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Finite Amplitudes Helical Waves on the Surface of the Conducting F...

By: O. A. Sinkevich; V. V. Glazkov

Description: Moscow Power Engineering Institute, 111 250, Krasnokazarmennaya str, 14, Moscow, Russia. Helical waves of the finite amplitude on a surface of the fluid conducting Earth core are examined for generation of the magnetic field. Estimates are made for the differentially rotating cylindrical conducting fluid body, with the helical surface wave structure on its top. This structure is similar to the self-exciting Faraday-disk homopolar heterogeneous dynamo. Es...

Aurnou, J., Andreadis, S., Zhu, L., and Olson, P.: Experiments on convection in Earth's core tangent cylinder, Earth Planet. Sci. Lett., 212, 119–134, 2003.; Bullard, E. C.: The Stability of a Homopolar Disc Dynamo, Proc. Camb. Phil. Soc., 51, 744–760, 1955.; Cowling, T. G.: The Magnetic Field of Sunspots, Mon. Not. R. Astr. Soc., 94, 39–48, 1934.; Gailitis, A., Lielausis, O., Platacis, E., Gerbeth, G., and Stefani, F.: The Riga Dynamo Experiment, Surveys in Geophysics, ...

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Fractal Dimension of Lightning Discharge : Volume 2, Issue 2 (30/1...

By: F. Castaño; A. F. Pacheco; J. B. Gómez; J. Sañudo

Description: Departamento de Fisica, Facultad de Ciencias, Universidad de Extremadura,06071 Badajoz, Spain. Using a stochastic model, we simulate the process of dielectric breakdown in the atmosphere and calculate the fractal dimension of 3-dimensional lightning patterns. Finite-size effects have been studied. The projections of our patterns on vertical planes fit the experimental fractal dimension obtained from photographic analysis. This work is inspired by a previous work by A.A. Tsonis.

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On Reliability Analysis of Multi-categorical Forecasts : Volume 15...

By: J. Bröcker

Description: Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 34, 01187 Dresden, Germany. Reliability analysis of probabilistic forecasts, in particular through the rank histogram or Talagrand diagram, is revisited. Two shortcomings are pointed out: Firstly, a uniform rank histogram is but a necessary condition for reliability. Secondly, if the forecast is assumed to be reliable, an indication is needed how far a histogram is expected to deviate f...

Anderson, J L.: A method for producing and evaluating probabilistic forecasts from ensemble model integrations, J. Climate, 9, 1518–1530, 1996.; Breiman, L.: Probability, Addison-Wesley-Publishing, 1973.; Bröcker, J.: Decomposition of Proper Scores, Tech. rep., Max-Planck-Institut für Physik komplexer Systeme, Dresden, arXiv:0806.0813 [physics.ao-ph], 2008.; Bröcker, J. and Smith, L A.: Scoring Probabilistic Forecasts: The Importance of Being Proper, Weather and Forecast...

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A Simple Conceptual Model of Abrupt Glacial Climate Events : Volum...

By: D. R. Chialvo; M. Christl; A. Ganopolski; H. Braun

Description: Heidelberg Academy of Sciences and Humanities, c/o Institute of Environmental Physics, University of Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany. Here we use a very simple conceptual model in an attempt to reduce essential parts of the complex nonlinearity of abrupt glacial climate changes (the so-called Dansgaard-Oeschger events) to a few simple principles, namely (i) the existence of two different climate states, (ii) a threshold proc...

Alley, R B. and Clark, P U.: The deglaciation of the northern hemisphere: A global perspective, Ann. Rev. Earth Planet. Sci., 27, 149–182, 1999.; Alley, R B., Clark, P U., Keigwin, L D., and Webb, R S.: Making sense of millennial-scale climate change, in: Mechanisms of Global Climate Change at Millennial Time Scales, edited by: Clark, P U., Webb, R S., and Keigwin, L D., AGU, Washington, DC, 385–394, 1999.; Alley, R B., Anandakrishnan, S., and Jung, P.: Stochastic resona...

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Self-organization of Ulf Electromagnetic Wave Structures in the Sh...

