Geo-Marine Letters

, Volume 28, Issue 3, pp 131–136 | Cite as

Evidence for the 8,200 a b.p. cooling event in the middle Okinawa Trough

  • Hua Yu
  • Yingqian Xiong
  • Zhenxia Liu
  • Serge Berné
  • Chi-Yue Huang
  • Guodong Jia
Original

Abstract

Based on new and existing data on oxygen isotopes, alkenone-surface seawater temperature trends, planktonic foraminifers, lithology, and clay mineral composition of piston cores, a distinct cooling event has been identified around 8,200 cal a b.p. in the middle Okinawa Trough, northwest Pacific. This corresponds to the 8,200 a b.p. cooling event recorded in many places of the Northern Hemisphere. During this event, the local temperature decreased by 1°C, and the δ18O value increased by 0.6‰. A strengthened Asian winter monsoon is the most probable cause for this event, which thus adds further credibility to the contention that we are dealing here with a global phenomenon.

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Hua Yu
    • 1
  • Yingqian Xiong
    • 2
  • Zhenxia Liu
    • 3
  • Serge Berné
    • 4
  • Chi-Yue Huang
    • 5
  • Guodong Jia
    • 6
  1. 1.Department of Earth SciencesRice UniversityHoustonUSA
  2. 2.Department of GeosciencesUniversity of HoustonHoustonUSA
  3. 3.Marine Geology Division, The First Institute of OceanographySOAQingdaoChina
  4. 4.IFREMERGéosciences MarinesPlouzanéFrance
  5. 5.Department of Earth ScienceNational Cheng Kung UniversityTainanTaiwan
  6. 6.Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhouChina

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