Botsyun et al. (Research Articles, 1 March 2019, eaaq1436) have suggested that the Tibetan Plateau was low (substantially less than 3000 meters) during the Eocene, based on a comparison of oxygen isotope proxy data with isotope-enabled climate model simulations. However, we contend that their conclusions are flawed as the result of a number of failings of both the modeling and the data comparison.
Valdes, P. J., Lin, D., Farnsworth, A., Spicer, R. A., Li, S. H., & Tao, S. (2019). Comment on “Revised paleoaltimetry data show low Tibetan Plateau elevation during the Eocene”. Science, 365(6459), [eaax8474]. https://doi.org/10.1126/science.aax8474