World Library  


 
  • Cover Image

Cyclostrophic Vortices in Polar Regions of Rotating Planets : Volu...

By: V. Pavlov; V. Goncharov

Description: Institute of Atmospheric Physics, Russian Academy of Sciences, 109017 Moscow, Russia. Multi-petal, rotating vortices can form in two-dimensional flows consisting of an inviscid incompressible fluid under certain conditions. Such vortices are principally nonlinear thermo-hydrodynamical structures. The proper rotation of these structures which leads to time-dependent variations of the associated temperature field can be enregistred by a sta...

Read More
  • Cover Image

Assessing Soil Surface Roughness Decay During Simulated Rainfall b...

By: R. García Moreno; A. M. Tarquis; J. G. V. Miranda; E. Vidal Vázquez; A. Saá Requejo; J. Paz Ferreiro; M. C. Díaz

Description: Facultad de Ciencias, Universidade da Coruña, Spain. Understanding and describing the spatial characteristics of soil surface microrelief are required for modelling overland flow and erosion. We employed the multifractal approach to characterize topographical point elevation data sets acquired by high resolution laser scanning for assessing the effect of simulated rainfall on microrelief decay. Three soil surfaces with different initial states or compos...

Abrahams, A. D. and Parsons, A. J.: Determining the mean depth of overland flow in field studies of flow hydraulics, Water Resour. Res., 26, 501–503, 1990.; Abrahams, A. D. and Parsons, A. J.: Resistance to overland flow on desert pavement and its implications for sediment transport modeling, Water Resour. Res., 27, 1827–1836, 1991.; Allmaras, R. R., Burwell, R. E., Larson, W. E., and Holt, R. F.: Total porosity and random roughness of the inter row zone as influenced by...

Read More
  • Cover Image

Reconnection Current Sheet Structure in a Turbulent Medium : Volum...

By: S. Murray; S. Pillsworth; G. Kowal; E. T. Vishniac; G. Eyink; A. Lazarian

Description: Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon SK S7N 5E2, Canada. In the presence of turbulence, magnetic field lines lose their dynamical identity and particles entrained on field lines diffuse through space at a rate determined by the amplitude of the turbulence. In previous work (Lazarian and Vishniac, 1999; Kowal et al., 2009; Eyink et al., 2011) we showed that this leads to reconnection speeds which are independ...

Armstrong, J. W., Rickett, B. J., and Spangler, S. R.: Electron density power spectrum in the local interstellar medium, \apj, 443, 209–221, 1995.; Bale, S. D., Kellogg, P. J., Mozer, F. S., Horbury, T. S., and Reme, H.: Measurement of the Electric Fluctuation Spectrum of Magnetohydrodynamic Turbulence, \prl, 94, 215002, doi:10.1103/PhysRevLett.94.215002, 2005.; Burkhart, B., Lazarian, A., and Gaensler, B. M.: P...

Read More
  • Cover Image

Distribution of Petrophysical Properties for Sandy-clayey Reservoi...

By: G. Ronquillo-jarillo; R. D. Arizabalo; F. Castrejón-vácio; E. Coconi-morales; D. Rivera-recillas; M. Lozada-zumaeta

Description: Instituto Mexicano del Petróleo, Dirección de Investigación y Posgrado, Eje Central Lázaro Cárdenas Norte 152, CP07730, México, D. F., México. The sandy-clayey hydrocarbon reservoirs of the Upper Paleocene and Lower Eocene located to the north of Veracruz State, Mexico, present highly complex geological and petrophysical characteristics. These reservoirs, which consist of sandstone and shale bodies within a depth interval ranging from 500 to 2000 m, were...

Abbaszadeh, M., Takano, O., Yamamoto, H., Shimamoto, T., Yazawa, N., Murguia, S. F., Zamora Guerrero, D. H., and Rodríguez de la Garza, F.: Integrated Geostatistical Reservoir Characterization of Turbidite Sandstone Deposits in Chicontepec Basin, Gulf of Mexico, SPE Annual Technical Conference and Exhibition, 5–8 October 2003, Denver, Colorado, SPE, Paper Number 84052-MS, 2003.; Ambrose, W., Tyler, N., and Parsley, M.: Facies heterogeneity, pay continuity, and infill pot...