By: K. Chargazia; G. Zimbardo; O. Kharshiladze; G. Aburjania

Description: I. Vekua Institute of Applied Mathematics, Tbilisi State University, 2 University str., 0143 Tbilisi, Georgia. This work is devoted to investigation of nonlinear dynamics of planetary electromagnetic (EM) ultra-low-frequency wave (ULFW) structures in the rotating dissipative ionosphere in the presence of inhomogeneous zonal wind (shear flow). Planetary EM ULFW appears as a result of interaction of the ionospheric medium with the spatially inhomogen...

Aburjania, G.: Structural turbulences and diffusion of plasmas in the magnetic traps, Plasma Phys. Rep., 16, 70–76, 1990.; Aburjania, G.: Self-organization of acoustic-gravity vortices in the ionosphere before earthquake, Plasma Phys. Rep., 22, 954–959, 1996.; Aburjania, G.: Self-Organization of Nonlinear Vortex Structures and Vortex Turbulence in Dispersive Media, KomKniga, Moscow, 2006 (in Russian).; Aburjania, G.: Formation of strong stationary vortex turbulence in th...

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Multifractal Analysis of Mercury Inclusions in Quartz by X-ray Com...

By: T. Shibata; T. Echigo; T. Maruoka

Description: Geological Survey of Hokkaido, Hokkaido Research Organization, N19 W12, Kita-ku, Sapporo, Hokkaido 060-0819, Japan. In order to refine our understanding how fluid inclusions were trapped in the host minerals, we non-destructively observed mercury inclusions (liquid Hg0) in quartz samples using X-ray computed tomography (CT) technique. The X-ray CT apparatus can observe internal structures of the samples and give cross-sectional images from the...

Abramoff, M. D., Magalhaes, P. J., and Ram, S. J.: Image processing with ImageJ, Biophotonics International, 11, 36–42, 2004.; Bird, N., Díaz, M. C., Saa, A., and Tarquis, A. M.: Fractal and multifractal analysis of pore-scale images of soil, J. Hydrol., 322, 211–219, 2006.; Burke, E. A. J.: Raman microspectrometry of fluid inclusions, Lithos, 55, 139–158, 2001.; Ferreiro, J. P. and Vázquez, E. V.: Multifractal analysis of Hg pore size distributions in soils with contras...

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Plasma Waves Above the Ion Cyclotron Frequency in the Solar Wind: ...

By: C. Briand

Description: LESIA, Observatoire de Paris, CNRS, UPMC, Université Paris Diderot; 5 Place Jules Janssen, 92190 Meudon, France. Since the very beginning of the space venture, discrepancies between hydrodynamic models and observations have raised the attention to the kinetic effects taking place in the interplanetary medium. After discussing some of these constraints, a review on the state of the art knowledge on the waves in the range fcipe...

Bale, S D., Kellogg, P J., Larson, D E., Lin, R P., Goetz, K., and Lepping, R P.: Bipolar electrostatic structures in the shock transition region: Evidence of electron phase space holes, Geophys. Res. Lett., 25, 2929–2932, \doi10.1029/98GL02111, 1998.; Behlke, R., André, M., Bale, S D., Pickett, J S., Cattell, C A., Lucek, E A., and Balogh, A.: Solitary structures associated with short large-amplitude magnetic structures (SLAMS) upstream of the Earth's quasi-parallel bow...

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The Impact of Initial Spread Calibration on the Relo Ensemble and ...

By: C. Rowley; C. N. Barron; P. Spence; P. Hogan; E. Coelho; G. Jacobs; O. M. Smedstad; P. Muscarella; M. Wei; P. Martin

Description: Naval Research Laboratory, Stennis Space Center, MS, USA. A number of real-time ocean model forecasts were carried out successfully at Naval Research Laboratory (NRL) to provide modeling support and numerical guidance to the CARTHE GLAD at-sea experiment during summer 2012. Two RELO ensembles and three single models using NCOM and HYCOM with different resolutions were carried out. A calibrated ensemble system with enhanced spread and reliability was deve...

Andrade-Canto, F., Sheinbaum, J., and Zavala Sansón, L.: A Lagrangian approach to the Loop Current eddy separation, Nonlin. Processes Geophys., 20, 85–96, doi:10.5194/npg-20-85-2013, 2013.; Barron, C. N., Kara, A., Martin, P., Rhodes, R., and Smedstad, L.: Formulation, implementation and examination of vertical coordinate choices in the Global Navy Coastal Ocean Model (NCOM), Ocean Model., 11, 347–375, 2006.; Beron-Ver...

