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    Effects of MHD shocks propagating along magnetic flux tubes in a dipole magnetic field
[Text] : статья / N.V. Erkaev, V.A. Shaidurov, V.S. Semenov, H.K. Biernat // Nonlinear Processes in Geophysics. - 2002. - Vol. 9. - p. 163-172

Аннотация: Variations of the plasma pressure in a magnetic flux tube can produce MHD waves evolving into shocks. In the case of a low plasma beta, plasma pressure pulses in the magnetic flux tube generate MHD slow shocks propagating along the tube. For converging magnetic field lines, such as in a dipole magnetic field, the cross section of the mag-netic flux tube decreases enormously with increasing mag-netic field strength. In such a case, the propagation of MHD waves along magnetic flux tubes is rather different from that in the case of uniform magnetic fields. In this paper, the propagation of MHD slow shocks is studied numerically us-ing the ideal MHD equations in an approximation suitable for a thin magnetic flux tube with a low plasma beta. The results obtained in the numerical study show that the jumps in the plasma parameters at the MHD slow shock increase greatly while the shock is propagating in the narrowing mag-netic flux tube. The results are applied to the case of the interaction between Jupiter and its satellite Io, the latter be-ing considered as a source of plasma pressure pulses.

http://icm.krasn.ru/refextra.php?id=2437,
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Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44

Доп.точки доступа:
Shaidurov, V.A.; Шайдуров В.А.; Semenov, V.S.; Семенов В. С.; Biernat, H.K.; Еркаев, Николай Васильевич

    Two-dimensional MHD model of the reconnection diffusion region
[Text] : статья / N.V. Erkaev, V.S. Semenov, H.K. Biernat // Nonlinear Processes in Geophysics. - 2002. - Vol. 9, № 2. - p. 131–138 . - ISSN 1023-5809

Аннотация: Magnetic reconnection is an important process providing a fast conversion of magnetic energy into thermal and kinetic plasma energy. In this concern, a key problem is that of the resistive diffusion region where the reconnec-tion process is initiated. In this paper, the diffusion region is associated with a nonuniform conductivity localized to a small region. The nonsteady resistive incompressible MHD equations are solved numerically for the case of symmetric reconnection of antiparallel magnetic fields. A Petschek type steady-state solution is obtained as a result of time relax-ation of the reconnection layer structure from an arbitrary initial stage. The structure of the diffusion region is studied for various ratios of maximum and minimum values of the plasma resistivity. The effective length of the diffusion re-gion and the reconnection rate are determined as functions of the length scale and the maximum of the resistivity. For suf-ficiently small length scale of the resistivity, the reconnection rate is shown to be consistent with Petschek's formula. By increasing the resistivity length scale and decreasing the re-sistivity maximum, the reconnection layer tends to be wider, and correspondingly, the reconnection rate tends to be more consistent with that of the Parker-Sweet regime.

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http://icm.krasn.ru/refextra.php?id=2434

Держатели документа:
ИВМ СО РАН : 660036, Красноярск, Академгородок, 50, стр.44

Доп.точки доступа:
Semenov, V.S.; Семенов В. С.; Biernat, H.K.; Еркаев, Николай Васильевич

    Seismic inhomogeneities in the upper mantle beneath the Siberian craton (Meteorite profile)
/ V.D. Suvorov [et al.] // Russian Geology and Geophysics. - 2013. - Vol. 54, Is. 9. - pp. 1108-1120, DOI 10.1016/j.rgg.2013.07.023 . - ISSN 1068-7971

Кл.слова (ненормированные):
Nuclear explosion -- Seismic profile -- Siberian craton -- Upper mantle

Аннотация: The upper-mantle structure was studied from first-arrival data along the Meteorite profile, run using underground nuclear explosions. Unlike the layered, slightly inhomogeneous models in the previous works, emphasis was laid on lateral inhomogeneity at the minimum possible number of abrupt seismic boundaries. We used forward ray tracing of the traveltimes of refracted and overcritical reflected waves. The model obtained is characterized by considerable velocity variations, from 7.7 km/s in the Baikal Rift Zone to 8.0-8.45 km/s beneath the Tunguska syneclise. A layer of increased velocity (up to 8.5-8.6 km/s), 30-80 km thick, is distinguished at the base of seismic lithosphere. The depth of the layer top varies from 120 km in the northern Siberian craton to 210 km in its southeastern framing. It has been shown that, with crustal density anomalies excluded, the reduced gravity field is consistent with the upper-mantle velocity model. В© 2013.

