Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years
The delta D temperature proxy in Antarctic ice cores varies in parallel with CO2 through glacial cycles. However, these variables display a puzzling asynchrony. Well-dated records of Southern Ocean temperature will provide crucial information because the Southern Ocean is likely key in regulating CO...
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ftarchimer:oai:archimer.ifremer.fr:60788 2023-05-15T13:47:36+02:00 Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years Uemura, Ryu Motoyama, Hideaki Masson-delmotte, Valerie Jouzel, Jean Kawamura, Kenji Goto-azuma, Kumiko Fujita, Shuji Kuramoto, Takayuki Hirabayashi, Motohiro Miyake, Takayuki Ohno, Hiroshi Fujita, Koji Abe-ouchi, Ayako Iizuka, Yoshinori Horikawa, Shinichiro Igarashi, Makoto Suzuki, Keisuke Suzuki, Toshitaka Fujii, Yoshiyuki 2018-03 application/pdf https://archimer.ifremer.fr/doc/00496/60788/64966.pdf https://archimer.ifremer.fr/doc/00496/60788/64967.pdf https://doi.org/10.1038/s41467-018-03328-3 https://archimer.ifremer.fr/doc/00496/60788/ eng eng Nature Publishing Group https://archimer.ifremer.fr/doc/00496/60788/64966.pdf https://archimer.ifremer.fr/doc/00496/60788/64967.pdf doi:10.1038/s41467-018-03328-3 https://archimer.ifremer.fr/doc/00496/60788/ info:eu-repo/semantics/openAccess restricted use Nature Communications (2041-1723) (Nature Publishing Group), 2018-03 , Vol. 9 , N. 961 , P. 11 p. text Publication info:eu-repo/semantics/article 2018 ftarchimer https://doi.org/10.1038/s41467-018-03328-3 2021-09-23T20:32:46Z The delta D temperature proxy in Antarctic ice cores varies in parallel with CO2 through glacial cycles. However, these variables display a puzzling asynchrony. Well-dated records of Southern Ocean temperature will provide crucial information because the Southern Ocean is likely key in regulating CO2 variations. Here, we perform multiple isotopic analyses on an Antarctic ice core and estimate temperature variations at this site and in the oceanic moisture source over the past 720,000 years, which extend the longest records by 300,000 years. Antarctic temperature is affected by large variations in local insolation that are induced by obliquity. At the obliquity periodicity, the Antarctic and ocean temperatures lag annual mean insolation. Further, the magnitude of the phase lag is minimal during low eccentricity periods, suggesting that secular changes in the global carbon cycle and the ocean circulation modulate the phase relationship among temperatures, CO2 and insolation in the obliquity frequency band. Article in Journal/Newspaper Antarc* Antarctic ice core Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Southern Ocean The Antarctic Nature Communications 9 1 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
The delta D temperature proxy in Antarctic ice cores varies in parallel with CO2 through glacial cycles. However, these variables display a puzzling asynchrony. Well-dated records of Southern Ocean temperature will provide crucial information because the Southern Ocean is likely key in regulating CO2 variations. Here, we perform multiple isotopic analyses on an Antarctic ice core and estimate temperature variations at this site and in the oceanic moisture source over the past 720,000 years, which extend the longest records by 300,000 years. Antarctic temperature is affected by large variations in local insolation that are induced by obliquity. At the obliquity periodicity, the Antarctic and ocean temperatures lag annual mean insolation. Further, the magnitude of the phase lag is minimal during low eccentricity periods, suggesting that secular changes in the global carbon cycle and the ocean circulation modulate the phase relationship among temperatures, CO2 and insolation in the obliquity frequency band. |
format |
Article in Journal/Newspaper |
author |
Uemura, Ryu Motoyama, Hideaki Masson-delmotte, Valerie Jouzel, Jean Kawamura, Kenji Goto-azuma, Kumiko Fujita, Shuji Kuramoto, Takayuki Hirabayashi, Motohiro Miyake, Takayuki Ohno, Hiroshi Fujita, Koji Abe-ouchi, Ayako Iizuka, Yoshinori Horikawa, Shinichiro Igarashi, Makoto Suzuki, Keisuke Suzuki, Toshitaka Fujii, Yoshiyuki |
spellingShingle |
Uemura, Ryu Motoyama, Hideaki Masson-delmotte, Valerie Jouzel, Jean Kawamura, Kenji Goto-azuma, Kumiko Fujita, Shuji Kuramoto, Takayuki Hirabayashi, Motohiro Miyake, Takayuki Ohno, Hiroshi Fujita, Koji Abe-ouchi, Ayako Iizuka, Yoshinori Horikawa, Shinichiro Igarashi, Makoto Suzuki, Keisuke Suzuki, Toshitaka Fujii, Yoshiyuki Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years |
author_facet |
Uemura, Ryu Motoyama, Hideaki Masson-delmotte, Valerie Jouzel, Jean Kawamura, Kenji Goto-azuma, Kumiko Fujita, Shuji Kuramoto, Takayuki Hirabayashi, Motohiro Miyake, Takayuki Ohno, Hiroshi Fujita, Koji Abe-ouchi, Ayako Iizuka, Yoshinori Horikawa, Shinichiro Igarashi, Makoto Suzuki, Keisuke Suzuki, Toshitaka Fujii, Yoshiyuki |
author_sort |
Uemura, Ryu |
title |
Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years |
title_short |
Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years |
title_full |
Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years |
title_fullStr |
Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years |
title_full_unstemmed |
Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years |
title_sort |
asynchrony between antarctic temperature and co2 associated with obliquity over the past 720,000 years |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00496/60788/64966.pdf https://archimer.ifremer.fr/doc/00496/60788/64967.pdf https://doi.org/10.1038/s41467-018-03328-3 https://archimer.ifremer.fr/doc/00496/60788/ |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic ice core Southern Ocean |
genre_facet |
Antarc* Antarctic ice core Southern Ocean |
op_source |
Nature Communications (2041-1723) (Nature Publishing Group), 2018-03 , Vol. 9 , N. 961 , P. 11 p. |
op_relation |
https://archimer.ifremer.fr/doc/00496/60788/64966.pdf https://archimer.ifremer.fr/doc/00496/60788/64967.pdf doi:10.1038/s41467-018-03328-3 https://archimer.ifremer.fr/doc/00496/60788/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1038/s41467-018-03328-3 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766247506987974656 |