To map the effects of climate change, mountain hydrologist Walter Immerzeel and his team venture to remote altitudes where other scientists do not go. From his tent base camp in the Himalayas, he collects data on precipitation, temperature, atmospheric pressure, solar irradiance, windspeed and more using over 200 measuring instruments.

These data must be extremely accurate in order to reliably predict changes in the region’s water cycle – which is of crucial importance for the millions of people who live in the climate-sensitive areas downstream. In Moving Mountains, filmmaker and mountaineer Renko Douze follows Immerzeel on one of his mountain expeditions.