World Library  


 
  • Cover Image

Application of a Goy Model to Atmospheric Boundary Layer Data : Vo...

By: C. Yagüe; J. M. Vindel

Description: Área de Modelización, Agencia Estatal de Meteorología (AEMET), Madrid, Spain. This article analyzes the possibility of applying a GOY theoretical model to atmospheric boundary layer data. Bearing this in mind, relative scaling exponents of velocity structure functions are used to compare the model with the data under study. In the model, these exponents are set based on two parameters (q and Δ), which are appropriate to define the model that bett...

Benzi, R., Ciliberto, S., Tripiccione, R., Baudet, C., Massaioli, F., and Succi, S.: Extended self-similarity in turbulent flows, Phys. Rev. E, 48, 29–36, 1993.; Bowman, J. C., Doering, C. R., Eckhardt, B., Davoudi, J., Roberts, M., and Schumacher, J.: Links between dissipation, intermittency and helicity in the GOY model revisited, Physica D, 218, 1–10, 2006.; Constantin, P., Levant, B., and Titi, E. S.: A note on the regularity of inviscid shell models of turbulence, P...

Read More
  • Cover Image

Error Budget in Systems with Time-dependent Forcings : Volume 5, I...

By: P. Sancho

Description: Instituto Nacional de Meteorología, Centro Zonal de Castilla y León, Orión 1, 47071, Valladolid, Spain. The behaviour of the error growth is analyzed in several simple examples of systems with external time-dependent forcings. in some systems oscillations of the error around the saturation level can be observed. A common feature of these examples is the error growth dependence on initial time. In the examples here considered the improvement in the predic...

Read More
  • Cover Image

Escape Rate: a Lagrangian Measure of Particle Deposition from the ...

By: T. Tél; T. Haszpra

Description: Institute for Theoretical Physics and HAS Research Group, Eötvös Loránd University, Pázmány P. s. 1/A, Budapest, 1117, Hungary. Due to rising or descending air and due to gravity, aerosol particles carry out a complicated, chaotic motion and move downwards on average. We simulate the motion of aerosol particles with an atmospheric dispersion model called the Real Particle Lagrangian Trajectory (RePLaT) model, i.e., by solving Newton's equation and by tak...

D'Amours, R. and Malo, A.: A zeroth order Lagrangian Particle Dispersion Model MLDP0, Meteorological Service of Canada, Canadian Meteorological Centre, Environmental Emergency Response Section, internal report, 2004.; Dee, D. P., Uppala, S. M., Simmons, A. J., Berrisford, P., Poli, P., Kobayashi, S., Andrae, U., Balmaseda, M. A., Balsamo, G., Bauer, P., Bechtold, P., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Delsol, C., Dragani, R., Fuentes, M., Geer,...

Read More
  • Cover Image

Improved Singular Spectrum Analysis for Time Series with Missing D...

By: B. Li; F. Peng; Y. Shen

Description: College of Surveying and Geo-informatics, Tongji University, Shanghai, China. Singular spectrum analysis (SSA) is a powerful technique for time series analysis. Based on the property that the original time series can be reproduced from its principal components, this contribution will develop an improved SSA (ISSA) for processing the incomplete time series and the modified SSA (SSAM) of Schoellhamer (2001) is its special case. The approach was evalu...

Broomhead, D. S. and King, G. P.: Extracting qualitative dynamics from experimental data, Physica D, 20, 217–236, 1986.; Buchanan, P. A. and Ruhl, C. A.: Summary of suspended-solids concentration data, San Francisco Bay, California, water year 1998, US Geological Survey Open File Report 2000-88, US Geological Survey, 41 pp., 2000.; Buchanan, P. A. and Schoellhamer, D. H.: Summary of Suspended-Solids Concentration Data, San Francisco Bay, California, Water Year 1997, US G...

Read More
  • Cover Image

A Case for Variational Geomagnetic Data Assimilation: Insights fro...

By: T. Alboussière; C. Eymin; A. Fournier

Description: Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph-Fourier, BP 53, 38041 Grenoble cedex 9, France. Secular variations of the geomagnetic field have been measured with a continuously improving accuracy during the last few hundred years, culminating nowadays with satellite data. It is however well known that the dynamics of the magnetic field is linked to that of the velocity field in the core and any attempt to model secular variatio...

Amit, H. and Olson, P.: Helical core flow from geomagnetic secular variation, Phys. Earth Planet. Inter., 147, 1–25, \doi10.1016/j.pepi.2004.02.006, 2004.; Anderson, E., Bai, Z., Bischof, C., Blackford, S., Demmel, J., Dongarra, J., Du~Croz, J., Greenbaum, A., Hammarling, S., McKenney, A., and Sorensen, D.: LAPACK Users' Guide, Society for Industrial and Applied Mathematics, Philadelphia, PA, third edn., 1999.; Backus, G E.: Kinematics of geomagnetic secular variation in...

