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Texture features of multi-year fresh ice in the Transcription bay, East Antarctica, in the period of summer melting
https://doi.org/10.31857/S2076673422020132
Abstract
The paper presents new data on the texture and density of a unique natural object – perennial fresh landfast ice in the Gulf of Transcription (East Antarctica), obtained in January 2020. The main purpose of the work was a planned (scheduled) inspection of the landing site selected for the 63rd season of the Russian Antarctic Expedition (RAE), investigation of the ice core sampling and analysis of its texture, including measuring the ice density. The thickness of the ice cover at the core sampling site was 3.02 m. In the long-standing (perennial) fast ice, the new ice is formed mainly from below as a natural growing of the congelation ice. From above a new ice is formed in smaller volumes, and it is either the infiltration ice in spring or freezing of melt water on the surface in autumn. Infiltration ice does not contribute much to the old fast ice, remaining a seasonal phenomenon. The reasons for that are insufficient snow accumulation in winter and the lack of salt water in the subglacial layer. In the upper layer of ice, its density is minimal and amounts to 680–720 kg/m3, increasing with depth and approaching its maximum at the lower edge – 917 kg/m3. The average density of ice is 875 kg/m3. The effect of primary air inclusions (bubbles) on the density of ice which contains large crystals of tens of centimeters in size is approximately the same for the whole ice thickness. Significant changes in the density of ice are caused by secondary inclusions which are formed during the freezing of melt water in the runoff and riverbed flows. It is shown how a crack in the ice, probably thermal, is further transformed under the influence of temperature and melt water runoff into a sinusoidal channel. This is rather common phenomenon associated with the thermal physics of the ice cover, the melting–freezing processes, and surface tension. The period of the sinusoid increases linearly with depth (the coefficient of determination R2 = 0.99). Thus, the new data obtained allows expanding the present-day scientific notions on the role of physical processes in formation and evolution of long-standing (perennial) ice.
Keywords
About the Authors
V. V. KharitonovRussian Federation
St. Petersburg
V. A. Borodkin
Russian Federation
St. Petersburg
References
1. Reimnitz E., Eicken H., Martin T. Multiyear Fast Ice along the Taymyr Peninsula, Siberia Arctic 1995, 48 (4): 359–367
2. Tang S., Qin D., Ren J., Kang J., Li Z. Structure, salinity and isotopic composition of multi-year landfast sea ice in Nella Fjord, Antarctica Cold Regions Science and Technology 2007, 49: 170–177 doi: 10.1016/J.COLDREGIONS.2007.03.005
3. Pope S., Copland L., Mueller D. Loss of Multiyear Landfast Sea Ice from Yelverton Bay, Ellesmere Island, Nunavut, Canada Arctic, Antarctic, and Alpine Research 2012, 44 (2): 210–221 doi: 10.1657/1938-4246-44.2.210
4. Massom R.A., Giles A.B., Fricker H.A., Warner R.C., Legresy B., Hyland G., Young N., Fraser A.D. Examining the interaction between multi-year landfast sea ice and the Mertz Glacier Tongue, East Antarctica: another factor in ice sheet stability? Journ of Geophys Research 2010, 115: C12027 http://dx.doi.org/10.1029/2009JC006083
5. Ackley S.F., Hibler W.D. III, Kugzruk F., Kovacs A., Weeks W.F. Thickness and roughness variations of Arctic multi-year sea ice Ocean '74 IEEE Intern Conf on Engineering in the Ocean Environment 1974, 1: 109–117 doi: 10.1109/OCEANS.1974.1161374
6. Johnston M. Seasonal changes in the properties of firstyear, second-year and multi-year ice Cold Regions Science and Technology 2017, 141: 36–53 http://dx.doi.org/10.1016/j.coldregions.2017.05.006
7. Johnston M. Thickness and freeboard statistics of Arctic Multi-year Ice in late summer: Three, recent drilling campaigns Cold Regions Science and Technology 2019, 158: 30–51 https://doi.org/10.1016/j.coldregions.2018.10.016
8. Timco G.W., Weeks W.F. A review of the engineering properties of sea ice Cold Regions Science and Technology 2010, 60: 107–129 doi: 10.1016/j.coldregions.2009.10.003
