View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by National Institute of Polar Research Repository Polar Meteorol. Glaciol., +3, +/ῌ,1, ,**/ ῍ ,**/ National Institute of Polar Research Spreading of Antarctic Bottom Water examined using the CFC-++ distribution simulated by an eddy-resolving OGCM Yoshikazu Sasai+ῌ, Akio Ishida+,,, Hideharu Sasaki-, Shintaro Kawahara-, Hitoshi Uehara- and Yasuhiro Yamanaka+,. + Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, -+1-ῌ,/, Showa-machi, Yokohama ,-0-***+ , Institute of Observational Research for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka ,-1-**0+ - Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, Yokohama ,-0-***+ . Graduate School of Environmental Science, Hokkaido University, Sapporo *0*-*2+* ῌCorresponding author. E-mail:
[email protected] (Received February ,/, ,**/; Accepted July ++, ,**/) Abstract: We have investigated the spreading and pathway of Antarctic Bottom Water (AABW) using the simulated distribution of chlorofluorocarbons (CFCs) in a global eddy-resolving (+/+*ῌ) OGCM. Our goal is understanding of the processes and pathways determining the distribution of CFCs in the Southern Ocean, where much of this tracer is entrained by formation of deepand bottom water. The simu- lated high CFC-++ water reveals the newly formed AABW around the Antarctic Continent. The main source regions of AABW in the model are in the Weddell Sea (0*ῌῌ-*ῌW), o#shore of Wilkes Land (+,*ῌῌ+0*ῌE) and in the Ross Sea (+1*ῌEῌ +0*ῌW). In our model, spreading of simulated CFC-++ in the deepSouthern Ocean from the newly formed AABW regions is more similar to the observed distribution than in coarse-resolution models.