Dear IROWG, date and venue have already been announced before - but just to make sure that you mark your calendar: *IROWG-11* will be held together with the *OPAC-8 *Workshop from *September 10–16* in *Seggau Castle*, Austria. The workshop website will be: *https://opacirowg2026.uni-graz.at * Julia Danzer and Marc Schwärz will join me as OPAC chairs, Hui Shao and Tony Mannucci as IROWG WS chairs. The call for papers will follow in spring.* * Meanwhile, also the AMT Special Issue from our 2022 workshop is (finally) complete: https://amt.copernicus.org/articles/special_issue1270.html We wish you a peaceful time, Merry Christmas - and all the best for 2026, where we are looking forward to seeing you again. Uli Foelsche, on behalf of IROWG -- ************************************************************************** - Ulrich Foelsche - University of Graz - Institute of Physics, Department of Astrophysics and Geophysics (AGP) - Universitaetsplatz 5, 8010 Graz, Austria - Wegener Center for Climate and Global Change (WEGC) - Brandhofgasse 5, 8010 Graz, Austria - Tel: +43-316-380-8590 - E-mail: ulrich.foelsche@uni-graz.at **************************************************************************