 Global land evapotranspiration, ET, has been estimated using multiple data sources, such as satellite observations, in-situ measurements, and land surface models, LSMs. This paper presents a new synthesis product of global land ET, combining data from 40 different datasets. The results show that the global average ET is 493 millimeters per year, with a range of 460 to 527 millimeters per year. This value is lower than previous estimates, but still within the range of other studies. This article was authored by B. Mueller, M. Hershey, C. Jimenez, and others.