| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
The magnitude of cooling of sea surface temperature(SST) during the last glacial maximum(LGM) in tropical to subtropical regions remains controversial. We conducted Sr/Ca andδ^<18> O measurements on a coral(Porites sp.) yielding a<230>^Th age of 22 ka that was retrieved from Vanuatu in the southwest Pacific. Our results indicated large, seasonal SST changes(~ 5℃), in particular, large cooling during the austral winter, at the LGM as compared to the present(<3℃). In addition, if the previously reported slight freshening around Vanuatu during the LGM is assumed, then a simple mathematical mass balance model indicates a decrease in the mean annual SST of 4. 5. 5℃.
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