Chinese Science Bulletin

, Volume 56, Issue 15, pp 1588–1595

Sea surface temperature records of core ZY2 from the central mud area in the South Yellow Sea during last 6200 years and related effect of the Yellow Sea Warm Current

Authors

  • LiBo Wang
    • Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and ResourcesQingdao Institute of Marine Geology
    • Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine GeosciencesOcean University of China
    • Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine GeosciencesOcean University of China
  • RongPing ZHang
    • Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical EngineeringOcean University of China
  • DeJiang Fan
    • Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine GeosciencesOcean University of China
  • MeiXun Zhao
    • Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical EngineeringOcean University of China
  • BangQi Hu
    • Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and ResourcesQingdao Institute of Marine Geology
    • Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine GeosciencesOcean University of China
Open AccessArticle Oceanology

DOI: 10.1007/s11434-011-4442-y

Cite this article as:
Wang, L., Yang, Z., ZHang, R. et al. Chin. Sci. Bull. (2011) 56: 1588. doi:10.1007/s11434-011-4442-y

Abstract

Sea surface temperature (SST) records in the South Yellow Sea during the last 6200 years are reconstructed by the unsaturation index of long-chain alkenones (U37K′) in sediment core ZY2 from the central mud area. The SST records varied between 14.1 and 16.5°C (15.6°C on average), with 3 phases: (1) A high SST phase at 6.2–5.9 cal ka BP; (2) A low and intensely fluctuating SST phase at 5.9–2.3 cal ka BP; and (3) A high and stable SST phase since 2.3 cal ka BP. Variation of the SST records is similar to intensity of the Kuroshio Current (KC), and corresponds well in time to global cold climate events. However, the amplitude of the SST response to cooling events was significantly different in different phases. The SST response to global cooling event was weak while the KC was strong; and the SST response was strong while the KC was weak. The difference in amplitude of the SST response is possibly caused by the modulation effect of the Yellow Sea Warm Current which acts as a shelf branch of the KC and a compensating current induced by the East Asia winter monsoon. The warm waters brought by the Yellow Sea Warm Current cushion the SST decrease induced by climate cooling, and both the Kuroshio and East Asian winter monsoon play important roles in the modulation mechanism. The SST records display a periodicity of 1482 years. The same period was found in the KC records, indicating that variation of the SST records in the central South Yellow Sea is strongly affected by KC intensity. The same period was also found in Greenland ice cores and North Atlantic and Arabian Sea sediment cores, showing a regional response of marine environmental variability in the East China Seas to that in the global oceans.

Keywords

South Yellow SeaU37K′sea surface temperatureYellow Sea Warm CurrentKuroshio Currentclimate change
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© The Author(s) 2011

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.