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Доп.точки доступа:
Suvorov, V.D.; Mel'nik, E.A.; Mishen'kina, Z.R.; Pavlov, E.V.; Kochnev, V.A.; Кочнев, Владимир Алексеевич

    Jump conditions for pressure anisotropy and comparison with the Earth's bow shock
[Text] / D. F. Vogl [et al.] // Nonlinear Process Geophys. - 2001. - Vol. 8: 25th General Assembly of the European-Geophysical-Society (APR, 2000, NICE, FRANCE), Is. 3. - P167-174. - Cited References: 16 . - ISSN 1023-5809
РУБ Geochemistry & Geophysics + Meteorology & Atmospheric Sciences

Аннотация: Taking into account the pressure anisotropy in the solar wind, we study the magnetic field and plasma parameters downstream of a fast shock, as functions of upstream parameters and downstream pressure anisotropy. In our theoretical approach, we model two cases: a) the perpendicular shock and b) the oblique shock. We use two threshold conditions of plasma instabilities as additional equations to bound the range of pressure anisotropy. The criterion of the mirror instability is used for pressure anisotropy P (perpendicular to)/P (parallel to) 1. Analogously, the criterion of the fire-hose instability is taken into account for pressure anisotropy P-perpendicular to/P-parallel to 1. We found that the variations of the parallel pressure, the parallel temperature, and the tangential component of the velocity are most sensitive to the pressure anisotropy downstream of the shock. Finally, we compare our theory with plasma and magnetic field parameters measured by the WIND spacecraft.


Доп.точки доступа:
Vogl, D.F.; Biernat, H.K.; Erkaev, N.V.; Еркаев, Николай Васильевич; Farrugia, C.J.; Muhlbachler, S.

    MHD effects of the solar wind flow around planets
[Text] / H. K. Biernat [et al.] // Nonlinear Process Geophys. - 2000. - Vol. 7: 24th General Assembly of the European-Geophysical-Society (APR 19-23, 1999, THE HAGUE, NETHERLANDS), Is. 03.04.2013. - P201-209. - Cited References: 34 . - ISSN 1023-5809
РУБ Geochemistry & Geophysics + Meteorology & Atmospheric Sciences

Аннотация: The study of the interaction of the solar wind with magnetized and unmagnetized planets forms a central topic of space research. Focussing on planetary magnetosheaths, we review some major developments in this field. Magnetosheath structures depend crucially on the orientation of the interplanetary magnetic field, the solar wind Alfven Mach number, the shape of the obstacle (axisymmetric/non-axisymmetric, etc.), the boundary conditions at the magnetopause (low/high magnetic shear), and the degree of thermal anisotropy of the plasma. We illustrate the cases of Earth, Jupiter and Venus. The terrestrial magnetosphere is axisymmetric and has been probed in situ by many spacecraft. Jupiter's magnetosphere is highly non-axisymmetric. Furthermore, we study magnetohydrodynamic effects in the Venus magnetosheath.


Доп.точки доступа:
Biernat, H.K.; Erkaev, N.V.; Еркаев, Николай Васильевич; Farrugia, C.J.; Vogl, D.F.; Schaffenberger, W.

    Research into harbingers of earthquakes with wavelet analysis of data monitoring
[Text] : статья / A. G. Marchuk, K. V. Simonov, S. A. Peretokin // Bulletin of the Novosibirsk Computing Center. Series: Mathematical modeling in geophysics. - 2008. - Iss. 12. - p. 55-64



Доп.точки доступа:
Simonov, K.V.; Симонов, Константин Васильевич; Peretokin, S.A.

