№ 2 (100) 2014
| ||И.А. Алехина, Н.И. Васильев, А.А. Екайкин, В.Я. Липенков. Предварительные результаты исследований химического состава воды, замерзшей в буровой скважине после вскрытия озера Восток (.pdf)||5|
| ||К.В. Полещук, С.Р. Веркулич. Реконструкция изменений уровня моря
в районе оазиса Бангера (Восточная Антарктида) в голоцене (.pdf)||15|
| ||А.В. Смирнов, А.А. Кораблев, А.Е. Вязилова. Сезонная и межгодовая
изменчивость термохалинных характеристик вод в районе корабля погоды «Майк» (.pdf)||25|
| ||Б.В. Иванов, А.М. Безгрешнов. Характеристики припайного льда в заливе Прюдс (на примере бухты Саннефьорд) (.pdf)||33|
| ||А.А. Балакин, Г.В. Алексеев, П.В. Богородский, В.В. Харитонов, В.Т. Соколов.
Вертикальные потоки тепла в верхнем 400-метровом слое Арктического бассейна
по данным наблюдений на дрейфующей станции «Северный полюс-38» (.pdf)||41|
| ||Н.Е. Иванов, А.П. Макштас. Оценка влияния климата на социально-
экономическую деятельность в Северной Якутии (.pdf)||57|
| ||В.С. Порубаев. Максимальная осадка килей гряд торосов в глубоководной части Северного Ледовитого океана (.pdf)||75|
| ||Г.Н. Войнов, К.Г. Смирнов. Структура полусуточных и суточных приливов
в юго-западной части Карского моря (.pdf)||82|
| ||Н.Н. Мельников, А.И. Калашник, Н.А. Калашник. О необходимости обеспечения
геодинамической безопасности нефтегазовых объектов западного сектора
Российской Арктики (.pdf)||95|
| ||СТРАНИЦЫ ИСТОРИИ.
Л.М. Саватюгин, И.Н. Сократова. Поход «Челюскина» — начало нового этапа освоения Арктики (к 80-летию событий) (.pdf)||104|
Table of contents
| ||I.A. Alekhina, N.I. Vasiliev, A.A. Ekaykin, V.Ya. Lipenkov. Preliminary results
of chemical analyses of water refrozen in borehole 5G-1 following the unsealing
of the lake Vostok||5|
One year after the lake’s unsealing, the first samples of refrozen lake water have become available. A new, 122m-long ice core taken from a depth of 3415–3543 m was obtained in spring 2013. A few horizontal thick sections of the secondary water ice were analysed using chromatography and GC-MS, with focus on the modified organic species of drilling fluid, which may give additional information on the properties of the lake water.
It was shown that ice core samples of the secondary water ice selected on its vertical profile, contain minor inclusions of drilling fluid, and the presence of this fluid means that we unfortunately cannot obtain authentic data about the initial chemical composition of the lake water. Essential variations in structure of drilling fluid components were established during studying the central channel of the core. It is assumed, that reactions which have led to similar transformations, can be connected with the high content of oxygen in lake water.
Elemental analysis of the cleanest samples showed increased concentrations of some elements. But because the samples were contaminated with drilling fluid, it is not possible to come to any firm conclusions about the composition of the lake water.
Keywords: Antarctica, Subglacial Lake Vostok, ice cores, Drilling fluid, Hydrocarbons, Organic composition, Chemical elements.
| ||K.V. Poleschuk, S.R.Verkulich. Reconstruction of Holocene relative sea-level changes
in the Bunger oasis region (East Antarctica)||15|
New curve of postglacial relative sea level changes in the Bunger oasis region is based on paleogeographic data analysis. Within approximately 12000–7000 yr BP the sea level was rising (maximum of this lift — modern altitude marks 12 m). About 6000 yr BP the sea level started falling, that was complicated by two events: slowing of falling speed about 4600–4000 yr BP; slowing of falling speed, stabilization and moderate sea level rise during 2500–1000 yr BP. Comparison new curve with eustatic level changes data, results of glacio isostasy modeling, data about past glaciatios parameters and deglaciation process allowed to estimate the contribution of eustatic and tectonic (including glacio isostasy) components in relative sea level changes in the Bunger oasis region.
Keywords: Antarctic, Bunger Oasis, Holocene, bottom sediments, coastal forms of relief, fossil shells, radiocarbon dating, diatom analysis, sea level, glacial isostasy.
| ||A.V. Smirnov, A.K. Korablev, A.E. Vyazilova. Seasonal and interannual variability
of Water thermohaline properties in the ows “Mike” area||25|
An evolution of oceanographic properties in the OWS ‘Mike’ area for 1948–2013 is examined. Seasonal and interannual variability of water’s thermohaline properties is considered, as well as processes shaping the mean upper-layer annual cycle and the mechanisms governing the vertical mixing. During the time interval several steady periods were distinguished with positive (1958–1963, 1967–1972, 2002–2013) and negative (1976–1981, 1992–1997) salinity anomalies accompanied by coherent temperature anomalies.
