Coordinated research activities were discussed at the Polar CORDEX meeting

The annual Polar CORDEX meeting took place in Utrecht, Netherlands on 4-6 October. 25 researchers from Europe, North America and Asia participated in this hybrid meeting. The aim of the meeting was to have scientific exchange of Polar CORDEX and related groups on ongoing research including presentations and discussions.

Climate Change. Iceberg afrom glacier in arctic nature landscape on Greenland. Icebergs in Ilulissat icefjord. famously affected by global warming.

During the final day plans for coordinated research activities were discussed. One of those activities is an evaluation of Arctic boundary layer stability regimes, their frequency and radiative and mechanical forcing using observations from the year-long MOSAiC expedition. A total of 12 modeling groups have indicated an interest in participating in this model intercomparison. The Cassano group at the University of Colorado will lead this intercomparison effort and presented initial results for the Coupled Arctic Forecast System (CAFS). Participating groups were encouraged to provide their model data by the end of 2023 with analysis of the multi-model ensemble set to begin in early 2024.

A further activity that will be undertaken during 2023/24 is to use a multi-model ensemble of regional atmospheric models to investigate a warm air intrusion event during April 15-16 2020 that was observed by the MOSAiC expedition. This study will have its focus on the boundary layer, air mass transformation, and surface energy budget, and aerosol-cloud-radiation interactions. This activity will be a joint effort between Polar CORDEX and the EU-funded project PolarRES. The models will include atmospheric chemistry-aerosol models.