Dome Fuji 720 kyr Oxygen Isotope (bandsaw chip) and Dust Data ...

• Main Authors: Kawamura, Kenji, Motoyama, Hideaki, Goto-Azuma, Kumiko, Uemura, Ryu, Oyabu, Ikumi, Project Members, Dome Fuji Ice Core
• Format: Dataset
• Language: English
• Published: Arctic Data archive System (ADS), Japan 2017
• Subjects: PALEOCLIMATE>ICE CORE RECORDS>ISOTOPES; PALEOCLIMATE>ICE CORE RECORDS>IONS; CRYOSPHERE>GLACIERS/ICE SHEETS>ICE SHEETS; CLIMATE INDICATORS>PALEOCLIMATE INDICATORS>ICE CORE RECORDS>IONS; CLIMATE INDICATORS>PALEOCLIMATE INDICATORS>ICE CORE RECORDS>ISOTOPES>OXYGEN ISOTOPES; Antarctic; Dome Fuji; East Antarctica; The Antarctic; Antarc*; Antarctica; ice core; North Atlantic; Sea ice
• Online Access: https://dx.doi.org/10.17592/001.2019121622; https://ads.nipr.ac.jp/dataset/A20191216-022

We investigate the long-term characteristics of climatic variability using a new ice-core record from Dome Fuji, East Antarctica, combined with an existing long record from the Dome C ice core. Antarctic warming events over the past 720,000 years are most frequent when the Antarctic temperature is slightly below average on orbital time scales, equivalent to an intermediate climate during glacial periods, whereas interglacial and fully glaciated climates are unfavourable for a millennial-scale bipolar seesaw. Numerical experiments using a fully coupled atmosphere-ocean general circulation model with freshwater hosing in the northern North Atlantic showed that climate becomes most unstable in intermediate glacial conditions associated with large changes in sea ice and the Atlantic Meridional Overturning Circulation. ...