Isotopic composition of ice core air reveals abrupt Antarctic warming during and after Heinrich Event 1a

Jacob Davies Morgan1, Bernhard Bereiter2, Daniel Baggenstos2, Kenji Kawamura3, Sarah Shackleton1 and Jeffrey P Severinghaus4, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)Climate and Environmental Physics and Oeschger Center for Climate Research, University of Bern, Bern, Switzerland, (3)National Institute of Polar Research, Tokyo, Japan, (4)Scripps Institution of Oceanography, La Jolla, United States