Supplementary figures Fig. S1.

Supplementary figures

Fig. S1. Example of comparison of alignment age-depth model and calibrated ¹⁴C ages………. p.1 Fig. S2. Example of Nordic Seas core dated by alignment of its magne=c suscep=bility record to the NGRIP ice δ¹⁸O record……… p.2 Fig. S3. Example of Brazilian margin core dated by combining ¹⁴C ages and alignment of its Ti/Ca record to El Condor cave δ¹⁸O record…. p.3

0 10 20 30 40 50

0 200 400 600 800 1000 1200 1400

Cal en dar ag e, k a

Depth, cm MD04-2845 median age 2019-05-24, ka

Alignment =e points

Median calibrated 14C age

Fig. S1. Example of comparison of alignment age-depth model and calibrated ¹⁴C ages. In blue: chosen alignment pointers and resul=ng age model computed by Undatable for core MD04-2845. Red crosses: calibrated ¹⁴C ages assuming no other change to the modern surface reservoir age than the one induced by changes in atmospheric pCO₂. Modelled ages must be smaller or equal to the laXer in order to avoid nega=ve surface reservoir ages.

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Fig. S2. Example of Nordic Seas core dated by alignment of its magne@c suscep@bility record to the NGRIP ice δ¹⁸O record. Top panel: magne=c suscep=bility of core MD95-2010⁶¹. Middle panel: same as top panel with da=ng error bars (68.27% confidence intervals). BoLom panel: NGRIP ice δ¹⁸O record on the GICC05 age scale⁵⁸. Grey bands highlight the Younger Dryas and Heinrich stadials 1-4 chronozones as defined in Table 2.

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-9 -7 -5 -3 -1 1 3 5

-70 -65 -60 -55 -50 -45 -40 -35

0 5 10 15 20 25 30 35 40 45 50 55 60

Age, ka

N G RIP δ

O , ‰ SMO W δ

O, ‰P DB

YD HS1 HS2 HS3 HS4 HS5

NGRIP δ

O

GeoB3910 ln(Ti/Ca)

ln (Ti/ Ca )

El Condor

Fig. S3. Example of Brasilian margin core dated by combining ¹⁴C ages and alignment of its Ti/Ca record to El Condor cave δ¹⁸O record.

Upper panel: NGRIP ice δ¹⁸O record on the GICC05 age scale⁵⁸. Middle panel: ln(Ti/Ca) record of core GeoB3910¹⁵², diamonds, squares and triangles underneath indicate calibrated ¹⁴C ages, alignment pointers to El Condor and NGRIP δ¹⁸O, respec=vely. BoLom panel: El Condor cave δ¹⁸O²⁵. Grey bands highlight the rainfall increases recognizable in both core GeoB3910 and El Condor cave records; hatched bands highlight the Younger Dryas and Heinrich stadials 1-4 chronozones.

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