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Start Over Descriptor "Lake ice" Language russian
3 results on '"Lake ice"'

1. Relationship between structure and chemical composition of fast sea and lake ice in the Cape Marre-Sale area, Western Yamal

Author

V. I. Butakov, Ya. V. Tikhonravova, and E. A. Slagoda

Subjects
fast sea ice, lake ice, ionic composition of ice, trace elements of ice, texture and microstructure of ice, hydrosphere clarke, europium and cerium anomalies, Science
Abstract

The texture, structure, ionic and trace element composition of samples of fast (coastal-sea) and lake ice collected in 2014 in the area of Cape Marre-Sale (the North-Western Siberia) were analyzed. The following main types of the ice structure were identified in ice sections: firn ice with randomly oriented small crystals; lake large- and small-crystalline bubble ice; layered fast sea ice with small isometric and vertically elongated crystals. The upper part of the lake ice is formed by recrystallized snow containing marine aerosols and lake water. The coefficient of involvement of the main ions from the solution during the ice formation varies for lake ice from 0.02 to 1.51, for sea ice – from 0.10 to 0.23, and for coastal-marine - from 0.03 to 0.04. The difference in the degree of ion involvement into the lake ice is related to the sources of components entering the process of formation of firn and large ice crystals from lake water. Coastal sea ice has high concentrations of trace elements relative to the clarks of sea waters. The income of trace elements into the coastal sea ice is probably determined by continental runoff. It is established that the mineralization of seasonal ice increases with a decrease in the size of crystals. The dependence of the values of the Europium anomaly on the rate of ice formation was revealed. The Europium anomaly in coastal sea ice is inherited from seawater, and the upper part of lake ice is inherited from precipitation.

Published
2022
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2. Variability of the Lake Onega ice coverage in the period 2000-2018 according to the satellite data

Author

V. N. Baklagin

Subjects
0106 biological sciences, National Snow and Ice Data Center, Global and Planetary Change, Series (stratigraphy), 010504 meteorology & atmospheric sciences, Science, ice phenomena, ice cover, 01 natural sciences, 010601 ecology, Geochemistry and Petrology, Satellite data, ice coverage, Environmental science, Lake ice, Physical geography, lake onega, satellite data, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology
Abstract

Studying of characteristics of the Lake Onega ice regime and investigating of the climate influence on the formation and destruction of the ice cover requires a continuous chronological series of data on the Lake ice coverage. Ice cover is the percentage of the ice area to the total area of the lake. In 1955–1990, calculations of the ice coverage of the Lake were based on the use of the results of airborne ice reconnaissance. On average for this period, from 5 to 15 values were annually obtained, which was not enough for a comprehensive analysis of the ice coverage variability. In this paper, for the frst time, a daily series of values of the ice coverage of the Lake Onega for the period 2000–2018 had been formed basing on the results of a combined analysis of the following satellite data sets: NSIDC, NOAA NESDIS, corrected by data of the satellite MODIS sensor. Values from November to May were grouped from the above data sets without regards for years of observations, and then the regression analysis of these values made possible to create a model (a polynomial of the 8th degree) of the chronological course of the ice coverage during the period of the ice phenomena existence on the Lake Onega. Te coefcient of determination of the model is 0.74, and the error in determining the ice coverage is 21%. Te average dates of the beginning, end, and duration of periods of the formation (from November 25th to January 19th), the destruction (from April 13th to May 17th) of the ice cover, as well as the total freeze-up time (from January 20th to April 12th) on the Lake Onega for the period 2000–2018 was determined. Te period of ice phenomena on the Lake Onega on average lasts for almost half a year (175 days), of which a signifcant part of the time is a complete freeze-up (84 days). It was found that the rate of formation of the ice cover (1.76% per day) on the Lake Onega is 1.65 times smaller than the rate of its destruction (2.90% per day), which approximately corresponds to similar results obtained for the Lake Ladoga (1.5 times).

Published
2018

3. ANNOTATED BIBLIOGRAPHY OF RUSSIAN LITERATURE ON GLACIOLOGY IN 2010

Author

V. M. Kotlyakov, L. P. Chernova, and G. I. Konovalova

Subjects
Global and Planetary Change, geography, geography.geographical_feature_category, Science, Glacier, Snow, Glaciology, Geochemistry and Petrology, Mudflow, Sea ice, Lake ice, Physical geography, Glacial period, Ice sheet, Earth-Surface Processes, Water Science and Technology
Abstract

This bibliography includes 294 books and articles published mostly in 2010. Annotated books and articles relate to ten thematic sections of glaciology: 1. General problems of glaciology 2. Physics and chemistry of ice 3. Ice in atmosphere 4. Snow cover 5. Snow avalanches and glacial mudflows 6. Sea ice 7. River and lake ice 8. Icings and ground ice 9. Glaciers and ice sheets 10. Paleoglaciology

Published
2015

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