Read More
  • Cover Image

Scaling and Multifractal Fields in the Solid Earth and Topography ...

By: D. Schertzer; S. Lovejoy

Description: Physics, McGill University, 3600 University st., Montreal, Que. H3A 2T8, Canada. Starting about thirty years ago, new ideas in nonlinear dynamics, particularly fractals and scaling, provoked an explosive growth of research both in modeling and in experimentally characterizing geosystems over wide ranges of scale. In this review we focus on scaling advances in solid earth geophysics including the topography. To reduce the review to manageable proportions...

Agterberg, F.: Geomathematics, 596 pp., Elsevier, 1974.; Agterberg, F.: New Applications of the Model of de Wisj in regional geochemistry, Math. Geol., 39, 1–25, doi:10.1007/s11004-006-96063-7, 2007.; Ahrens, L. H.: A fundamental law of geochemistry, Nature, 172, 1148–1152, 1953.; Aitchison, J. and Brown, J. A. C.: The lognormal distribution, with special reference to its uses in economics, 176 pp., Cambridge University Press, 1957.; Aviles, C. A., Scholz, C. H., and Boa...

Read More
  • Cover Image

Estimating the Diffusive Heat Flux Across a Stable Interface Force...

By: C. Staquet; J.-p. Chollet; C. Chemel

Description: NCAS-Weather, Centre for Atmospheric & Instrumentation Research, University of Hertfordshire, Hatfield, UK. Entrainment at the top of the convectively-driven boundary layer (CBL) is revisited using data from a high-resolution large-eddy simulation (LES). In the range of values of the bulk Richardson number RiB studied here (about 15–25), the entrainment process is mainly driven by the scouring of the interfacial layer (IL) by convective...

Taylor, G. I.: Diffusion by continuous movements, Proc. London Math. Soc., 20, 196–212, 1921.; Taylor, G. I.: The spectrum of turbulence, P. Roy. Soc. Lond. A Mat., 164, 476–490, 1938.; Betts, A. K.: Reply to comment on the paper {N}on-precipitating cumulus convection and its parameterization, Q. J. Roy. Meteor. Soc., 100, 469–471, 1974.; Bretherton, C. S., MacVean, M. K., Bechtold, P., Chlond, A., Cotton, W. R., Cuxart, J., Cuijpers, H., Khairoutdinov, M., Kosovic, B., ...

Read More
  • Cover Image

Characterizing the Evolution of Climate Networks : Volume 21, Issu...

By: J. Kurths; K. Rehfeld; N. Molkenthin; V. Stolbova; N. Marwan; L. Tupikina

Description: PIK Potsdam Institute of Climate Impact Research, P.O. Box 601203, 14412 Potsdam, Germany. Complex network theory has been successfully applied to understand the structural and functional topology of many dynamical systems from nature, society and technology. Many properties of these systems change over time, and, consequently, networks reconstructed from them will, too. However, although static and temporally changing networks have been studied extensi...

Albert, R. and Barabasi, A.: Topology of evolving networks: local events and universality, Phys. Rev. Lett., 85, 5234–5237, 2000.; Barreiro, M., Marti, A., and Masoller, C.: Inferring long memory processes in the climate network via ordinal pattern analysis, Chaos, 21, 013101, doi:10.1063/1.3545273, 2011.; Barthélemy, M.: Spatial networks, Phys. Rep., 499, 1–100, doi:1...

Read More
  • Cover Image

Direct and Inverse Cascades in the Geodynamo : Volume 15, Issue 6 ...

By: P. Hejda; M. Reshetnyak

Description: Institute of the Physics of the Earth, Russian Acad. Sci, 123995 Moscow, Russia. The rapid rotation of planets causes cyclonic thermal turbulence in their cores which may generate the large-scale magnetic fields observed outside the planets. We investigate numerically a model based on the geodynamo equations in simplified geometry, which enables us to reproduce the main features of small-scale geostrophic flows in physical and wave vector spaces. ...

