Sodemann, Harald; Seidl, Andrew Walter; Thurnherr, Iris: Calibrated stable isotope measurements in water vapour at the ALOMAR mountain observatory at Andenes, Norway during March and April 2022 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997095 (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 measurements of the stable isotope composition in water vapour in terms of δ18O, δD and Deuterium excess from the mountain observatory ALOMAR (Arctic Lidar Observatory for Middle Atmosphere Research) at 376 m a.s.l. near Andenes, Norway, during the ISLAS2022 field campaign. This measurement station was part of a ground network to enable paired measurements of water vapour and precipitation at sub-event time resolution. The water vapour isotope measurements were obtained with Picarro cavity ring-down spectrometers of type L2130-i (Ser. No. HIDS2380) and a L2140-i (Ser. No. HKDS2038) installed on the top of the observatory main hatch at different time periods behind a heated and shielded inlet line. Air temperature and relative humidity near the inlet were obtained from a shielded TinyTag logger. Vapour isotope measurements were calibrated using long-term calibration coefficients for the particular analyser. All data are time synchronised and averaged to 5 min time resolution.