@article {2056,
	title = {Deglacial sea surface temperatures of the western tropical Pacific: A new look at old coral},
	journal = {Paleoceanography},
	volume = {19},
	year = {2004},
	note = {885czTimes Cited:30
Cited References Count:37
},
	month = {Dec 30},
	abstract = {Using Secondary Ion Mass Spectrometry ( SIMS) ion microprobe techniques, we generated annual Sr/Ca cycles with subweekly resolution from chunks of Porites coral retrieved from a Tahiti barrier reef drill core (149degreesW, 17degreesS), representing the period 13,650 to 13,100 years B.P. The centers of pristine skeletal septa were selectively targeted with a 10 mum diameter ion beam spot, avoiding adjacent pore spaces occupied by secondary aragonite needles. Applying a Sr/Ca-sea surface temperature (SST) calibration equation derived from modern Tahiti Porites having the same low growth rate as the fossil specimens, we obtained SSTs similar to0.5degrees-1.5degreesC cooler during the Bolling-Allerod relative to the present day, with no significant change in seasonality. On the contrary, we estimate that analysis of bulk samples would yield excessively cool Sr/Ca-based SST estimates due to the occupation by secondary aragonite crystals of up to 50\% of the skeletal pore space in the ancient samples. We find that growth rate effects on coral Sr/Ca further depress the apparent mean annual derived SSTs (by >3degreesC) and amplify the apparent seasonality by selectively enhancing wintertime cooling. Our microscale analysis of pristine skeleton and application of an appropriate growth-dependent calibration yield Sr/Ca-derived SSTs that are in good agreement with those derived from Mg/Ca ratios of calcitic foraminifera which indicate a continuous postglacial warming of the western tropical Pacific, in phase with the warming of the tropical Atlantic.},
	keywords = {bolling-allerod, climate-change, coral sr/ca, diagenesis, ion microprobe, last deglaciation, paleotemperature proxy, radiocarbon, record, sea surface temperature, sr/ca, strontium, symbiotic coral, trace-elements, tropical pacific},
	isbn = {0883-8305},
	doi = {10.1029/2004PA001084},
	author = {Cohen, A. L. and Hart, S. R.}
}
