Nature 554, 356–359 (2018); doi:https://doi.org/10.1038/nature25454

In this Letter, in the legend of Fig. 3, “Red and green shading” has been corrected to “Green and red shading”. In the Methods subsection ‘Potential effect of ecological adaption and bioturbational mixing on marine variance ratios’, the phrase “alkenone-based (nine sites) and the Mg/Ca of planktic foraminifera G. ruber (six sites)” has been corrected to “alkenone-based (eight sites) and the Mg/Ca of planktic foraminifera G. ruber (seven sites)”. The original Letter has been corrected online.