Read More
  • Cover Image

Scaling Properties of Velocity and Temperature Spectra Above the S...

By: J. B. Moncrieff; K. G. McNaughton; R. J. Clement

Description: School of GeoSciences, The University of Edinburgh, Edinburgh EH9 3JU, Scotland. We report velocity and temperature spectra measured at nine levels from 1.42 meters up to 25.7 m over a smooth playa in Western Utah. Data are from highly convective conditions when the magnitude of the Obukhov length (our proxy for the depth of the surface friction layer) was less than 2 m. Our results are somewhat similar to the results reported from the Minnesota experim...

Cava, D., Schipa, S. and Giostra, U.: Investigation of low-frequency perturbations induced by a steep obstacle, Bound.-Lay. Meteorol., 115, 27–45, 2005.; Corrsin, S.: On the spectrum of isotropic temperature fluctuations in an isotropic turbulence, J. Appl. Phys., 22, 469–473, 1951.; Deardorff, W J.: Preliminary results from numerical integrations of the unstable boundary layer, J. Atmos. Sci., 27, 1209–1231, 1970.; DeGraaff, D B. and Eaton, J K.: Reynolds-number scaling...

Read More
  • Cover Image

Stochastic Parametric Resonance in Shear Flows : Volume 12, Issue ...

By: M. Scott; F. J. Poulin

Description: University of Waterloo, Waterloo, Ontario, Canada. Time-periodic shear flows can give rise to Parametric Instability (PI), as in the case of the Mathieu equation (Stoker, 1950; Nayfeh and Mook, 1995). This mechanism results from a resonance between the oscillatory basic state and waves that are superimposed on it. Farrell and Ioannou (1996a, b) explain that PI occurs because the snap-shots of the velocity profile are subject to transient growth. If the...

Read More
  • Cover Image

Simulation of the Long-term Behaviour of a Fault with Two Asperiti...

By: S. Santini; M. Dragoni

Description: Dipartimento di Fisica, Università di Bologna, Viale Carlo Berti Pichat 8, 40127 Bologna, Italy. A system made of two sliding blocks coupled by a spring is employed to simulate the long-term behaviour of a fault with two asperities. An analytical solution is given for the motion of the system in the case of blocks having the same friction. An analysis of the phase space shows that orbits can reach a limit cycle only after entering a particular subset of ...

Beltrami, H. and Mareschal, J.-C.: Strange seismic attractor?, Pure Appl. Geophys., 141, 71–81, 1993.; Burridge, R. and Knopoff, L.: Model and theoretical seismology, B. Seismol. Soc. Am., 57, 341–371, 1967.; Byerlee, J.: Friction of rocks, Pure Appl. Geophys., 116, 616–626, 1978.; Cao, T. and Aki, K.: Seismicity simulation with a mass-spring model and a displacement hardening-softening friction law, Pure Appl. Geophys., 122, 10–23, 1984.; Cao, T. and Aki, K.: Seismicity...

Read More
  • Cover Image

Entropy-information Perspective to Radiogenic Heat Distribution in...

By: A. Manglik; R. N. Singh

Description: CSIR-National Geophysical Research Institute, Uppal Road, Hyderabad 500007, India. Depth distribution of radiogenic heat sources in continental crust is an important parameter that controls its thermal structure as well as the mantle heat flow at the base of continental lithosphere. Various models for the depth distribution of radiogenic heat sources have been proposed. Starting from constant and exponential models based on linear heat flow–heat generati...

Albarede, F.: The heat flow/heat generation relationship: An interaction model of fluids with cooling intrusions, Earth Planet. Sci. Lett., 27, 73–78, 1975.; Ashwal, L. D., Morgan, P., Kelly, S. A., and Preicival, G. A.: Heat production in an Archean crustal profile and implications for heat flow and mobilization of heat producing elements, Earth Planet. Sci. Lett., 85, 439–450, 1987.; Bodri, L. and Cermák, V.: Heat production in the continental lithosphere, part II: var...

Read More
  • Cover Image

An Extension of Conditional Nonlinear Optimal Perturbation Approac...

By: Q. Wang; W. Duan; M. Mu; R. Zhang

Description: Key Laboratory of Ocean Circulation and Wave, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China. The approach of conditional nonlinear optimal perturbation (CNOP) was previously proposed to find the optimal initial perturbation (CNOP-I) in a given constraint. In this paper, we extend the CNOP approach to search for the optimal combined mode of initial perturbations and model parameter perturbations. This optimal combined mode, ...

Aanonsen, S. I.: Efficient history matching using a multiscale technique, SPE Reservoir Evaluation and Engineering, 154–164, February 2008.; Birgin, E. G., Martinez, J. M., and Raydan, M.: Nonmonotone spectral projected gradient methods on convex sets, SIAM J. Optimiz., 10, 1196–1211, 2000.; Chu, P. C., Lu, S. H., and Chen, Y. C.: Two kinds of predictability problems in Lorenz system and climate models, Second Hayes Symposium on Seasonal to Interannual Climate Variabilit...

