INP data of "Upward transport and segregation of ice-nucleating particles in deep convective clouds"

Ice-nucleating particles (INPs) play a crucial role in Earth’s weather and climate by influencing cloud propertiesand precipitation. However, their abundance in the free troposphere, vertical distribution, and transport mechanisms are notwell-characterized. This study presents immersion INP measurements from filter samples collected aboard the High AltitudeLOng range research aircraft (HALO) in the troposphere and the lower stratosphere (up to 14.5 km) over Europe during theCIRRUS-HL (Cirrus in High Latitudes) campaign in summer 2021. By sampling cloud particle residuals and aerosol particlesin the inflow and outflow of deep convective clouds (DCCs), and performing offline INP analysis, we shed light on the verticaltransport and segregation of INPs in DCCs. INP-temperature spectra of convective inflow included both INPs active at high (T > -15 °C) and low temperatures (T < -20 °C). In contrast the outflow spectra only featured INPs active at low temperatures. We explain the observed INP segregationin the updraft with precipitation scavenging of INPs active at high temperatures. INPs active at lower temperatures (T < -20 °C),however, are efficiently transported upwards into the free troposphere. There, ambient temperatures are below -40 °C, i.e., tem-peratures far below the temperatures at which these INPs initiate immersion freezing. In the DCC outflow, INP concentrationsexceed the upper tropospheric background concentration by at least two orders of magnitude. These INPs are then availablefor ice formation in mid and upper tropospheric clouds. The given .csv files contain the data for reproducing INP figures in the publication. The data structure of the csv files is explained in the README file.