Data sets for the research article "Heterogeneous ice nucleation ability of aerosol particles generated from Arctic sea surface microlayer and surface seawater samples at cirrus temperatures" by Wagner et al. (2021) in Atmospheric Chemistry and Physics - Wagner, Robert; Ickes, Luisa; Bertram, Allan K.; Els, Nora; Gorokhova, Elena; Möhler, Ottmar; Murray, Benjamin J.; Umo, Nsikanabasi Silas; Salter, Matthew E. (2021)