Ocean heat content variability in the western tropical Pacific region through the Mid-Pleistocene climate transition
| Project/Area Number |
15K21221
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
Stratigraphy/Paleontology
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| Research Institution | Kanazawa University |
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Principal Investigator |
Sagawa Takuya 金沢大学, 自然システム学系, 助教 (40448395)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 熱帯太平洋 / 第四紀 / 古水温復元 / 浮遊性有孔虫 / 氷期－間氷期サイクル / 赤道太平洋暖水塊 / マグネシウム／カルシウム / 古海洋学 |
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| Outline of Final Research Achievements |
Calcification depth of planktonic foraminifera, Pulleniatina obliquiloculata, is estimated using sediment trap samples moored in the central and western equatorial Pacific. It is confirmed that Mg/Ca thermometry of this species is useful for reconstructing thermocline temperature in this regions. Past sea surface and thermocline temperatures were reconstructed by Mg/Ca thermometry of two planktonic foraminiferal species using a sediment core retrieved from the Ontong Java Plateau. Reconstructed temperatures showed glacial-interglacial change as well as variability in much longer timescale. The results suggest that the ocean-atmosphere interaction played significant role in long-term temperature regulation in the western tropical Pacific region.
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Report
(4 results)
Research Products
(9 results)
