| Co-Investigator(Kenkyū-buntansha) |
本多 牧生 国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 上席技術研究員 (20359160)
三野 義尚 名古屋大学, 宇宙地球環境研究所, 助教 (20362303)
藤木 徹一 国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), 主任技術研究員 (30598248)
桑田 晃 国立研究開発法人水産研究・教育機構, 東北区水産研究所, グループ長 (40371794)
田所 和明 国立研究開発法人水産研究・教育機構, 東北区水産研究所, 主幹研究員 (70399575)
相田 真希 国立研究開発法人海洋研究開発機構, 地球環境部門(地球表層システム研究センター), グループリーダー代理 (90463091)
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| Budget Amount *help |
¥97,500,000 (Direct Cost: ¥75,000,000、Indirect Cost: ¥22,500,000)
Fiscal Year 2019: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2018: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
Fiscal Year 2017: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
Fiscal Year 2016: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
Fiscal Year 2015: ¥42,900,000 (Direct Cost: ¥33,000,000、Indirect Cost: ¥9,900,000)
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| Outline of Final Research Achievements |
Based on time-series observation with high time resolution at St. K2 in the subarctic western North Pacific, we succeeded to find the difference in seasonality of the early summer and fall phytoplankton blooms for the beginning and finishing factor of blooms associated with mixing process that had remained obscure. At St. KEO in the subtropical western North Pacific, cyclonic meso-scale eddies are important physical process to promote primary production and the cyclonic meso-scale eddies induced nutrients can explain the total 80% of annual new production at St. KEO. The long time series phytoplankton fluxes collected in the subarctic North Pacific indicated that subtropical assemblage abundances increased relatively as compared with subarctic assemblage abundances during the positive phase of Pacific Decadal Oscillation and ENSO cycles. It seems likely that the lower trophic level biological production in the North Pacific would be influenced by decadal scale climate changes.
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