An Automatic Weather Station directly setup on the glacier, completed by a network of ablation stakes (and probes), will allow to assess the amount of water available at the surface of the glacier, in the vicinity of the investigated area, at a high temporal resolution (hour) during the two 6-month campaigns. This will be done using an energy balance models driven by this dataset. The surface mass balance (accumulation and ablation) over the whole surface area of the glacier at a daily scale will be inferred using a combination of an enhanced degree day model and stakes measurements. Delphine Six is in charge of the AWS.