Alexakis, A., Mininni, P. D., and Pouquet, A.: Turbulent cascades, transefer, and scale interactions in magentohydrodynamics, New J. Phys., 9, 1–20, 2007.; Batchelor, G. K.: The theory of homogeneous turbulence, Cambridge University Press, Cambridge, 1953.; Buffett, B.: A comparison of subgrid-scale models for large-eddy simulations of convection in the Earth's core, Geophys. J. Int., 153, 753–765, 2003.; Busse, F. H.: Thermal instabilities in rapidly rotating systems, J...

Read More
  • Cover Image

Observations of Linear and Nonlinear Processes in the Foreshock Wa...

By: M. Fränz; K.-h. Glassmeier; Y. Nariyuki; Y. Narita; T. Hada

Description: Institute of Geophysics and Extraterrestrial Physics, Technical University of Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany. Waves in the foreshock region are studied on the basis of a hypothesis that the linear process first excites the waves and further wave-wave nonlinearities distribute scatter the energy of the primary waves into a number of daughter waves. To examine this wave evolution scenario, the dispersion relations, the wav...

Spangler, S. R., Leckband, J. A., and Cairns, I. H.: Observations of the parametric decay instability of nonlinear magnetohydrodynamic waves, Phys. Plasmas, 4, 846–855, 1997.; Terasawa, T., Hoshino, M., Sakai, J.-I., and Hada, T.: Decay instability of finite-amplitude circularly polarized Alfvén waves: A numerical simulation of stimulated brillouin scattering, J. Geophys. Res., 91, 4171–4187, 1986.; Araneda, J.: Parametric instabilities of parallel propagating Alfvén wav...

Read More
  • Cover Image

Effective Coastal Boundary Conditions for Tsunami Wave Run-up Over...

By: E. Van Groesen; O. Bokhove; W. Kristina

Description: Department of Applied Mathematics, University of Twente, Enschede, the Netherlands. An effective boundary condition (EBC) is introduced as a novel technique to predict tsunami wave run-up along the coast and offshore wave reflections. Numerical modeling of tsunami propagation at the coastal zone has been a daunting task since high accuracy is needed to capture aspects of wave propagation in the more shallow areas. For example, there are complicated inte...

Antuono, M. and Brocchini, M.: The boundary value problem for the nonlinear shallow water equations, Stud. Appl. Math., 119, 73–93, 2007.; Antuono, M. and Brocchini, M.: Solving the nonlinear shallow-water equations in physical space, J. Fluid Mech., 643, 207–232, 2010.; Audusse, E., Bouchut, F., Bristeau, M. O., Klein, R., and Perthame, B.: A fast and stable well-balaced scheme with hydrostatic reconstruction for shallow water flows, SIAM J. Sci. Comput., 25, 2050–2065,...

Read More
  • Cover Image

Characterisation of Long-term Climate Change by Dimension Estimate...

By: R. Donner; A. Witt

Description: Nonlinear Dynamics Group, Department of Physics, University of Potsdam, Am Neuen Palais 10, 14469 Potsdam, Germany. The problem of extracting climatically relevant information from multivariate geological records is tackled by characterising the eigenvalues of the temporarily varying correlation matrix. From these eigenvalues, a quantitative measure, the linear variance decay (LVD) dimension density, is derived. The LVD dimension density is shown to serv...

Abarbanel, H. D. I.: Analysis of Observed Chaotic Data, Springer, New York, 1996.; Aitchinson, J.: The Statistical Analysis of Compositional Data, Chapman and Hall, London, 1986.; Barrett, P. and Anderson, J. B.: Grain-size analysis of samples from CRP-2/2A, Victoria Land Basin, Antarctica, Terra Antartica, 7(3), 373–378, 2000.; Barrett, P. and Anderson, J. B.: Frequency percent in each size class for grain size analysis of sediment core CRP-2/2A (Table~1), PANGAEA datab...

Read More
  • Cover Image

Intensity of Convective Motions in Marine Atmospheric Boundary Lay...

