FN Archimer Export Format PT J TI Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years BT AF 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 AS 1:1;2:2,3;3:4;4:4;5:2,3;6:2,3;7:2,3;8:2;9:2,3;10:2;11:2;12:5;13:6,7;14:8;15:;16:9;17:10;18:11;19:2; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;17:;18:;19:; C1 Univ Ryukyus, Dept Chem Biol & Marine Sci, 1 Senbaru, Nishihara, Okinawa 9030213, Japan. Natl Inst Polar Res, Res Org Informat & Syst, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan. Grad Univ Adv Studies SOKENDAI, Dept Polar Sci, 10-3 Midori Cho, Tachikawa, Tokyo 1908518, Japan. Univ Paris Saclay, CEA CNRS UVSQ, Inst Pierre Simon Laplace, LSCE,UMR 8212, Gif Sur Yvette, France. Nagoya Univ, Grad Sch Environm Studies, Nagoya, Aichi 4648601, Japan. Univ Tokyo, Atmosphere & Ocean Res Inst, Kashiwa, Chiba 2778568, Japan. Japan Agcy Marine Earth Sci & Technol, Kanazawa Ku, 3173-25 Showamachi, Yokohama, Kanagawa 2360001, Japan. Hokkaido Univ, Inst Low Temp Sci, Kita Ku, North 19 West 8, Sapporo, Hokkaido 0600819, Japan. RIKEN, Nishina Ctr, Hirosawa 2-1, Wako, Saitama 3510198, Japan. Shinshu Univ, Dept Environm Sci, Asahi 3-1-1, Matsumoto, Nagano 3908621, Japan. Yamagata Univ, Dept Earth & Environm Sci, Kojirakawa 1-4-12, Yamagata 9908560, Japan. C2 UNIV RYUKYUS, JAPAN NIPR, JAPAN UNIV GRAD ADV STUDIES, JAPAN UNIV PARIS SACLAY, FRANCE UNIV NAGOYA, JAPAN UNIV TOKYO, JAPAN JAMSTEC, JAPAN UNIV HOKKAIDO, JAPAN RIKEN, JAPAN UNIV SHINSHU, JAPAN UNIV YAMAGATA, JAPAN IN DOAJ IF 11.878 TC 41 UR https://archimer.ifremer.fr/doc/00496/60788/64966.pdf https://archimer.ifremer.fr/doc/00496/60788/64967.pdf LA English DT Article CR MD 125 / SWIFT BIS-CARHOT NAUSICAA-IMAGES 2-MD105 VT 90 / SOUC BO Marion Dufresne AB 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. PY 2018 PD MAR SO Nature Communications SN 2041-1723 PU Nature Publishing Group VL 9 IS 961 UT 000426659300007 DI 10.1038/s41467-018-03328-3 ID 60788 ER EF