SmartStake: an autonomous measurement station for high resolution glacier ablation monitoring Tracking the glacier mass loss along the melt season with sub-hourly time step and millimetric accuracy Argentière Glacier, French Alps Late summer 2019 continuous ablation monitoring at 2400 m a.s.l. SmartStake : Designed and validated by A. Rabatel & R. Biron - I.G.E., Grenoble CNRS / UGA / IRD / G-INP High temporal resolution monitoring User-defined time step (typical 15’) Battery powered Min. 2-years life High resolution meas. (<1cm) Up to 10-m cumulative ablation Light and compact Can be handled by a single person Direct and non-ambiguous measurement (automatic reel) Easy to install and set-up Internal data logger Winter resistant Wireless data transmission LoRa / LTE-M / 4G / SigFox GPS Snowfall height Temperature Humidity