By: M. I. Mityagina

Description: Space Research Institute of Russian Academy of Sciences, Moscow, Russia. The paper focuses on the occurrence and development of coherent structures observed in the atmosphere above ocean under natural conditions. Microwave imaging radars are suggested as data take instruments. The phenomena of marine atmospheric cells and rolls onset, horizontal planform, aspect ratio and scaling phenomena are examined. Convective patterns manifested in radar images and...

Alpers, W. and Bruemmer, B.: Atmospheric boundary layer rolls observed by the synthetic aperture radar aboard the ERS-1 satellite, J Geophys. Res., 99, 12 613–12 621, 1994.; Bulatov, M. G., Kravtsov, Yu. A., Lavrova, O. Yu., Litovchenko, K. Ts., Mityagina, M. I., Raev, M. D., Sabinin, K. D., Trokhimovskii, Yu. G., Churyumov, A. N., and Shugan, I. V.: Physical mechanisms of aerospace radar imaging of the ocean, Physics-Uspekhi, 46(1), 63–79, 2003.; Churyumov, A. N., Kravt...

Read More
  • Cover Image

Stress States and Moment Rates of a Two-asperity Fault in the Pres...

By: E. Lorenzano; M. Dragoni

Description: Dipartimento di Fisica e Astronomia, Alma Mater Studiorum Università di Bologna, Viale Carlo Berti Pichat 8, 40127 Bologna, Italy. A fault containing two asperities with different strengths is considered. The fault is embedded in a shear zone subject to a constant strain rate by the motions of adjacent tectonic plates. The fault is modelled as a discrete dynamical system where the average values of stress, friction and slip on each asperity are considere...

Amendola, A. and Dragoni, M.: Dynamics of a two-fault system with viscoelastic coupling, Nonlin. Processes Geophys., 20, 1–10, doi:10.5194/npg-20-1-2013, 2013.; Bürgmann, R. and Dresen, G.: Rheology of the lower crust and upper mantle: evidence from rock mechanics, geodesy, and field observation, Ann. Rev. Earth Planet. Sci., 36, 531–567, 2008.; Carter, N. L.: Steady state flow of rocks, Rev. Geophys. Space Phys., 14, 3...

Read More
  • Cover Image

On a Nonlinear State of the Electromagnetic Ion/Ion Cyclotron Inst...

By: M. Scholer; M. Cremer

Description: Max-Planck Institut für Extraterrestrische Physik, 85741 Garching, Germany. We have investigated the nonlinear properties of the electromagnetic ion/ion cyclotron instability (EMIIC) by means of hybrid simulations (macroparticle ions, massless electron fluid). The instability is driven by the relative (super-Alfvénic) streaming of two field-aligned ion beams in a low beta plasma (ion thermal pressure to magnetic field pressure) and may be of importance ...

Read More
  • Cover Image

Multiple-scale Error Growth in a Convection-resolving Model : Volu...

By: F. Uboldi; A. Trevisan

Description: Independent researcher, Milan, Italy. The properties of the multiple-scale instabilities present in a non-hydrostatic forecast model are investigated. The model simulates intense convection episodes occurring in northern Italy. A breeding technique is used to construct ensembles of perturbations of the model trajectories aimed at representing the instabilities that are responsible for error growth on various timescales and space scales. By means of perf...

Baldauf, M., Seifert, A., Förstner, J., Majewski, D., Raschendorfer, M., and Reinhardt, T.: Operational convective-scale numerical weather prediction with the COSMO model: description and sensitivities, Mon. Weather Rev., 139, 3887–3905, doi:10.1175/MWR-D-10-05013.1, 2011.; Benettin, G., Galgani, L., Giorgilli, A., and Strelcyn, J.-M.: Lyapunov characteristic exponents for smooth dynamical systems and for Hamiltonian...

Read More
  • Cover Image

Long's Equation in Terrain Following Coordinates : Volume 16, Issu...

By: M. Humi

Description: Department of Mathematical Sciences, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609, USA. Long's equation describes two dimensional stratified atmospheric flow over terrain which is represented by the geometry of the domain. The solutions of this equation over simple topography were investigated analytically and numerically by many authors. In this paper we derive a new terrain following formulation of this equation which incorp...

