排序方式： 共有33条查询结果，搜索用时 31 毫秒
1.
A. A. Zhamaletdinov A. N. Shevtsov E. P. Velikhov A. A. Skorokhodov V. E. Kolesnikov T. G. Korotkova P. A. Ryazantsev B. V. Efimov V. V. Kolobov M. B. Barannik P. I. Prokopchuk V. N. Selivanov Yu. A. Kopytenko E. A. Kopytenko V. S. Ismagilov M. S. Petrishchev P. A. Sergushin P. E. Tereshchenko B. V. Samsonov M. A. Birulya M. Yu. Smirnov T. Korja Yu. M. Yampolski A. V. Koloskov N. A. Baru S. V. Poljakov A. V. Shchennikov G. I. Druzhin W. Jozwiak J. Reda Yu. G. Shchors 《Izvestiya Atmospheric and Oceanic Physics》2015,51(8):826-857
2.
Changes in the directionality of surface high-frequency geoacoustic emission during periods of deformational disturbances
on the diurnal time scale prior to strong seismic events on Kamchatka have been investigated. It has been shown that while
the emission intensity grows by over an order of magnitude, sharp maxima appear in the direction of longitudinal acoustic
oscillations. Based on their position, the orientation of the major compression axis can be determined, whose chaotic motion
exhibits two metastable states around the direction to the epicenter of the earthquake. 相似文献
3.
The results of Rayleigh lidar sounding of the upper atmosphere over Kamchatka are analyzed in comparison with ionosonde data. A correlation between light backscattering signals at a wavelength of 532 nm and parameters determining the content of plasma in the nocturnal F2 layer of the ionosphere is found. Based on the performed analysis of lidar data and the geophysical situation, a hypothesis about the possible role of Rydberg atoms in the formation of lidar reflections at ionospheric heights is discussed. 相似文献
4.
A. A. Cheremisin P. V. Novikov I. S. Shnipov V. V. Bychkov B. M. Shevtsov 《Geomagnetism and Aeronomy》2012,52(5):653-663
Lidar observations during 2007–2008 in Kamchatka revealed aerosol layers in the upper stratosphere at heights of 35–50 km and in the mesosphere at heights of 60–75 km. It is well known that forces of gas-kinetic nature, i.e., photophoretic forces, act on aerosol particles that absorb solar radiation and terrestrial IR radiation; these forces can counteract the gravitational force and even lead to the levitation of these particles at particular heights. The accumulation of particles at these heights may lead to the formation of aerosol layers. We calculated these forces for the conditions of lidar observations in Kamchatka. Aerosol layers were observed at heights where particle levitation can occur. Thus, the stratospheric and mesospheric aerosol layers, detected at heights of 30–50 and 60–75 km, respectively, may be due to the effect of the photophoretic force on aerosol particles. 相似文献
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6.
A. A. Zhamaletdinov A. N. Shevtsov T. G. Korotkova Yu. A. Kopytenko V. S. Ismagilov M. S. Petrishev B. V. Efimov M. B. Barannik V. V. Kolobov P. I. Prokopchuk M. Yu. Smirnov S. A. Vagin M. I. Pertel E. D. Tereshchenko A. N. Vasil’ev V. F. Grigoryev M. B. Gokhberg V. I. Trofimchik Yu. M. Yampolsky A. V. Koloskov A. V. Fedorov T. Korja 《Izvestiya Physics of the Solid Earth》2011,47(1):2-22
The paper addresses the technique and the first results of a unique experiment on the deep tensor frequency electromagnetic sounding, the Fennoscandian Electrical conductivity from results of sounding with Natural and Controlled Sources (FENICS). In the experiment, Energy-1 and Energy-2 generators with power of up to 200 kW and two mutually orthogonal industrial 109- and 120-km-long power transmission lines were used. The sounding frequency range was 0.1–200 Hz. The signals were measured in the Kola-Karelian region, in Finland, on Svalbard, and in Ukraine at distances up to 2150 km from the source. The parameters of electric conductivity in the lithosphere are studied down to depths on the order of 50–70 km. A strong lateral homogeneity (the one-dimensionality) of a geoelectric section of the Earth’s crust is revealed below depths of 10–15 km. At the same time, a region with reduced transverse crustal resistivity spread over about 80 000 square kilometers is identified within the depth interval from 20 to 40 km. On the southeast the contour of the anomaly borders the zone of deepening of the Moho boundary down to 60 km in Central Finland. The results are compared with the AMT-MT sounding data and a geodynamic interpretation of the obtained information is carried out. 相似文献
7.
