https://doi.pangaea.de/10.1594/PANGAEA.993273Chizhova, Julia NJulia NChizhova0000-0003-0539-5796Russian Academy of SciencesMikhalenko, Vladimir VVladimir VMikhalenko0000-0001-6097-9861Russian Academy of SciencesKutuzov, Stanislav SStanislav SKutuzov0000-0003-2007-0922Russian Academy of SciencesKozachek, Anna VAnna VKozachek0000-0002-9704-8064Arctic and Antarctic Research Institute, St. PetersburgPANGAEA2026LATITUDELONGITUDEDATE/TIMEδ18O, precipitationδ Deuterium, precipitationDeuterium excessTemperature, air, daily meanPrecipitation, daily totalMeteorological stationCavity ring-down spectroscopy (CRDS), Picarro Inc., L2130-i2019-05-02T00:00:00/2021-09-27T00:00:00Dataset10.1134/S00014338231300541173 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset presents the stable isotope composition (δ18O, δ2H, and d-excess) of daily precipitation samples collected at the Azau meteorological site (43.2659° N, 42.4799° E; 2300 m above sea level), located at the foot of the southern slope of Mount Elbrus in the Caucasus, Russia. Sampling was conducted on a daily basis at 09:00 Moscow Time from 1 May 2019 to 27 September 2021. The dataset includes 238 samples of liquid and solid precipitation, analyzed using a Picarro L2130-i cavity ring-down spectrometer at the Arctic and Antarctic Research Institute (AARI), St. Petersburg. Results are reported in per mil (‰) relative to the VSMOW-SLAP scale, with a measurement precision of 0.04‰ for δ18O and 0.5‰ for δ2H. The data reveal strong seasonal cycles, with higher δ-values in summer and lower in winter. The dataset also includes surface air temperature records and precipitation amount from the nearby Terskol meteorological station for the day of sampling.42.4799000000001343.26590000000019