A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9
Marine biological production as well as the associated biotic uptake of carbon in many ocean regions depends on the availability of nutrients in the euphotic zone. While large areas are limited by nitrogen and/or phosphorus, the micronutrient iron is considered the main limiting nutrient in the Nort...
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ftoceanrep:oai:oceanrep.geomar.de:26426 2023-05-15T18:25:43+02:00 A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 Nickelsen, Levin Keller, David Oschlies, Andreas 2015-05-12 text archive https://oceanrep.geomar.de/id/eprint/26426/ https://oceanrep.geomar.de/id/eprint/26426/1/gmd-8-1357-2015.pdf https://oceanrep.geomar.de/id/eprint/26426/2/gmd-8-1357-2015-supplement.zip https://doi.org/10.5194/gmdd-7-8505-2014 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/26426/1/gmd-8-1357-2015.pdf https://oceanrep.geomar.de/id/eprint/26426/2/gmd-8-1357-2015-supplement.zip Nickelsen, L., Keller, D. and Oschlies, A. (2015) A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9. Open Access Geoscientific Model Development, 8 . pp. 1357-1381. DOI 10.5194/gmdd-7-8505-2014 <https://doi.org/10.5194/gmdd-7-8505-2014>. doi:10.5194/gmdd-7-8505-2014 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2015 ftoceanrep https://doi.org/10.5194/gmdd-7-8505-2014 2023-04-07T15:15:53Z Marine biological production as well as the associated biotic uptake of carbon in many ocean regions depends on the availability of nutrients in the euphotic zone. While large areas are limited by nitrogen and/or phosphorus, the micronutrient iron is considered the main limiting nutrient in the North Pacific, equatorial Pacific and Southern Ocean. Changes in iron availability via changes in atmospheric dust input are discussed to play an important role in glacial–interglacial cycles via climate feedbacks caused by changes in biological ocean carbon sequestration. Although many aspects of the iron cycle remain unknown, its incorporation into marine biogeochemical models is needed to test our current understanding and better constrain its role in the Earth system. In the University of Victoria Earth System Climate Model (UVic) iron limitation in the ocean was, until now, simulated pragmatically with an iron concentration masking scheme that did not allow a consistent interactive response to perturbations of ocean biogeochemistry or iron cycling sensitivity studies. Here, we replace the iron masking scheme with a dynamic iron cycle and compare the results to available observations and the previous marine biogeochemical model. Sensitivity studies are also conducted with the new model to test the sensitivity of the model to parameterized iron ligand concentrations, the importance of considering the variable solubility of iron in dust deposition, the importance of considering high-resolution bathymetry for the sediment release of iron, the effect of scaling the sedimentary iron release with temperature and the sensitivity of the iron cycle to a climate change scenario. Article in Journal/Newspaper Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Pacific Southern Ocean |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Marine biological production as well as the associated biotic uptake of carbon in many ocean regions depends on the availability of nutrients in the euphotic zone. While large areas are limited by nitrogen and/or phosphorus, the micronutrient iron is considered the main limiting nutrient in the North Pacific, equatorial Pacific and Southern Ocean. Changes in iron availability via changes in atmospheric dust input are discussed to play an important role in glacial–interglacial cycles via climate feedbacks caused by changes in biological ocean carbon sequestration. Although many aspects of the iron cycle remain unknown, its incorporation into marine biogeochemical models is needed to test our current understanding and better constrain its role in the Earth system. In the University of Victoria Earth System Climate Model (UVic) iron limitation in the ocean was, until now, simulated pragmatically with an iron concentration masking scheme that did not allow a consistent interactive response to perturbations of ocean biogeochemistry or iron cycling sensitivity studies. Here, we replace the iron masking scheme with a dynamic iron cycle and compare the results to available observations and the previous marine biogeochemical model. Sensitivity studies are also conducted with the new model to test the sensitivity of the model to parameterized iron ligand concentrations, the importance of considering the variable solubility of iron in dust deposition, the importance of considering high-resolution bathymetry for the sediment release of iron, the effect of scaling the sedimentary iron release with temperature and the sensitivity of the iron cycle to a climate change scenario. |
format |
Article in Journal/Newspaper |
author |
Nickelsen, Levin Keller, David Oschlies, Andreas |
spellingShingle |
Nickelsen, Levin Keller, David Oschlies, Andreas A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 |
author_facet |
Nickelsen, Levin Keller, David Oschlies, Andreas |
author_sort |
Nickelsen, Levin |
title |
A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 |
title_short |
A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 |
title_full |
A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 |
title_fullStr |
A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 |
title_full_unstemmed |
A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9 |
title_sort |
dynamic marine iron cycle module coupled to the university of victoria earth system model: the kiel marine biogeochemical model 2 for uvic 2.9 |
publisher |
Copernicus Publications (EGU) |
publishDate |
2015 |
url |
https://oceanrep.geomar.de/id/eprint/26426/ https://oceanrep.geomar.de/id/eprint/26426/1/gmd-8-1357-2015.pdf https://oceanrep.geomar.de/id/eprint/26426/2/gmd-8-1357-2015-supplement.zip https://doi.org/10.5194/gmdd-7-8505-2014 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/26426/1/gmd-8-1357-2015.pdf https://oceanrep.geomar.de/id/eprint/26426/2/gmd-8-1357-2015-supplement.zip Nickelsen, L., Keller, D. and Oschlies, A. (2015) A dynamic marine iron cycle module coupled to the University of Victoria Earth System Model: the Kiel Marine Biogeochemical Model 2 for UVic 2.9. Open Access Geoscientific Model Development, 8 . pp. 1357-1381. DOI 10.5194/gmdd-7-8505-2014 <https://doi.org/10.5194/gmdd-7-8505-2014>. doi:10.5194/gmdd-7-8505-2014 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/gmdd-7-8505-2014 |
_version_ |
1766207345572970496 |