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Usoltseva O. A. Ovtchinnikov V. M. Krasnoshchekov D. N. 《Izvestiya Physics of the Solid Earth》2021,57(1):84-97
Izvestiya, Physics of the Solid Earth - Abstract—The structure of seismic wavefield at distances close to antipodal is analyzed using two numerical methods—DSM and AXISEM—for... 相似文献
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V. M. Ovtchinnikov P. B. Kaazik D. N. Krasnoshchekov 《Izvestiya Physics of the Solid Earth》2012,48(3):211-221
Experimental data on the differential travel time t
BC–t
DF of seismic waves PKPDF and PKPBC in the Earth’s core under Africa and Australia are analyzed. The differential travel-time residuals beneath Africa in a narrow
range of angles from 21° to 25° between the direction of the seismic ray in the core and the Earth’s rotation axis exhibit
a scoop-shaped peculiarity not accounted for by cylindrical anisotropy in the inner core. A model with a 0.2–0.8% P-wave velocity anomaly with a radius of 1375 km in the cylindrical region in the outer core is proposed, which closely fits
the experimental data. We suggest that the velocity anomaly is generated by the dynamical processes occurring in the outer
core, namely, the growth of the inner core and the convection in the outer core, both leading to the formation of a low-density
anomaly in the outer core. 相似文献
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P. D. Gunin Ye. A. Vostokova A. Ya. Druk N. I. Dorofeyuk Yu. G. Yevstifeyev Yu. N. Krasnoshchekov 《地理信息系统科学与遥感》2013,50(1):71-76
This paper explores how such characteristics as the polarization of reflected radiation, the angular characteristics of its reflectance, and its thermal properties can be used to supplement conventional remote sensing studies of the condition of the vegetation cover. One possible application is clarified by means of an experiment testing the relationship between the degree of polarization of radiation reflected from cultivated cotton fields and the condition of the crop in those fields. Empirical data demonstrate that changes in the geometric structure of (and reflectance from) fields occurs when cultivated plants are subjected to stress (disease or moisture deprivation). Translated by Edward Torrey, Alexandria, VA 22308 from: L. N. Vasil'yev, ed., Kosmicheskiye metody izucheniya biosfery [Remote Sensing Methods in the Study of the Biosphere]. Moscow: Nauka, 1990, pp. 77–82. 相似文献
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Izvestiya, Physics of the Solid Earth - Abstract—The paper presents the review of the conceptually most important results of seismological studies of the Earth’s core and their... 相似文献
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Yu. N. Krasnoshchekov 《Geography and Natural Resources》2013,34(4):356-363
An analysis is made of the data from experimental investigations into the influence of fires on changes in the soil-protective functions of Siberian stone pine and pine forests in the southern part of the central ecological zone of the Baikal natural territory. The study revealed a negative influence of ground fires of the litter-humus type on changes in reserves and qualitative functional composition of forest litter and its moisture retention capacity as well as in water-physical properties of soils. Quantitative indices are provided for the liquid and solid overland runoff forming in burnt-over areas, depending on slope steepness, and on the intensity and temporal remoteness of past fires. 相似文献
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Krasnoshchekov D. N. Ovtchinnikov V. M. Usoltseva O. A. 《Doklady Earth Sciences》2019,488(2):1186-1189
Doklady Earth Sciences - Analysis of PKIIKP waves reflected off the inner surface of the solid core boundary and recorded close to the antipode indicates that the shear wave velocity at its top can... 相似文献
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Krasnoshchekov D. N. Ovtchinnikov V. M. Usoltseva O. A. 《Izvestiya Physics of the Solid Earth》2021,57(5):593-604
Izvestiya, Physics of the Solid Earth - Abstract—Based on the alpha-shape computer-graphics analysis of coda envelope of the waves from nuclear explosions reflected from the inner core... 相似文献