Det globale karbonbudsjettet 2025: Globale CO₂-utslepp fra fossile brensel er venta å auke med 1,1 %

KUNNGJØRING PRØVEFORELESNING Institutt for geovitenskap Det matematisk-naturvitenskapelige fakultet Universitetet i Bergen Ph.d.-kandidat Charlotte Rahlves holder prøveforelesning over følgende oppgitte emne for ph.d.-graden: Past and future impacts of climate changes on glaciers and implications for sea level Tid og sted: Fredag 28. november 2025, kl. 13.15 Auditorium 4, Realfagbygget Komité: Professor Kerim Hestnes Nisancioglu, Institutt for geovitenskap (leder for komiteen) Professor Anna Nele Meckler, Institutt for geovitenskap Førsteamanuensis Ryan Portner, Institutt for geovitenskap Adgang for interesserte tilhørere. VELKOMMEN!

Dear all, The next BCCR Monday Seminar will be given by Jorge Alvarez-Solas from the Institute of Geosciences in Spain. He will present his work on "Modelling Earth's ice sheets stability diagrams". The seminar will take place in the usual BCCR seminar room (4th floor of the West wing) at 11:00. We hope to see you there! Best regards, Julia and Robin Abstract Previous work has shown that both the Antarctic Ice Sheet (AIS) and the Greenland Ice Sheet (GrIS) display hysteresis behavior, which means that if ice is lost due to an increase of temperature, a comparatively larger decrease is needed to recover the original state. This implies that the ice-sheet volume is multistable with respect to temperature and that the ice loss could be largely irreversible. I will show quasi-equilibrium simulations of these ice sheets together with the Laurentide and Eurasian paleo-ice sheets ran with the 3D thermomechanical ice-sheet model Yelmo. Then by finding the adequate mathematical shape of the stability diagrams I will focus on how an emulator can be built for the transient modelling of these ice sheets throughout the Quaternary Speaker information I did my PhD in the LSCE (Laboratoire des Sciences du Climat et de l'Environnement) in France, focusing on the millennial abrupt climate change of the last glacial period. I continued with several post-docs in the faculty of physics of the Complutense University of Madrid, where I became Assistant Professor in 2019. Then, in 2023, I moved to the Spanish Research Council at the Geoscience Institute, also in Madrid. My research interests include ice-sheet and climate modelling for Heinrich and Dansgaard-Oeschger events, but also the glacial cycles and the future of the climate-cryosphere interactions Zoom details https://uib.zoom.us/j/62554083320 Password: bScc54hk!

Dear all, We also have a special Seminar by Christine Schott Hvidberg from the Niels Bohr Institute, University of Copenhagen, Denmark. She will present her work on "The evolution of the Greenland ice sheet - from past to present". The seminar will take place in the usual BCCR seminar room (4th floor of the West wing) at 11:00. We hope to see you there! Best regards, Heiko Abstract In the seminar, I will give an overview of how we use ice core observations to investigate the stability of the Greenland ice sheet in warmer climates. We use shallow ice cores to constrain present accumulation rates and we use deep ice cores to inform of past climate and ice dynamical changes. I will report from ongoing work to study the evolution of the Greenland ice sheet through glacial-interglacial cycles, investigate its retreat and dynamical changes in warm interglacial climate, including the Holocene, and what we can learn about its sensitivity in future warmer climates. I will also update from our ongoing field work in Greenland. We have completed the EGRIP ice core drilling in northeast Greenland and moved the camp to our former drill site GRIP and prepared re-drilling the bottom layers. This is part of the Green2ice project with the aim to determine the age of the Greenland ice sheet. Speaker information Christine Hvidberg is professor of climate physics in the world leading ice core research group at University of Copenhagen. She conducts ice core and glaciological research, and she has expertise in ice-sheet flow and mass balance, integrating ice cores and glaciological ice flow models. She is currently leading the Novo Nordisk Foundation challenge center PRECISE and the Horizon Europe project ICELINK.