9. Ashton G.D. River and lake ice thickening, thinning, and snow ice formation Cold Regions Science and Technology 2011, 68: 3–19 doi: 10.1016/j.coldregions.2011.05.004
10. Gow A.J. Orientation textures in ice sheets of quietly frozen lakes Journ of Crystal Growth 1986, 74: 247– 258 doi:10.1016/0022-0248(86)90114-4
11. Korotkevich E.S. Poliarnye pustyni. Polar deserts Leningrad: Hydrometeoizdat, 1972: 420 p [In Russian] Available at: http://www.geolmarshrut.ru/biblioteka/catalog.php?ELEMENT_ID=3170 (accessed 1112 2020)
12. Klokov V.D., Kaup E.B., Khendel' D., Tsirat R. Chemical composition and ecological characteristics of lake waters of the Bunger hills Informatsionnyi biulleten' SAE SAE’s newsletter 1960, 111: 91–104 [In Russian]
13. Atlas okeanov: Antarktika. Atlas of the oceans: Antarctica St Petersburg: Department of Navigation and Oceanography of the Ministry of Defense of the Russian Federation, 2005: 300 p [In Russian]
14. Polyakov S.P., Martyanov V.L., Sukhanova A.A. Creating of a new RAE airfield near Banger Oasis, Antarctica. Rossiiskie poliarnye issledovaniia. Russian Polar Investigations 2019, 3: 11–15 [In Russian] http://www.aari.ru/misc/publicat/sources/37/RPR-37el_l_11-15 pdf
15. Sukhanova A.A., Popov S.V., Polyakov S.P., Kashkevich M.P., Martyanov V.L. GPR research for the organization of the runway on the sea ice in the area of the Bunger Oasis field base, East Antarctica Problemy Arktiki i Antarktiki. Arctic and Antarctic Research 2019, 65, 3: 315–327 [In Russian] doi: 10 30758/0555-2648-2019-65-3-315-327
16. Cherepanov N.V., Fedorov V.I., Tyshko K.P. Crystal structure of sea ice Eds : Frolov I Ye , Gavrilo V P Morskoy led. Sea ice The collection and analysis of observational data, physical properties and forecasting ice conditions (handbook) St Petersburg: Hydrometeoizdat, 1997: 402 р [In Russian with English summary]
17. Urabe N., Inoue M. Mechanical Properties of Antarctic Sea Ice Journ of Offshore Mechanics and Arctic Engineering 1988, 110: 403–408 http://offshoremechanics.asmedigitalcollection.asme.org/
18. Jeffries M.O. Massive, ancient sea-ice strata and preserved physical-structural characteristics in the Ward Hunt Ice Shelf Annals of Glaciology 1991, 15: 126–131 doi: https://doi.org/10.3189/1991AoG15-1-125-131
19. Bjerkelund C.A., Lapp D.J., Ramseier R.O., Sinha N.K. The texture and fabric of second-year sea ice cover at Mould Bay, Prince Patrick Island, NWT, April 1983 Proc IEEE Intern Geoscience and Remote Sensing Symp (IGARRS) 1985, 1: 426–431 https://nrc-publications.canada.ca/eng/view/object/?id=ccd97163-64f44d58-9245-aaf710c731a6
20. Cherepanov N.V., Kozlovskii A.M. Structure and some properties of Antarctic multi-year fast ice Informatsionnyi biulleten' SAE. SAE’s newsletter 1973, 85: 48–53 [In Russian]
21. Rusin N.P. Meteorologicheskii i radiatsionnyi rezhim Antarktidy. Meteorological and radiation regime of Antarctica Leningrad: Hydrometeoizdat, 1961: 447 p [In Russian]
22. Gherboudj I., Bernier M., Hicks F., Leconte R. Physical characterization of air inclusions in river ice Cold Regions Science and Technology 2007, 49: 179–194 doi: 10.1016/j.coldregions.2007.02.008
23. Perovich D.K., Gow A.J. A quantitative description of sea ice inclusions Journ of Geophys Research 1996, 101 (C8 15) 18,327–18,343 https://doi.org/10.1029/96JC01688
24. Timco G.W., Frederking R.M.W. A Review of Sea Ice Density Cold Regions Science and Technology 1996, 24: 1–6 doi: 10.1016/0165-232X(95)00007-X
25. Kharitonov V.V., Shushlebin A.I. Analysis of the joint application results of a borehole jack and thermal drilling in ice research Problemy Arktiki i Antarktiki. Arctic and Antarctic Research 2018, 64 (2): 157–169 [In Russian with English summary] doi: 10.20758/0555-2648-2018-64-2-157-169.
Supplementary files
For citation: Kharitonov V.V., Borodkin V.A. Texture features of multi-year fresh ice in the Transcription bay, East Antarctica, in the period of summer melting. Ice and Snow. 2022;62(2):275-286. https://doi.org/10.31857/S2076673422020132
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ISSN 2412-3765 (Online)