… The prediction spread is larger in our calibration models because our compilation of global
core top data contains a wider range of uncertainty (eg, calcification depth, postdepositional …

… lowered temperatures would cause enrichment of 18O … standard error associated with the
calibration error. At the time of … The planktonic foraminifera species G. ruber forms throughout …

… uncertainty in reconstructed sea surface temperatures (SSTs). ‘… planktic foraminifera, we
calculated the average temperature … ’ temperature records, we measured the Δ 47 , δ 18 O and δ …

… to reconstruct ocean conditions, such as sea surface temperature, … -based Δ 47 data analyzed
on 14 species of planktonic … 3 uses the temperature at sea surface whenever the δ 18 O …

… annual sea surface temperatures (C) from the World 130 … the δ18O-derived reconstruction
at 8 Ma and a sea level of +… ” approach in the choice of temperature calibration improves 517 …

… δ 18 O and δ 13 C ratios of different species of foraminifera … values predicted from an inorganic
calibration. Inorganic values … The δ 18 O values of planktic and benthic foraminifera, and …

… to buoy plankton towards the sea surface. In order for organisms … equation, which is calibrated
for temperatures lower than … were combined with published δ 18 O isotope measurements …

… of surface-dwelling 18 planktic foraminifera Globigerinoides ruber … The analytical protocol
used for this 224 calibration closely … (δ18O) and clumped isotopic composition in planktic 280 …

… Similar to our analyses in depth space, at each data location, we identify the TP for each
species where the measured δ 18 O c matches the predicted δ 18 O c , iterating TP between 0 …

… -rich surface waters with modern sea surface temperatures (… seawater temperature estimations
and δ 18 O isotope (δ 18 … atmospheric and oceanographic regional settings. The Cap …