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51.
G. A. Abramson T. M. Bayankina S. V. Borodin M. V. Ivanchik E. I. Kalinin Yu. V. Kikhai Yu. B. Ratner A. A. Sizov D. M. Soloviev V. F. Shermazan 《Physical Oceanography》1998,9(5):353-361
The paper describes the functional scheme of the soft- and hardware complex designed to receive, to treat and to disseminate
satellite and reference hydrometeorological data. The complex displays a high degree of integration and unification of soft-
and hardware techniques and packages.
The operation of the complex is studied through the monitoring of cloud fields in the Atlantic-European section of the Northern
hemisphere during the winter-time synoptic season of 1995–1996. The complex is shown to be capable of identifying large-scale
cloud anomalies and of estimating their coherence in the individual regions of the Atlantic-European zone.
Translated by Vladimir A. Puchkin. 相似文献
52.
Peculiarities and ways of mapping the correlation function spatial distribution are considered by using a case study of the winter runoff and fall precipitation. In this work, the spatial regression method is applied for reconstructing the runoff map. Intercomparison assessment of this map with the original one has shown effectiveness of methods of mathematical cartographic modeling in hydrologic researches. 相似文献
53.
Analyzed is a phenomenon of the freezing rain observed in Perm krai on December 14, 2010, when the surface temperature was ?10.9°C. The process of cooling of falling drops is numerically simulated and their temperature is computed on the basis of the data of radio sounding of the atmosphere. It is demonstrated that the large-size drops do not have time to reach the supercooling state and, when falling to the ground, have a positive temperature. The finer drops are cooled to the negative temperature. An executed estimation of the process of transformation of falling drops into ice at the crystallization of the supercooled water demonstrated that the volume fraction of the ice crust of drops at the phase transition does not exceed 3% even under optimum cooling conditions. 相似文献
54.
E. A. Mareev S. Israelsson E. Knudsen A. V. Kalinin M. M. Novozhenov 《Annales Geophysicae》1997,14(10):1095-1101
The outdoor experiments, using a metallic grid above the ground surface, have yielded well-defined vertical profiles of the space-charge density. The profiles showed strong evidence for the existence of an electrode effect, which could be named the artificial electrode effect and can serve as a very useful and well-controlled model for the study of atmospheric electric processes in the atmospheric surface layer. The build-up or break-down of an electrode-effect layer occurred in a time of the order of 10 s under the experimental conditions realized. The artificially generated electrode effect is dependent on the electrical field strength supplied, wind speed, turbulent mixing and ion mobilities. Wind speed and ion mobility seem to be the dominant factors, defining space-charge density profiles. A theoretical model for the artificial electrode effect has been developed, taking into account turbulent mixing of charged particles in the air flow with the logarithmic profile of the wind velocity. The numerical analysis of the boundary value problem for the two-dimensional equations for the light ion concentrations has been performed. The model presented shows a qualitative agreement of calculated space-charge profiles with measured ones, and explains the dependence of the artificial electrode effect on the dominant control parameters. The limiting conditions for the developed theory are discussed.Permanent address: Institute of Appl. Physics, 46 Ulyanov St., 603600 Nizhny Novgorod, Russia 相似文献
55.
Stars similar to the Sun demonstrate super-flares, which are considerably more powerful than solar flares. It is believed that the magneticfield energies of these stars are much higher than that of the Sun. The present study attempts to explain such an anomalously high magnetic energy by resonance phenomena related to the stellar dynamo, which involve significant changes in the behavior of the solutions subject to certain external effects and satisfy certain parametric relationships. These resonance phenomena are studied using low-mode models for a dynamo occurring in two or one spherical shells. It is shown that resonance effects arising in these models can result in increases of the magnetic energies by one and a half orders of magnitude compared with nonresonance cases. It is also shown that resonance dynamo conditions can differ considerably from the simple resonance conditions used for oscillating systems. This can probably be explained by the fact that the excitation and propagation of magnetic waves in dynamo problems are closely connected with each other, so that the resonance equations remain nonlinear even when they are maximally simplified. 相似文献
56.
Yu. A. Kalinin G. A. Palyanova N. S. Bortnikov E. A. Naumov K. R. Kovalev 《Doklady Earth Sciences》2018,482(1):1193-1198
The supergene Au in weathering crusts of both the Suzdal and Raygorodok deposits is characterized by enhanced fineness, grain size, crystallinity, and the appearance of botryoidal aggregates of crystals. In the weathering crust of the Suzdal deposit, the exogenous Au is associated primarily with scorodite and carbonates; for Raygorodok, with chalcocite, bornite, hydrocarbonates and Cu hydrosulfates. The difference in the mineral associations of supergene Au at the deposits is determined by the occurrence of various mineral concentrators of Au in the primary endogenous substrate: arsenopyrite and pyrite at the Suzdal deposit and chalcopyrite with pyrite at the Raygorodok deposit. Due to the much greater mobility of Ag in the supergene zone, the weathering crusts are likely to contain submicron microinclusions of Ag minerals beyond the zones of Au concentration. 相似文献
57.
K.R. Kovalev S.O. Syzdykov Yu.A. Kalinin E.A. Naumov V.V. Baranov V.P. Sukhorukov A.S. Gladkov F.I. Zhimulev 《Russian Geology and Geophysics》2018,59(11):1482-1496
The Raigorodok stockwork gold-sulfide-quartz deposit is located in the contact zone of a monzogabbro-diorite intrusion belonging to the Stepnyak complex (442 Ma). Two main ore formation stages have been established: early, with disseminated gold-bearing pyrite-chalcopyrite mineralization related to skarn, propylite, and K-feldspar formation, and late, with productive mineralization. The late stage was accompanied by the formation of beresite, sericite, and quartz and comprised two substages: (1) quartz-gold-pyrite-chalcopyrite mineralization and (2) quartz-carbonate-gold-polysulfide mineralization. The 40Ar/39Ar ages of beresites and sericites are 422.9 ± 4.3 Ma and 416.7 ± 4.3 Ma, respectively, which is 19-22 Myr younger than the age of the host intrusion. The deposit ores formed stepwise, at temperatures of 112-335 °C and fluid salinity of 0.7-21.2 wt.% NaCl equiv. Sulfur for skarns, propylites, beresites, and ores might have been provided by a deep magma chamber, and the carbonaceous shales of the Vendian Sharyk Formation might have been the source of gold. The isotope and geochemical data and the results of fluid inclusion study suggest that Raigorodok is an intrusion-related deposit. At the same time, the deposit has a number of signs of porphyry-epithermal ore-magmatic systems. 相似文献
58.
V.?Yu.?ProkofievEmail author A.?A.?Kalinin K.?V.?Lobanov D.?A.?Banks A.?A.?Borovikov M.?V.?Chicherov 《Geology of Ore Deposits》2018,60(4):277-299
This study presents the first fluid inclusion data from quartz of albite–carbonate–quartz altered rocks and metasomatic quartzite hosting gold mineralization in the Pechenga structure of the Pechenga–Imandra–Varzuga greenstone belt. A temperature of 275–370°C, pressure of 1.2–4.5 kbar, and the fluid composition of gold-bearing fluid are estimated by microthermometry, Raman spectroscopy, and LA-ICP-MS of individual fluid inclusions, as well as by bulk chemical analyses of fluid inclusions. In particular, the Au and Ag concentrations have been determined in fluid inclusions. It is shown that albite–carbonate–quartz altered rocks and metasomatic quartzite interacted with fluids of similar chemical composition but under different physicochemical conditions. It is concluded that the gold-bearing fluid in the Pechenga structure is similar to that of orogenic gold deposits. 相似文献
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