The relation of the stable oxygen isotope (δ¹⁸O) was measured in surface water and snowpatches of the northeast coast of Chukotka collected in 1987 and 2017. Data is compiled from Vasil'chuck 1992 (vol.1 & vol.2) and Vasil'chuk et al. 2021.
Stable isotopes were analyzed in the stable isotope laboratory of the Geography Faculty at Lomonosov Moscow State University (Prof. Yu. Vasil'chuk and Dr. N. Budantseva) using a Finnigan Delta-V Plus mass spectrometer applying equilibration techniques. International water standards (SMOW, GRESP, and SLAP) were used for calibration. Analytical precision was ±0.4‰ for δ¹⁸O and ±1‰ for δ²H. All values are presented in δ-notation in per mille (‰) relative to the Vienna Standard Mean Ocean Water (VSMOW).