Cryolithomorphogenesis in the shallows of the Arctic seas in connection with modern warming

https://doi.org/10.35595/2414-9179-2019-2-25-77-89

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About the Authors

Anatoliy V. Gavrilov

Lomonosov Moscow State University, Faculty of Geology,
Leninskie Gory, 1, 119991, Moscow, Russia,
E-mail: gavrilov@bk.ru

Elena I. Pizhankova

Lomonosov Moscow State University, Faculty of Geology,
Leninskie Gory, 1, 119991, Moscow, Russia,
E-mail: pijankova@yandex.ru

Abstract

Тhe sedimentation with the formation of islands on the banks and shallows of the Laptev and western parts of the East Siberian Sea is characterized. These islands are formed on the site of islands-relicts of the late Pleistocene ice complex. Earlier for many centuries the underwater elevations were eroding, the depths of the sea in their place grew. It is shown that the appearance of islands is a consequence of modern warming. Warming in the Arctic is reinforced by an increase in the temperature of the bottom water, a reduction of ice coverage, and decrease in the albedo. Warming leads to an increase in the retreat rates of the icy coasts under the influence of thermal abrasion and thermal denudation, stimulates seasonal and long-term thawing of bottom sediments. The result of warming is the accumulation of a huge volume of thawed and seasonally thawing deposits. Elongation of ice-free period and intensification of storm activity lead to increased wave movement of sediments.

Shallows of the Arctic seas are characterized by an abundance of ropes and stamukhas. Sediments moved by waves are stored around the stamukhas, like the coastline. Stamukhas melts at the end of the summer season, and accumulative forms—underwater and above-water, often like a ring—remains. Low winter temperatures cause them to freeze. Underwater freezing occurs where the seasonal ice is frozen with the sea bottom (the fast ice layer). In this way, the ring-shaped island Yaya was formed on the Vasilievsky Bank. It was opened in 2013. In recent years, new islands have been designated on the topographic maps of the Laptev and East Siberian seas—Neizvestnye to the southeast of Bunge Land, Zatoplyayemyy—east of the Lena river delta.

Islands in the form of a ring or atoll formed also in past warming. In the Laptev and East-Siberian seas, these are Peschanyy (Sandy) and Nanosnyy (Alluvial) islands. In the cold north-eastern part of the Kara Sea islands with arc shape spits include Voronina, Uyedineniya (Privacy) islands, archipelago of Sergei Kirov and others.

Keywords

banks and shallows, submarine permafrost, mean annual temperature of bottom water and bottom sediments, fast ice layer, coastal-marine sedimentation, stamukhas.

