Iron supply to the Southern Ocean mixed layer from below; the ocean model effect
In the Southern Ocean, iron plays a key role in limiting biological production. Studies of the iron supply to the surface mixed layer have traditionally focused on the aeolian and sediment contributions, but recent work has highlighted the importance of the vertical supply from below. We have perfor...
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ftawi:oai:epic.awi.de:37735 2024-09-15T18:35:31+00:00 Iron supply to the Southern Ocean mixed layer from below; the ocean model effect Schourup-Kristensen, Vibe Hauck, Judith Losch, Martin Wolf-Gladrow, Dieter Völker, Christoph 2015-03-24 application/pdf https://epic.awi.de/id/eprint/37735/ https://epic.awi.de/id/eprint/37735/1/Schourup.pdf https://hdl.handle.net/10013/epic.45387 https://hdl.handle.net/10013/epic.45387.d001 unknown https://epic.awi.de/id/eprint/37735/1/Schourup.pdf https://hdl.handle.net/10013/epic.45387.d001 Schourup-Kristensen, V. , Hauck, J. orcid:0000-0003-4723-9652 , Losch, M. orcid:0000-0002-3824-5244 , Wolf-Gladrow, D. orcid:0000-0001-9531-8668 and Völker, C. orcid:0000-0003-3032-114X (2015) Iron supply to the Southern Ocean mixed layer from below; the ocean model effect , 3rd International Symposium; Effects of Climate Change on the World's Oceans, Santos, Brazil, 23 March 2015 - 27 March 2015 . hdl:10013/epic.45387 EPIC33rd International Symposium; Effects of Climate Change on the World's Oceans, Santos, Brazil, 2015-03-23-2015-03-27 Conference notRev 2015 ftawi 2024-06-24T04:12:21Z In the Southern Ocean, iron plays a key role in limiting biological production. Studies of the iron supply to the surface mixed layer have traditionally focused on the aeolian and sediment contributions, but recent work has highlighted the importance of the vertical supply from below. We have performed a model study in which the biogeochemical model REcoM2 was coupled to two different ocean models, the Finite Element Sea-ice Ocean Model (FESOM) and the MIT general circulation model (MITgcm) and analyzed the magnitude of the iron sources from below in the two models. Our results revealed a remarkable difference in terms of mode and magnitude of transport; the mean iron supply from below in the Southern Ocean was on average four times higher in MITgcm than in FESOM. The dominant pathway was entrainment in MITgcm, whereas diffusion dominated in FESOM. We discuss how the difference in the depth and seasonal amplitude of the mixed layer between the models has a major effect on the vertical iron profile and thereby also on the iron fluxes. A further effect of the difference in supply is that the fraction of exported net primary production is higher in MITgcm than in FESOM, showing that the choice of ocean model has a significant impact on the modeled carbon cycle in the Southern Ocean, with possible implications for model runs predicting the future carbon uptake in the region. Conference Object Sea ice Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
In the Southern Ocean, iron plays a key role in limiting biological production. Studies of the iron supply to the surface mixed layer have traditionally focused on the aeolian and sediment contributions, but recent work has highlighted the importance of the vertical supply from below. We have performed a model study in which the biogeochemical model REcoM2 was coupled to two different ocean models, the Finite Element Sea-ice Ocean Model (FESOM) and the MIT general circulation model (MITgcm) and analyzed the magnitude of the iron sources from below in the two models. Our results revealed a remarkable difference in terms of mode and magnitude of transport; the mean iron supply from below in the Southern Ocean was on average four times higher in MITgcm than in FESOM. The dominant pathway was entrainment in MITgcm, whereas diffusion dominated in FESOM. We discuss how the difference in the depth and seasonal amplitude of the mixed layer between the models has a major effect on the vertical iron profile and thereby also on the iron fluxes. A further effect of the difference in supply is that the fraction of exported net primary production is higher in MITgcm than in FESOM, showing that the choice of ocean model has a significant impact on the modeled carbon cycle in the Southern Ocean, with possible implications for model runs predicting the future carbon uptake in the region. |
format |
Conference Object |
author |
Schourup-Kristensen, Vibe Hauck, Judith Losch, Martin Wolf-Gladrow, Dieter Völker, Christoph |
spellingShingle |
Schourup-Kristensen, Vibe Hauck, Judith Losch, Martin Wolf-Gladrow, Dieter Völker, Christoph Iron supply to the Southern Ocean mixed layer from below; the ocean model effect |
author_facet |
Schourup-Kristensen, Vibe Hauck, Judith Losch, Martin Wolf-Gladrow, Dieter Völker, Christoph |
author_sort |
Schourup-Kristensen, Vibe |
title |
Iron supply to the Southern Ocean mixed layer from below; the ocean model effect |
title_short |
Iron supply to the Southern Ocean mixed layer from below; the ocean model effect |
title_full |
Iron supply to the Southern Ocean mixed layer from below; the ocean model effect |
title_fullStr |
Iron supply to the Southern Ocean mixed layer from below; the ocean model effect |
title_full_unstemmed |
Iron supply to the Southern Ocean mixed layer from below; the ocean model effect |
title_sort |
iron supply to the southern ocean mixed layer from below; the ocean model effect |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/37735/ https://epic.awi.de/id/eprint/37735/1/Schourup.pdf https://hdl.handle.net/10013/epic.45387 https://hdl.handle.net/10013/epic.45387.d001 |
genre |
Sea ice Southern Ocean |
genre_facet |
Sea ice Southern Ocean |
op_source |
EPIC33rd International Symposium; Effects of Climate Change on the World's Oceans, Santos, Brazil, 2015-03-23-2015-03-27 |
op_relation |
https://epic.awi.de/id/eprint/37735/1/Schourup.pdf https://hdl.handle.net/10013/epic.45387.d001 Schourup-Kristensen, V. , Hauck, J. orcid:0000-0003-4723-9652 , Losch, M. orcid:0000-0002-3824-5244 , Wolf-Gladrow, D. orcid:0000-0001-9531-8668 and Völker, C. orcid:0000-0003-3032-114X (2015) Iron supply to the Southern Ocean mixed layer from below; the ocean model effect , 3rd International Symposium; Effects of Climate Change on the World's Oceans, Santos, Brazil, 23 March 2015 - 27 March 2015 . hdl:10013/epic.45387 |
_version_ |
1810478700669435904 |