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21.
E.B. Fainberg B.Sh. Singer A.V. Kuvshinov 《Physics of the Earth and Planetary Interiors》1983,32(4):293-300
The results of numerical simulation of electromagnetic fields induced in the world's oceans by solar daily variations are discussed. Some examples of apparent resistivity curves simulated for continental and ocean regions are demonstrated. 相似文献
22.
滇池水中铝的形态分布初探 总被引:2,自引:1,他引:2
采用铬天青S光度法对滇池水中的总铝和各主要形态铝进行分析,并利用简单易行的紫外吸收表征水中有机物污染程度和颗粒物含量,初步探讨了各因素的变化对铝形态分布的影响。 相似文献
23.
B. Sh. Singer 《Surveys in Geophysics》1992,13(4-5):309-340
Subsurface inhomogeneities can be classified in three categories depending on the comparison of their sizes against the effective skin depth and “adjustment distance”. These categories are geological noise, local and regional inhomogeneities. Due to its random nature, geological noise leads to uncontrollable distortions of the magnetotelluric field. Such methods as curve shifting, distortion tensor techniques, decomposition and spatial filtering can effectively be used to correct for static shift caused by geological noise. It is shown that the effects of local and regional subsurface inhomogeneities reduce to static shifts of MT-curves when rather rigid conditions are satisfied. The methods used to suppress the effect of geological noise have limited applicability to local and regional inhomogeneities, which can be accurately accounted for only by modelling. 相似文献
24.
M.E. ArtemjevV.I. Bune V.A. DubrovskyN.Sh. Kambarov 《Physics of the Earth and Planetary Interiors》1972,6(4):256-262
Both a theoretical treatment and observed data show that the isostatic gravity field and the seismicity are closely related. The equation for harmonic loading shows that large deviations from isostatic equilibrium lead to large shear stresses in the crust. High seismic activity correlates well with large isostatic gravity anomalies and with large horizontal gradients of isostatic gravity anomalies. Studies of seismicity should consider the isostatic gravity field. 相似文献
25.
Sh. B. Akhmedov G. B. Gelfreikh F. Fürstenberg J. Hildebrandt A. Krüger 《Solar physics》1983,88(1-2):103-108
Model calculations of the S-component are compared with observations of the RATAN-600 telescope at five discrete microwave frequencies referring to active region McMath No. 15974 on May 1, 1979. The spectral variations of source diameter, flux density, and degree of polarization are used to derive the height scale of the magnetic field in accordance with a magnetic dipole distribution under the assumption of advanced temperature and electron density distributions according to most recent EUV observations. 相似文献
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Sh. Sh. Dolginov Ye. G. Yeroshenko V. A. Sharova T. A. Vnuchkova L. L. Vanyan B. A. Okulessky A. T. Bazilevsky 《Earth, Moon, and Planets》1976,15(1-2):3-14
The data of three-times repeated magnetic survey of the section of Lunokhod-2 route 1.5 km long are analyzed. The linear size of the regions of magnetic field anomalies disclosed is 200–300 m. The results of magnetic survey near the tectonic break of Straight Rille and near the south rim of crater Le Monnier were used for estimation of rock magnetization in situ. It is shown that mare basalts in south-east region of crater Le Monnier have oblique magnetization (at the angle ç30° to horizon). The magnitude of magnetization is × 5 × 10–5 G cm g–1. The south-east slope of the crater Le Monnier is magnetized roughly vertically, the upper limit of magnetization of the rocks of the rim is ç 1 × 10–5 G cm3 g–1. The results of an analysis of 160 magnetic field variations recorded by Lunokhod-2 indicate that the horizontal components of variations have nearly linear polarization. The principal axes of hodographs stretch in the direction north-west-south-east. Such a polarization of variations may be due to an increase of the thickness of the upper isolated layer under Mare Serenitatis. 相似文献
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Water availability in Georgia is estimated for two 40-year periods (1921–1960 and 1961–2000). A map is presented to show excessive and deficient water resources in Georgia and their variations under global climate changes. 相似文献