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Sea surface temperature variations recorded on coralline Sr/Ca ratios during Mid-Late Holocene in Leizhou Peninsula

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Abstract

High-resolution Sr/Ca ratios of twoPorites corals from Leizhou Peninsula were measured using inductively coupled plasma atomic spectrometry (ICP-AES). TIMS U-Th dating reveals that the life-spans of the two corals are 489–500 AD and 539-530 BC, respectively. Monthly sea surface temperatures (SSTs) during these two periods can be reconstructed from their skeletal Sr/Ca ratios. The results reveal that SSTs during 539-530 BC were roughly the same as those during 1990–2000 AD in this area, indicating a relative warm climate period. However, the period of 489–500 AD was significantly cooler, with annual mean SST, the 10-a average of minimum monthly winter SSTs and the 10-a average of maximum monthly summer SSTs being about 2, 2.9 and 1°C lower than that in the 1990s, respectively. Such climate patterns agree well with the phenological results recorded in the historic documents in other areas of China.

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Author information

Correspondence to Gangjian Wei.

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Wei, G., Yu, K. & Zhao, J. Sea surface temperature variations recorded on coralline Sr/Ca ratios during Mid-Late Holocene in Leizhou Peninsula. Chin.Sci.Bull. 49, 1876–1881 (2004). https://doi.org/10.1007/BF03183416

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Keywords

  • Porites coral
  • Sr/Ca ratio
  • sea surface temperature
  • South China Sea
  • Holocene