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Abstract:
(1) Oceanographic surveys in the coastal region off Mombetsu, Hokkaido, the southern Okhotsk Sea, was carried out during sea-ice season using the icebreaker "Garinko-II" since 2009. Routine observations were CTD casts, Chl.a, nutrients, phytoplankton sampling, plankton nets, and primary production.(2) Oceanographic monitoring in the Mombetsu Port, Hokkaido, the southern Okhotsk Sea, was continued at 2-7 days intervals. Routine observations were CTD casts, Chl.a, nutrients, and plankton nets.