| Budget Amount *help |
¥41,080,000 (Direct Cost: ¥31,600,000、Indirect Cost: ¥9,480,000)
Fiscal Year 2021: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2020: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2019: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2018: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2017: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Outline of Final Research Achievements |
To investigate the effect of Antarctic glacial melt on the global sea level rise and overturning circulation, we established an international observational array of oxygen isotope ratio, a special tracer which is indispensable in estimating the freshwater sources, and examined glacial meltwater fraction directly in the surrounding ocean. We identified regions of high meltwater fraction. Off Adelie Land Coast we detected an increase of meltwater fraction after the calving event of the glacial tongue after 2010. After mid-2010s, we observed a reversal of the long-term freshening tendency of the bottom layer in the Australian-Antarctic Basin, which could be attributed to a decrease in meltwater discharge in the West Antarctica. We detected poleward shift of the overall oceanic structure over the recent three decades in the same basin, which contributed to a comprehensive understanding of the spatio-temporal changes of the circum-Antarctic shelf ocean.
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