Sodemann, Harald; Kahnert, Marvin; Thurnherr, Iris; Voss, Paul; Dekhtyareva, Alena: Quality-controlled and gap-filled Lagrangian atmospheric measurements from Controlled Meteorological Balloons launched at Ny-Ålesund during March and April 2022 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997054 (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 on 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 an archive of measurement data from flights with Controlled Meteorological Balloons (CMET) launched at Ny-Ålesund, Svalbard, during the ISLAS2022 measurement campaign. The archive contains six data files in netCDF format with measurements of air temperature, pressure, relative humidity, winds, GPS coordinates, and controll parameters of the CMET payload. The CMET sondes were operated in profiling mode as well as drifting mode to obtain vertical profiles in cold-air outbreaks as well as Lagrangian atmospheric measurements during between 6 and 23 h long flights. Measurement gaps in location and wind data due to frequent loss of GPS signal were closed by suitable interpolation methods. Geopotential height during flight was obtained from pressure measurements and an atmospheric profile from corresponding radiosonde launches at Ny-Ålesund.