Instrumentation and measured variables on board R/V Akademik Tryoshnikov. All data will be available on the ACE database (https://zenodo.org/communities/spi-ace/). Datasets will be available within 2019. Some have restricted access until the end of 2019; thereafter, they are fully accessible. Particle sizes are given as diameters. Abbreviations are condensation particle counter (CPC), neutral cluster and air ion spectrometer (NAIS), scanning mobility particle sizer (SMPS), aerodynamic particle sizer (APS), wideband integrated bioaerosol sensor (WIBS), chemical ionization atmospheric pressure interface time of flight mass spectrometer (CI-APi-TOF), aerosol chemical speciation monitor (ACSM), cloud condensation nuclei counter (CCNC), cloud condensation nuclei (CCN), high-volume filter sampler (HVS), low-volume filter sampler (LVS), ice nucleating particles (INP), custom-built online gas chromotograph (iDIRAC), Automated Weather Station (AWS), and wave monitoring system II (WaMoSII).