Reconstruction of the relative level of the White Sea during the Holocene on the Karelian coast near Engozero settlement, Northern Karelia     

V. V. Kolka  O. P. Korsakova  T. S. Shelekhova  N. B. Lavrova  Kh. A. Arslanov 《Doklady Earth Sciences》2013,449(2):434-438

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Distribution of clay minerals in surface sediments from the eastern Barents and south-western Kara seas   总被引：2，自引：0，他引：2  

D. Nürnberg  M. A. Levitan  J. A. Pavlidis  E. S. Shelekhova 《International Journal of Earth Sciences》1995,84(3):665-682

Surface samples from the eastern Barents and south-western Kara seas have been analysed for clay mineralogy. Transport paths, the role of regional sources and local bedrock outcrops and the influence of hydrodynamic and glacigenous processes for clay distribution on the shelves are discussed in relation to central Arctic Ocean deep sea and sea ice sediments. Franz Josef Land and Novaya Zemlya show significantly different clay mineral associations. Although smectite concentrations are fairly high, Franz Josef Land can be excluded as a source for central Arctic sea ice sediments, which are relatively rich in smectite. In the Kara Sea, smectite concentrations in coastal sediments surpass even the Franz Josef Land concentrations. The large cyclonic gyre in the eastern Barents Sea between Novaya Zemlya and Franz Josef Land, which serves as a mixing zone between Arctic and North Atlantic water, is apparently reflected within the smectite distribution pattern. With the exception of Franz Josef Land, the area of investigation is typically low in kaolinite. In particular, coastal areas and areas north of Novaya Zemlya, influenced by the inflow of Arctic waters, show the lowest kaolinite concentrations. A high kaolinite occurrence within the Nansen Basin is most probably related to Franz Josef Land and emphasizes the importance of long-range downslope transport of sediments across the continental slope. The surface water circulation pattern in close interaction with local outcrops onshore Novaya Zemlya and locally restricted occurrences within the eastern Barents Sea significantly alter the illite dispersal pattern. Illite concentrations are lowest around Franz Josef Land. Chlorite is generally low in the area of investigation. Submarine outcrops and important chlorite occurrences onshore Novaya Zemlya bias its distribution pattern.  相似文献   

Evaluation of the impact of oceanic heat transport in the North Atlantic and Barents sea on the Northern Hemispheric climate     

V. V. Zuev  V. A. Semenov  E. A. Shelekhova  S. K. Gulev  P. Koltermann 《Doklady Earth Sciences》2012,445(2):1006-1010

In this work, we evaluate the impact of terminated oceanic heat flux in the North Atlantic and Barents Sea on the Northern Hemisphere climate in January by numerical experiments with a coupled model of atmospheric general circulation and a thermodynamic model of the upper mixed layer of the ocean. We analyze the variations in the atmospheric circulation and near-surface temperature. We found that the termi-nation of the oceanic heat flux leads to a depression in atmospheric centers of action in the Northern Hemi-sphere (by 3?C5 hPa) and a significant cooling over the continents with the strongest temperature decrease down to ?10°C in northwestern Eurasia.  相似文献   

Lithology,Biostratigraphy, and Geochronology of the Late Pleistocene–Holocene Sediments on the Coast of Onega Bay of the White Sea     

Kolka  V. V.  Korsakova  O. P.  Lavrova  N. B.  Shelekhova  T. S.  Zaretskaya  N. E. 《Doklady Earth Sciences》2019,485(1):312-316

Doklady Earth Sciences - This paper reports on the lithological, micropaleontological, and chronometric data (radiocarbon dating) for one of the areas of the White Sea coast. The sedimentary...  相似文献   

The white sea level change and glacioisostatic land uplift during the Holocene near the Settlement of Kuzema,North Karelia Region     

Kolka  V. V.  Korsakova  O. P.  Shelekhova  T. S.  Lavrova  N. B.  Arslanov  Kh. A. 《Doklady Earth Sciences》2012,442(1):139-143

This paper contains lithostratigraphic and chronometric (radiocarbon dating) data on one of the regions on the Karelian coast of the White Sea obtained in the course of investigation of sedimentary sections from recent lake basins, which were separated at different times from the sea due to uplift of the glacioisostatic crust of the Earth. They were used as a basis for stratigraphic subdivision of marine and fresh water sediments and for reconstruction of the White Sea coast level change during the Late Pleistocene-Holocene near the Settlement of Kuzema, Karelia.  相似文献   

Lithology and late postglacial stratigraphy of bottom sediments in isolated basins of the White Sea coast exemplified by a small lake in the Chupa settlement area (Northern Karelia)     

O. P. Korsakova  V. V. Kolka  A. N. Tolstobrova  N. B. Lavrova  D. S. Tolstobrov  T. S. Shelekhova 《Stratigraphy and Geological Correlation》2016,24(3):294-312

The complex lithological, geochemical, geochronological, and micropaleontological (diatoms, spores, pollen) investigations of stratified bottom sediments that constitute facies-variable sedimentary sequences in a small isolated lake located near the upper limit of the sea on the White Sea coast made it possible to define lithostratigraphic units (LSU) forming the complete sedimentary succession in deep parts of isolated basins. It is shown that stratigraphy of heterogeneous sequences is determined by two regional transgressive–regressive cycles in relative sea level fluctuations: alternating late Glacial and Holocene transgressions and regressions. The lower part of a clastogenic clayey–sandy–silty sequence successively composed of freshwater (LSU 1) and brackish-water (LSU 2) sediments of the ice-marginal basins and marine postglacial facies (LSU 3) was formed during the late Glacial glacioeustatic marine transgression. Its upper part formed in different isolated basins at different stages of the Holocene is represented depending on its altimetric position on the coastal slope by costal marine sediments (LSU 4) and facies of the partly isolated inlet (LSU 5). The organogenic sapropelic sequence, which overlies sediments of the marine basin and partly isolated bay, corresponds to lithostratigraphic units represented by Holocene sediments accumulated in the meromictic lake (LSU 6), onshore freshwater basin (LSU 7), and freshwater basin with elevated water mineralization (LSU 8) deposited during maximum development of Holocene transgression and lacustrine sediments (LSU 9) formed in coastal environments during terminal phases of the Holocene. The defined lithostratigraphic units differ from each other in lithological, micropaleontological, and geochemical features reflected in structural and textural properties of their sediments, their composition, inclusions, and composition of paleophytocoenoses and diatom assemblages.  相似文献   

Using Small Unmanned Aerial Vehicles for Turbulence Measurements in the Atmosphere     

Shelekhov  A. P.  Afanasiev  A. L.  Shelekhova  E. A.  Kobzev  A. A.  Tel’minov  A. E.  Molchunov  A. N.  Poplevina  O. N. 《Izvestiya Atmospheric and Oceanic Physics》2021,57(5):533-545

Izvestiya, Atmospheric and Oceanic Physics - This paper demonstrates the possibility of using the telemetry of small unmanned aerial vehicles (UAVs) to monitor the state of atmospheric turbulence....  相似文献