Correction to: Nature Geoscience https://doi.org/10.1038/s41561-018-0265-7, published online 30 November 2018.

In the version of this Article originally published, in the section ‘Defining endorheic regions’ in Methods, the sentence starting “These watersheds were aggregated…” contained the phrase “(~100,000 thousand km2)”; this should have read (~100,000 km2) and has now been amended.