    JOINT ANALYSIS OF SEISMOLOGICAL DATA BY THE USSO AND DSS STATIONS IN THE CAUCASUS REGION
[Text] / N. V. KONDORSKAYA [et al.] // Pure Appl. Geophys. - 1981. - Vol. 119, Is. 6. - P1167-1179, DOI 10.1007/BF00876695. - Cited References: 13 . - ISSN 0033-4553
РУБ Geochemistry & Geophysics

Кл.слова (ненормированные):
Caucasus -- Three-dimensional seismic modelling


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Держатели документа:
ACAD SCI USSR,CTR COMP,KRASNOYARSK,USSR
ACAD SCI GESSR,INST GEOPHYS,TBILISI,GESSR
ALL UNION GEOPHYS RES INST,MOSCOW,USSR
ИВМ СО РАН
Institute of Physics of the Earth, Academy of Sciences of the USSR, Moscow, Russia
Computational Center, Siberian Branch of Academy of Sciences of the USSR, Krasnoyarsk, Russia
Institute of Geophysics, Academy of Sciences of Georgian SSR, Tbilisi, Russia
VNIIGEOFIZIKA, Ministry of Geology of the USSR, Moscow, Russian Federation

Доп.точки доступа:
KONDORSKAYA, N.V.; SLAVINA, L.B.; PIVOVAROVA, N.B.; BALAVADZE, B.K.; ALEXIDZE, M.A.; GOTSADZE, S.D.; MARUSIDZE, G.I.; SIKHARULIDZE, D.I.; PAVLENKOVA, N.I.; KHROMETSKAYA, E.A.; KRASNOPEVTSEVA, G.V.

    INVESTIGATION OF THE EARTHS CRUSTAL STRUCTURE USING EARTHQUAKE AND DEEP SEISMIC-SOUNDING DATA OBTAINED FOR THE CARPATHIANS
[Text] / N. V. KONDORSKAYA [et al.] // Pure Appl. Geophys. - 1981. - Vol. 119, Is. 6. - P1157-1166, DOI 10.1007/BF00876694. - Cited References: 13 . - ISSN 0033-4553
РУБ Geochemistry & Geophysics

Кл.слова (ненормированные):
Carpathians -- Three-dimensional seismic modelling


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Держатели документа:
ACAD SCI USSR,CTR COMP,KRASNOYARSK,USSR
ACAD SCI UKSSR,INST GEOPHYS,KIEV,UKSSR
ALL UNION GEOPHYS RES INST,MOSCOW,USSR
ИВМ СО РАН
Institute of Physics of the Earth, Academy of Sciences of the USSR, Moscow, Russia
Computational Centre, Siberian Branch of Academy of Sciences of the USSR, Krasnoyarsk, Russia
Institute of Geophysics, Academy of Sciences of the Ukr. SSR, Kiev, Russia
VNHGEOFIZIKA, Ministry of Geology of the USSR, Moscow, Russia

Доп.точки доступа:
KONDORSKAYA, N.V.; SLAVINA, L.B.; PIVOVAROVA, N.B.; SOLLOGUB, V.B.; CHEKUNOV, A.V.; SAGALOVA, E.A.; SHCHUKIN, Y.K.

    Estimate of the vertical plankton biomass profile on the basis of measurements of fluorescent characteristics in pelagial of Lake Baikal
/ M. V. Panchenko [et al.] // Proceedings of SPIE - The International Society for Optical Engineering. - 2014. - Vol. 9292: 20th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics (23 June 2014 through 27 June 2014, ) Conference code: 110711. - Ст. 92922Y, DOI 10.1117/12.2075391 . -
Аннотация: We study the effect of physical, chemical and biological processes on gas exchange of CO2 in the air-water system in Lake Baikal. Photosynthesis of aquatic biota is known to play a crucial role in changing the concentration of carbon dioxide in the water. Fluorescent methods are considered to be of high performance in problems of determining quantitative characteristics of biomass, however they require preliminary calibration directly for a specific type of plankton. In the pelagic zone of Lake Baikal the species composition, quantitative and spatial distribution of phytoplankton are characterized by strong spatial and temporal variability. Therefore, the fluorescent devices calibration on a single reference does not provide acceptable accuracy of quantitative assessment of the biomass. The results discussed in the paper were obtained by shipboard measurements during the Baikal campaign of 2010-2011. Correlation between the biomass in 25-meter water layer and the integral value of the fluorescent signal in this layer was obtained for calibration. The report discusses the advantages and disadvantages of the chosen methods and the results of retrieval of the vertical profiles of the biomass for stations in the pelagic zone of Lake Baikal in spring for the 2010-2011 biennium.

