Seasonal variations of the oxygen isotope composition (δ
18
O) of the Yauza River since June 2019 to November 2021 are studied based on weekly samples, along with the isotopic composition and amount ...of precipitation 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‰.
The aim of this work is to obtain the vertical isotopic profile of the thick Pestsovoe pingo ice core in the southern part of the Tazovsky Peninsula, to determine the oxygen and hydrogen isotopic ...composition of the ice, and to reveal its formation conditions. Two trends were identified for the isotopic profile of the pingo ice: an insignificant increase of the δ
18
O (~1.5‰) and δD (~9‰) values at depths of 12–15 m and a gradual decrease of isotopic values by 3.8 and 23‰ for δ
18
O and δD, respectively, at a depth of 15–26 m. The formation of the pingo ice core in the semiclosed system resulted in fractionation of the isotopic composition of oxygen and hydrogen by more than 4 and 20‰, respectively.
The main aim of this work is to study the oxygen isotope composition of Late Pleistocene syngenetic repeated ice wedges and to obtain a high-resolution isotope diagram based on detailed sampling of ...the Seyakha yedoma section in the sequence of the Late Pleistocene third lagoonal-marine terrace near the mouth of the Seyakha (Zelenaya) River, on the shore of the Gulf of Ob. According to three new radiocarbon ages (25.2 to 23.3 ka BP) from absolute heights of +2 to +5 m and also ages obtained earlier (17.3 ka BP from +18.8 m; 11.6 ka BP from +21.2 m), the approximate age of this ice wedge ranges from 23 to 15–18 ka. The values of δ
18
О in the upper fragment of the ice wedge vary from –25.75 to –23.15‰. The amplitude of horizontal variations in δ
18
О at +15.2 m height is 1.49‰ (–23.41 to –24.9‰). The lower fragment of the ice wedge at +6 m height is characterized by a broader variation range of δ
18
О compared to the upper one: δ
18
О varies in the horizontal direction from –23.41 to –26.63‰. The detalization step of the oxygen isotope diagram obtained is 80–100 years. The mean January temperature in the period 23–15 (18) ka BP ranged from –35 to –39°C.
The aim of the present work is to trace the trend of change of isotopic composition (18O and D) in fresh snow cover from a unified air mass along the transect of about 1400 km long in the north of ...the European part of Russia: from Konosha station (6101 N, 4010 E), through Inta Seida station, to Eletskaya station in the piedmont of the Polar Urals (6702 N, 6413 E). Another aim was to explain variations in deuterium in this snow cover.
The correlation between the isotopic composition of ice wedges and temperature of the cold period over the past 80 years in the north of the permafrost zone of Russia is verified using modern climate ...data. The meteorological observations from 1930 to 2017 and the values of δ18О in ice wedges for each region of the permafrost zone are analyzed to identify the most obvious and stable dependence of the isotopic composition and winter temperature. This will allow creating more detailed quantitative paleoreconstructions of climate change within the modern permafrost zone of Siberia.
The stratal ice deposits represent one of the most dangerous cryogenic phenomena, which influences the economic activity in areas with permafrost development. This is particularly true in connection ...with intense development of Arctic areas, which required extensive studies of stratal ice deposits and their genesis. Such studies were conducted in the Shpindler Cape area, on the southern coast of the Baidaratskaya Estuary, near the Marresale and Kha rasavei settlements, in the western Yamal Peninsula, in the Bovanenkovo area, in the Yuribei River valley, in the Neito Lake area in the central part of the Yamal Peninsula, and in the Erkutayakh River valley.
The isotope-oxygen composition of ice wedges, ground ice, ice of the intrusive-segregated seasonal mound, and segregated ice of Eastern Chukotka near Koolen Lake, the settlement of Lavrentiya on the ...Chul’kheveem River, the settlement of Lorino, and the city of Anadyr on the Onemen Bay coast was studied. The comparison of isotopic diagrams showed that the variations in δ
18
O of the Holocene ice wedges of Eastern Chukotka did not exceed 2‰, which indicates the insignificant variability of climatic winter conditions in the late Holocene. The long-term mean-January temperature values varied less than 3°C according to calculations from the equations of interrelation between air temperature and the isotopic composition of the wedges.
Studies of lakes at different stages of separation from the sea have been carried out on the northwestern coast of Kandalaksha Gulf of the White Sea. At the end of the winter period, from March 16 to ...29, 2013, the lakes Kislo–Sladkoe, Trekhtzvetnoe, Nizhnee Ershovskoe, Ermolinskaya Bay and snow near the pier of Pertsov White Sea Biological Station of Moscow State University (WSBS MSU) were studied. The isotope characteristics of the water of lakes, ice and snow, the distribution of salinity, temperature, and hydrogen sulfide content were studied.
Syngenetic ice wedges have been investigated on Ayon Island. Their isotope composition and the geochemical characteristics of both ice wedges and enclosing sediments have been obtained; four ...ice-wedge stages have been distinguished. Paleo temperature reconstructions for Ayon Island and adjacent territories of northern Chukotka have been obtained based of these results. Almost identical trends in the distribution of ice-wedge isotope characteristics in the Arctic islands and in the lower reaches of the Kolyma River were observed, as well as differences in the magnitude of isotope oscillations during the transition from the Late Pleistocene to the Holocene compared to ice wedges of the Lower Kolyma region.