References

  1. Atlas of hydrometeorological and ice conditions of the seas of the Russian Arctic: generalization of stock materials and the results of the expeditionary research of LLC “Arctic Research and Design Center for Shelf Development” in 2012–2014. Мoscow: Oil industry, 2015. 128 p. (in Russian).
  2. Dmitrenko I.A., Kirillov S.A., Tremblay L.B., Kassens H., Anisimov O.A., Lavrov S.A., Razumov S.O., Grigoriev M.N. Recent changes in shelf hydrography in the Siberian Arctic: Potential for subsea permafrost instability. Journal of geophysical research, 2011. V. 116. C10027. DOI: 10.1029/2011JC007218.
  3. Dudarev O.V. Modern litomorphogenesis on the East Arctic shelf. Abstract of dissert. for the degree of doct. of geolog. and mineralog. sci. Vladivostok, 2016. 49 p. (in Russian).
  4. Gavrilov A.V. The history of the development of the Arctic shelf and mapping of submarine cryolithozone. Geocryological mapping: problems and perspectives [electronic resource No 0321302405]: conference abstracts, Moscow, Moscow State University, Faculty of Geology, Faculty of Geography, June 5–6, 2013. Moscow: IPK PFUR, 2013. P. 144–146 (in Russian).
  5. Gavrilov A.V., Romanovsky N.N., Hubberten H.-V., Romanovsky V.E. The distribution of islands—relics of the ice complex—on the East Siberian Arctic shelf. Earth’s Cryosphere, 2003. V. VII. No 1. P. 18–32 (in Russian).
  6. Geocryological map of the USSR in scale 1:2 500 00 (ed. by E.D. Ershov). Moscow: Moscow State University, Faculty of Geology, 1996. 16 p. (in Russian).
  7. Geography of the seas of the Soviet Arctic. Proceedings of the Arctic and Antarctic SRI. V. 8. Iss. 2: Laptev Sea. Moscow—Leningrad: Glavsevmorput Publishing House, 1949. 484 p. (in Russian).
  8. Gorbunov Yu.A., Losev S.M., Dyment L.N. Stamukhas of the East Siberian and Chukchi Seas. Materials of glaciological research, 2007. V. 102. P 41–47 (in Russian).
  9. Gorbunov Yu.A., Losev S.M., Dyment L.N. Stamukhas of the Laptev Sea. Problems of Arctic and Antarctic, 2008. No 2 (79). Р. 111–116 (in Russian).
  10. Grigoriev M.N., Razumov S.O. Distribution and evolution of subaquatic permafrost in the coastal-shelf zone of the Laptev and East-Siberian seas as a consequence of long-term transformation of the coastal zone. Modern geodynamics and dangerous natural processes in Central Asia. Irkutsk: Publishing House of the Institute of the Earth’s Crust, SB RAS, 2005. Iss. 2. P. 136–155 (in Russian).
  11. Gukov A.Yu. Revival of Vasilyevsky Island. Nature, 2014. No 5. P. 70–73 (in Russian).
  12. History of discovery and development of the Northern Sea Route. Moscow: Maritime transport, 1954. V. 1. 592 p. (in Russian).
  13. Katasonov E.M., Pudov G.G. Cryolitological studies in the Vankina Bay area of the Laptev Sea. Permafrost Studies. Moscow: Moscow University Press, 1972. Iss. XII. P. 130–136 (in Russian).
  14. Khimenkov A.N., Brushkov A.V. Oceanic cryolithogenesis. Moscow: Science, 2003. 336 p. (in Russian).
  15. Molochushkin E.N. About the nature of heat exchange of water and bottom rocks in the coastal zone of the Laptev Sea. Questions of the geography of Yakutia. Yakutsk, 1969. V. 5. P. 121–126 (in Russian).
  16. Pizhankova E.I. Modern climate changes of high latitudes and their influence on the dynamics of the shores of the Dmitriy Laptev Strait area. Earth’s Cryosphere, 2016. V. XX. No 1. P. 51–64 (in Russian).
  17. Pizhankova E.I., Dobrynina M.S. Dynamics of the Lyakhovsky islands coastline (results of the interpretation of aerospace images). Earth’s Cryosphere, 2010. V. XVI. No 4. P. 66–79 (in Russian).
  18. Reimnitz E., Barnes P.W., Harper J.R. A review of beach nourichment from ice transport of shoreface materials, Beafort Sea, Alaska. Journal of Coastal Research, 1990. V. 6 (2). P. 439–470.
  19. Romanenko F.A. Structure and dynamics of the relief of the Kara Sea islands. Dynamics of the Arctic coasts of Russia. Moscow: Geographical Faculty of Moscow State University, 1998. P. 131–153 (in Russian).
  20. Romanovsky N.N., Eliseeva A.A., Gavrilov A.V., Tipenko G.S., Hubberten Kh.V. The long-term dynamics of the permafrost and gas hydrate stability zone on rifts of the East Siberian Arctic shelf (Report 2). Results of numerical simulation. Earth’s Cryosphere, 2006. V. X. No 1. P. 29–38 (in Russian).
  21. Zhigarev LA, Plakht I.R. Features of the structure, distribution and formation of subaqual cryogenic stratum. Problems of cryolithology. Moscow: Moscow University Press, 1974. Iss. IV. P. 115–124 (in Russian).

For citation: Gavrilov A.V., Pizhankova E.I. Cryolithomorphogenesis in the shallows of the Arctic seas in connection with modern warming InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: Moscow University Press, 2019. V. 25. Part 2. P. 77–89. DOI: 10.35595/2414-9179-2019-2-25-77-89 (In Russian)