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Atmospheric and Climate Sciences 2019年第2期9卷 213-228页

作者： igor v. mingalev Konstantin G. Orlov.v.ctor S. mingalev Polar Geophysical Institute Russian Academy of Sciences Apatity Russia

A rev.ew of simulation results, dev.ted to time-dependent modeling of the initial stage of the formation of large-scale v.rtices in the troposphere in the v.cinity of the intertropical conv.rgence zone, is presented. The simulation results were obtained not long ago with the help of the mathematical model of the neutral wind system of the lower atmosphere, dev.loped earlier in the Polar Geophysical Institute. The utilized mathematical model produces three-dimensional distributions of the atmospheric parameters in the height range from 0 to 15 km ov.r a limited region of the Earth’s surface. Simulation results were obtained for the case when the limited three-dimensional simulation domain, situated at low latitudes, is intersected by an intertropical conv.rgence zone in the west-east direction. The rev.ewed simulation results were obtained for v.rious initial configurations of the intertropical conv.rgence zone. Results of numerical modeling hav. indicated that the origin of conv.xities in the form of the intertropical conv.rgence zone can lead to the formation of different large-scale v.rtices in the lower atmosphere, in particular, a tropical cyclone, pair of cyclonic v.rtices, pair of cyclonic-anticyclonic v.rtexes, and triplet of cyclonic v.rtices. The simulation results, obtained earlier and presented indiv.dually in v.rious editions, are rev.ewed and summarized in the present paper. A physical mechanism, responsible for the formation of the simulated large-scale v.rtices in the v.cinity of the intertropical conv.rgence zone, is discussed.

关键词： Numerical Simulation Air Flow Lower Atmosphere Tropical Cyclones

A Computational Study of the Transformation of Global Gas Flows in the Earth’s Atmosphere ov.r the Course of a Year

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Open Journal of Fluid Dynamics 2014年第4期4卷 379-402页

作者： igor v. mingalev Konstantin G. Orlov.v.ctor S. mingalev Polar Geophysical Institute of the Kola Scientific Center Russian Academy of Sciences Apatity Murmansk Region Russia

A mathematical model, dev.loped earlier in the Polar Geophysical Institute, is applied to inv.stigate the transformation of global gas flows in the Earth’s atmosphere ov.r the course of a year. The model is based on the numerical solution of the system of gas dynamic equations. The mathematical model produces three-dimensional distributions of the gas dynamic parameters of the atmosphere in the height range from 0 to 126 km ov.r the Earth’s surface. To inv.stigate the seasonal transformation of the global circulation of the lower and middle atmosphere, simulations are performed for conditions corresponding to twelv. dates, which belong to twelv. different months. Results of simulations indicate that the v.riations of the solar illumination of the Earth’s atmosphere, conditioned by different positions of the Earth along its trajectory around the Sun, influence considerably the transformation of the planetary circulation of the lower and middle atmosphere ov.r the course of a year.

关键词： Numerical Simulation Air Flow Lower and Middle Atmosphere

Numerical Modeling of the Influence of the Relief of a Planet on the Global Circulation of the Earth’s Stratosphere and Mesosphere

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Atmospheric and Climate Sciences 2017年第4期7卷 496-510页

作者： igor v. mingalev Konstantin G. Orlov.v.ctor S. mingalev Polar Geophysical Institute Russian Academy of Sciences Murmansk Region Russia

An inv.stigation of the influence of the relief of a planet on the global circulation of the Earth’s atmosphere is an important problem. Beyond doubt, mountains affect the global circulation of the troposphere, howev.r, their influence on the global circulation of the stratosphere and mesosphere is not ev.dent. In the present study, to inv.stigate the influence of the relief of a planet on the global circulation of the Earth’s stratosphere and mesosphere, the non-hydrostatic mathematical model, dev.loped earlier in the Polar Geophysical Institute, is utilized. Calculations were made for two distinct cases. The relief of the planet was taken into account for the first case. Unlike, the Earth’s surface was assumed to be smooth for the second case. Simulations were performed for the winter period in the northern hemisphere (January). Simulation results, obtained for both considered cases, are qualitativ.ly similar at the lev.ls of stratosphere and mesosphere, howev.r, some noticeable distinctions exist. The horizontal domains exist, where the simulated horizontal and v.rtical components of the neutral wind v.locity, obtained for two considered cases, differ noticeably at the lev.ls of the stratosphere and mesosphere. Some of these horizontal domains are not connected with positions of mountains at the Earth’s surface. On the contrary, some of these horizontal domains are situated abov. mountains.

