By the middle of the century the Arctic Ocean may be open water during summer, even with moderate CO₂ emissions.

Hi everyone, We will have our next Stormtracks group meeting on Wednesday (24.09), from 13:00 to 14:00 at U105. Next week, Dave Schneider from CIRES, CU Boulder will present his work titled “Observed and modelled trends in Southern Hemisphere winds and ocean warming (with ice cores! and snow!)” The meeting will be hybrid and here is the zoom link for those who want to join remotely: https://uib.zoom.us/j/62886269543?pwd=ajWbi97zr0hbniaoQdZkUtD2EUSSri.1 Meeting ID: 628 8626 9543; Password: qSKTfKU3 If anyone would like to meet him, he will be around on Wednesday and Thursday next week. The meeting schedule for this semester is in the following google doc. Please do fill in a slot when you would like to speak. We have a few open slots. Ongoing works are most encouraged! https://docs.google.com/document/d/1yjicxkFp_8Y17LVftgksb1SnqSUSUXogg0pOFZfbK0g/edit?usp=sharing Have a nice weekend and see you all there next week! :) Cheers, ~Hari and Yangfan

Bjerknes Annual Meeting (BAM) Monday 29th of September 2025 Venue: Scandic Bergen City, Håkonsgaten 2-7 Main theme: Science for Society 08:00 09:00 Registration and coffee 09:00 09:10 Welcome and introduction to BAM by Director Kikki Kleiven How do we interact with society? Examples from the four research themes 09:10 09:40 How the Global research theme interact with society “From data to decisions: navigating usable climate services” Talk by Jesse Schrage on seasonal forecasts and climate services in Eastern Africa (ARCS and ACACIA project) 09:40 10:10 How the Polar research theme interact with society “Science & Society –The Greenland Sessions” Talk by Lars Henrik Smedsrud from Climate Narratives 10:10 10:30 Coffee break 10:30 11:00 How the Hazards research theme interacts with society “Boosting impact through societal engagement: Examples from Vestland County". Talk by Marie Pontoppidan "Estimating future runoff in ungauged catchments in Norway using machine learning". Talk by Kamilla Wergeland 11:10 11:40 How the Carbon research theme interacts with society “How, why, and to what avail? A travel log from my journey into the [sometimes murky waters of the] science-policy interface” Talk by Vigdis Vandvik 11:45 12:30 Lunch How to make our strategy relevant for Bjerknes members and society? 12:30 12:45 Results of the Bjerknes Centre internal perception mapping presented by Gudrun Sylte 12:45 13:00 President of the European Academies` Science Advisory Council (EASAC) Lise Øvreås on the role of science in policymaking, science diplomacy and how to get politicians to "care" about science, and how to build trust between science/researchers and politicians. 13:00 13:30 Break-out groups Science for society 13:30 14:00 Invited talk by Professor Thomas Jung on The Future of Climate Modelling: Emerging Directions 14:00 14:35 Coffee break 14:35 14:50 Climate Futures at mid-term by Iselin Medhaug 14:50 15:05 Scandinavian Centre for Mountains in Transition by Jostein Bakke 15:05 15:20 Presentation of the new national research school Climate-Informed by Lea Svendsen 15:25 15:45 Speed presentations of posters 15:45 17:45 Poster session 18:00 Dinner

Bjerknes Climate Prediction Unit Annual meeting 2025 Time: 10:00 – 15:50 Place: In person: Bjerknes lecture room 4020 (Jahnebakken 5, top floor) Online: Zoom Program: 10:00 – 10:10 Welcome and brief introduction, Noel Keenlyside (UiB & BCCR) Research Area 1: Mechanisms leading to climate predictability 10:10 – 10:40 Research Area 1: Summary and discussion, Nour-Eddine Omrani (UiB & BCCR) 10:40 – 11:10 Speaker 1 (TBD) Research Area 2: Improving dynamical predictions 11:10 – 11:40 Research Area 2: Summary and discussion, Francois Counillon (NERSC & BCCR) and Yiguo Wang (NERSC & BCCR) 11:40 – 12:10 An update on the development of sea ice initialisation in NorCPM, Nicholas Williams (NERSC & BCCR) 12:10 – 13:10 Lunch Break Research Area 3: Limits of climate predictability 13:10 – 13:40 Research Area 3: Summary and discussion, Helene Langehaug (NERSC & BCCR) and Ingo Bethke (UiB & BCCR) 13:40 – 14:10 Changes in the North Atlantic Oscillation over the 20th century, Stephen Outten (NERSC & BCCR) 14:10 – 14:40 Predicting Atlantic and Benguela Niño events with deep learning, Marie-Lou Bachelery (CMCC) Research Area 4: Applications of climate predictions 14:40 – 15:10 Research Area 4: Summary and discussion, Ole Wulff (NORCE & BCCR) and Iselin Medhaug (NORCE & BCCR) 15:10 – 15:40 Bayesian Recalibration of IFS Subseasonal Flow Regime Prediction and Its Application on Predicting Dry Spells, Hsin-Yu Chu (UiB & BCCR) 15:40 – 15:50 Meeting wrap-up, Noel Keenlyside (UiB & BCCR) This informal discussion space is open to all Bjerknes members and guests. Please feel free to join us and we welcome contributions from all. Best regards, Mariko On behalf of the Bjerknes Climate Prediction Unit leader group