Pallas Cloud Experiment (PaCE 2022) took place in the subarctic region of Finnish Lapland between 12 September and 15 December 2022. The campaign was hosted by the Finnish Meteorological Institute (FMI) and utilized several different approaches to collect extensive datasets on atmospheric properties: a concurrent ground and airborne in situ approach and remote-sensing measurements. The intensive part of the campaign lasted 1 month, from 15 September to 15 October, and focused on vertical profiling of atmospheric properties. Several European institutes contributed to the PaCE campaign by deploying different instrumentation and platforms.
Sammaltunturi station (67°58' N, 24°07' E;560 m a.s.l.), a part of the Pallas Atmosphere–Ecosystem Supersite and Global Atmospheric Watch (GAW) programme, located 170 km north of the Arctic Circle, was utilized as a reference point for all measurements. Sammaltunturi station sits on top of a treeless hill (565 m a.s.l.) and is inside a cloud about 50 % of the time during autumn; thus, it is an ideal place for in situ cloud measurements. The station is equipped with various aerosol, cloud, reactive gas, and meteorology instrumentation. Additionally, a square of reserved airspace, TEMPO D area Pallas, with a side length of 14 km and a ceiling height of 2 km a.g.l. centred on Sammaltunturi station provided a safe playground for uncrewed airborne platforms. Remote-sensing instruments, namely a Doppler lidar HALO StreamLine XR (HALO Photonics), ceilometers (models CL31 and CL61, Vaisala Oyj), and a cloud radar (model RPG FMCW 94 GHz,RPG Radiometric Physics), were deployed around Kenttarova station (67°59' N, 24°14' E; 347 m a.s.l.).