| ||E.A.Chernyavskaya, L.A.Timokhov Characteristics of the Arctic ocean surface layer and underlying halocline in winter (according to the 1973–1979 period)||5|
The paper presents the results of calculations of the mixed layer thickness, depth of maximum
salinity gradient and halocline thickness obtained using the most comprehensive oceanographic
data base for 1973–1979. The features of the spatial and interannual variability of the surface layer
characteristics and underlying halocline in the Arctic Ocean in winter (thickness of the mixed layer,
the mean salinity of the mixed layer, the mean Brunt-Väisälä frequency in the layer of halocline,
halocline thickness and salinity differences at the upper and lower boundaries of the halocline) are
investigated. Analysis of the surface layer state and the halocline showed that interannual variability
of the surface layer parameters in the Eurasian basin determined mainly by influence of the Atlantic
water and atmospheric circulation. The main factors that determine the variability of the Canadian
basin surface layer are the atmospheric processes, the Pacific water inflow through the Bering Strait,
ice melting and river runoff in the Laptev sea and the East Siberian sea.
| ||E.A.Zakharchuk, N.A.Tikhonova Features of generation of the topographic waves in the sea level field of Siberian shelf Arctic seas under influence anemobaric forses||18|
Based on the statistical methods, the features of the generation under the influence anemobaric forces of the wavelike sea level fluctuations of synoptic scale, which are identified 2baroclinic topographic waves, are studied. Considerable nonstationarity a relationship of sea level
fluctuations with various meteorological processes is detected. It is shown that the energy transfer
from anemobaric perturbations to the movement of sea water in the synoptic range of spatial and
temporal scales are more often in areas of the Arctic seas, where conditions are registered with sharp stratification, which are most favorable for the generation and evolution of baroclinic topographic waves. Results of cross-correlation analysis show that such areas are the waters adjacent to the estuaries of the rivers Ob, Yenisei and Lena.
| ||I.A.Nemirovskaya, M.D.Kravchishina, V.A.Artem’ev, A.V.Travkina Variability of suspended particulate matter and organic compounds in the surface waters of the Atlantic and Southern oceans (based on research data of 57th RAE)||31|
Suspended particulate matte and organic compounds (such as chlorophyll «a», lipids and
hydrocarbons) were studied in surface water layer along the route of R/V «Akademik Fedorov» (second
part of 57th Russian Antarctic Expedition, February–May 2012). Found that in the Southern Ocean
and in the western Atlantic Ocean hydrobiological factors are mostly influenced on the concentration
of the researched components. The pollution in the eastern Atlantic on the shelf of Iberian Peninsula
leads to a sharp increase in the concentration of lipids and hydrocarbons.
| ||E.V.Shevnina Methods of calculation of spring flood runoff characteristics according to the daily discharge data||44|
The numerical criteria for selection of spring flood begin and end dates have been proposed.
The calculation method of the depth of spring flood runoff have shown an examples of published
observed daily discharge for the rivers located within the water recourses boundary of Russian Arctic.
| ||E.N.Rusina, V.F.Radionov, E.E.Sibir Variability of aerosol and optical parameters of the atmosphere in Northern and Southern polar regions after 2000||51|
The paper presents new, received after 2000 year, results of observations of aerosol optical
depth and aerosol Ångström’s exponent for the international network AERONET stations in northern
and southern polar regions.
