A post-IR IRSL chronology and dust mass accumulation rates of the Nosak loess-palaeosol sequence in northeastern Serbia     

Zoran M. Perić  Slobodan B. Marković  György Sipos  Milivoj B. Gavrilov  Christine Thiel  Christian Zeeden  Andrew S. Murray 《Boreas: An International Journal of Quaternary Research》2020,49(4):841-857

In the Middle Danube Basin, Quaternary deposits are widely distributed in the Vojvodina region where they cover about 95% of the area. Major research during the last two decades has been focused on loess deposits in the Vojvodina region. During this period, loess in the Vojvodina region has become one of the most important Pleistocene European continental climatic and environmental records. Here we present the dating results of 15 samples taken from the Nosak loess-palaeosol sequence in northeastern Serbia in order to establish a chronology over the last three glacial–interglacial cycles. We use the pIRIR₂₉₀ signal of the 4–11 μm polymineral grains. The calculated ages are within the error limits partially consistent with the proposed multi-millennial chronostratigraphy for Serbian loess. The average mass accumulation rate for the last three glacial–interglacial cycles is 265 g m⁻² a⁻¹, which is in agreement with the values of most sites in the Carpathian Basin. Our results indicate a highly variable deposition rate of loess, especially during the MIS 3 and MIS 6 stages, which is contrary to most studies conducted in Serbia where linear sedimentation rates were assumed.  相似文献   

Geochemical Features of the Jurassic Terrigenous Sedimentary Complex of the Greater Caucasus     

Gavrilov  Yu. O. 《Lithology and Mineral Resources》2020,55(6):496-511

Lithology and Mineral Resources - The paper considers factors that determined the geochemical features of the Jurassic terrigenous complex of the northern Caucasus. It is shown that at the initial...  相似文献   

Diagenetic Mineral Formation in Biogenic Structures (Paleogene,Northeastern Caucasus)     

Gavrilov  Yu. O.  Shchepetova  E. V. 《Lithology and Mineral Resources》2000,35(6):546-555

Rare biogenic structures, after which diagenetic minerals are developed, are described from Paleogene rocks of southern Dagestan. It is shown that these minerals form tabular mica-like and colloform aggregates confined to fucoids. In terms of composition, they represent the glauconite group minerals. Tabular and colloform minerals are compared with globular glauconite occurring in host sandy rocks. It is demonstrated that the globular variety is characterized by higher K and Fe contents, whereas the tabular variety has a higher SiO₂ content. The probable mechanism of the formation of tabular and colloform minerals in biogenic structures is discussed.  相似文献   

Reconstruction of the Parameters of the Lower Midlatitude Ionosphere in M- and X-Class Solar Flares     

Gavrilov  B. G.  Ermak  V. M.  Lyakhov  A. N.  Poklad  Yu. V.  Rybakov  V. A.  Ryakhovsky  I. A. 《Geomagnetism and Aeronomy》2020,60(6):747-753

Geomagnetism and Aeronomy - The paper presents the results of the reconstruction of the effective height h' and the slope of the profile β of the electron concentration in the D layer of...  相似文献   

Assessment and forecast of the teleconnection between the Antarctic ozone and water vapor and the circulation and temperature of the lower thermosphere over the regions of Russia     

A. P. Kapitsa  A. A. Gavrilov 《Doklady Earth Sciences》2010,434(1):1200-1204

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Seismoacoustic emission and electromagnetic radiation of fractured rocks in deep wells     

A. K. Troyanov  B. P. D’yakonov  P. S. Martyshko  Yu. G. Astrakhantsev  N. I. Nachapkin  V. A. Gavrilov  N. A. Beloglazova 《Doklady Earth Sciences》2011,436(1):70-72

The results of simultaneous measurements in seismoacoustic emission (SAE) and electromagnetic radiation (EMR), carried out with the help of a program-apparatus complex developed at the Institute of Geophysics, Ural Division, Russian Academy of Sciences, are considered. Measurements have been carried out in the wells with varied structures located in Karelia, Yamal-Nenets Autonomous Area, and Kamchatka. It has been shown that intervals of fractured rocks are simultaneously recorded in anomalies of SAE and EMR signals. This fact allows us to detect these zones of high tensosensitivity in a geomedium volume for the purposes of monitoring in geodynamic phenomena in the Earth’s crust.  相似文献   

Modeling Residual Meridional Circulation at Different Phases of the Quasi-Biennial Oscillation     

Koval  A. V.  Gavrilov  N. M.  Pogoreltsev  A. I.  Efimov  M. M. 《Izvestiya Atmospheric and Oceanic Physics》2022,58(1):22-29

Izvestiya, Atmospheric and Oceanic Physics - The sensitivity of the residual meridional circulation (RMC) in the middle and upper atmosphere to the phase change of the quasi-biennial oscillation...  相似文献   

Analysis of the landscape structure in the tundra zone for western Siberia based on satellite data     

L. L. Golubyatnikov  E. A. Zarov  V. S. Kazantsev  I. V. Filippov  G. O. Gavrilov 《Izvestiya Atmospheric and Oceanic Physics》2015,51(9):969-978

The landscape structure are investigated for typical and southern tundra subzones of western Siberia based on satellite images from Landsat and WorldView. The microlandscape types for the considered regions are selected and areas of microlandscapes are defined on the basis of satellite information and accounting data of field studies. The areas of the main wetland landscapes in the different types of bogs in northwestern Siberia are defined.  相似文献   

Numerical simulation of the response of general circulation of the middle atmosphere to spatial inhomogeneities of orographic waves     

N. M. Gavrilov  A. V. Koval’  A. I. Pogorel’tsev  E. N. Savenkova 《Izvestiya Atmospheric and Oceanic Physics》2013,49(4):367-374

We have developed a parameterization of the dynamical and thermal effects of stationary orographic waves (SOWs) generated by the earth’s surface topography and included it into the general circulation model of the middle and upper atmosphere. We have analyzed the sensitivity of atmospheric general circulation at tropospheric to thermospheric altitudes to the impact of SOWs propagating from the troposphere. Changes in atmospheric circulation due to variations in the SOW generation and propagation have been considered for different seasons. It has been shown that, during solstices, the main dynamical and thermal impacts the middle atmosphere of winter hemispheres, where the SOW-induced changes in the velocity of zonal circulation can reach 30%. During equinoxes, the SOW impact is distributed more homogeneously between the Northern and Southern hemispheres, and the relative changes in the velocity of zonal circulation of the middle atmosphere may constitute 10%.  相似文献   

Parameterization of mesoscale stationary orographic wave forcing for use in numerical models of atmospheric dynamics     

N. M. Gavrilov  A. V. Koval 《Izvestiya Atmospheric and Oceanic Physics》2013,49(3):244-251

Polarization relations for mesoscale stationary orographic waves (MSOWs) and formulas for calculating vertical profiles of the total vertical flux of wave energy and amplitudes of horizontal speed are obtained by taking account the rotation of the atmosphere. Expressions are derived for the total wave heat flux, accelerations of the mean flow, and heat influxes generated by MSOWs. Calculations of the characteristics of MSOWs propagating in the atmosphere from the surface to the lower thermosphere are made. It was shown that MSOWs may significantly affect the circulation and thermal regime of the middle and upper atmosphere.  相似文献