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. Worldwide erosion rates seem to have increased strongly since the beginningof the Quaternary, but there is still discussion about the role of glaciationas a potential driver and even whether the increase is real at all or anartifact due to losses in the long-term sedimentary record. In this study wederive estimates of average erosion rates on the timescale of some tens ofmillions of years from the terrestrial impact crater inventory. This approachis completely independent from all other methods to infer erosion rates suchas river loads, preserved sediments, cosmogenic nuclides, andthermochronometry. Our approach yields average erosion rates as a function ofpresent-day topography and climate. The results confirm that topographyaccounts for the main part of the huge variation in erosion on Earth, butalso identifies a significant systematic dependence on climate in contrast toseveral previous studies. We found a 5-fold increase in erosional efficacyfrom the cold regimes to the tropical zone and that temperate and aridclimates are very similar in this context. Combining our resultsinto a worldwide mean erosion rate,we found that erosion rates on the timescale of some tens of millions ofyears are at least as high as present-day rates and suggest that glaciationhas a rather regional effect with a limited impact at the continental scale.

Long-term erosion rates as a function of climate derived from the impact crater inventory