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Держатели документа:
Institute of Atmospheric Optics, Siberian Branch, Russian Academy of SciencesTomsk, Russian Federation
Limnological Institute, Siberian Branch, Russian Academy of SciencesIrkutsk, Russian Federation
Institute of Computational Modeling, Siberian Branch, Russian Academy of SciencesKrasnoyarsk, Russian Federation

Доп.точки доступа:
Panchenko, M.V.; Sakirko, M.V.; Usoltseva, M.V.; Popovskaya, G.I.; Domysheva, V.M.; Shimaraev, M.N.; Zavoruev, V.V.; Pestunov, D.A.

    A Study of (m,k)-methods for solving differential-algebraic systems of index 1
/ A. I. Levykin, E. A. Novikov // Communications in Computer and Information Science . - 2015. - Vol. 549: 8th International Conference on Mathematical Modeling of Technological Processes, CITech 2015; Almaty; Kazakhstan; 24 September 2015 through 27 September 2015; Code 159049. - P94-107, DOI 10.1007/978-3-319-25058-8_10 . -
Аннотация: A class (m,k)-methods is discussed for the numerical solution of the initial value problems for implicit systems of ordinary differential equations. The order conditions and convergence of the numerical solution in the case of implementation of the scheme with the time-lagging of matrices derivatives for systems of index 1 are obtained. At k ? 4 the order conditions are studied and schemes optimal computing costs are obtained. © Springer International Publishing Switzerland 2015.

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Держатели документа:
Institute of Computational Mathematics and Mathematical Geophysics, Academy of Sciences, Siberian Branch, pr. Ak. Lavrent’eva 6, Akademgorodok, Novosibirsk, Russian Federation
Institute of Computational Modeling, Academy of Sciences, Siberian Branch, Akademgorodok 50, Str. 4, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Novikov, E. A.; Новиков, Евгений Александрович

    Inter-annual dynamics of changes in hyrdooptical characteristics of ecosystem of the Yenisei basin
/ P. V. Postnikova // Proceedings of SPIE - The International Society for Optical Engineering : SPIE, 2016. - Vol. 10035: 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics (30 June 2016 through 3 July 2016, ) Conference code: 125266, DOI 10.1117/12.2248511 . -
Аннотация: The seasonal variability of hydrooptical and fluorescent characteristics from the coastal waters of the Yenisei river have been studied. The work was estimated chlorophyll content, photosynthetic activity, concentration dissolved organic matter (DOM) and mineral component. The data have been obtained from series of regular observations in the coastal waters of Krasnoyarsk during 2012 - 2014. During year the chlorophyll "a" concentration and mineralization varied 2 times for warm and cold seasons. Regression analysis revealed relationship between coefficient synthetic activity and concentration of chlorophyll "a". © 2016 SPIE.

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Держатели документа:
Institute of Computational Modelling, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Postnikova, P. V.

    Fluorescent and optical properties of sunflower leaves grown under oil pollution
/ E. N. Zavorueva, V. V. Zavoruev, R. T. Emelyanov // Proceedings of SPIE - The International Society for Optical Engineering : SPIE, 2016. - Vol. 10035: 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics (30 June 2016 through 3 July 2016, ) Conference code: 125266, DOI 10.1117/12.2249737 . -
Аннотация: Sunflower plants were grown in the laboratory under continuous light on the ground, the sand and the liquid medium. Fluorescence parameters were measured using PAM fluorimeter (Walz, Germany) and optical spectrophotometric sensor CCM-200 plus, Opti-Sciences, USA). The change of parameters of Fo, Fm, Fv/Fm, ETR and CCI in leaves after addition of oil at a concentration of 6 g/kg is investigated. It is shown that the parameters CCI and ETR (electron transport rates) are most sensitive to oil pollution. The value of the CCI in sunflower leaves increased (compared to control) after the addition of oil in the soil and decreased after the addition of oil in sand and liquid culture medium. © 2016 SPIE.

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Держатели документа:
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation
Institute of Computational Modeling, SB, RAS, Akademgorodok, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zavorueva, E. N.; Zavoruev, V. V.; Emelyanov, R. T.