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Scaling Laws of Diffusion and Time Intermittency Generated by Cohe...

By: D. Contini; A. Donateo; R. Cesari; P. Paradisi; P. Allegrini

Description: Istituto di Scienza e Tecnologie dell'Informazione A. Faedo (ISTI-CNR), Via Moruzzi 1, 56124 Pisa, Italy. We investigate the time intermittency of turbulent transport associated with the birth-death of self-organized coherent structures in the atmospheric boundary layer. We apply a threshold analysis on the increments of turbulent fluctuations to extract sequences of rapid acceleration events, which is a marker of the transition between self-organized s...

Bianco, S., Grigolini, P., and Paradisi, P.: Fluorescence intermittency in blinking quantum dots: renewal or slow modulation?, J. Chem. Phys., 123, 174704, doi:10.1063/1.2102903, 2005.; Bianco, S., Grigolini, P., and Paradisi, P.: A fluctuating environment as a source of periodic modulation Chem. Phys. Lett., 438, 336–340, 2007.; Cava, D. and Katul, G. G.: The effects of thermal stratification on clustering properties of ca...

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Insight Into Earthquake Sequencing: Analysis and Interpretation of...

By: K. Vasudevan; M. S. Cavers

Description: Department of Mathematics and Statistics, University of Calgary, Calgary, AB T2N 1N4, Canada. Directed graph representation of a Markov chain model to study global earthquake sequencing leads to a time-series of state-to-state transition probabilities that includes the spatio-temporally linked recurrent events in the record-breaking sense. A state refers to a configuration comprised of zones with either the occurrence or non-occurrence of an earthq...

Allan, D. W.: Statistics of atomic frequency standards, Ptoc. IEEE, 54, 221–230, 1966.; Barnes, J. A. and Allan, D. W.: A statistical model of flicker noise, Ptoc. IEEE, 54, 176–178, 1966.; Bird, P.: An updated digital model of plate boundaries, Geochem. Geophy. Geosy., 4, 1027, doi:10.1029/2001GC000252, 2003.; Bohnenstiehl, D. R., Tolstoy, M., Smith, D. K., Fox, C. G., and Dziak, R. P.: Time-clustering behavior of sprea...

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Electron Acoustic Solitons in the Presence of an Electron Beam and...

By: G. S. Lakhina; S. V. Singh; R. Bharuthram; S. Devanandhan

Description: Indian Institute of Geomagnetism, New Panvel (West), Navi Mumbai, India. Arbitrary amplitude electron acoustic solitons are studied in an unmagnetized plasma having cold electrons and ions, superthermal hot electrons and an electron beam. Using the Sagdeev pseudo potential method, theoretical analysis is carried out by assuming superthermal hot electrons having kappa distribution. The results show that inclusion of an electron beam alters the minimum va...

Armstrong, T. P., Paonessa, M. T., Bell II, E. V., and Krimigis, S.M.: Voyager observations of Saturnian ion and electron phase space densities, J. Geophys. Res., 88, 8893–8904, 1983.; Berthomier, M., Pottelette, R., Malingre, M., and Khotyaintsev, Y.: Electron-acoustic solitons in an electron-beam plasma system, Phys. Plasmas, 7, 2987–2994, 2000.; Berthomier, M., Pottelette, R., Muschietti, L., Roth, I., and Carlson, C. W.: Scaling of 3D solitary waves observed by FAST ...

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Structuring of Turbulence and Its Impact on Basic Features of Ekma...

By: S. Outten; S. Tyuryakov; I. Esau; S. Zilitinkevich; R. Davy

Description: Nansen Environmental and Remote Sensing Center, Thormohlensgt. 47, 5006 Bergen, Norway. The turbulent Ekman boundary layer (EBL) has been studied in a large number of theoretical, laboratory and modeling works since F. Nansen's observations during the Norwegian Polar Expedition 1893–1896. Nevertheless, the proposed analytical models, analysis of the EBL instabilities, and turbulence-resolving numerical simulations are not fully consistent. In particular,...

