Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition
The Southern Ocean is a major sink for anthropogenic carbon. Yet, there is no quantitative consensus about how this sink will change when surface winds increase (as they are anticipated to do). Among the tools employed to quantify carbon uptake are global coupled ocean-circulation–biogeochemical mod...
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2017
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00042539 2023-05-15T18:24:38+02:00 Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition Dietze, Heiner Getzlaff, Julia Löptien, Ulrike 2017-03 electronic https://doi.org/10.5194/bg-14-1561-2017 https://noa.gwlb.de/receive/cop_mods_00042539 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042159/bg-14-1561-2017.pdf https://bg.copernicus.org/articles/14/1561/2017/bg-14-1561-2017.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-14-1561-2017 https://noa.gwlb.de/receive/cop_mods_00042539 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042159/bg-14-1561-2017.pdf https://bg.copernicus.org/articles/14/1561/2017/bg-14-1561-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/bg-14-1561-2017 2022-02-08T22:41:01Z The Southern Ocean is a major sink for anthropogenic carbon. Yet, there is no quantitative consensus about how this sink will change when surface winds increase (as they are anticipated to do). Among the tools employed to quantify carbon uptake are global coupled ocean-circulation–biogeochemical models. Because of computational limitations these models still fail to resolve potentially important spatial scales. Instead, processes on these scales are parameterized. There is concern that deficiencies in these so-called eddy parameterizations might imprint incorrect sensitivities of projected oceanic carbon uptake. Here, we compare natural carbon uptake in the Southern Ocean simulated with contemporary eddy parameterizations. We find that very differing parameterizations yield surprisingly similar oceanic carbon in response to strengthening winds. In contrast, we find (in an additional simulation) that the carbon uptake does differ substantially when the supply of bioavailable iron is altered within its envelope of uncertainty. We conclude that a more comprehensive understanding of bioavailable iron dynamics will substantially reduce the uncertainty of model-based projections of oceanic carbon uptake. Article in Journal/Newspaper Southern Ocean Niedersächsisches Online-Archiv NOA Southern Ocean Biogeosciences 14 6 1561 1576 |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Dietze, Heiner Getzlaff, Julia Löptien, Ulrike Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition |
topic_facet |
article Verlagsveröffentlichung |
description |
The Southern Ocean is a major sink for anthropogenic carbon. Yet, there is no quantitative consensus about how this sink will change when surface winds increase (as they are anticipated to do). Among the tools employed to quantify carbon uptake are global coupled ocean-circulation–biogeochemical models. Because of computational limitations these models still fail to resolve potentially important spatial scales. Instead, processes on these scales are parameterized. There is concern that deficiencies in these so-called eddy parameterizations might imprint incorrect sensitivities of projected oceanic carbon uptake. Here, we compare natural carbon uptake in the Southern Ocean simulated with contemporary eddy parameterizations. We find that very differing parameterizations yield surprisingly similar oceanic carbon in response to strengthening winds. In contrast, we find (in an additional simulation) that the carbon uptake does differ substantially when the supply of bioavailable iron is altered within its envelope of uncertainty. We conclude that a more comprehensive understanding of bioavailable iron dynamics will substantially reduce the uncertainty of model-based projections of oceanic carbon uptake. |
format |
Article in Journal/Newspaper |
author |
Dietze, Heiner Getzlaff, Julia Löptien, Ulrike |
author_facet |
Dietze, Heiner Getzlaff, Julia Löptien, Ulrike |
author_sort |
Dietze, Heiner |
title |
Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition |
title_short |
Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition |
title_full |
Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition |
title_fullStr |
Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition |
title_full_unstemmed |
Simulating natural carbon sequestration in the Southern Ocean: on uncertainties associated with eddy parameterizations and iron deposition |
title_sort |
simulating natural carbon sequestration in the southern ocean: on uncertainties associated with eddy parameterizations and iron deposition |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-1561-2017 https://noa.gwlb.de/receive/cop_mods_00042539 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042159/bg-14-1561-2017.pdf https://bg.copernicus.org/articles/14/1561/2017/bg-14-1561-2017.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-14-1561-2017 https://noa.gwlb.de/receive/cop_mods_00042539 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00042159/bg-14-1561-2017.pdf https://bg.copernicus.org/articles/14/1561/2017/bg-14-1561-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-14-1561-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
6 |
container_start_page |
1561 |
op_container_end_page |
1576 |
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1766205367168008192 |