| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2013: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2012: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
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| Outline of Final Research Achievements |
We observed vertical and horizontal mixing and diffusion in the Southern Ocean. Expendable Microstructure Profilers suffered from noise and premature termination possibly due to optical fibre and yielded limited data. Drift and hydrographic data from Argo floats demonstrated spatial distribution of two quantities; horizontal eddy transport in the upper 1000 m and vertical propagation of eastward momentum through the water column carried by eddy topography interaction. For the former, strong poleward transport (spreading of Sub-Antarctic Mode Water and Antarctic Intermediate Water) was found in the South Indian Ocean. For the latter, the momentum transfer is limited to several spots where the Antarctic Circumpolar Current negotiates topographic obstacles despite large spatial scales of momentum input by westerly wind.
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