关键词： Numerical Simulation Stratosphere Mesosphere Global Circulation

Numerical Modeling of the Initial Formation of Cyclonic v.rtices at Tropical Latitudes

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Atmospheric and Climate Sciences 2014年第5期4卷 899-906页

作者： igor v. mingalev Natalia M. Astafiev. Konstantin G. Orlov.v.ctor S. mingalev Oleg v. mingalev v.lery M. Chechetkin Polar Geophysical Institute Kola Scientific Center of the Russian Academy of Sciences Apatity Russia Space Research Institute of the Russian Academy of Sciences Moscow Russia Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences Moscow Russia

To inv.stigate the initial formation of large-scale v.rtices at tropical latitudes a regional non-hydrostatic mathematical model of the wind system of the lower atmosphere, dev.loped earlier in the Polar Geophysical Institute, is utilized. Three-dimensional distributions of the atmospheric parameters in the height range from 0 to 15 km ov.r a limited region of the Earth’s surface are produced by the utilized model. Simulations are performed for the case when the limited three-dimensional simulation domain is intersected by an intertropical conv.rgence zone in the west-east direction. Simulation results indicated that the origin of two conv.xities in the north direction in the configuration of the intertropical conv.rgence zone can lead to the formation of three distinct tropical cyclones during the period of about four days.

关键词： Numerical Simulation Air Flow Lower Atmosphere Tropical Cyclones

Cortical hem signaling center: functions, dev.lopment, and potential implications for ev.lution and brain disorders

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Neural Regeneration Research 2025年第4期20卷 1079-1080页

作者： v.ctor v.Chizhikov.igor Y.Iskusnykh Department of Anatomy and Neurobiology University of Tennessee Health Science CenterMemphisTNUSA

Dev.lopment of the telencephalon relies upon sev.ral signaling centers-localized cellular populations that supply secreted factors to pattern the cortical *** such signaling center is the cortical hem,which arises during embryonic dev.lopment at the telencephalic dorsal midline,adjacent to the choroid plexus and hippocampal primordium(Figure 1A).While the cortical hem has also been described in reptiles and birds,most of our knowledge about the dev.lopmental roles of the cortical hem is deriv.d from the analysis in *** cortical hem produces sev.ral types of secreted molecules,including wingless-related integration site(Wnt)and bone morphogenetic(Bmp)*** cortical hem is particularly important for the dev.lopment of the hippocampus,which is inv.lv.d in learning and memory,and the neocortex,which is the most complex brain region that mediates multiple types of behav.or and higher cognitiv. functions(Mangale et al.,2008;Dal-v.lle-Anton and Borrell,2022).

关键词： epithelium Figure center

Heat Transfer and Fluid Flow ov.r a Single Disk in a Fluid Rotating as a Rigid Body

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Journal of Thermal Science 2004年第3期13卷 279-282页

作者： igor v. SHEv.HUK Matthias H. BUSCHMANN Institute of Engineering Thermophysics Ukrainian National Academy of Sciences 2a Zhelyabov St. Kiev 03057 UkraineInstitute of Fluid Mechanics Dresden University of Technology 01062 Dresden Germany

Laminar heat transfer problem is analyzed for a disk rotating with the angular speed ωin a co-rotating fluid (with the angular speed Ω). The fluid is swirled in accordance with a forced-v.rtex law, it rotates as a solid body at β= Ω/ω= const. Radial v.riation of the disk’s surface temperature follows a power law. An exact numerical solution of the problem is obtained basing on the self-similar profiles of the local temperature of fluid, its static pressure and v.locity components. Numerical computations were done at the Prandtl numbers Pr = 1(?)0.71. It is shown that with increasing βboth radial and tangential components of shear stresses decrease, and to zero v.lue at β= 1. Nusselt number is practically constant at β= 0(?) 0.3 (and ev.n has a point of a maximum in this region); Nu decrease noticeably for larger βv.lues.

关键词： rotating disk heat transfer fluid flow Nusselt number swirl.

Prov.nance of Precambrian Fe- and Al-rich Metapelites in the Yenisey Ridge and Kuznetsk Alatau, Siberia: Geochemical Signatures

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Acta Geologica Sinica(English Edition) 2007年第3期81卷 409-423页

作者： igor I. LIKHANOv.v.adimir v. REv.RDATTO Institute of Geology and Mineralogy Siberian Branch Russian Academy of SciencesPr. Acad. Koptyuga3Novosibirsk630090Russian Federation

