Search Results - V. N. Mikhalenko

The continuing global warming causes a significant reduction and vanishing of glaciers in the tropics. The glaciers in Africa, New Guinea, and Venezuela can completely melt during next decade under current trend in climate change.

During the cold war, a secret Camp Century military base was created inside the ice sheet in the north-west of Greenland. At this station, the first deep ice core was recovered. It was a beginning of a new era in paleoclimatology – a continuous record of climatic changes over the past 100 thousand y...

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Identification of tephra and its allocation (association) with known eruptive events allows obtainng chronostratigraphic markers, on the basis of which an age scale for dating glacial strata can be developed. To determine the sources of ash in the ice core obtained in 2022 during drilling of glacier...

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Cold glaciers in the middle latitudes are considered unique archives of environmental and climate change. However, alpine ice cores are difficult to interpret, since dynamic changes can occur over very short distances. Detailed radar survey can be used to assess the effect of ice inflow from areas w...

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Computed tomography (CT) is a nondestructive high-resolution way to investigate the three-dimensional structure of samples (ice, rock, etc.). The results of CT analysis of glacial cores consisting of firn and ice extracted on the Western plateau of the Elbrus Mountain (5100–5150 m a.s.l.) in the sum...

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The aim of the work was to study the isotopic characteristics of precipitation to establish the dependence of δ18O values on temperature at the time of precipitation and to get closer to understanding the processes that form the isotopic signature of the Elbrus snow cover and glacial ice. The sampli...

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The results of the isotopic investigations of several ice cores obtained at the Western Plateau of Mt. Elbrus (the Caucasus) are presented. There is a distinct seasonal cycle in the isotopic composition record in these cores. Mean annual and seasonal values of the isotopic composition and accumulati...

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The results of meteorological observations, carried out in the framework of the international project Ice Memory on the Western plateau of the Elbrus Mountain during the Second drilling expedition (24.06–17.07.2018), are analyzed. The analysis of the field data made together with the assessment of t...

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The reconstruction of changes in the temperature of the base of the active layer (at a depth of 10 m) of the glacier on the Western plateau of Elbrus for the period 1930–2008 was performed. The temperature dynamics at this depth generally corresponds to the average annual changes in the air temperat...

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In 2015–2016 during the research expeditions of Institute of Oceanology, Russian Academy of Sciences the study of stable water isotopes (18O and D) was conducted on glaciers of Novaya Zemlya. As a result, first data on isotopic composition of seasonal snow cover and glacial ice of different ages wer...

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A study of the isotope signature of glacial ice in the Western Elbrus Plateau (the Caucasus) was made on the basis of five ice cores obtained in different years with high resolution. It was shown that the isotopic characteristics of ice are associated with the processes of accumulation and wind scou...

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The chemical composition (Na+, NH4+, K+, Mg2+, Ca2+, F−, Cl−, NO3− and SO42−) of an ice core from the Ushkovsky volcano was studied. A shallow (13.85 m) core was drilled in the fall of 2022 in the Gorshkov crater. The majority of the core (56%) consists of infiltration ice, formed by the penetration...

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The isotopic composition (δ18 О, δ 2 Н) of ice sampled during core drilling of a glacier in the crater of the Ushkovsky volcano in the summer of 2022 (new core) was studied. The ice core 14 m long dates from 2006 to 2022 and covers 16 years of accumulation. The values of δ18 О and δ2 Н of the ice va...

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The paper evaluates the possibility of using a computing complex that includes a SNOWPACK model and an algorithm for calculating orographic precipitation addition to reproduce snow cover in mountainous areas. This model complex was tested in the conditions of two contrasting mountain-glacial systems...

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The article presents the investigation of mineral particles from an ice core obtained from Ushkovsky volcano (Kamchatka) in the fall of 2022. The 14-meter-long ice core was studied to identify the causes of mineral dust concentration variability and to determine its sources. Insoluble solid particle...

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During the field campaign in August 18–30, 2020 the meteorological regime and heat balance of the glacier surface were investigated in the crater of Mt Elbrus Eastern Summit (5600 m a.s.l.) together with the GPR measurements of the ice thickness and seasonal snow cover. Preliminary data analysis all...

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We present and discuss the chronology of dust deposition events documented by the shallow firn and ice cores extracted on the Western Plateau, Mt. Elbrus (5150 m a.s.l.) in 2009, 2012 and 2013. Snow and ice samples were analysed for major ions and minor element concentrations including heavy metals....

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Glacier variations over the past centuries are still poorly documented on the southern slope of the Greater Caucasus. In this paper, the change of Chalaati Glacier in the Georgian Caucasus from its maximum extent during the Little Ice Age has been studied. For the first time in the history of glacio...

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The isotopic composition of oxygen of the snow-and-firn and snow thickness on the Eastern peak of Elbrus had been studied. In 2006-2008, a number of snow samples were taken in the near-peak area of Elbrus to analyze the isotopic composition of them. The drilling was performed at the crater of the Ea...

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