Global Synthesis of Sea-Surface Temperature Trends During Marine Isotope Stage 11 - Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC) - page 14

(a)

(b) (c)

Fig. 1 a The location of stable isotope and SST data compiled in the project. b Scores of the rst
EOF with the 95 % con dence interval (age uncertainty set to 5 ka and temperature uncertainty set
to 1 C) compared to the Antarctic temperature change during MIS 11 (Jouzel et al. 2007 ), c Scores

of the second EOF with the 95 % con dence interval (age uncertainty set to 5 ka and temperature
uncertainty set to 1

°

13 C values of the North Atlantic used as a
proxy for North Atlantic Deepwater (NADW) production (see also Lisiecki et al. 2008 )

° C) compared to deep water mean

δ

3 Key Findings

The EOF analysis reveals two main SST modes (Fig. 1 b, c), which explain nearly
70 % of the variation in the dataset, with 49 % explained by EOF1 and * 18 %
explained by EOF2. Although we found a stronger in uence of temperature

uncertainty on the EOF robustness compared to the uncertainty of the age model
and reduction of number of records included into analysis, both the shape of the rst

two EOFs and the amount of variance explained by them are remarkably robust to
age-model and temperature uncertainties (Milker et al. 2013 ).