Müller, Oliver; Fong, Allison A; Olsen, Lasse Mørk; Hoppe, Clara Jule Marie; Torstensson, Anders; Heitman, Laura; Larsen, Aud; Petelenz, Elzbieta; Tsagaraki, Tatiana M; Mayers, Kyle M J; Langvad, Maria; Balmonte, John Paul; Chamberlain, Emelia; Bratbak, Gunnar (2026): Flow cytometry dataset showing the abundance of microorganisms (< 20 µm) in sectioned first year sea ice (FYI) samples taken during the MOSAiC (PS122) drift expedition in the central Arctic Ocean [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993743 (DOI registration in progress)