For the same period data of actinometrical measurements of atmospheric transparency at the
Russian polar stations are presented. They are compared with similar data of the Russian background
stations of air pollution monitoring. Features of change of aerosol and optical parameters at the
beginning of the real century in comparison with the end of the previous are revealed.
| ||O.A.Morozova, A.V.Vesman, E.D.Dobrotina, A.D.Tarasenko, N.K.Shumskaya, P.Y.Lavrentyev, V.A.Onoshko The hydrochemical conditions in the Kara sea in summer 2012||61|
The results of hydrochemical observations received in the «Yamal-Arctic» expedition in August-
September 2012 are considered. The river waters were spreading north-east toward the Severnaya
Zemlya Archipelago. Silicate concentration in the Ob’ Bay reached 150 μM, which exceeds the
average climatic values. The abnormally low dissolved oxygen concentration in the bottom waters of
the Baidara Bay was found. It might be caused by inflow of pore waters, containing dissolved forms
of iron and organic matter. A slight oxygen deficiency in the surface layer of the Baidara Bay has
been found. It is most likely due to mainland runoff and nutrient concentrations indicated this. The
oxygen deficit has not been observed in previous years. The intermediate dissolved oxygen maximum
was observed. The possible causes of the oxygen maximum formation were interpreted. The spatial
variability of the silicate, phosphate and chlorophyll-concentrations was analyzed. The local increase
of the chlorophyll А concentration in the pycnocline layer was noted in the Novaya Zemlya trench.
| ||V.V.Ivanov, E.O.Aksenov Atlantic Water transformation in the eastern Nansen Basin: observations and modelling||72|
The joint analysis of hydrographic observations and high resolution numerical modelling
is presented for the eastern Nansen Basin in the Arctic Ocean. The process of Atlantic Water
transformation on its pathway along the Eurasian continental margin is the major goal of this analysis.
It is demonstrated that the structure of Atlantic Water flow is more complicated than is conventionally considered. Intensive interaction between individual branches of this water en route from the confluence zone (North of St.Anna Trough) to the central Laptev Sea leads to fundamental changes in the flow structure and thermohaline properties of water masses. Dense water originating on the adjoining shelf of Severnaya Zemlya archipelago also contributes to the observed transformation. The end product of the transformation process is new water mass, which includes waters of Fram strait branch and Barents Sea branch of Atlantic water. This water masses occupies the depth range 200–1000 m. It is characterised by the positive temperature and by the absence of local maxima on temperature and salinity vertical profiles. Sitting on the continental slope makes this water mass quite mobile and therefore – the major candidate to reach Canadian Basin. This perspective is less likely for the original Fram strait branch water. In the Laptev Sea this water is detached off the continental margin and is likely to recirculate towards Fram Strait along the Lomonosov Ridge without entering Canada basin.
| ||M.Yu.Kulakov, A.P.Makshtas, S.V.Shoutilin Verification of the NCEP/NCAR reanalysis data by observations at the drifting station «North Pole»||88|
The paper presents the results of comparison the data of NCEP/NCAR reanalysis with data of
observations executed at the drifting stations «North Pole» in the central Arctic during 1954–2006
years. Numerical experiments with one-dimensional thermodynamic sea ice model showed that the
equilibrium ice thickness calculated using NP data twice higher than using the data of NCEP/NCAR.
The main reasons are overestimated in reanalysis data about specific humidity and air temperature
in the summer.
| ||A.A.Chetverova, I.V.Fedorova, T.M.Potapova, J.Bojke Hydrological and geochemical characteristics of the modern state of lakes of Samoylovsky island in the Lena River delta||97|
Climatic fluctuations influence to many features of water objects in the Arctic. Big of them
have longer period of adaptation for climatic and anthropogenic impacts than small objects such
as polygonal and thermokarst lakes and small streams. Lakes of Samoylov Island of the Lena River
delta are typical objects for the delta and could be used as markers for the region. New data about
environmental changes were obtained as results of monitoring observation of natural objects in the
Lena delta within the framework of Russian-German project «The System of the Laptev Sea». Results of
hydrological and geochemical investigations of lakes on Samoylov Island in summer time 2008–2010
yy. are presented in the article. Several types of lakes were found out based on hydromorphological,
geochemical characteristics of water and bottom sediments. Self-cleaning ability of the lakes was
| ||V.V.Dremlyug The last year of WWII on the Chukchi Peninsula||111|
| ||M.V.Dukalskaya On the 50th anniversary of the «Molodyozhnaya» Station||116|