排序方式： 共有22条查询结果，搜索用时 20 毫秒
11.
D. A. Alekseev N. A. Palshin Iv. M. Varentsov 《Izvestiya Physics of the Solid Earth》2009,45(2):167-170
Numerical modeling is performed for seafloor magnetotelluric sounding in a 2-D offshore zone in a period range of 0.25–16 h. An anomaly of the seafloor longitudinal impedance observed at distances of 20–260 km from the shore is analyzed. Dispersion relations are violated for the longitudinal impedance within the anomalous zone. 相似文献
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N. I. Palshin S. R. Bogdanov G. E. Zdorovennova R. E. Zdorovennov T. V. Efremova B. Z. Belashev A. Yu. Terzhevik 《Water Resources》2018,45(5):695-705
The high-precision observational data on water temperature obtained during seven winters in a small boreal lake are considered. The spectral analysis revealed that the oscillations with a period of about 27 min prevailed in a water column. This period is close to the theoretical estimate of the first mode of the longitudinal barotropic seiche. The variability of temperature oscillations, vertical velocity, and displacement of isotherms suggest the presence of short internal waves along with seiches. The amplitude of the internal waves is an order of magnitude greater than that of seiches, and the length of internal waves is two orders of magnitude less than the linear extent of the lake. 相似文献
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Physics of seasonally ice-covered lakes: a review 总被引：2，自引：0，他引：2
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M. P. Petrov A. Yu. Terzhevik N. I. Palshin R. E. Zdorovennov G. E. Zdorovennova 《Water Resources》2005,32(5):496-504
Based on the analysis of data of many-year actinometric observations, a considerable temporal (interannual, seasonal, synoptic, and diurnal) and spatial variability of the albedo of the snow-and-ice cover of a shallow lake is shown. The ranges of variations in the albedo of snow and ice for a wide spectrum of the state of surface and weather conditions are presented. The variability of the thickness and structure of snow-and-ice cover is analyzed for different periods in winter. The results of field experiments aimed to determine the degree of absorption of solar radiation by snow and ice are presented. The effective coefficients of absorption of solar radiation by snow and ice are determined. The comparison of the observed and calculated values of the under-ice radiation has shown that the determined coefficients adequately describe the absorption of solar radiation by snow-and-ice cover. 相似文献
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V. M. Nikiforov G. N. Shkabarnya A. Yu. Zhukovin V. B. Kaplun N. A. Palshin I. M. Varentsov Do Huy Cuong Phung Van Phach Hoang Van Vuong S. S. Starzhinsky 《Russian Journal of Pacific Geology》2016,10(6):395-407
The transverse current anomalies evident from magnetotelluric sounding (MTS) data in the transition zone from the Asian continent to the Pacific Ocean and a geoelectrical model suitable for explaining these effects are discussed. Using simulation results and new MTS data on Sakhalin and northern Vietnam, ultra-deep fluid–fault system (UDFFS) models are constructed, comprising steeply dipping low-resistivity and high-resistivity linear bodies which penetrate through the whole section of the lithosphere, continuing deep into the asthenosphere. The structure of these systems reflects the development of deep and ultra-deep fault zones, along which mantle-originated fluids may migrate through sediments to reach the surface. This allows the anisotropic–conductive fractured structures adjacent to these faults to be considered as being most favorable for hydrocarbon accumulations. 相似文献
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Water Resources - Data of field measurements of water level variations and current velocities in Petrozavodsk Bay, Lake Onega, made in 2016–2017, are analyzed. Water level variations were... 相似文献
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1 研讨会概况
地球电磁法是地球物理学的重要方法,它是通过观测自然的和人工产生的电场、磁场或电磁场研究自地表到地幔深处的电性结构和空间环境.
由IAGA I-2 工作组主办的两年一届的"国际地球电磁感应学术研讨会"的目的是展示和交流各种电磁方法的最新研究成果和前沿研究课题.每次研讨会的举办地点经过竞争和选举确定,1972年在Edinburgh, U.K.举行了第1届研讨会. 相似文献
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L.V. Yegorov E.L. Chernyak N.A. Palshin T.A. Demidova P. Kaikkonen 《Physics of the Earth and Planetary Interiors》1983,33(1):56-63
The distortions of the electromagnetic-plane wave field, due to near-surface conductivity inhomogeneities, are considered. The real three-dimensional distribution of the shallow conductivity is approximated by Price's thin-sheet model. As low-frequency magnetotelluric variations are considered it is possible to neglect the self-induction in the thin sheet.The calculation of the current function has been carried out by the alternative Schwarz method. The method combines, in the iterative sense, the finite element solution in the inhomogeneous region and the analytical solution outside of it. The primary electric field is assumed to be circularly polarized. An example for the Baltic Shield shows that the telluric field is mostly very distorted. 相似文献