2919 20160915110929.0 10.1002/2016GL070534 DOI SCART-2016-0016 Van Camp, Michel Direct measurement of evapotranspiration from a forest using a superconducting gravimeter 2016 Evapotranspiration (ET) controls the flux between the land surface and the atmosphere. Assessing the ET ecosystems remains a key challenge in hydrology. We have found that the ET water mass loss can be directly inferred from continuous gravity measurements: as water evaporates and transpires from terrestrial ecosystems, the mass distribution of water decreases, changing the gravity field. Using continuous superconducting gravity measurements, we were able to identify daily gravity changes at the level of, or smaller than 10^-9 nm.s-2 (or 10^-10 g) per day. This corresponds to 1.7 mm of water over an area of 50 ha. The strength of this method is its ability to enable a direct, traceable and continuous monitoring of actual ET for years at the mesoscale with a high accuracy. NO Evapotranspiration Deciduous forest Superconducting gravimeter Time variable gravity de Viron, Olivier Pajot-Métivier, Gwendoline Casenave, Fabien Watlet, Arnaud Dassargues, Alain Vanclooster, Marnik Geophysical Research Letters 43 2016 michel.vancamp@observatoire.be http://dx.doi.org/10.1002/2016GL070534 published in REFERD