Stable oxygen isotope record from Globigerina bulloides and sea surface temperature of sediment core BOFS31/1K (Table 1)

High-resolution SST records for the last 28 kyr have been produced using planktonic foraminiferal assemblages, based on the Imbrie-Kipp transfer function technique, and the UK' 37 index derived from abundances of C37 alkenones biosynthesized by prymnesiophyte algae.

Modern observations suggest that these indices reflect particular hydrographic conditions in the upper ocean: the UK? 37 index corresponds to the temperature at the time of maximum coccolith productivity, typically late spring-early summer in the study area today, whereas the faunal transfer function is calibrated for seasonal maximum and minimum temperatures. In general, the faunal and biomarker paleotemperature records display comparable SST variations during the last glacial and deglacial, but although the overall trends are similar, differences exist in the magnitude and timing of these temperature changes.