Data Summary

Dome Fuji 720 kyr Stable Isotope Data and Site and Source Temperature Reconstructions
Supplement to : Uemura, R.; Motoyama, H.; Masson-Delmotte, V.; Jouzel, J.; Kawamura, K. ; Goto-Azuma, K.; Fujita, S.; Kuramoto, T.; Hirabayashi, M.; Miyake, T.; Ohno, H.; Fujita, K.; Abe-Ouchi, A.; Iizuka, Y.; Horikawa, S.; Igarashi, M.; Suzuki, K.; Suzuki, T.; Fujii, Y. 2018, Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years. Nature Communicationsvolume 9, Article number: 961, doi:10.1038/s41467-018-03328-3

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    Summary

  • The dD 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.

    Dataset citation

  • Uemura, R., H. Motoyama, V. Delmotte, J. Jouzel, K. Kawamura, K. Goto-Azuma, S. Fujita, T. Kuramoto, M. Hirabayashi, T. Miyake, H. Ohno, K. Fujita, A. Abe-Ouchi, Y. Iizuka, S. Horikawa, M. Igarashi, K. Suzuki, T. Suzuki, Y. Fujii, 2018, Dome Fuji 720 kyr Stable Isotope Data and Site and Source Temperature Reconstructions, 1.00, Arctic Data archive System (ADS), Japan, https://ads.nipr.ac.jp/dataset/A20180613-008

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    Spatial coverage

  • N:  -77.32°   S:  -77.32°   E:  38.7°   W:  38.7°  

    Temporal coverage

  • 2018-02-23   -   2018-02-23

    License

  •  CC BY 4.0

DATA CONTORIBUTOR & GROUP

  • Ryu Uemura
    (University of the Ryukyus)
  • Hideki Motoyama
    (National Institute of Polar Research)
  • V. Delmotte
    (LSCE/IPSL)
  • J. Jouzel
    (LSCE/IPSL)
  • Kenji Kawamura
    (National Institute of Polar Research)
  • Kumiko Goto-Azuma
    (National Institute of Polar Research)
  • Shuji Fujita
    (National Institute of Polar Research)
  • Takayuki Kuramoto
    (National Institute of Polar Research)
  • Morihiro Hirabayashi
    (National Institute of Polar Research)
  • Takayuki Miyake
    (National Institute of Polar Research)
  • Hiroshi Ohno
    (National Institute of Polar Research)
  • Koji Fujita
    (Nagoya University)
  • Ayako Abe-Ouchi
    (The University of Tokyo)
  • Yoshinori Iizuka
    (Hokkaido University)
  • Shinichiro Horikawa
    (Hokkaido University)
  • Makoto Igarashi
    (RIKEN)
  • Keisuke Suzuki
    (Shinshu University)
  • Toshitaka Suzuki
    (Yamagata University)
  • Yoshiyuki Fujii
    (National Institute of Polar Research)

PARAMETERS

  • ISOTOPES

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