Baines, P. G.: Topographic effects in Stratified flows, Cambridge Univ.\ Press, New-York, 1995.; Nappo, C. J.: Atmospheric Gravity Waves, Academic Press, Boston, 2002.; Davis, K. S.: Flow of Nonuniformly Stratified Fluid of Large Depth over Topography, M.Sc. thesis in Mechanical Engineering, MIT, Cambridge, MA, 1999.; Dewan, E. M., Picard, R. H., O'Neil, R. R., Gardiner, H. A., Gibson, J., Mill, J. D., Richards, E., Kendra, M., and Gallery, W. O.: MSX satellite observati...

Read More
  • Cover Image

Combining Inflation-free and Iterative Ensemble Kalman Filters fo...

By: M. Bocquet; P. Sakov

Description: Université Paris-Est, CEREA joint laboratory École des Ponts ParisTech and EDF R&D, France. The finite-size ensemble Kalman filter (EnKF-N) is an ensemble Kalman filter (EnKF) which, in perfect model condition, does not require inflation because it partially accounts for the ensemble sampling errors. For the Lorenz '63 and '95 toy-models, it was so far shown to perform as well or better than the EnKF with an optimally tuned inflation. The iterative ens...

Anderson, J. L. and Anderson, S. L.: A {M}onte {C}arlo Implementation of the Nonlinear Filtering Problem to Produce Ensemble Assimilations and Forecasts, Mon. Weather Rev., 127, 2741–2758, 1999.; Bocquet, M.: Ensemble Kalman filtering without the intrinsic need for inflation, Nonlin. Processes Geophys., 18, 735–750, doi:10.5194/npg-18-735-2011, 2011.; Borwein, J. M. and Lewis, A. S.: Convex analysis and nonlinear opti...

Read More
  • Cover Image

Deterministic Chaos at the Ocean Surface: Applications and Interpr...

By: R. A. Kropfli; C. W. Fairall; A. J. Palmer

Description: NOAA Environmental Technology Laboratory, 325 Broadway, Boulder, CO 80303. Ocean surface, grazing-angle radar backscatter data from two separate experiments, one of which provided coincident time series of measured surface winds, were found to exhibit signatures of deterministic chaos. Evidence is presented that the lowest dimensional underlying dynamical system responsible for the radar backscatter chaos is that which governs the surface wind turbulence...

Read More
  • Cover Image

Non-stationary Temporal Characterization of the Temperature Profil...

By: L. E. Parent; A. Pratte; M. A. Bolinder; F. Anctil

Description: Department of Civil Engineering, Université Laval, Québec, Canada. The objective of this work was to compare time and frequency fluctuations of air and soil temperatures (2-, 5-, 10-, 20- and 50-cm below the soil surface) using the continuous wavelet transform, with a particular emphasis on the daily cycle. The analysis of wavelet power spectra and cross power spectra provided detailed non-stationary accounts with respect to frequencies (or periods) and...

Anctil, F. and Coulibaly, P.: Wavelet analysis of the interannual variability in southern Québec streamflow, J. Climate, 17, 163–173, 2004.; Andrén, O. and Kätterer, T.: ICBM: The Introductory Carbon Balance Model for exploration of soil carbon balances, Ecol. Appl., 7, 1226–1236, 1997.; Bartlett, M. G., Chapman, D. S., and Harris, R. N.: A decade of ground-air temperature tracking at Emigrant Pass observatory, Utah, J. Climate, 19, 3722–3731, 2006.; Beltrami, H. and Mar...

Read More
  • Cover Image

A Simple Model for the Earthquake Cycle Combining Self-organized C...

By: D. L. Turcotte; W. I. Newman

Description: Departments of Earth and Space Sciences, Physics and Astronomy, and Mathematics, University of California, Los Angeles, CA 90095, USA. We have studied a hybrid model combining the forest-fire model with the site-percolation model in order to better understand the earthquake cycle. We consider a square array of sites. At each time step, a "tree" is dropped on a randomly chosen site and is planted if the site is unoccupied. When a clust...

Read More
 
1
|
2
|
3
Records: 1 - 20 of 45 - Pages: 



Copyright © World Library Foundation. All rights reserved. eBooks from Hawaii eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.