A new ET product based on TCH method

We evaluates the uncertainty of three mainstream global ET products (ERA5-Land, GLDAS-Noah and MERRA-2) based on the three-cornered hat (TCH) method, and generate a new ET product based on this.The new product is a long series global monthly ET dataset with a spatial resolution of 0.25°×0.25° and a time span of 21 years (2002-2022) .