Zhang, G., Xu, X., and Wang, J.: A dynamic study of Ekman characteristics by using 1998 SCSMEX and TIPEX boundary layer data, Adv. Atmos. Sci., 30, 349–356, 2003.; Andren, A. and Moeng, C.-H.: Single-point closures in a neutrally stratified boundary layer, J. Atmos. Sci., 50, 3366–3379, 1993.; Andren, A., Brown, A. R., Graf, J., Mason, P. J., Moeng, C.-H., Nieuwstadt, F. T. N., and Schumann, U.: Large-eddy simulation of a neutrally stratified layer: A comparison of four ...

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The Transformation of an Interfacial Solitary Wave of Elevation at...

By: T. Talipova; R. Grimshaw; E. Pelinovsky; V. Maderich; B. H. Choi; K. Terletska; I. Brovchenko; D. C. Kim

Description: Department of Marine and River Systems, Institute of Mathematical Machine and System Problems, Kiev, Ukraine. In this paper we study the transformation of an internal solitary wave at a bottom step in the framework of two-layer flow, for the case when the interface lies close to the bottom, and so the solitary waves are elevation waves. The outcome is the formation of solitary waves and dispersive wave trains in both the reflected and transmitted fields....

Bogucki, D. and Redekopp, L.: A mechanism for sediment resuspension by internal solitary waves, Geophys. Res. Lett., 26, 9, 1317–1320, 1999.; Bourgault, D., Blokhina, M. D., Mirshak, R., and Kelley, D. E.: Evolution of a shoaling internal solitary wavetrain, Geophys. Res. Lett., 34, L03601, doi:10.1029/2006GL028462, 2007.; Brovchenko, I., Gorodetska, N., Maderich, V., Nikishov, V., and Terletska, K.: Interaction of internal solitary waves of large amplitude with obstacle...

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Testing the Performance of Three Nonlinear Methods of Time Seriesa...

By: J. Miksovsky; A. Raidl

Description: Dept. of Meteorology, Faculty of Mathematics and Physics, CharlesUniversity, Prague, Czech Republic. We investigated the usability of the method of local linear models (LLM), multilayer perceptron neural network (MLP NN) and radial basis function neural network (RBF NN) for the construction of temporal and spatial transfer functions between different meteorological quantities, and compared the obtained results both mutually and to the results of multiple...

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Statistical Properties of Earthquakes Clustering : Volume 15, Issu...

By: P. Harabaglia; V. Carbone; L. Sorriso-valvo; C. De Rose; I. Guerra; A. Vecchio

Description: Dipartimento di Fisica, Università della Calabria, Rende (CS), Italy. Often in nature the temporal distribution of inhomogeneous stochastic point processes can be modeled as a realization of renewal Poisson processes with a variable rate. Here we investigate one of the classical examples, namely, the temporal distribution of earthquakes. We show that this process strongly departs from a Poisson statistics for both catalogue and sequence data sets. This in...

Antonioli, A., Piccinini, D., Chiaraluce, L., and Cocco, M.: Fluid flow and seismicity pattern: Evidence from the 1997 Umbria-Marche (central Italy) seismic sequence, Geophys. Res. Lett., 32, L10311, \doi10.1029/2004GL022256, 2005.; Bak, P., Christensen, K., Danon, L., and Scanlon, T.: Unified Scaling Law for Earthquakes, Phys. Rev. Lett., 88, 178501, \doi10.1103/PhysRevLett.88.178501, 2002.; Bi, H., Boerner, G., and Chu, Y.: Correlations in the absorption lines of the q...

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Brief Communication: 2-d Numerical Modeling of the Transformation ...

By: X. Shao; Y. Xiao; S. F. Yang; X. M. Xu; W. X. Chen

Description: National Inland Waterway Regulation Engineering Research Center, Chongqing Jiaotong University, Chongqing, 400074, China. This paper investigates the controls on the transformation mechanism among different channel patterns. A 2-D depth-averaged numerical model is applied to produce the evolution of channel patterns with complex interactions among water flow, sediment transport, and bank erosion. Changes of the variables as discharge, sediment supply, a...

