Holocene sea surface temperature variations recorded in corals from Kikai Island, Japan

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Author(s)

Abstract

<p>Understanding seasonal to interannual characteristics of the climate during the transition from the "Holocene Optimum" (7.0–5.0 kyr BP) to mid-Holocene cold and dry period (4.6–4.0 kyr BP) is important since it is related to the evolution and collapse of human civilization in East Asia. To investigate those characteristics, we reconstructed a seasonal scale sea surface temperature (SST) and measured oxygen isotope ratios (δ<sup>18</sup>O) in seawater (δ<sup>18</sup>O<sub>seawater</sub>) using modern and fossil (4.9 kyr) corals from Kikai Island. Larger seasonal amplitudes observed among the reconstructed SST values and δ<sup>18</sup>O<sub>seawater</sub> change at 4.9 kyr suggest that the East Asian Monsoon (EAM) circulation might be stronger than the present-day. Our compiled coral records, along with the previous studies from Kikai Island, also suggest that the largest SST amplitude during the Holocene Optimum was recorded at 4.9 kyr and an abrupt cold climate shift occurred during the Holocene Optimum and the <i>Pulleniatina</i> Minimum Event (PME) in the north-western Pacific.</p>

Journal

  • GEOCHEMICAL JOURNAL

    GEOCHEMICAL JOURNAL 51(4), e9-e14, 2017

    GEOCHEMICAL SOCIETY OF JAPAN

Codes

  • NII Article ID (NAID)
    130005868330
  • NII NACSIS-CAT ID (NCID)
    AA00654975
  • Text Lang
    ENG
  • ISSN
    0016-7002
  • NDL Article ID
    028718978
  • NDL Call No.
    Z53-R488
  • Data Source
    NDL  J-STAGE 
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