Fig. 3: Results from analysis of individual G. sacculifer from Central Equatorial Pacific cores PC17 and 14MC.
From: Modulation of late Pleistocene ENSO strength by the tropical Pacific thermocline
a Mixed layer temperature distributions normalized to interval medians. Each circle represents one individual foraminifera Mg/Ca temperature. Average analytical error of ±0.47 °C is shown by the gray vertical bar on the lower right. The Globigerinoides ruber δ18O stratigraphy for core 17PC is displayed with these intervals showing their location on the chronology53. b Mean 94th–98th quantile normalized temperature anomaly. Positive anomalies suggest enhanced El Niño amplitude, while negative anomalies indicate reduced El Niño amplitude. Gray error bars represent the combined ~1-sigma resampling and analytical uncertainties. c Median absolute deviation (MAD) for each sample interval. Vertical whiskers show the standard error of the MAD. Symbols on b and c depict sample Marine Isotope Stages (MIS): Blue intervals are glacial periods, orange intervals are interglacials. Holocene, ‘X’; MIS2-3, square; MIS5, circle; MIS6, triangle; MIS7, diamond; MIS8, inverted triangle. Filled symbols represent intervals that showed at least one ENSO-sensitive quantile suggesting either enhanced (up arrow) or reduced El Niño amplitude (down arrow) from quantile–quantile analysis.
