Correction to: Nature Geoscience https://doi.org/10.1038/s41561-020-0615-0, published online 3 August 2020.

In the version of this Article originally published, the text ‘regions with n > 70 were excluded’ in the caption of Fig. 5 was incorrect; it should have read ‘regions with n < 70 were excluded’. This has now been corrected.