    The linear dependence of Fm leaves of plants from the ratio of the total chlorophyll concentration to carotenoid concentration
/ V. V. Zavoruev, E. N. Zavorueva // Proceedings of SPIE - The International Society for Optical Engineering : SPIE, 2016. - Vol. 10035: 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics (30 June 2016 through 3 July 2016, ) Conference code: 125266, DOI 10.1117/12.2249657 . -

Кл.слова (ненормированные):
Carotenoids -- Chlorophyll -- Fm -- Plants -- Chlorophyll -- Fermium -- Geophysics -- Pigments -- Carotenoids -- Fluorescence intensities -- Leaves of plants -- Linear dependence -- Literature analysis -- Plant leaves -- Plants -- Total chlorophyll -- Plants (botany)

Аннотация: From presents own experimental data and literature analysis it follows that in cases where the maximum fluorescence intensity (Fm) of plant leaves was determined using the PAM fluorimeter (Walz, Germany), the dependence of Fm on the relation of total chlorophyll concentration to carotenoid concentration (which was determined according to Wintermans I. F., De Mots A, 1965; D. Wettstein, 1957) is characterized by a linear equation. © 2016 SPIE.

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Держатели документа:
Institute of Computational Modeling SB RAS, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zavoruev, V. V.; Zavorueva, E. N.

    Evaluation of seismic hazard using seismic microzonation techniques
/ E. Bodyakin, S. Peretokin, K. Simonov // CEUR Workshop Proceedings : CEUR-WS, 2017. - Vol. 1839: 2016 International Conference Mathematical and Information Technologies, MIT 2016 (28 August 2016 through 5 September 2016, ) Conference code: 127940. - P16-25 . -
Аннотация: It was shown the technique of seismic hazard assessment based on comprehensive use of methods of seismic microzonation. This technique consists of four steps. The first step is to collect geological, seismological, geophysical and topographic information. Each layer according to geological engineering survey and geophysical work are assigned physical and mechanical properties (density, limit shear stress) and the P-And S- wave velocity. Next (step 2) after visualization and examination input data using GIS technologies 3D modelling of the geological environment is performed (it is created a grid each point of which is referred to coordinates of the site). The number and depth of soil are set in each point based on geological drilling data. Then (step 3) at each point seismic intensity are calculated using instrumental methods including the method of acoustic impedance and computer simulation (GRUNT program). At the last stage according to the analysis of the results of theoretical and instrumental methods seismic microzonation map are created using GIS technologies. The procedure of constructing maps uses different methods of selection areas with the same seismic hazard (kriging, spline interpolation).

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Держатели документа:
Institute of Computational Modeling of Siberian Branch of Russian Academy of Sciences, ICM SB RAS, Akademgorodok, Krasnoyarsk, Russian Federation
Krasnoyarsk Branch Office of Institute of Computational Technologies of Siberian Branch of Russian Academy of Sciences, Special Designing and Technological Bureau Nauka, Mira avenue 53, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Bodyakin, E.; Peretokin, S.; Simonov, K.

    The concentration of PM10 in the atmospheric surface layer of Krasnoyarsk in the period of unfavorable meteorological conditions
/ V. V. Zavoruev, E. N. Zavorueva // Proceedings of SPIE - The International Society for Optical Engineering : SPIE, 2017. - Vol. 10466: 23rd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics (3 July 2017 through 7 July 2017, ) Conference code: 134942, DOI 10.1117/12.2288754 . -
Аннотация: The periods of unfavorable meteorological conditions (UMC) do not coincide with the periods of contamination of suspended particles PM10. There are cases when during the regime of the UMS is not happening the pollution of the atmosphere by aerosol particles. At UMC the pollution of suspended particles in different parts of the city differs as the concentration of the aerosol and the duration of the negative impact on people's health. © 2017 SPIE.

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Держатели документа:
Institute of Computational Modeling, SB, RAS, Akademgorodok, Krasnoyarsk, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, Russian Federation

Доп.точки доступа:
Zavoruev, V. V.; Zavorueva, E. N.

