Iron Fertilization of the Subantarctic Ocean During the Last Ice Age
Productive Dustiness The idea that biological productivity in the surface ocean is limited by a lack of available iron has been widely accepted, but it has been difficult to show that this effect might have operated in the geological past. Martínez-García et al. (p. 1347 ) investigated the isotopic...
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craaas:10.1126/science.1246848 2024-06-23T07:56:55+00:00 Iron Fertilization of the Subantarctic Ocean During the Last Ice Age Martínez-García, Alfredo Sigman, Daniel M. Ren, Haojia Anderson, Robert F. Straub, Marietta Hodell, David A. Jaccard, Samuel L. Eglinton, Timothy I. Haug, Gerald H. 2014 http://dx.doi.org/10.1126/science.1246848 https://www.science.org/doi/pdf/10.1126/science.1246848 en eng American Association for the Advancement of Science (AAAS) Science volume 343, issue 6177, page 1347-1350 ISSN 0036-8075 1095-9203 journal-article 2014 craaas https://doi.org/10.1126/science.1246848 2024-06-13T04:01:19Z Productive Dustiness The idea that biological productivity in the surface ocean is limited by a lack of available iron has been widely accepted, but it has been difficult to show that this effect might have operated in the geological past. Martínez-García et al. (p. 1347 ) investigated the isotopic composition of foraminifera-bound nitrogen in samples from an Ocean Drilling Project sediment core and found millennial-scale changes in nitrate consumption correlated with fluxes in the iron burial and productivity proxies over the past 160,000 years. Hence, in the Southern Ocean the biological pump was strengthened when dust fluxes were high, which explains a significant part of the difference in atmospheric CO 2 concentrations observed to occur across glacial cycles. Article in Journal/Newspaper Southern Ocean AAAS Resource Center (American Association for the Advancement of Science) Martínez ENVELOPE(-62.183,-62.183,-64.650,-64.650) Southern Ocean Science 343 6177 1347 1350 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
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craaas |
language |
English |
description |
Productive Dustiness The idea that biological productivity in the surface ocean is limited by a lack of available iron has been widely accepted, but it has been difficult to show that this effect might have operated in the geological past. Martínez-García et al. (p. 1347 ) investigated the isotopic composition of foraminifera-bound nitrogen in samples from an Ocean Drilling Project sediment core and found millennial-scale changes in nitrate consumption correlated with fluxes in the iron burial and productivity proxies over the past 160,000 years. Hence, in the Southern Ocean the biological pump was strengthened when dust fluxes were high, which explains a significant part of the difference in atmospheric CO 2 concentrations observed to occur across glacial cycles. |
format |
Article in Journal/Newspaper |
author |
Martínez-García, Alfredo Sigman, Daniel M. Ren, Haojia Anderson, Robert F. Straub, Marietta Hodell, David A. Jaccard, Samuel L. Eglinton, Timothy I. Haug, Gerald H. |
spellingShingle |
Martínez-García, Alfredo Sigman, Daniel M. Ren, Haojia Anderson, Robert F. Straub, Marietta Hodell, David A. Jaccard, Samuel L. Eglinton, Timothy I. Haug, Gerald H. Iron Fertilization of the Subantarctic Ocean During the Last Ice Age |
author_facet |
Martínez-García, Alfredo Sigman, Daniel M. Ren, Haojia Anderson, Robert F. Straub, Marietta Hodell, David A. Jaccard, Samuel L. Eglinton, Timothy I. Haug, Gerald H. |
author_sort |
Martínez-García, Alfredo |
title |
Iron Fertilization of the Subantarctic Ocean During the Last Ice Age |
title_short |
Iron Fertilization of the Subantarctic Ocean During the Last Ice Age |
title_full |
Iron Fertilization of the Subantarctic Ocean During the Last Ice Age |
title_fullStr |
Iron Fertilization of the Subantarctic Ocean During the Last Ice Age |
title_full_unstemmed |
Iron Fertilization of the Subantarctic Ocean During the Last Ice Age |
title_sort |
iron fertilization of the subantarctic ocean during the last ice age |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2014 |
url |
http://dx.doi.org/10.1126/science.1246848 https://www.science.org/doi/pdf/10.1126/science.1246848 |
long_lat |
ENVELOPE(-62.183,-62.183,-64.650,-64.650) |
geographic |
Martínez Southern Ocean |
geographic_facet |
Martínez Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Science volume 343, issue 6177, page 1347-1350 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.1246848 |
container_title |
Science |
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343 |
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6177 |
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1347 |
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1350 |
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1802650313629368320 |