Relation between subduction processes and surface-layer nutrient variations in the North Pacific subtropical gyre
Project/Area Number |
22540445
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Meteorology/Physical oceanography/Hydrology
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Research Institution | Tohoku University |
Principal Investigator |
SUGA Toshio 東北大学, 大学院・理学研究科, 教授 (70211977)
|
Project Period (FY) |
2010 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
Keywords | サブダクション / 亜熱帯循環 / 栄養塩 / 溶存酸素 / 有機物 / モード水 / Argo / 亜熱帯モード水 / 中央モード水 / 東部亜熱帯モード水 / 溶存態有機物 / 粒子状有機物 / プロファイリングフロート / 水塊 / 回帰線水 / 生物-物理モデル |
Research Abstract |
Based on the analyses of ocean climatology, repeat hydrography and the data from profiling floats equipped with oxygen sensors, variations of nutrient and dissolved oxygen along the advection path from the formation region of major water masses in the North Pacific are described. In particular, a vertical profile of time rate of dissolved-oxygen-concentration change in the area dominated by the subtropical mode water is revealed. Significant change in the subduction rate associated with the Pacific Decadal Oscillation is detected, with suggesting its influence on subsurface nutrient distribution.
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Report
(4 results)
Research Products
(34 results)
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[Presentation] Western North Pacific Integrated Physical-Biogeochemical Ocean Observation Experiment (INBOX):
Biogeochemical Impact of mesoscale disturbance2012
Author(s)
Suga, T., S. Hosoda, K. Sato, T. Kita, R. Inoue, S. Kouketsu, T. Kobayashi, F. Kobashi, K. Toyama, M. Honda, T. Kawano, T. Saino
Organizer
AGU Fall Meeting 2012
Place of Presentation
Moscone Center, San Francisco
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