Flow cytometry dataset showing the abundance of microorganisms (< 20 µm) in sectioned second year sea ice (SYI) samples taken during the MOSAiC (PS122) drift expedition in the central Arctic Ocean

This dataset provides the abundance of microorganisms (smaller than 20 µm) enumerated using flow cytometry (FCM) during the Multidisciplinary drifting observatory for the study of Arctic Climate (MOSAiC (PS122)) sampled from second year sea ice (SYI) core sections. For sea ice derived FCM abundance data, subsamples of 15 mL were taken from pooled ice core sections that were melted in filtered sea water and correspondingly a correction factor applied, to enumerate the abundance of microorganisms per mL of melted sea ice. Additional expedition and sampling details can be found in the ECO-overview paper (Fong et al., 2024). We thank all persons involved in the expedition of the Research Vessel Polarstern during MOSAiC in 2019-2020 (AWI_PS122_00) as listed in Nixdorf et al. (2021).