Two modes of change in Southern Ocean productivity over the past million years
Export of organic carbon from surface waters of the Antarctic Zone of the Southern Ocean decreased during the last ice age, coinciding with declining atmospheric carbon dioxide (CO2) concentrations, signaling reduced exchange of CO2 between the ocean interior and the atmosphere. In contrast, in the...
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American Association for the Advancement of Science
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D81835ZV 2023-05-15T13:41:09+02:00 Two modes of change in Southern Ocean productivity over the past million years Jaccard, S. L. Hayes, Christopher T. Martinez-Garcia, A. Hodell, D. A. Anderson, Robert F. Sigman, D. M. Haug, G. H. 2013 https://doi.org/10.7916/D81835ZV English eng American Association for the Advancement of Science https://doi.org/10.7916/D81835ZV Paleoclimatology Atmosphere Chemical oceanography Hydrology Articles 2013 ftcolumbiauniv https://doi.org/10.7916/D81835ZV 2019-04-04T08:13:22Z Export of organic carbon from surface waters of the Antarctic Zone of the Southern Ocean decreased during the last ice age, coinciding with declining atmospheric carbon dioxide (CO2) concentrations, signaling reduced exchange of CO2 between the ocean interior and the atmosphere. In contrast, in the Subantarctic Zone, export production increased into ice ages coinciding with rising dust fluxes, thus suggesting iron fertilization of subantarctic phytoplankton. Here, a new high-resolution productivity record from the Antarctic Zone is compiled with parallel subantarctic data over the past million years. Together, they fit the view that the combination of these two modes of Southern Ocean change determines the temporal structure of the glacial-interglacial atmospheric CO2 record, including during the interval of “lukewarm” interglacials between 450 and 800 thousand years ago. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Columbia University: Academic Commons Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Paleoclimatology Atmosphere Chemical oceanography Hydrology |
spellingShingle |
Paleoclimatology Atmosphere Chemical oceanography Hydrology Jaccard, S. L. Hayes, Christopher T. Martinez-Garcia, A. Hodell, D. A. Anderson, Robert F. Sigman, D. M. Haug, G. H. Two modes of change in Southern Ocean productivity over the past million years |
topic_facet |
Paleoclimatology Atmosphere Chemical oceanography Hydrology |
description |
Export of organic carbon from surface waters of the Antarctic Zone of the Southern Ocean decreased during the last ice age, coinciding with declining atmospheric carbon dioxide (CO2) concentrations, signaling reduced exchange of CO2 between the ocean interior and the atmosphere. In contrast, in the Subantarctic Zone, export production increased into ice ages coinciding with rising dust fluxes, thus suggesting iron fertilization of subantarctic phytoplankton. Here, a new high-resolution productivity record from the Antarctic Zone is compiled with parallel subantarctic data over the past million years. Together, they fit the view that the combination of these two modes of Southern Ocean change determines the temporal structure of the glacial-interglacial atmospheric CO2 record, including during the interval of “lukewarm” interglacials between 450 and 800 thousand years ago. |
format |
Article in Journal/Newspaper |
author |
Jaccard, S. L. Hayes, Christopher T. Martinez-Garcia, A. Hodell, D. A. Anderson, Robert F. Sigman, D. M. Haug, G. H. |
author_facet |
Jaccard, S. L. Hayes, Christopher T. Martinez-Garcia, A. Hodell, D. A. Anderson, Robert F. Sigman, D. M. Haug, G. H. |
author_sort |
Jaccard, S. L. |
title |
Two modes of change in Southern Ocean productivity over the past million years |
title_short |
Two modes of change in Southern Ocean productivity over the past million years |
title_full |
Two modes of change in Southern Ocean productivity over the past million years |
title_fullStr |
Two modes of change in Southern Ocean productivity over the past million years |
title_full_unstemmed |
Two modes of change in Southern Ocean productivity over the past million years |
title_sort |
two modes of change in southern ocean productivity over the past million years |
publisher |
American Association for the Advancement of Science |
publishDate |
2013 |
url |
https://doi.org/10.7916/D81835ZV |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://doi.org/10.7916/D81835ZV |
op_doi |
https://doi.org/10.7916/D81835ZV |
_version_ |
1766146109347987456 |