Zackenberg Research Station (74º28’ N, 20º34’ W) is a Greenlandic research infrastructure in high arctic Northeast Greenland, 25 km northwest of the settlement Daneborg, a military outpost with twelve inhabitants. Zackenberg Research Station is operated by the Zackenberg Secretariat at the Department of Bioscience, Aarhus University. Access to the station and the designated research zones for any research project is given by Zackenberg Coordination Group on the basis of a proposal (Application form) describing aims and practicalities of the field research.Zackenberg Research Station provides accommodation facilities for 25 persons at a time. Besides, the station has several laboratories at disposal for guest scientists. The logistics staff can help with transport to/from Zackenberg and with transport in the local area. An unmanned branch facility in Daneborg is the base for marine projects in the Young Sund/Tyrolerfjord fjordsystem.The study area around Zackenberg is in the zone of continuous permafrost with an active layer thickness varying from 20 to 100 cm. A major geological flexure and thrust zone dissecting Zackenbergdalen (note: 'dalen'= 'the valley'), the core study area, separates Caledonian gneiss bedrock (to the west) from Cretaceous sandstones and Tertiary basalts (to the east). The margin of the Greenland Ice Sheet is located c. 60 km to the west of Zackenberg Research Station. The core study area was de-glaciated c. 8,000 years ago and it holds a great diversity of biotopes like ponds, fens, heaths, fell field plateaus and grassland.