    Numerical Simulation of Chemical Kinetics With a Two-Stage Method for Solving Implicit Systems
[Text] : статья / A. E. Novikov, E. A. Novikov, A. I. Levykin // Университетский научный журнал. - 2017. - № 30. - P21-29 . - ISSN 2222-5064
   Перевод заглавия: Численное моделирование химической кинетики двухстадийным методом решения неявных систем
Аннотация: The Cauchy problem for a stiff system of ODEs unresolved with respect to the derivative often arises in chemical kinetics, mechanical engineering, and other important applications. The two-stage L-stable Rosenbrock-type method is derived. An integration algorithm of alternating stepsize is designed based on the method, aimed at solving implicit stiff systems of ODEs. Numerical results confirming the efficiency of the new algorithm are given.
В химической кинетике, машиностроении и в других важных приложениях возникает задача Коши для жесткой системы ОДУ неразрешенных относительно производной. Построен двухстадийный L-устойчивый метод типа Розенброка, предназначенный для решения неявных жестких систем ОДУ. На основе этого метода сформулирован алгоритм интегрирования переменного шага. Приведены результаты расчетов, подтверждающие эффективность нового алгоритма.

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Держатели документа:
Institute of Computational Mathematics and Mathematical Geophysics SB RAS
Institute of computational modeling SB RAS
Siberian Federal University

Доп.точки доступа:
Novikov, A.E.; Новиков Антон Евгеньевич; Novikov, E.A.; Новиков Евгений Александрович; Levykin, A.I.; Левыкин Александр Иванович

    Correction to: Mathematical Simulation of the Ionospheric Electric Field as a Part of the Global Electric Circuit (Surveys in Geophysics, (2018), 10.1007/s10712-018-9499-6)
/ V. V. Denisenko, M. J. Rycroft, R. G. Harrison // Surv. Geophys. - 2018, DOI 10.1007/s10712-018-9505-z . - Article in press. - ISSN 0169-3298
Аннотация: Our colleague A. P. Nickolaenko has pointed out an unfortunate, and obvious, misprint in our paper. The error is in line 5 of page 12 showing values for s0, which corresponds to the value of the surface conductivity in units of S/m. These values should not be negative. © 2018, Springer Nature B.V.

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Держатели документа:
Institute of Computational Modelling, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
CAESAR Consultancy, Cambridge, CB3 9HW, United Kingdom
Centre for Space, Atmospheric and Oceanic Science, Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
Department of Meteorology, University of Reading, Earley Gate, Reading, RG6 6BB, United Kingdom
Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom

Доп.точки доступа:
Denisenko, V. V.; Rycroft, M. J.; Harrison, R. G.

    Mathematical Simulation of the Ionospheric Electric Field as a Part of the Global Electric Circuit
/ V. V. Denisenko, M. J. Rycroft, R. G. Harrison // Surv. Geophys. - 2018, DOI 10.1007/s10712-018-9499-6 . - Article in press. - ISSN 0169-3298
Аннотация: Electric currents flowing in the global electric circuit are closed by ionospheric currents. A model for the distribution of the ionospheric potential which drives these currents is constructed. Only the internal electric fields and currents generated by thunderstorms are studied, and without any magnetospheric current sources or generators. The atmospheric conductivity profiles with altitude are empirically determined, and the topography of the Earth’s surface is taken into account. A two-dimensional approximation of the ionospheric conductor is based on high conductivities along the geomagnetic field; the Pedersen and Hall conductivity distributions are calculated using empirical models. The values of the potential in the E- and F-layers of the ionosphere are not varied along a magnetic field line in such a model and the electric field strength is only slightly varied because the segments of neighboring magnetic field lines are not strictly parallel. It is shown that the longitudinal and latitudinal components of the ionospheric electric field of the global electric circuit under typical conditions for July, under high solar activity, at the considered point in time, 19:00 UT, do not exceed 9?V/m, and in the sunlit ionosphere they are less than 2?V/m. The calculated maximum potential difference in the E- and F-layers is 42V; the maximum of the potential occurs above African thunderstorms that are near the terminator at that time. A weak local maximum also exists above the thunderstorm area in Central America. The minimum potential occurs near midnight above the Himalayas. The potential has identical values at ionospheric conjugate points. The voltage increases to 55V at 23:00 UT and up to 72V at 06:00 UT, when local midnight comes, respectively, for the African and Central American thunderstorm areas. These voltages are about twice as large at solar minimum. With our more realistic ionospheric model, the electric fields are an order of magnitude smaller than those found in the well-known model of Roble and Hays (J Geophys Res 84(A12):7247–7256, 1979). Our simulations quantitatively support the traditional presentation of the ionosphere as an ideal conductor in models of the global electric circuit, so that our model can be used to investigate UT variations of the global electric circuit. © 2018, The Author(s).