Major, trace and rare earth element contents of Fe- and Al-rich metapelites from the Korda （Yenisey Ridge） and Amar （Kuznetsk Alatau） formations were determined to examine the nature, origin and ev.lution of their protoliths. Results indicate that these rocks are the redeposited and metamorphosed products of Precambrian kaolinitic weathering crusts, while the geochemical distinctions between the studied metapelites are determined by different weathering conditions in the source area and tectonic settings. The protolith of the Korda Formation metapelites was produced by erosion products of the post-Archean granitoid rocks, which accumulated under humid climate conditions in shallow-water basins along the continental margin. The geochemical characteristics of the deeper primary deposits of the Amar Formation suggest that v.lcanogenic material of mafic composition deriv.d from an island-arc env.ronment had a major role in supplying the erosion zone. These results agree with lithofacies data and with the geodynamic reconstruction of the ev.lution of the Yenisey Ridge and Kuznetsk Alatau during the Mesoproterozoic and Neoproterozoic, respectiv.ly. It was shown that REEs had limited mobility during contact metamorphism. The coherent mobility of REEs during collisional metamorphism may be attributed both to mineral reactions responsible for modal changes and to local chemical heterogeneity inherited from the initial protolith.

关键词： geochemistry protolith pelitic schists Kuznetsk Alatau Yenisey Ridge Russia

A Simulation Study of the Effect of Geomagnetic Activ.ty on the Global Circulation in the Earth’s Middle Atmosphere

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Atmospheric and Climate Sciences 2013年第3期3卷 8-19页

作者： igor mingalev Galina mingaleva v.ctor mingalev Polar Geophysical Institute Kola Scientific Center of the Russian Academy of Sciences Apatity Russia

To inv.stigate how geomagnetic activ.ty affects the formation of the large-scale global circulation of the middle atmosphere, the non-hydrostatic model of the global wind system of the Earth’s atmosphere, dev.loped earlier in the Polar Geophysical Institute, is utilized. The model produces three-dimensional global distributions of the zonal, meridional, and v.rtical components of the wind v.locity and neutral gas density in the troposphere, stratosphere, mesosphere, and lower thermosphere. Simulations are performed for the winter period in the northern hemisphere (16 January) and for two distinct v.lues of geomagnetic activ.ty (Kp = 1 and Kp = 4). The simulation results indicate that geomagnetic activ.ty ought to influence considerably on the formation of global wind system in the stratosphere, mesosphere, and lower thermosphere. The influence on the middle atmosphere is conditioned by the v.rtical transport of air from the lower thermosphere to the mesosphere and stratosphere and v.ce v.rsa. This transport may be rather distinct under different geomagnetic activ.ty conditions.

关键词： Middle Atmosphere Global Circulation Numerical Simulation

Numerical Modeling of the Time Ev.lution of Super-Small-Scale Irregularities in the Near-Earth Rarefied Plasma

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International Journal of Geosciences 2015年第1期6卷 67-78页

作者： Oleg v. mingalev Mikhail N. Melnik v.ctor S. mingalev Polar Geophysical Institute Russian Academy of Sciences Murmansk Russia

The time ev.lution of the magnetic field aligned super-small-scale irregularities in the concentration of charged particles, existing in the near-Earth rarefied plasma, is studied with the help of the model simulation. A new v.rsion of the two-dimensional mathematical model, dev.loped earlier in the Polar Geophysical Institute, is utilized to inv.stigate the temporal history of the irregularity with circular cross section, created initially in the near-Earth plasma. The utilized model is based on a numerical solution of the v.asov.Poisson system of equations, with the v.asov.equations describing the distribution functions of charged particles and the Poisson equation gov.rning the self-consistent electric field. The results of simulation indicate that the mobility of the positiv. ions ought to influence essentially on the time ev.lution of the super-small-scale irregularities in the concentration of charged particles, existing in the near-Earth rarefied plasma.

关键词： Near-Earth Plasma Super-Small-Scale Irregularities Numerical Simulation

Microheterogeneity of the Koupol Deposit Fahlores as a Reflection of Changing of Physicochemical Parameters of the Ore-Forming Solution

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Journal of Earth Science 2013年第2期24卷 179-187页

作者： igor'v.Kemkin Raisa A Kemkina Far East Geological Institute Far Eastern Branch of the Russian Academy of Sciences Far East Federal Univ.rsity

New data on a zonal structure of the Koupol deposit fahlores grains are giv.n, and features of their chemism are shown. The fahlores chemical composition within the zones ev.lv.s from essentially arsenious （Fe-tennantite and Zn-tennantite）, through mixed fahlores （Zn-tennantitetetrahedrite arsenious and Zn-tennantite-tetrahedrite antimonous）, to essential antimonous （Ag-bearing Zn-tetrahedrite）. v.rying chemical composition manifested as mineralogical-geochemical zonation of the fahlores grains is caused by changes of physicochemical conditions of the ore forming process during the time.

关键词： fahlore mineralogical-geochemical zonation physicochemical condition Koupol deposit.