The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1
We investigated the simulated iron budget in ocean surface waters in the 1990s and 2090s using the Community Earth System Model version 1 and the Representative Concentration Pathway 8.5 future CO2 emission scenario. We assumed that exogenous iron inputs did not change during the whole simulation pe...
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Copernicus Publications
2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00020788 2023-05-15T18:25:45+02:00 The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 Misumi, K. Lindsay, K. Moore, J. K. Doney, S. C. Bryan, F. O. Tsumune, D. Yoshida, Y. 2014-01 electronic https://doi.org/10.5194/bg-11-33-2014 https://noa.gwlb.de/receive/cop_mods_00020788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020743/bg-11-33-2014.pdf https://bg.copernicus.org/articles/11/33/2014/bg-11-33-2014.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-11-33-2014 https://noa.gwlb.de/receive/cop_mods_00020788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020743/bg-11-33-2014.pdf https://bg.copernicus.org/articles/11/33/2014/bg-11-33-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/bg-11-33-2014 2022-02-08T22:52:00Z We investigated the simulated iron budget in ocean surface waters in the 1990s and 2090s using the Community Earth System Model version 1 and the Representative Concentration Pathway 8.5 future CO2 emission scenario. We assumed that exogenous iron inputs did not change during the whole simulation period; thus, iron budget changes were attributed solely to changes in ocean circulation and mixing in response to projected global warming, and the resulting impacts on marine biogeochemistry. The model simulated the major features of ocean circulation and dissolved iron distribution for the present climate. Detailed iron budget analysis revealed that roughly 70% of the iron supplied to surface waters in high-nutrient, low-chlorophyll (HNLC) regions is contributed by ocean circulation and mixing processes, but the dominant supply mechanism differed by region: upwelling in the eastern equatorial Pacific and vertical mixing in the Southern Ocean. For the 2090s, our model projected an increased iron supply to HNLC waters, even though enhanced stratification was predicted to reduce iron entrainment from deeper waters. This unexpected result is attributed largely to changes in gyre-scale circulations that intensified the advective supply of iron to HNLC waters. The simulated primary and export production in the 2090s decreased globally by 6 and 13%, respectively, whereas in the HNLC regions, they increased by 11 and 6%, respectively. Roughly half of the elevated production could be attributed to the intensified iron supply. The projected ocean circulation and mixing changes are consistent with recent observations of responses to the warming climate and with other Coupled Model Intercomparison Project model projections. We conclude that future ocean circulation has the potential to increase iron supply to HNLC waters and will potentially buffer future reductions in ocean productivity. Article in Journal/Newspaper Southern Ocean Niedersächsisches Online-Archiv NOA Pacific Southern Ocean Biogeosciences 11 1 33 55 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Misumi, K. Lindsay, K. Moore, J. K. Doney, S. C. Bryan, F. O. Tsumune, D. Yoshida, Y. The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 |
topic_facet |
article Verlagsveröffentlichung |
description |
We investigated the simulated iron budget in ocean surface waters in the 1990s and 2090s using the Community Earth System Model version 1 and the Representative Concentration Pathway 8.5 future CO2 emission scenario. We assumed that exogenous iron inputs did not change during the whole simulation period; thus, iron budget changes were attributed solely to changes in ocean circulation and mixing in response to projected global warming, and the resulting impacts on marine biogeochemistry. The model simulated the major features of ocean circulation and dissolved iron distribution for the present climate. Detailed iron budget analysis revealed that roughly 70% of the iron supplied to surface waters in high-nutrient, low-chlorophyll (HNLC) regions is contributed by ocean circulation and mixing processes, but the dominant supply mechanism differed by region: upwelling in the eastern equatorial Pacific and vertical mixing in the Southern Ocean. For the 2090s, our model projected an increased iron supply to HNLC waters, even though enhanced stratification was predicted to reduce iron entrainment from deeper waters. This unexpected result is attributed largely to changes in gyre-scale circulations that intensified the advective supply of iron to HNLC waters. The simulated primary and export production in the 2090s decreased globally by 6 and 13%, respectively, whereas in the HNLC regions, they increased by 11 and 6%, respectively. Roughly half of the elevated production could be attributed to the intensified iron supply. The projected ocean circulation and mixing changes are consistent with recent observations of responses to the warming climate and with other Coupled Model Intercomparison Project model projections. We conclude that future ocean circulation has the potential to increase iron supply to HNLC waters and will potentially buffer future reductions in ocean productivity. |
format |
Article in Journal/Newspaper |
author |
Misumi, K. Lindsay, K. Moore, J. K. Doney, S. C. Bryan, F. O. Tsumune, D. Yoshida, Y. |
author_facet |
Misumi, K. Lindsay, K. Moore, J. K. Doney, S. C. Bryan, F. O. Tsumune, D. Yoshida, Y. |
author_sort |
Misumi, K. |
title |
The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 |
title_short |
The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 |
title_full |
The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 |
title_fullStr |
The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 |
title_full_unstemmed |
The iron budget in ocean surface waters in the 20th and 21st centuries: projections by the Community Earth System Model version 1 |
title_sort |
iron budget in ocean surface waters in the 20th and 21st centuries: projections by the community earth system model version 1 |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/bg-11-33-2014 https://noa.gwlb.de/receive/cop_mods_00020788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020743/bg-11-33-2014.pdf https://bg.copernicus.org/articles/11/33/2014/bg-11-33-2014.pdf |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific 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-11-33-2014 https://noa.gwlb.de/receive/cop_mods_00020788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00020743/bg-11-33-2014.pdf https://bg.copernicus.org/articles/11/33/2014/bg-11-33-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-11-33-2014 |
container_title |
Biogeosciences |
container_volume |
11 |
container_issue |
1 |
container_start_page |
33 |
op_container_end_page |
55 |
_version_ |
1766207391917932544 |