High resolution Sr/Ca profiles of three Tridacna specimens and their potential as sea surface temperature proxy

Three modern Tridacna specimens of different species were collected from Xisha Islands of South China Sea and the high-resolution Sr/Ca ratios of their inner shells were analyzed. Two Sr/Ca profiles of Tridacna （Tridacna gigas, Tridacna squamosa） display regular seasonal variations and close correlation with the instrumental sea surface temperature (SST) of the studied area. Four statistically significant models were proposed based on the linear regression of the Sr/Ca ratios (monthly or weekly values and extreme values) and the SST. These models could be used to reconstruct the SST of Holocene from the Sr/Ca ratio of Tridacnas inner shells.