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Winters of avalanche maximum in the Greater Caucasus for the period of instrumental observations (1968–2016)
https://doi.org/10.31857/S2076673420040057
Abstract
This investigation has been carried out to identify winters with the maximum frequency of avalanches in the Greater Caucasus. The analysis was performed for decades and for the entire period of instrumental observations (1968–2016). We chose severe snow winters which were followed by releases of particularly large and heavy avalanches (Lmax) and the maximum area of damage to the mountain territory during the study period. The following materials were used for this work: 1) 47‑year-old (1968–2016) series of data on snow avalanches from observations performed at the high-altitude station of the Faculty of Geography of the Lomonosov Moscow State University in the near-Elbrus area (Central Caucasus); 2) the results of winter and summer investigations of snow and avalanches in Arkhyz (the Western Caucasus); 3) materials of field works carried out in the Caucasus at different times; 4) the results of winter typing from data of 41 mid- and high-mountain meteorological stations in the Greater Caucasus; 5) literature sources; 6) survey data. The dependence of avalanche activity on the types of winters was established for key observational sites in the near-Elbrus area (Central Caucasus) and Arkhyz (Western Caucasus). This dependence formed the basis for determining the Lmax winters from factors of the avalanche formation, i.e. the air temperature and precipitation for the cold period from meteorological observations. Based on the method of winter typing, the winters of the maximal avalanche occurrence were estimated from data of 41 meteorological stations of the Greater Caucasus for 1936–2016. Results of the typing revealed similar avalanche extremes as it was found from direct observations of releases of snow avalanches: on the Southern macro-slope of the Western and Central Caucasus – 1986/87; on the Eastern Caucasus – 1971/72. Two seasons, claiming the role of the Lmax – 1967/68 and 1975/76, were revealed on the Northern macro-slope.
About the Authors
A. D. OleinikovRussian Federation
Moscow
N. A. Volodicheva
Russian Federation
Moscow
References
1. Kadastr lavin SSSR. Evropeyskaya chast′ SSSR. Kavkaz. Cadastre of avalanches in the USSR. European part of the USSR, Caucasus. Leningrad: Hydrometeoizdat, 1986: 132 р. [In Russian].
2. Oleynikov A.D. Dependence of avalanche activity on types of winters (by the example of the Greater Caucasus). PhD-tesis. Moscow: Institute of Geography, USSR Academy of Sciences, 1985: 27 р. [In Russian].
3. Zolotarev E.A. Research of snow and snow avalanches in the Elbrus Region by photogrammetry. Snezhnyye laviny Priel'brus'ya. Snow avalanches in the Elbrus Region. Moscow: MSU, 1980: 47–62. [In Russian].
4. Oleynikov A.D., Volodicheva N.A., Boyarshinov A.V. Winter snowfall and avalanche activity in the Greater Caucasus during the period of instrumental observations. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 2000, 88: 74–83. [In Russian].
5. Volodicheva N.A., Oleynikov A.D. Analysis of snow conditions and avalanche activity in the Arkhyz region over the past 47 years (Western Caucasus). Trudy VGI. Proc. of the VGI. 1984, 52: 110–117. [In Russian].
6. Abdushelishvili K.L., Kaldani L.A., Salukvadze M.E. Catastrophic avalanches in Georgia. Trudy ZakNIGMI. Proc. of the ZakNIGMI. 1979, 68 (74): 94–105. [In Russian].
7. Dzyuba V.V., Zolotarev E.A. Catastrophic avalanches in Svaneti in the winter of 1975/76. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 1979, 36: 229–234. [In Russian].
8. Zalikhanov M.Ch. Snego-lavinniy regim i perspektivy osvoeniya gor Bolshogo Kavkaza. The snow-avalanche regime and prospects for the development of the Greater Cauca sus Mountains. Rostov-on-Don: Publishing House of the Rostov University, 1981: 376 p. [In Russian].
9. Papinashvili L.K. Abnormally snowy winter of 1975/76 in Georgia. Trudy ZakNIGMI. Proc. of the ZakNIGMI. 1982, 75 (81): 69–74. [In Russian].
10. Troshkina E.S., Urumbaev N.A. Rarely catastrophic avalanches. Laviny Prielbrusiya. Avalanches in the Elbrus Region. Moscow: MSU, 1980: 41–47. [In Russian].
11. Salukvadze M.E. Characteristics of snowfalls during mass avalanches in Georgia. Trudy ZakNIGMI. Proc. of the ZakNIGMI. 1982, 77 (83): 68–72. [In Russian].
12. Tsomaya V.Sh., Ukleba K.K. Snow deposits in the high mountain region of the southern slope of the central part of the Caucasus Range which is being intensively developed for the national economy. Trudy ZakNIGMI. Proc. of the ZakNIGMI. 1980, 72 (78): 83–98. [In Russian].
13. Tushinsky G.K., Dzyuba V.V., Zolotarev E.A. Crowns of trees as a sliding surface of snow avalanches. Vestnik MGU. Seriya 5. Geografiya. Bulletin of MSU. Series 5. Geography. 1978, 2: 92–96. [In Russian].
14. Svanidze G.G., Abdushelishvili K.L., Kaldani L.A., Papinashvili L.K. Salukvadze M.E., Tsomaya V.Sh. Features of the formation of natural phenomena in Georgia in 1987. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 1989, 66: 60–65. [In Russian].
15. Volodicheva N.A., Zolotarev E.A., Efremov I.U., Mironova E.M., Oleynikov A.D. The application of numerical simulation for the description of snow avalanches motion. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 1990, 69: 19–23. [In Russian].
16. Oleynikov A.D., Volodicheva N.A. The recurrence of snowy winters and avalanche disasters at the Greater Caucasus in the twentieth century. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 2001, 91: 87–95. [In Russian].
17. Khodakov V.G., Menshutin V.M., Loktionova E.M., Suprunenko Yu.P., Gordeychik A.V., Piniya G.G., Pitskhelauri Z.D. Features of the formation and distribution of snow reserves in the Greater Caucasus during the ab normally snowy winter of 1986/87. Materialy Glyatsiologicheskikh Issledovaniy. Data of Glaciological Studies. 1988, 64: 13–19. [In Russian].
18. Eiyubov A.D., Agaev Sh.M. Extremely heavy snowfall in Azerbaijan in January 1972. Trudy ZakNIGMI. Proc. of the ZakNIGMI. 1974, 58 (64): 291–294. [In Russian].
Supplementary files
For citation: Oleinikov A.D., Volodicheva N.A. Winters of avalanche maximum in the Greater Caucasus for the period of instrumental observations (1968–2016). Ice and Snow. 2020;60(4):521-532. https://doi.org/10.31857/S2076673420040057
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