Keywords: the Nordic Seas, seasonal and interannual variability, thermohaline regime.
| ||B.V. Ivanov, A.M. Bezgreshnov. The characteristics of land-fast in Sannefjorden bukta (Prudz Bay, East Antarctic)||33|
The field studies of the land-fast ice in the Sannefjord (Prudz Bay) were carry-out in the 2010–2012 (56 and 57 RAE) near the Russian Antarctic station “Progress”. The researches involved a complex of sea ice physics, oceanographic, special meteorological and radiation observations. Morphometric measurements and thermal characteristics of the snow-ice cover were performed in special polygons and profiles. The new data on the thickness of snow over the land-fast ice and sea ice thickness, albedo, temperature and salinity of the snow-ice thickness, under ice water layer characteristics and frazil ice were obtained.
Keywords: Antarctic, land-fast ice, sea ice, snow, thermal and morphometric properties of sea ice, albedo.
| ||A.A. Balakin, G.V. Alekseev, P.V. Bogorodsky, V.V. Kharitonov, V.T. Sokolov.
Vertical heat fluxes in the upper 400-meter layer of Arctic basin according
to observations at the drifting station “North Pole-38”||41|
Results of the vertical heat fluxes calculation in the upper 400-meter layer along the trajectory of “North Pole-38” station drift during 2010–2011 are presented. Methodology of observations, received data and calculations are described. The values of heat fluxes are analyzed and compared to results of previous experiments.
Keywords: vertical heat flux, Atlantic water, Pacific water, sea ice cover, upper mixed layer, shielding effect, temperature gradient.
| ||N.E. Ivanov, A.P. Makshtas. Assessment of Climate impact on the socio-economic activities in the Northern Yakutia||57|
The article continues series of papers described the current climate of the northern Yakutia and area of Hydrometeorological Observatory Tiksi. The region under study is characterized by harsh winter and strong winds in the coastal part. Climatic characteristics of heating season parameters and bioclimatic indexes are calculated with data of standard meteorological observations executed at the network of continental and marine meteorological stations during 1978–2010. Climatic characteristics of strong winds and gales in the Tiksi area for the period 1936–2010 are presented.
Keywords: Hydrometeorological Observatory Tiksi, Northern Yakutia, applied climatology, heating season, bioclimatic indexes, gale.
| ||V.S. Porubayev. Maximum draft of ice ridge keels in the deep-sea area
of the Arctic Ocean||75|
Charts of the distribution of the maximum ice ridge keel draft in the deep-sea part of the Arctic Ocean are presented. It is shown that the ice ridge keel draft in the available data was not greater than 37 m. It is noted that the ice ridges by their geometrical parameters can be comparable to bergу bits, which makes their identification difficult. It is emphasized that some specification is required for the deep-sea part of the Arctic Ocean called the “Arctic Basin” in the Russian scientific literature, in terms of describing its boundaries.
Keywords: draft of keels, ice ridges, the Arctic Ocean.
| ||G.N. Voinov, K.G. Smirnov. The structure of semi-diurnal and diurnal tides
in southwest Kara sea||82|
The spatial structure of М2-tide and К1-tide in the Kara Sea is considered on the basis of average estimates of the harmonic constants received by all available sea level observation materials for the XX century. Results of the harmonic analysis of sea level observation are given in the open part of the Kara Sea in August, 2012. These results agree with new maps of М2-tide and К1-tide for August by average estimates.
Keywords: Kara Sea, tides, М2-tide, К1-tide, harmonic constants.
| ||N.N. Melnikov, A.I. Kalashnik, N.A. Kalashnik. On providing geodynamic safety
of oil and gas objects in the western sector of Russian Arctic||95|
The prospects are considered of oil and gas production and transportation in the western sector of Russian Arctic. Possible geodynamic challenges are found both during field construction and hydrocarbon production and transportation. The analysis has been carried out of oil and gas fields being the basis for revealing basic group of impacts on safety and estimating prone- to- fails and emergencies oil and gas objects. Based on carried out studies in the region of the Barents Sea the conceptual approaches are suggested of providing geodynamic safety of oil and gas objects of the western sector of Russian Arctic. It includes the idea that relevant special geomechanical and geodynamical studies should be carried out for each stage of oil and gas object life cycle to be basic for development and implementation of geosafe preventive measures by the algorithm “work planning — hazard identification — risk assessment — geomechanical justification — development of risk minimization recommendations and measures”.
Keywords: Arctic, western sector, oil and gas objects, geodynamical safety
| ||L.M. Savatyugin, I.N. Sokratova Voyage of the “Cheluskin” — beginning
of the new stage of the Arctic exploration (to the 80th anniversary of the event)||104|
A historical analysis of the aims, tasks and course of the preparation of the voyage of the “Chelyuskin” steamship over the Northern Sea Route in 1933 are presented. The rescue campaign of the “Chelyuskinites” is described. The contribution of this epopee into further development of the Northern Sea Route is assessed.
Keywords: Arctic, Northern Sea Route, “Chelyuskin” steamship, Otto Shmidt, ice-breaker fleet
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