The project team came together on 17th to 19th March for its third General Assembly, hosted by Barcelona Super Computing Centre (BSC), Barcelona, Spain.
Invited guests and WP leaders presented at the hybrid meeting over the 3 days. The meeting was well attended, with 35 people in person and up to 15 online.
Day 1:
Núria Pérez-Zanón (BSC) and Patricia de Rosnay (ECMWF) opened the meeting and provided a warm welcome and introduction to the 3 days of presentations and discussions.
The Director of Copernicus Climate Change, Carlo Buontempo, (invited speaker) gave an overview of C3S activities and how the CERISE developments will benefit the C3S.

Rhona Phipps (ECMWF) then provided an update on the WP8 coordination workpackage and gave highlights from the RV3 review period before looking forward to the next reporting period tasks and deadlines.
WP1 Land DA results were presented by Pete Weston (ECMWF) Iris de Gelis (Estellus) and Asmund Bakketun.

This was then followed by the WP2 update; Coupled DA results, presented by Patricia de Rosnay (ECMWF), Christoph Herbert, (ECMWF) Jose Faundez (SMHI), Jelena Bojarova (SMHI) and Jostein Blyverket (Met Norway).

With the afternoon session complete, it was then time for posters. There were 8 posters presented by the project team:
Name | Institution | Poster title |
Monalisa Sahoo | BSC | Cerise class seasonal forecast data evaluation for land atmospheric coupling over European summer |
Lluís, Palma | BSC | An Explainable AI Assessment of Soil Moisture and Atmospheric Circulation as Drivers of Heat Extremes in Seasonal Predictions |
Nils Noll | DWD | Impact of LAI assimilation and nrt-available observation data on ICON-XPP |
Tim Stockdale on behalf of Retish Senan | ECMWF | Enhancing Subseasonal-to-Seasonal Predictability through Improved Snow Data Assimilation across High Mountain Asia. |
Emanuel Dutra | IPMA | Use of Land Surface Temperature to evaluate reanalysis |
Ibrahim, AL Khoury | Météo-France/CNRM | Integrating Land Use Dynamics into Regional Land Surface Reanalysis: Advancing CERRA-Land within the CERISE Project and Hydrological Evaluation with CTRIP |
Ekaterina, Vorobeva | NILU | Reliability of seasonal snow predictions in demonstrator versions |
Jelena on behalf of Mehdi Eshagh | SMHI | On inter-layer soil temperature and moisture interactions over CARRA-NE domain |

Day 2:
Day 2 continued with the remaining workpackage updates from the WP3, WP4, WP5, WP6 and WP7 teams.
WP3 initial conditions results were presented by Jean-Christophe Calvet (MF), Oscar Rojas-Munoz (MF) and Luis Gustavo De Concalves (CMCC))

Christoph Herbert (ECMWF) opened the WP4 presentation on behalf of Hans Herbach (ECMWF). Presentations from David Fairbairn (ECMWF), Ibrahim Al Khoury (MF), Harald Schyberg (Met Norway), Jelena Bojarova (SMHI) then followed.

Núria Pérez-Zanón (BSC) introduced the WP5 seasonal demonstrators status. This was then followed by presentations from Constantin Ardilouze (MF) Kristina Fröhlich (DWD), Giovanni Conti (CMCC), Jeff Knight (MetOffice) and Tim Stockdale (ECMWF)

The WP6 update was provided by Jeff Knight (Met Office UK), Frédéric Vitart online (ECMWF) and Ekaterina Vorobeva (NILU).

WP7 progress and plans was presented by Emanuel Dutra (IPMA), Amirpasha Mozaffari (BSC) and Margarita Choulga (ECMWF),

Our second invited speaker Anais Couanson (Deltares) then dialled in to give a presentation on the COMPASS project and explained how the CERISE project is assisting in the COMPASS Use Cases.

Day 2 ended with two breakout meetings; the first covering WP1, WP2 and WP4 and the second meeting for WP3 and WP5.
The project team came together for a self funded project dinner at Pomerada, a restaurant on the Passeig de Gracia in Barcelona. A very enjoyable evening was had enjoying Catalan dishes and catching up with the project team.

Day 3:
Day 3 started with a plenary session on WP6; discussing the interdependencies of WP6 with the other scientific workpackages ( 1-7), with highlight talks:
Hydrological seasonal forecast verification - Gabriel Narvaez (CNRM)
Land–atmosphere coupling analysis over the European summer - Monalisa Sahoo (BSC)
Atmospheric impacts of land-surface coupling – Tim Stockdale on behalf of Jonny Day (ECMWF)
The final sessions were the reports from the break out groups to plenary and next actions for the remaining 9 months of the project.
Patricia de Rosnay closed the meeting and gave our thanks to Nuria, Markus and BSC colleagues for hosting us at BSC premises and also for the excellent lunch on Wednesday.

Patricia de Rosnay states ” The CERISE General Assembly meeting was a great success, highlighting significant progress across the work packages and pointing toward further exciting results in the project’s final year. “
Our thanks go to all the presenters and all who contributed to the WP presentations to make this meeting a success, as well as to the local host at BSC for providing an excellent venue and outstanding organisation.
(A selection of photos across the 3 days is shown above. These are courtesy of the project team).