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Держатели документа:
Institute of Computational Modelling, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
CAESAR Consultancy, Cambridge, CB3 9HW, United Kingdom
Centre for Space, Atmospheric and Oceanic Science, Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom
Department of Meteorology, University of Reading, Earley Gate, Reading, RG6 6BB, United Kingdom
Department of Electronic and Electrical Engineering, University of Bath, Bath, BA2 7AY, United Kingdom

Доп.точки доступа:
Denisenko, V. V.; Rycroft, M. J.; Harrison, R. G.

    Third Order (m, k)-Method for Solving Stiff Systems of ODEs and DAEs
/ A. I. Levykin, A. E. Novikov, E. A. Novikov // 2018 14th International Scientific-Technical Conference on Actual Problems of Electronic Instrument Engineering, APEIE 2018 - Proceedings : Institute of Electrical and Electronics Engineers Inc., 2018. - 14th International Scientific-Technical Conference on Actual Problems of Electronic Instrument Engineering, APEIE 2018 (2 October 2018 through 6 October 2018, ) Conference code: 143146. - P158-163, DOI 10.1109/APEIE.2018.8545974 . -
Аннотация: The Cauchy problem for stiff systems of ODEs unresolved with respect to derivative arises in electrical engineering, chemical kinetics and other important areas. Authors derived an L-stable (5, 3)-method for solving the first index systems of DAEs. An algorithm of the alternating integration stepsize based on this method is formulated. The algorithm allows freezing the Jacobian matrix of the system to be solved. Numerical results confirming the efficiency of the new algorithm are given. © 2018 IEEE.

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Держатели документа:
Institute of Computational Mathematics and Mathematical Geophysics, SB, RAS, Novosibirsk, Russian Federation
Siberian Federal University, Institute of Mathematics and Fundamental Informatics, Krasnoyarsk, Russian Federation
Institute of Computational Modelling, FRC KSC, SB, RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Levykin, A. I.; Novikov, A. E.; Novikov, E. A.

    ANTARCTIC OZONE HOLE AS A NATURAL GEOPHYSICAL OBJECT
/ A. V. Dergunov [et al.] // E3S Web of Conferences : EDP Sciences, 2019. - Vol. 75: 2018 Regional Problems of Earth Remote Sensing, RPERS 2018 (11 September 2018 through 14 September 2018, ) Conference code: 145707, DOI 10.1051/e3sconf/20197502008 . -

Кл.слова (ненормированные):
Geophysics -- Molecules -- Remote sensing -- Antarctic ozone hole -- Dynamic process -- Ozone anomalies -- Ozone molecule -- Polar latitude -- Satellite data -- Southern Hemisphere -- Total ozone content -- Ozone

Аннотация: Satellite data on total ozone content for 1985-2015 have been used. Methods of evaluating ozone deficit in the polar region and its excess in middle latitudes of the Southern Hemisphere have been developed. In early spring the ozone molecules outflow and the ozone anomaly forms. Ozone inflows the middle latitudes, its total content increases and a ring with elevated TO forms. In October-November the dynamic process reverses, from the ring the ozone molecules transfer to the polar latitudes. The amount of ozone leaving the ring into the polar regions and filling the ozone anomaly is virtually the same. The results produces indicate that the Antarctic ozone hole is a natural geophysical formation. © The Authors, published by EDP Sciences, 2018.

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Держатели документа:
Institute of Computational Modeling SB RAS, Krasnoyarsk, Akademgorodok, 660036, Russian Federation
Institute of Engineering Physics and Radioelectronics of Siberian Federal University, Akademika Kirenskogo Str. 28/12B, Krasnoyarsk, 660074, Russian Federation
Institute of Space and Information Technology of Siberian Federal University, Akademika Kirenskogo Str. 26/1, Krasnoyarsk, 660074, Russian Federation

Доп.точки доступа:
Dergunov, A. V.; Kashkin, V. B.; Rubleva, A. V.; Romanov, A. A.; Odintsov, R. V.