Articles | Volume 16, issue 2
Clim. Past, 16, 597–610, 2020
https://doi.org/10.5194/cp-16-597-2020
Clim. Past, 16, 597–610, 2020
https://doi.org/10.5194/cp-16-597-2020

Research article 01 Apr 2020

Research article | 01 Apr 2020

Evidence from giant-clam δ18O of intense El Ninõ–Southern Oscillation-related variability but reduced frequency 3700 years ago

Yue Hu et al.

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Short summary
Tridacna, as the largest marine bivalves, can be used for high-resolution paleoclimate reconstruction in its carbonate skeleton. In this contribution, the modern δ18O shell is suggested to be a proxy for sea surface temperature in the Xisha Islands, South China Sea. Data from a fossil Tridacna (3673 ± 28 BP) indicate a warmer climate and intense ENSO-related variability but reduced ENSO frequency and more extreme El Niño winters compared to modern Tridacna.