Measurement and modelling activities at Villum Research Station, Station Nord, since 1990 to present

In 1990 the predecessor to the Department of Environmental Science, Aarhus University initiated the first measuring activities at Station Nord, located in the Northern part of Greenland (81°36'N 16°40' W). The first activities were carried out in a small hut containing long-wave equipment, but in 1995 it was moved to a new hut, Flygers Hut. Finally in 2015 the activities moved to a new large research infrastructure, the Villum Research Station, Station Nord (VRS). In the beginning it was only filterpack measurements, but now the measurements have been expanded and many different advanced instruments are now used. In connection with the measurement activities, the development of the Danish Eulerian Hemispheric Model (DEHM) was initiated in 1991 as a relative simple 3-d air pollution model with linear Sulphur chemistry. The current version of DEHM is a much more complex model with Ozone-NOx-SOx-HC chemistry, PM species as Black Carbon and Organic Aerosols, “old” mercury chemistry (needs a major update) as well as Persistent Organic Pollutants. The model is driven by data from the Weather Research & Forecasting Model (WRF). In this presentation results from this unique measurement program (1990-present) and the associated model results (1979-present) will be presented. Acknowledgement. We highly acknowledge the Danish EPA with means from the MIKA/DANCEA funds, the Arctic Research Centre (ARC) and the VILLUM Foundation.