Dataset: PolarCAP/CLOUDLAB campaign in Eriswil, Switzerland, data from the INP contrast study in January and February 2024 used in the publication in ACP: Ice-nucleating particle depletion in the wintertime boundary layer in the pre-Alpine region during stratus cloud conditions

The 2DVD data for 8-12 January 2024 and 26-29 February 2024 can be found in the folder 2DVD.zip. More detailed information on the filter samples in Eriswil and Hohenpeißenberg can be found in Filter_info_HPB_ERI.zip. Surface temperature information from the HATPRO sensor can be found in HATPRO_temperatures.zip. Meteorological data from windsond launches can be found in Windsond.zip. Radar reflectivity measurements with RPG94 can be found in Radar_RPG94.zip. Funding for this study was provided by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) within the priority program SPP 2115 PROM via project numbers 408027490 (PolarCAP) and 408008112 (PICNICC, CORSIPP), by the European Union’s Horizon Europe projects CleanCloud (grant no. 101137639), the European Union’s Horizon 2020 research and innovation program (CLOUDLAB, grant agreement no. 101021272), the European Union's EU‐HORIZON-WIDERA-2021 twinning program (BRACE‐MY, grant no. 101079385) and the DFG project EMPOS (project number 516261703). The LACROS infrastructure received financial support via ACTRIS-D, which is funded by the Federal Ministry of Education and Research of Germany under the funding code 01LK2001A.