Warm Air Intrusion and Atmospheric River event opened the HALO-(AC)3 campaign

The goal of the HALO-(AC)³ campaign is to gain a better understanding of the air mass transformations within a Warm Air Intrusion (WAI) and Cold Air Outbreak (CAO). During a WAI, warm and moist air is transported into the Arctic. During a CAO cold and dry air is transported out of the Arctic.

On the 11^th of March, the research aircraft HALO from the German Airspace Centre arrived from Oberpfaffenhofen in Kiruna. HALO is able to fly at higher altitudes (up to 15km) and reach longer distances (up to 10 000km). Therefore, it is able to monitor these systems.