| Project/Area Number |
19310012
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokai University |
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Principal Investigator |
NARITA Hisashi Tokai University, 海洋学部, 教授 (50250501)
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| Co-Investigator(Kenkyū-buntansha) |
ZHANG Jing 富山大学, 大学院・理工学研究科, 教授 (20301822)
南川 雅男 北海道大学, 大学院・地球環境科学研究院, 教授 (10250507)
加藤 義久 東海大学, 海洋学部, 教授 (00152752)
西村 弥亜 東海大学, 海洋学部, 教授 (70167568)
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| Co-Investigator(Renkei-kenkyūsha) |
MINAGAWA Masao 北海道大学, 大学院・地球環境科学研究院, 教授 (10250507)
KATO Yoshihisa 東海大学, 海洋学部, 教授 (00152752)
NISHIMURA Mitsugu 東海大学, 海洋学部, 教授 (70167568)
JORDAN Richard 山形大学, 理学部, 准教授 (90260455)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2007: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
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| Keywords | 気候変動 / 湖底堆積物 / 温暖化 / 縄文海進 / 海水準変動 / 生物生産 / C-14年代 |
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| Research Abstract |
The annually laminated sediment cores were collected from the bottom of a coastal brackish lake, Lake Ogawara, Japan. The 20-m cores represent a continuous archive of palaeoenviromental information covering approximately the last 16,000 years. The inflow of seawater into Lake Ogawara since the last glaciation started from at least 10,000yr BP. The lake was filled with warm seawater around about 6,000yr BP, which is called the Jomon Transgression of Japan, corresponding to the global sea-level rise. Although the lake water changed to fresh after 6,000yr BP, the lake became brackish from 100~200yr BP until the present. The warm seawater, which filled Lake Ogawara around 6,000y BP, originated with the Tsushima Warm Current, the northward migration of this current increased the formation of intermediate water in the western North Pacific, comparison with the results of the marine sediment core collected off Shimikita in the western North Pacific.
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