Exploiting the synergy of recent airborne atmospheric observation campaigns in the European Arctic
We were pleased to have been able to gather 34 members of the research community to a four-day workshop where we jointly explored the synergy of atmospheric measurements from different aircraft that were used simultaneously during the (AC)3-HALO, ACAO, ISLAS, and (AC)3 Polar-5/6 field campaigns in the European Arctic in spring 2022. In addition, we want to enable exploiting the availability of airborne observations in other seasons, and over multiple years in sequence from the M-Phase campaign in October 2022, the MC2 campaign in 2023, the CAESAR campaign in 2024, and CELLO-ARCTIC in 2025.
Our goal with this workshop was to identify the potential for synergy and additional value from looking jointly at the state and processes of the European Arctic. Specific topics of interest included air mass transformation during CAOs and WAIs, remote-sensing and in-situ measurements of cloud properties from different aircraft, measurements of INPs, and others. We also explored the potential to identify Lagrangian matches between air masses measured by different aircraft. Results from airborne campaigns in other years and seasons may allow to assess the representativeness of individual flights. While the primary focus was on airborne measurements, interfacing part of the discussions was also devoted to interfacing with model evaluation and development work.
The workshop was organised as a sequence of plenary sessions with keynote presentations from the different campaigns, followed by discussions around specific flights that were either coordinated or took place simultaneously. Additional time was allocated to a poster session and several short talks. An icebreaker session and an excursion in the nearby mountains, and joint workshop dinner provided arenas for social interactions.
In addition for individual scientists to identify the potential for writing joint papers, we believe that this workshop provided a broader perspective on the unique airborne research activity in the European Arctic during recent years. A short perspective paper or workshop summary is now in the works, planned to be published in BAMS or similar.
Below we have made available the presentations from the different participants, and video recordings of all talk and the discussions in the plenum.
We thank the Research Council of Norway, as well as the Bjerknes Centre for Climate Research for their generous financial support of the workshop.
Organising committee:
Harald Sodemann, Geophysical institute, University of Bergen
Manfred Wendisch, University of Leipzig, Germany
Mario Mech, University of Cologne, Germany
Steven Abel, Met Office, UK
Paquita Zuidema, University of Miami, USA
Robert David, University of Oslo, Norway
Tim Carlsen, University of Oslo, Norway
Date: 1-4 June 2026
Location: University of Bergen / online via Teams
Workshop organisation
Download Book of Abstracts
Download Workshop programme
Programme (including slides and video recordings)
Monday, 1. June 2026
| Campaign overview talks | |
| Manfred Wendisch: HALO-AC(3) | [PDF] [Video] |
| Mario Mech: Polar 5 & Polar 6 | [PDF] [Video] |
| Steven Abel: ACAO | [PDF] [Video] |
| Harald Sodemann: ISLAS | [PDF1,PDF2] [Video] |
| Paquita Zuidema: CAESAR | [PDF1,PDF2] [Video] |
Tuesday, 2. June 2026
| Session 1: CAO transitions and dynamics | |
| Bart Geerts | [PDF1,PDF2] [Video] |
| Robert David | [PDF] [Video] |
| Yongjie Huang | [Video] |
| Session 2: Modelling needs | |
| Roel Neggers | [PDF] [Video] |
| Vera Schemann | [PDF] [Video] |
| Breakout discussions 1 | [Video] |
| CAO transitions and dynamics | |
| Modelling needs | |
| Session 3: Ice formation | |
| Ben Murray | [PDF] [Video] |
| Russell Perkins | [PDF] [Video] |
| Jonas Schäfer | [PDF] [Video] |
| Breakout discussions 2 | [Video] |
| Role of aerosols in cloud microphysics | |
| Ice-phase processes |
Wednesday, 3. June 2026
| Session 4: Remote sensing | |
| André Ehrlich | [PDF] [Video] |
| Georgios Dekoutsidis | [PDF] [Video] |
| Session 5: In-situ cloud microphysics | |
| Tim Carlsen | [PDF] [Video] |
| Aymeric Dziduch | [PDF] [Video] |
| Elise Rosky | [PDF] [Video] |
| Breakout discussions 3 | [Video] |
| Cloud microphysics and radiation | |
| In-situ and remote sensing | |
| Session 6: Multi-campaign connections | |
| Iris Thurnherr | [PDF] [Video] |
| Heiko Bozem | [PDF] [Video] |
| Breakout discussions 4 | |
| Lagrangian matching | |
| Multi-campaign statistics |
Thursday, 4. June 2026