David, Robert Oscar; Gjelsvik, Astrid Bragstad; Hellmuth, Franziska; Carlsen, Tim; Dammann, Stian; Lundhaug, Ingrid; Schäfer, Britta; Storelvmo, Trude: INP (ice-nucleating particle) concentrations observed in air at the coast of Andøya, Norway during March and April 2022 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997445 (dataset in review),

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In: Sodemann, Harald; Aemisegger, Franziska; Andermann, Christoff; Barstad, Idar; Carlsen, Tim; Chandler, David M; Chazette, Patrick; Dammann, Stian; David, Robert Oscar; Dekhtyareva, Alena; Delanoe, Julien; Gjelsvik, Astrid Bragstad; Hellmuth, Franziska; Jiang, Tetyana; Kähnert, Marvin; Kirchner, Nina; Lundhaug, Ingrid; Schäfer, Britta; Schwarzenboeck, Alfons; Seeling, Alexander; Seidl, Andrew Walter; Storelvmo, Trude; Thurnherr, Iris; Totems, Julien; Voss, Paul: ISLAS2022: Calibrated stable water isotope measurements and aerosol measurements around the Nordic Seas [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997052 (dataset in review)

During a 4-week measurement campaign (ISLAS2022) in March and April 2022, we collected a comprehensive dataset characterizing the atmospheric water vapour and precipitation isotope composition within weather systems in the European Arctic and sub-Arctic. Focusing oqn an area covering the Nordic Seas and Northern Scandinavia, stable water isotope measurements with cavity ring-down spectrometers (CRDS) were taken from a research aircraft stationed at Kiruna, Sweden; from a Research Vessel going from Tromsø to the western ice edge in Greenland, and from measurements at supersites at Andenes on the Lofoten archipelago, Abisko, and Kiruna. Water vapour and precipitation isotope measurements from different sites and platforms were complemented by additional instrumentation to characterize the atmospheric conditions. Advanced instrumentation included wind LIDAR, ground-based vertical-pointing rain radar, and aerosol measurements at Andenes, two-directional depolarising aerosol LIDAR and horizontal cloud RADAR on the aircraft. Controlled meteorological balloons were launched from Ny-Ålesund, Svalbard into cold-air outbreak conditions. Surface precipitation samples were collected from a surface network including Abisko, Andenes, Kiruna, Longyearbyen, Ny-Ålesund, Jan Mayen, Bjørnøya, Tarfala, Ålesund, and Bergen. Surface snow was repeatedly sampled along a detailed transect from Kiruna to Lofoten archipelago. Citizen science snow sampling contributed to distributed surface snow sampling in Northern Scandinavia. All stable water isotope measurements have been calibrated onto the VSMOW-SLAP scale. The data from the ISLAS2022 measurement campaign enables the comprehensive assessment of air mass transformation and water turnover during cold-air outbreak conditions using stable water isotopes as a constraint.

This dataset contains the concentrations of ice-nucleating particles in air collected at Andenes, Norway. As described in Gjelsvik et al. (2025), the Coriolis-μ (Bertin, France) liquid impinger was used to collect aerosols in ultra-pure water (W4502-1L, Sigma-Aldrich, US) for offline INP analysis with the DRoplet Ice Nuclei Counter Oslo (DRINCO, Gjelsvik et al. 2025). Cumulative INP concentrations were calculated following Vali (1971). The INP concentrations were normalized to per standard litre using the air flow temperature measurements (Type K thermocouple) at the base of the inlet and the ambient sea level pressure based on data from MET Norway, station SN87110. The primary purpose for the collection of this dataset was to enable paired measurements of aerosols and ice-nucleating particle concentrations at sub-event time resolution. These aerosol measurements were obtained with an optical particle counter (OPC) sampling off the same inlet. The observational period lasted about 23 days, from 2022-03-13T18:45:00 to 2022-04-06T15:40:00, with the Coriolis typically sampling for 40 min, resulting in ~12m3 of air sampled for each INP experiment.