2020 Summer School FORMON "Forest Monitoring to assess Forest Functioning under Air Pollution and Climate Change" taking place in Davos, Switzerland, on 23-29 August 2020. The 2020 Summer School FORMON is supported by ICP Forests, the SwissForestLab and the European Network for Forest Research and higher Education NFZ.forestnet. It aims to provide students an in-depth understanding of the concepts, approaches, and available data infrastructure of long-term forest monitoring. Students are particular encouraged to attend both the 9th ICP Forests Scientific Conference and the 2020 Summer School FORMON. They will receive a 50% discount on the conference and the post-conference excursion fees.