| Project/Area Number |
13640432
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | HOKKAIDO UNIVERSITY |
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Principal Investigator |
SHIRAKAWA Takayuki Hokkaido Univ., Inst. Low Temp. Sci., Inst., 低温科学研究所, 助手 (90235739)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Noriyuki Frontier Research System for Global Change, International Arctic Research Center, IARC複合分野, グループリーダー (10261348)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Ice core / Climate change / DICE / PDO / Kamchatka / North Pacific / glacier model / glacier / カムチャツカ半島 / 火山 / 数値モデル / 動力学 |
|---|
| Research Abstract |
North Pacific DICE (Decadal and Interdecadal Climatic Event) was reconstructed from the analyses of 212 m-long ice core recovered at Ushkovsky Ice cap, Kamchatka, Russia. We developed analytical and numerical glacier-mechanical models in order to compensate the total strain so that we could reconstruct the 170-year time series of annual accumulation rates. Our spectral analysis showed that the acoumulation rates have spectra of 32.1, 12.2, 5.1 and 3.7 years. The time-series has clear negativc corrclation with so called PDO Index (Pacific Decadal Oscillations : Mantua et al., 1997). The results suggest that the accumulation rate changes in Kamchatka are strongly controlled by the atmospheric field covering the whole North Pacific Ocean.
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