Extended Data Fig. 2: Paleoclimate records during HS1.
From: Bipolar impact and phasing of Heinrich-type climate variability
a, North Atlantic IRD from site U1308A (black; ref. 11). b, Cariaco Basin Sediment Reflectance (note reversed axis; teal; ref. 19). c, WD CH4 (green; ref. 17) and GISP2 CH4 (black; this study). d, GISP2 δ15N (modeled reconstruction in blue, data in black; this study). e, Speleothem composite of East Asian Monsoon strength (orange is raw data, black is 5-point running average; ref. 39). f, Summit δ18O (GISP2 and GRIP average, purple; ref. 48). g, Summit Ca2+ (black; ref. 38). h, 6-core Antarctic average δ18O (gold; refs. 9,49). i, North Atlantic stack (dark red) and Iberian Margin (dark blue) SST reconstruction transferred from GICC05 to BIC (ref. 36). j, Bermuda Rise 231Pa/230Th (blue squares50, teal circles37); The light blue bar denotes duration of Heinrich Stadial 1. Solid black line indicates timing of Heinrich Event 1 based on IRD and CH4. The vertical dark blue line is the midpoint of Greenland δ15N change at 18008 years BP, which is synchronous with the midpoint of cooling. The vertical gold line indicates the inflection of 6-core Antarctic δ18O stack identified by Breakfit81 at 17875 years BP.
