Dome Fuji 720 kyr Stable Isotope Data and Site and Source Temperature Reconstructions 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. 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. Air Temperature Reconstruction earth science/paleoclimate/ice cores (deuterium excess,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,Deuterium excess based on linear definition. Data from Dome Fuji first core during 0-296052 yr BP (Uemura et al. 2012); Data from Dome Fuji second core during 296308-715892 yrBP (Uemura et al. 2018).) earth science/paleoclimate/ice cores (depth at sample start,null,null,meter,null,ice cores,null,null,N,Data from Dome fuji first core from 0 to 2401.91 m; Data from Dome Fuji second core from 2399.5m to 3035.025m. (There are apparent depth reversal at the connetion depth (around 2400 m) due to different drilling sites)) earth science/paleoclimate/ice cores (age,null,null,calendar year before present,null,ice cores,null,null,N,AICC 2012 age scale (Bazin et al. 2013)) earth science/paleoclimate/climate reconstructions|ice cores (temperature,delta 18O|delta 2H,null,degree Celsius,null,climate reconstructions|ice cores,null,null,N,Reconstructed temperature at the moisture source region Ocean using isotope modeling. Data from Dome Fuji first core during 0-296052 yr BP (Uemura et al. 2012); Data from Dome Fuji second core during 296308-715892 yrBP (Uemura et al. 2018).) earth science/paleoclimate/ice cores (delta 2H,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,Data from Dome Fuji first core during 0-296052 yr BP (Uemura et al. 2012); Data from Dome Fuji second core during 296308-715892 yrBP (Uemura et al. 2018).) earth science/paleoclimate/ice cores (deuterium excess,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,Deuterium excess based on logarithmic definition. Data from Dome Fuji first core during 0-296052 yr BP (Uemura et al. 2012); Data from Dome Fuji second core during 296308-715892 yrBP (Uemura et al. 2018).) earth science/paleoclimate/ice cores (depth at sample end,null,null,meter,null,ice cores,null,null,N,The same as Depth_top_m but for the depth at sample end.) earth science/paleoclimate/ice cores (delta 18O,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,Data from Dome Fuji first core during 0-296052 yr BP (Uemura et al. 2012); Data from Dome Fuji second core during 296308-715892 yrBP (Uemura et al. 2018).) earth science/paleoclimate/climate reconstructions|ice cores (temperature,delta 18O|delta 2H,null,degree Celsius,null,climate reconstructions|ice cores,null,null,N,Reconstructed air temperature at Dome Fuji site Antarctica using isotope modeling. Data from Dome Fuji first core during 0-296052 yr BP (Uemura et al. 2012); Data from Dome Fuji second core during 296308-715892 yrBP (Uemura et al. 2018).) earth science/paleoclimate/ice core earth science/paleoclimate/ice core earth science/paleoclimate/ice core (Dome Fuji>LATITUDE -77.32>LONGITUDE 38.7) A single isotope ratio (dD or d18O) of water is widely used as an air-temperature proxy in Antarctic ice core records. These isotope ratios, however, do not solely depend on air-temperature but also on the extent of distillation of heavy isotopes out of atmospheric water vapor from an oceanic moisture source to a precipitation site. The temperature changes at the oceanic moisture source (Delta Tsource) and at the precipitation site (Delta Tsite) can be retrieved by using deuterium-excess (d) data. A new d record from Dome Fuji, Antarctica spanning the past 360 000 yr is presented and compared with records from Vostok and EPICA Dome C ice cores. In previous studies, to retrieve Delta Tsource and Delta Tsite information, different linear regression equations were proposed using theoretical isotope distillation models. A major source of uncertainty lies in the coefficient of regression, Beta-site which is related to the sensitivity of d to Delta Tsite. We show that different ranges of temperature and selections of isotopic model outputs may increase the value of Beta-site by more than a factor of two. To explore the impacts of this coefficient on reconstructed temperatures, we apply for the first time the exact same methodology to the isotope records from the three Antarctica ice cores. We show that uncertainties in the Beta-site coefficient strongly affect (i) the glacial-interglacial magnitude of Delta Tsource; (ii) the imprint of obliquity in Delta Tsource and in the site-source temperature gradient. By contrast, we highlight the robustness of Delta Tsite reconstruction using water isotopes records. STUDY NOTES: Stable isotope (dD, d18O) data and site and source temperature reconstructions from the Dome Fuji 1st and 2nd ice cores for the past 720 kyr. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Uemura, R. Investigator : Motoyama, H. Investigator : Masson-Delmotte, V. Investigator : Jouzel, J. Investigator : Kawamura, K. Investigator : Goto-Azuma, K. Investigator : Fujita, S. Investigator : Kuramoto, T. Investigator : Hirabayashi, M. Investigator : Miyake, T. Investigator : Ohno, H. Investigator : Fujita, K. Investigator : Abe-Ouchi, A. Investigator : Iizuka, Y. Investigator : Horikawa, S. Investigator : Igarashi, M. Investigator : Suzuki, K. Investigator : Suzuki, T. Investigator : Fujii, Y. 2018-02-23 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/23371 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/domefuji/domefuji2018iso-temp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/domefuji/domefuji2018iso-temp.txt English https://www.ncdc.noaa.gov/paleo/study/23371 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/domefuji/domefuji2018iso-temp.txt Ryu Uemura, Hideaki Motoyama, Valérie Masson-Delmotte, Jean Jouzel, Kenji Kawamura, Kumiko Goto-Azuma, Shuji Fujita, Takayuki Kuramoto, Motohiro Hirabayashi, Takayuki Miyake, Hiroshi Ohno, Koji Fujita, Ayako Abe-Ouchi, Yoshinori Iizuka, Shinichiro Horikawa, Makoto Igarashi, Keisuke Suzuki, Toshitaka Suzuki, Yoshiyuki Fujii2018Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 yearsNature Communications961910.1038/s41467-018-03328-3https://www.nature.com/articles/s41467-018-03328-3 Uemura, R., V. Masson-Delmotte, J. Jouzel, A. Landais, H. Motoyama, and B. Stenni2012Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cyclesClimate of the Past81109-112510.5194/cp-8-1109-2012https://www.clim-past.net/8/1109/2012/ START YEAR: 715892 cal yr BP * END YEAR: -61 cal yr BP 38.7 -77.32 38.7 -77.32