Arctic and Antarctica
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MAIN PAGE > Journal "Arctic and Antarctica" > Rubric "Arctic ice"
Arctic ice
Ananicheva M.D., Maslakov A., Antonov E.V. - Degradation of cryospheric objects in the Lavrentia Bay vicinity, Eastern Chukotka, Russia pp. 17-29


Abstract: The article contains the results of field investigations of cryospheric objects – land-based glaciers and permafrost rocks in the area of the Lavrenty Bay, Eastern Chukotka. Glaciers of the Laurentian group were described in the mid-1970s by Rudolf Sedov, later they were studied with the help of space imagery by one of the authors. Since glaciers are of small size, and satellite images can give errors in this case, it was necessary to check in situ their condition. Field studies have made it possible to ascertain the severe degradation of small glaciers of the Chukchi Highlands. Also field studies of the permafrost seasonal thawing, carried out by the authors in the season of 2017, revealed that the difference in thickness of the seasonally thawed layer in the study area at the end of August was, in comparison with the previous year, -0.5 .. + 4.3 cm, depending on local natural conditions. 
Agafonova S. - River ice regime of the Arctic zone of Western Siberia under the modern climatic conditions pp. 25-33


Abstract: The paper contains the results of the hydrological generalization of the features of river ice regime of the Arctic zone of Western Siberia. The rivers under study (Nadym, Pur, Taz, the lower Ob and others) flow in swamped lowland in the area of permafrost, which defines the peculiarities of their hydrological conditions. The author studies the ice regime of navigation and ice crossing on these rivers. Special attention is given to the characteristics of the level regime in the period of ice phenomena, which helps define the danger of ice-related floods. The research is based on the data of 40 stage gauges from the start of measurements to 2014. The author demonstrates the patterns of special distribution of the main characteristics of the ice regime, determined by the dependence of average values on the geographic latitude of the studied areas. The author considers regional peculiarities of the conditions of ice level growth during the ice formation period and defines the floodable inhabited areas. 
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