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    Exploring typhoon variability over the mid-to-late Holocene : evidence of extreme coastal flooding from Kamikoshiki, Japan

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    Woodruff_QSR2009.pdf (3.981Mb)
    Date
    2009-01
    Author
    Woodruff, Jonathan D.  Concept link
    Donnelly, Jeffrey P.  Concept link
    Okusu, Akiko  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/2988
    As published
    https://doi.org/10.1016/j.quascirev.2009.02.005
    Abstract
    Sediment cores from two coastal lakes located on the island of Kamikoshiki in southwestern Japan (Lake Namakoike and Lake Kaiike) provide evidence for the response of a backbarrier beach system to episodic coastal inundation over the last 6400 years. Subbottom seismic surveys exhibit acoustically laminated, parallel to subparallel seismic reflectors, intermittently truncated by erosional unconformities. Sediment cores collected from targeted depocenters in both lakes contain finely laminated organic mud interbedded with coarse grained units, with depths of coarse deposits concurrent with prominent seismic reflectors. The timing of the youngest deposit at Kamikoshiki correlates to the most recently documented breach in the barrier during a typhoon in 1951 AD. Assuming this modern deposit provides an analog for identifying past events, paleo typhoons may be reconstructed from layers exhibiting an increase in grain-size, a break in fine-scale stratigraphy, and elevated Sr concentrations. Periods of barrier breaching are concurrent with an increase in El Niño frequency, indicating that the El Niño/Southern Oscillation has potentially played a key role in governing typhoon variability during the mid-to-late Holocene. An inverse correlation is observed between tropical cyclone reconstructions from the western North Atlantic and the Kamikoshiki site, which may indicate an oscillating pattern in tropical cyclone activity between the western Northern Atlantic and the western North Pacific, or at least between the western Northern Atlantic and regions encompassing southern Japan. The two kamikaze typhoons which contributed to the failed Mongol invasions of Japan in 1274 AD and 1281 AD occur during a period with more frequent marine-sourced deposition at the site, suggesting the events took place during a period of greater regional typhoon activity.
    Description
    Author Posting. © Elsevier B.V., 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Quaternary Science Reviews 28 (2009): 1774-1785, doi:10.1016/j.quascirev.2009.02.005.
    Collections
    • Geology and Geophysics (G&G)
    Suggested Citation
    Preprint: Woodruff, Jonathan D., Donnelly, Jeffrey P., Okusu, Akiko, "Exploring typhoon variability over the mid-to-late Holocene : evidence of extreme coastal flooding from Kamikoshiki, Japan", 2009-01, https://doi.org/10.1016/j.quascirev.2009.02.005, https://hdl.handle.net/1912/2988
     
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