxygen with the Southern Ocean (SO) acting as a water mass crossroads. The biological pump in the SO has been shown to play an important role in these dynamics and the amount of export production is known to have a large impact on remote deep ocean nutrients and dissolved inorganic carbon. However, the role that the SO biological pump plays in determining ocean oxygen concentrations is less well understood. In this study we investigate these dynamics by shutting off the SO biological pump in three different general ocean circulation models, each of which is coupled to a different prognostic biogeochemical model. Our results indicate that the present day SO biological pump is responsible for reducing oxygen levels in the deep ocean by up 70 mmol m-3. The SO biological pump also removes nutrients that would otherwise be used to fuel productivity and subsequently reduce oxygen in mid- to low-latitude sub-surface waters (i.e., without the SO biological pump, oxygen is lower in these regions due to higher productivity). Since SO productivity and export is expected to change in response to climate change we also examine the role that these changes may play in future ocean deoxygenation. Conference Object Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Southern Ocean |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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English |
description |
Global ocean circulation connects marine biogeochemical cycles through the long-range transport of nutrients and oxygen with the Southern Ocean (SO) acting as a water mass crossroads. The biological pump in the SO has been shown to play an important role in these dynamics and the amount of export production is known to have a large impact on remote deep ocean nutrients and dissolved inorganic carbon. However, the role that the SO biological pump plays in determining ocean oxygen concentrations is less well understood. In this study we investigate these dynamics by shutting off the SO biological pump in three different general ocean circulation models, each of which is coupled to a different prognostic biogeochemical model. Our results indicate that the present day SO biological pump is responsible for reducing oxygen levels in the deep ocean by up 70 mmol m-3. The SO biological pump also removes nutrients that would otherwise be used to fuel productivity and subsequently reduce oxygen in mid- to low-latitude sub-surface waters (i.e., without the SO biological pump, oxygen is lower in these regions due to higher productivity). Since SO productivity and export is expected to change in response to climate change we also examine the role that these changes may play in future ocean deoxygenation. |
format |
Conference Object |
author |
Keller, David Oschlies, Andreas |
spellingShingle |
Keller, David Oschlies, Andreas Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
author_facet |
Keller, David Oschlies, Andreas |
author_sort |
Keller, David |
title |
Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
title_short |
Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
title_full |
Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
title_fullStr |
Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
title_full_unstemmed |
Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
title_sort |
investigating the role that the southern ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/22432/ https://oceanrep.geomar.de/id/eprint/22432/1/EUR-OCEANS_poster.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/22432/1/EUR-OCEANS_poster.pdf Keller, D. and Oschlies, A. (2013) Investigating the role that the Southern Ocean biological pump plays in determining global ocean oxygen concentrations and deoxygenation. [Poster] In: EUR-OCEANS Hot Topics Conference. , 6.-8.11.2013, Gran Canaria, Spain . |
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cc_by_nd |
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1766206163787972608 |