A sociodemographic typology of middle-level regions in the USSR     

Fedorov GM 《Soviet geography》1983,24(4):289-297

"Oblast-level regions of the USSR are grouped and mapped in nine types and a number of subtypes to reflect a combination of demographic factors: level of urbanization, urban and rural population growth, and population density. The typology can be used to devise sets of spatially differentiated measures to carry out a demographic policy and to regulate the sociodemographic evolution of regions."  相似文献   

Diamond stability in NaCl and NaF melts at high pressure     

V. M. Sonin  E. I. Zhimulev  A. I. Chepurov  I. I. Fedorov 《Doklady Earth Sciences》2008,420(1):641-643

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Sedimentation rates in the sea of Azov inferred from <Superscript>137</Superscript>Cs and <Superscript>241</Superscript>Am specific activity     

Yu. A. Fedorov  A. N. Kuznetsov  M. E. Trofimov 《Doklady Earth Sciences》2008,423(1):1333-1334

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Vegetation and climate changes in northwestern Russia during the Lateglacial and Holocene inferred from the Lake Ladoga pollen record     

Larisa A. Savelieva  Andrei A. Andreev  Raphael Gromig  Dmitry A. Subetto  Grigory B. Fedorov  Volker Wennrich  Bernd Wagner  Martin Melles 《Boreas: An International Journal of Quaternary Research》2019,48(2):349-360

The new pollen record from the upper 12.75 m of a sediment core obtained in Lake Ladoga documents regional vegetation and climate changes in northwestern Russia over the last 13.9 cal. ka. The Lateglacial chronostratigraphy is based on varve chronology, while the Holocene stratigraphy is based on AMS ¹⁴C and OSL dates, supported by comparison with regional pollen records. During the Lateglacial (c. 13.9–11.2 cal. ka BP), the Lake Ladoga region experienced several climatic fluctuations as reflected in vegetation changes. Shrub and grass communities dominated between c. 13.9 and 13.2 cal. ka BP. The increase in Picea pollen at c. 13.2 cal. ka BP probably reflects the appearance of spruce in the southern Ladoga region at the beginning of the Allerød interstadial. After c. 12.6 cal. ka BP, the Younger Dryas cooling caused a significant decrease in spruce and increase in Artemisia with other herbs, indicative of tundra‐ and steppe‐like vegetation. A sharp transition from tundra‐steppe habitats to sparse birch forests characterizes the onset of Holocene warming c. 11.2 cal. ka BP. Pine forests dominated in the region from c. 9.0 to 8.1 cal. ka BP. The most favourable climatic conditions for deciduous broad‐leaved taxa existed between c. 8.1 and 5.5 cal. ka BP. Alder experiences an abrupt increase in the local vegetation c. 7.8 cal. ka BP. The decrease in tree pollen taxa (especially Picea) and the increase in herbs (mainly Poaceae) probably reflect human activity during the last 2.2 cal. ka. Pine forests have dominated the region since that time. Secale and other Cerealia pollen as well as ruderal herbs are permanently recorded since c. 0.8 cal. ka BP.  相似文献   

Helicopter Crash on the Spitsbergen Archipelago: Infrasound and Seismic Signals Decryption     

Vinogradov  Yu. A.  Fedorov  A. V. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(7):779-784

Izvestiya, Atmospheric and Oceanic Physics - A Convers Avia Airline Mi-8 helicopter crashed near the Russian settlement of Barentsburg on October 26, 2017. The moment of impact was recorded by the...  相似文献   

AMOC sensitivity to surface buoyancy fluxes: Stronger ocean meridional heat transport with a weaker volume transport?     

Florian Sévellec  Alexey V. Fedorov 《Climate Dynamics》2016,47(5-6):1497-1513

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The Deep Velocity Structure of the Central Kola Peninsula Obtained using the Receiver Function Technique     

Adushkin  V. V.  Goev  A. G.  Sanina  I. A.  Fedorov  A. V. 《Doklady Earth Sciences》2021,501(2):1049-1051

Doklady Earth Sciences - New results are presented on the features of the deep velocity structure of two of the three main tectonic blocks that make up the Kola region—Murmansk and...  相似文献   

Age and composition of ophiloites from the basement of the West Siberian petroliferous megabasin     

K. S. Ivanov  Yu. N. Fedorov  E. O. Amon  Yu. V. Erokhin  G. N. Borozdina 《Doklady Earth Sciences》2007,413(3):415-419

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Inclusions of metal solvent and color of boron-bearing monocrystals of synthetic diamond     

A. I. Chepurov  E. I. Zhimulev  I. I. Fedorov  V. M. Sonin 《Geology of Ore Deposits》2007,49(7):648-651

Cuboctahedral diamond monocrystals of physical classification type IIb weighing from 0.1 to 2 carats and with minor faces {110}, {311}, and {511} have been synthesized. The crystals are characterized by various hues of blue and dark blue depending on the amount of B in the system. A characteristic feature of these diamonds is a sectorial structure expressed in a nonuniform color distribution. The following types of metallic inclusions in the crystals have been recognized: faceted isometric, lamellar, and extended inclusions; unfaceted irregular and drop-shaped inclusions; and microinclusions. These inclusions are related to the chemical composition of the metal solvent.  相似文献   

Regularities of C<Subscript>org</Subscript> distribution in bottom sediments of the Russian part of the Sea of Azov     

Yu. A. Fedorov  I. V. Dotsenko  A. N. Kuznetsov  A. A. Belov  E. A. Loginov 《Oceanology》2009,49(2):211-217

The principal regularities were ascertained for the spatiotemporal distribution of organic carbon in the water and bottom sediments of the Russian part of the Sea of Azov. The relationships between allo- and autochthonous organic matter in water and bottom sediments from different parts of the sea aquatic area were found. The behavior of organic carbon in the water-bottom sediments system was characterized as the effect of the variability of hydrochemical, biological, and hydrological factors ad processes.  相似文献