Ackers, P. and Charlton, F. G.: The geometry of small meandering streams, Inst. Civ. Eng. Proc., Suppl., xii, 28–317, 1970.; Ashmore, P. E.: Laboratory modeling of gravel braided stream morphology, Earth Surf. Proc., 7, 201–225, 1982.; Ashmore, P. E.: How do gravel-bed rivers braid?, Can. J. Earth Sci., 28, 326–341, 1991.; Beam, R. M. and Warming, R. F.: Factored, a-stable, linear multistep methods: an alternative to the method of lines for multidimensions, ACM Signum Ne...

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Embedding Reconstruction Methodology for Short Time Series – Appli...

By: F. A. Borotto; R. Abarca-del-rio; H. F. Astudillo

Description: Departamento de Física, Universidad de Concepción, Casilla 160-C, Concepción, Chile. We propose an alternative approach for the embedding space reconstruction method for short time series. An m-dimensional embedding space is reconstructed with a set of time delays including the relevant time scales characterizing the dynamical properties of the system. By using a maximal predictability criterion a d-dimensional subspace is selected with its ...

Abarbanel, H. D. I., Brown, R., Sidorowich, J. J., and Tsimring, L. S.: The analysis of observed chaotic data in physical systems, Rev. Mod. Phys., 65, 1331–1392, doi:10.1103/RevModPhys.65.1331, 1993.; Alparslan, A. K., Sayar, M., and Atilgan, A. R.: State-space prediction model for chaotic time series, Phys. Rev. E, 58, 2640–2643, doi:10.1103/PhysRevE.58.2640,...

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Evolution of Atmospheric Connectivity in the 20Th Century : Volume...

By: M. Barreiro; A. C. Martí; F. Arizmendi

Description: Instituto de Física, Facultad de Ciencias, Universidad de la República, Igua 4225, Montevideo, Uruguay. We aim to study the evolution of the upper atmosphere connectivity over the 20th century as well as to distinguish the oceanically forced component from the atmospheric internal variability. For this purpose we build networks from two different reanalysis data sets using both linear and nonlinear statistical similarity measures to determine the existe...

Albert, R. and Barabási, A. L.: Statistical mechanics of complex networks, Rev. Mod. Phys., 74, 47–97, 2002.; Bandt, C. and Pompe, B.: Permutation entropy: A natural complexity measure for time series, Phys. Rev. Lett., 88, 174102, 2002.; Barab\'asi, A. L. and Albert, R.: Emergence of scaling in random networks, Science, 286, 509–512, 1999.; Barreiro, M.: Influence of ENSO and the South Atlantic Ocean on climate predictability over Southeastern South America, Clim. Dynam...

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Scaling and Singularity Characteristics of Solar Wind and Magnetos...

By: Z. Vörös; D. Jankovičová; P. Kovács

Description: Geomagnetic Observatory Hurbanovo, Geophysical Institute SAS, Slovak Republic. Preliminary results are presented which suggest that scaling and singularity characteristics of solar wind and ground-based magnetic fluctuations appear to be a significant component in the solar wind-magnetosphere interaction processes. Of key importance is the intermittence of the "magnetic turbulence" as seen in ground-based and solar wind magnetic data. The...

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Image-model Coupling: Application to an Ionospheric Storm : Volume...

By: C. N. Mitchell; D. Pokhotelov; C. J. Budd; N. D. Smith

Description: Department of Mathematical Sciences, University of Bath, Bath, BA2 7AY, UK. Techniques such as tomographic reconstruction may be used to provide images of electron content in the ionosphere. Models are also available which attempt to describe the dominant physical processes operating in the ionosphere, or the statistical relationships between ionospheric variables. It is sensible to try and couple model output to tomographic images with the aim of infer...

Bhuyan, K. and Bhuyan, P.: International Reference Ionosphere as a potential regularization profile for computerized ionospheric tomography, Adv. Space Res., 39, 851–858, 2007.; Bilitza, D.: International Reference Ionosphere – Status 1995/96, Adv. Space Res., 20, 1751–1754, 1997.; Bust, G. and Mitchell, C.: History, current state, and future directions of ionospheric imaging, Rev. Geophys., 46, RG1003, doi:10.1029/2006RG000212, 2008.; Dow, J., Neilan, R., and Rizos, C.:...

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