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121.
Makio C. Honda Masahide Wakita Kazuhiko Matsumoto Tetsuichi Fujiki Eko Siswanto Kosei Sasaoka Hajime Kawakami Yoshihisa Mino Chiho Sukigara Minoru Kitamura Yoshikazu Sasai Sherwood L. Smith Taketo Hashioka Chisato Yoshikawa Katsunori Kimoto Shuichi Watanabe Toru Kobari Toshi Nagata Koji Hamasaki Ryo Kaneko Mario Uchimiya Hideki Fukuda Osamu Abe Toshiro Saino 《Journal of Oceanography》2017,73(5):647-667
A comparative study of ecosystems and biogeochemistry at time-series stations in the subarctic gyre (K2) and subtropical region (S1) of the western North Pacific Ocean (K2S1 project) was conducted between 2010 and 2013 to collect essential data about the ecosystem and biological pump in each area and to provide a baseline of information for predicting changes in biologically mediated material cycles in the future. From seasonal chemical and biological observations, general oceanographic settings were verified and annual carbon budgets at both stations were determined. Annual mean of phytoplankton biomass and primary productivity at the oligotrophic station S1 were comparable to that at the eutrophic station K2. Based on chemical/physical observations and numerical simulations, the likely “missing nutrient source” was suggested to include regeneration, meso-scale eddy driven upwelling, meteorological events, and eolian inputs in addition to winter vertical mixing. Time-series observation of carbonate chemistry revealed that ocean acidification (OA) was ongoing at both stations, and that the rate of OA was faster at S1 than at K2 although OA at K2 is more critical for calcifying organisms. 相似文献