Millennial scale site and source temperatures variability in Antarctica over the past 700,000 years

Ryu UEMURA; Hideaki MOTOYAMA; FUJI ICE CORE RESEARCH GROUP, . DOME

Presentation information

Oral

Symbol A (Atmospheric and Hydrospheric Sciences) » A-CC Cryospheric Sciences & Cold District Environment

[A-CC29] Ice cores and past environmental changes

Tue. May 26, 2015 2:15 PM - 4:00 PM 301A (3F)

Convener:*Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Minoru Ikehara(Center for Advanced Marine Core Research, Kochi University), Nozomu Takeuchi(Chiba University), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo), Chair:Kenji Kawamura(National Institute of Polar Research, Research Organization of Information and Systems), Ayako Abe-Ouchi(Atmosphere and Ocean Research Institute, The University of Tokyo)

3:00 PM - 3:15 PM

[ACC29-04] Millennial scale site and source temperatures variability in Antarctica over the past 700,000 years

*Ryu UEMURA¹, Hideaki MOTOYAMA², FUJI ICE CORE RESEARCH GROUP, . DOME² (1.University of the Ryukyus, 2.National Institute of Polar Research)

Keywords:ice core, oxygen isotope, hydrogen isotope, d-excess, Antarctica

Deuterium-excess (d-excess = δD ? 8δ¹⁸O) provides the information on the ocean surface conditions in the moisture source for polar precipitation. We show a new d-excess record from the 3,035m-depth Dome Fuji ice core (DF2), which was obtained at the Dome Fuji station (77?19S, 39?42S, 3,810m a.s.l.). The new part of DF2 core (2400m to 3034m depth) extends back to 700ky BP with fine time-resolution. The ΔTsite and ΔTsource histories were reconstructed based on the d-excess data.