Data from the Portable Ice Nucleation Experiment (PINE) during the M-Phase 2022 research cruise

Ice-nucleating particle (INP) measurements were taken using the Portable Ice Nucleation Experiment (PINE) chamber (Möhler et al., 2021) throughout the M-Phase research cruise in May-June 2022 aboard the Royal Research Ship (RRS) Discovery. The cruise started from Reykjavík, Iceland, with the track including the Labrador Sea and the Davis Strait, ending at Southampton, United Kingdom. PINE was located within the University of Leeds IcePod mobile laboratory (https://environment.leeds.ac.uk/dir-record/facilities-environment/1512/icepod) that was located on the foredeck of the ship. Aerosol was sampled through a heated total suspended particulate (TSP) sampling head at a flow rate of 33.33 L/min and into the IcePod laboratory, where the sampled air was split into four lines to monitor aerosols using multiple instruments; PINE was connected to one of these lines and operated at a flow rate of 2 L/min. PINE was run in constant temperature mode with the chamber nominally cooled to −28 °C, but was warmed briefly to 18 °C daily to prevent icing of the inlet in Arctic conditions. A new PINE operation was started every 1-4 days, with the operation folder names labelled as the date the operation started in the YY/MM/DD format. The raw PINE data is provided here for each operation ("operation setup", "raw_Data", and Level 0 data ("L0_Data")). The raw data was processed using the PINE INP Analysis (PIA) software version 2.0.2 to derive time series data (Level 1, "L1_Data") and temperature spectra (Level 2, "L2_Data") of INP concentrations, as per Büttner and Fösig (2023) (https://zenodo.org/records/15592786). Further details of the design and operation of PIA can be found here: https://pia.readthedocs.io/en/stable/. GPS coordinates are provided for the ship cruise track during the M-Phase 2022 campaign. Original GPS files are provided in a folder, while a CSV file provides GPS data on a minute-by-minute basis.