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Interannual 14C Variations During 1977–1998 Recorded in Coral from Daya Bay, South China Sea

Published online by Cambridge University Press:  18 July 2016

C D Shen ,
W X Yi ,
K F Yu ,
Y M Sun ,
Y Yang  and
B Zhou
C D Shen
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710054, China. Corresponding author. Email: cdshen@gig.ac.cn
W X Yi
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
K F Yu
Affiliation:
South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
Y M Sun
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
Y Yang
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
B Zhou
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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Abstract

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Twenty-two annually banded samples of coral from 1977 to 1998 were collected from Daya Bay, South China Sea, and bomb 14C concentrations were determined. The interannual variation of coral Δ14C is controlled mainly by oceanic factors. In ENSO years, the coastwise upwelling current of the South China Sea has been intensified; hence, the coral Δ14C displays its minimum value. The interannual variation curve of Δ14C in coral bears a relationship with the Southern Oscillation Index (SOI) curves: the correlation coefficient between Δ14C and (SOI)w is 0.43 and the correlation coefficient between Δ14C and (SOI)y is 0.27. The coral Δ14C has no remarkable response to the variation of solar radiation energy. In the past 20 yr or so, the general situation and oceanic thermal structure of the South China Sea are still stable even though interannual variations in atmosphere-sea interaction and upwelling current driven by the tropical energy have occurred.

Type
Part II
Information
Radiocarbon , Volume 46 , Issue 2: Proceedings of the 18th International Radiocarbon Conference (Part 2 of 2), Conference Editors: Nancy Beavan Athfield, Rodger J Sparks , 2004 , pp. 595 - 601
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona 

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