Seminar 07 (September 25, 2024) of the CleanCloud series.
Speaker is Prof. Henrik Skov (Aarhus University in Denmark).
Abstract: The Arctic is heating 4 times faster than the rest of the world and thus Arctic is a sentinel for climate change. Aerosols and their interaction with clouds represent the largest uncertainty in the projections of climate forcing by ESMs. The high Arctic is characterised by large seasonal variations in the aerosol composition and sources. The winter is dominated by long range transport of anthropogenic pollution into the Arctic whereas the summer is characterised with in-situ aerosol formation. The response of Arctic aerosols to changing climate and to changing emissions from both natural and anthropogenic sources as well as changing transport patterns has been studied the last 50 years since the first pilots reported often observed reduced visibility in the Arctic; the so-called Arctic Haze phenomenon. In the presentation, some highlights on the last years’ progress in our understanding of Arctic aerosols and their properties e.g. towards clouds will be presented. Focus will be on the studies we have made at Villum Research Station combined with the use of atmospheric models and the long-term investigations will be put in relation to the intensive CleanCloud campaigns carried out this spring and summer at the Villum Research Station.
