Spatial and temporal variations and budget of radiocesium in the ocean following the Fukushima Daiichi Nuclear Power Plant accident

(1) Central Research Institute of Electric Power Industry, Abiko, Japan (tsumune@criepi.denken.or.jp), (2) Meteorological Research Institute, Tsukuba, Japan, (3) Low Level Radioactivity Laboratory, Kanazawa University, Kanazawa, Japan, (4) Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan, (5) Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan, (6) Japan Atomic Energy Agency, Tokai-mura, Japan