Tarfala Research Station is located at 1130 m a.s.l. in the high alpine Kebnekaise mountains, northern Sweden. The Tarfala valley catchment reaches from 2100 to 500 m a.s.l. Vegetation spans high alpine flora, mountain heath and meadows and the upper mountain birch forest zone. The lake, rivers and glacier meltwater streams is part of the headwaters for the unregulated Kalix River. The station was established in 1946 with the main aim to study glacier massbalance. The best known glacier is Storglaciären which is one of the most well studied glaciers in the world. The glaciers and terrestrial and aquatic ecosystems formed by the harsch climate in this area is now changing rapidly. Over the years the environmental monitoring program has expanded and includes today mountain meteorology, water discharge and chemistry, permafrost and vegetation. The station belongs to Stockholm University and is part of the Swedish Infrastructure for Ecosystem Science (SITES).