A. A. Zhamaletdinov M. S. Petrishchev A. N. Shevtsov V. V. Kolobov V. N. Selivanov M. B. Barannik E. D. Tereshchenko V. F. Grigoriev P. A. Sergushin E. A. Kopytenko M. A. Biryulya A. A. Skorokhodov O. A. Esipko R. V. Damaskin 《Izvestiya Physics of the Solid Earth》2013,49(6):844-858
Electromagnetic soundings with the fields of natural (magnetotelluric (MT), and audio magnetotelluric (AMT)) and high-power controlled sources have been carried out in the region of the SG-6 (Tyumen) and SG-7 (En-Yakhin) superdeep boreholes in the Yamal-Nenets autonomous district (YaNAD). In the controlled-source soundings, the electromagnetic field was generated by the VL Urengoi-Pangody 220-kV industrial power transmission line (PTL), which has a length of 114 km, and ultralow-frequency (ULF) Zevs radiating antenna located at a distance of 2000 km from the signal recording sites. In the soundings with the Urengoi-Pangody PTL, the Energiya-2 generator capable of supplying up to 200 kW of power and Energiya-3 portable generator with a power of 2 kW were used as the sources. These generators were designed and manufactured at the Kola Science Center of the Russian Academy of Sciences. The soundings with the Energiya-2 generator were conducted in the frequency range from 0.38 to 175 Hz. The external generator was connected to the PTL in upon the agreement with the Yamal-Nenets Enterprise of Main Electric Networks, a branch of OAO FSK ES of Western Siberia. The connection was carried out by the wire-ground scheme during the routine maintenance of PTL in the nighttime. The highest-quality signals were recorded in the region of the SG-7 (En-Yakhin) superdeep borehole, where the industrial noise is lowest. The results of the inversion of the soundings with PTL and Zevs ULF transmitter completely agree with each other and with the data of electric logging. The MT-AMT data provide additional information about the deep structure of the region in the low-frequency range (below 1Hz). It is established that the section of SG-6 and SG-7 boreholes contains conductive layers in the depth intervals from 0.15 to 0.3 km and from 1 to 1.5 km. These layers are associated with the variations in the lithological composition, porosity, and fluid saturation of the rocks. The top of the poorly conductive Permian-Triassic complex is identified at a depth of about 7 km. On the basis of the MT data in the lowest frequency band (hourly and longer periods) with the observations at the Novosibirsk observatory taken into account, the distribution of electric resistivity up to a depth of 800 km is reconstructed. This distribution can be used as additional information when calculating the temperature and rheology of the lithosphere and upper mantle in West Siberia. The results of our studies demonstrate the high potential of the complex electromagnetic soundings with natural and controlled sources in the study of deep structure of the lithosphere and tracing deep oil-and-gas-bearing horizons in the sedimentary cover of the West Siberian Platform within the Yamal-Nenets autonomous district. 相似文献
8.
Izvestiya, Atmospheric and Oceanic Physics - We consider methods for calculating the distribution of the temperature and rheological parameters (differential stresses) in the lithosphere using... 相似文献
9.
Yu. V. Marapulets O. P. Rulenko M. A. Mishchenko B. M. Shevtsov 《Doklady Earth Sciences》2010,431(1):361-364
In July–October 2006 and 2007, combined measurements of geoacoustic emission in the range of 2.0–6.5 kHz, the electric field
in the atmosphere near the ground, and meteorological values were carried out in Kamchatka. Using the nonparametric method
of Spearman’s correlation analysis, the relationship between their average hourly values was examined. After excluding results
of bad weather (rain, strong and moderate wind, low atmospheric pressure), a highly important negative relation between disturbances
in geoacoustic emission and the electric field were detected. Most probably, it was caused by amplification of the strain
of near-surface sedimentary rocks at the observation point during a seismotectonic process. The revealed relation is evidence
for another manifestation of the lithosphere’s influence on surface atmosphere in a seismoactive region. 相似文献
10.
V. V. Bychkov A. S. Perezhogin B. M. Shevtsov V. N. Marichev P. V. Novikov A. A. Cheremisin 《Izvestiya Atmospheric and Oceanic Physics》2011,47(5):603-609
The behavior of the vertical aerosol structure (profiles of the ratio of the coefficients of the backward total and molecular scattering) in the height interval 30–80 km is analyzed from the results of lidar observations in Kamchatka over the period from October 2007 through December 2009. The obtained data revealed a regular two-layer aerosol structure in this height range with the maxima of the ratio of the scattering coefficients in the upper stratosphere at heights 35–50 km and in the mesosphere at heights of 60–75 km, as well as a relation between seasonal variations in the aerosol stratification and the circumpolar vortex affecting dynamic processes in the atmosphere of midlatitudes. The procedure of including the aftereffect of the Hamamatsu-M8259-01 PEM, which influences the error in the calculation of the ratio of scattering coefficients, is described. 相似文献