Variations of the Oxygen Isotopic Composition of the Yauza River within the City of Moscow in 2019–2021 under the Effect of Snow Melting and Heavy RainsстатьяПеревод
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Аннотация:Seasonal variations of the oxygen isotope composition (δ18O) of the Yauza River since June 2019 toNovember 2021 are studied based on weekly samples, along with the isotopic composition and amount ofprecipitation over this period in Moscow. The seasonal character of the isotopic composition variations is shown both for precipitation and river water with the amplitude of variations in the isotope characteristics in precipitation being appreciably higher than in river water. The features of changes in the isotopic composition of Yauza River water are shown for the periods of snow melting in 2020 and 2021, which differ in the amount of snow reserves in the preceding winter seasons and in the volumes of snowmelt water. It is also shown that heavy rains in spring and autumn can lead to rapid (within several hours or the next day after rain) changes in the isotopic composition of river water by 1.0–2.3‰.