Data Publications

Dome Fuji 720 kyr Stable Isotope Data and Site and Source Temperature Reconstructions

hasData_Center_Short_Name
  • JP/MEXT/NIPR
hasDataset_Online_Resource
hasProject_Long_Name
  • Japanese Antarctic Research Expedition
hasDataset_Release_Date
  • 2018
hasDataset_Title
  • Dome Fuji 720 kyr Stable Isotope Data and Site and Source Temperature Reconstructions
hasEntry_ID
  • A20180613-008
hasKeyword
  • oxygen isotopes
  • Dome Fuji
  • Ice Core
  • hydrogen isotopes
  • reconstruction
hasReference
  • 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 / Uemura, R., V. Masson-Delmotte, J. Jouzel, A. Landais, H. Motoyama, and B. Stenni. 2012. Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles. Climate of the Past, Vol. 8, No. 3, pp. 1109-1125. doi:10.5194/cp-8-1109-2012
hasSummary
  • 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.
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