Read More
  • Cover Image

Influence of Stability on the Flux-profile Relationships for Wind ...

By: J. M. Redondo; G. Maqueda; S. Viana; C. Yagüe

Description: Dpto. Geofísica y Meteorología, Universidad Complutense de Madrid, Spain. Data from SABLES98 experimental campaign have been used in order to study the influence of stability (from weak to strong stratification) on the flux-profile relationships for momentum, Φm, and heat, Φh. Measurements from 14 thermocouples and 3 sonic anemometers at three levels (5.8, 13.5 and 32 m) for the period from 10 to 28 September 1998 were...

Arya, S. P. S.: Introduction to Micrometeorology, 2nd edition, International Geophysics Series, Academic Press, London., 2001.; Babiano, A., Dubrulle, B., and Frick, P.: Some properties of two dimensional inverse energy cascade dynamics, Phys. Rev. E., 55, 2693–2706, 1997.; Beljaars, A. C. M. and Holtslag, A. A.: Flux parameterization over land surfaces for atmospheric models, J. Appl. Meteorol., 30, 327–341, 1991.; Basu, S.: Large-eddy simulation of the stably stratifie...

Read More
  • Cover Image

Multifractal Model of Magnetic Susceptibility Distributions in Som...

By: M. E. Gettings

Description: US Geological Survey, Tucson, Arizona, USA. Measurements of in-situ magnetic susceptibility were compiled from mainly Precambrian crystalline basement rocks beneath the Colorado Plateau and ranges in Arizona, Colorado, and New Mexico. The susceptibility meter used measures about 30 cm3 of rock and measures variations in the modal distribution of magnetic minerals that form a minor component volumetrically in these coarsely crystalline graniti...

Aho, A. V., Kernighan, B. W., and Weinberger, P. J.: The AWK programming language, Addison-Wesley Longman Publishing Co., Inc., Boston, MA, USA, 1988.; Altstatt, A., Saltus, R., Bruhn, R., and Haeussler, P.: Magnetic susceptibilities measured on rocks of the upper Cook Inlet, Alaska, US Geological Survey Open-File Report 02-0139, 1, 1–18, 2002.; Baltz, E.: Geologic map and cross sections of the Gallinas Creek area, Sangre De Cristo Mountains, San Miguel County, New Mexic...

Read More
  • Cover Image

Ion Acceleration by Parallel Propagating Nonlinear Alfvén Wave Pac...

By: T. K. Suzuki; T. Hada; T. Umeda; Y. Nariyuki

Description: Faculty of Human Development, University of Toyama, 3190, Toyama City, Toyama 930-8555, Japan. The numerical simulation of the nonlinear evolution of the parallel propagating Alfvén waves in a radially expanding plasma is performed by using a kinetic-fluid model (the Vlasov–MHD model). In our study, both the nonlinear evolution of the Alfvén waves and the radial evolution of the velocity distribution function (VDF) are treated simultaneously. On the othe...

Araneda, J. A., Marsch, E., and Vinas, A. F.: Proton Core Heating and Beam Formation via Parametrically Unstable Alfven-Cyclotron Waves, Phys. Rev. Lett., 100, 125003, doi:10.1103/PhysRevLett.100.125003, 2008.; Bale, S. D., Kasper, J. C., Howes, G. G., Quataert, E., Salem, C., and Sundkvist, D.: Magnetic fluctuation power near proton temperature anisotropy instability thresholds in the solar wind, Phys. Rev. Le...

Read More
  • Cover Image

Wave Interactions in a Shallow-water Model : Volume 5, Issue 3 (30...

By: K. Wiklund

Description: Department of Plasma Physics, Umeå University, S-90187 Umeå, Sweden. By using a Hamiltonian method, non-linear three-wave interaction in a class of systems related to the shallow water model is considered and a general coupling coefficient is presented. In the special case where two inertial waves and one Rossby wave interact resonantly, it is found that even a very small shear of the background velocity can be important in the interaction process. The s...

Read More
  • Cover Image

Multifractal Analysis of Solar Flare Indices and Their Horizontal ...

By: V. Anh; D.-l. Wang; R. Eastes; Z. G. Yu

Description: Hunan Key Laboratory for Computation & Simulation in Science & Engineering, Xiangtan University, Hunan 411105, China. The multifractal properties of the daily solar X-ray brightness, Xl and Xs, during the period from 1 January 1986 to 31 December 2007 which includes two solar cycles are examined using the universal multifractal approach and multifractal detrended fluctuation analysis. Then we convert these time series...

Abramenko, V. I.: Multifractal analysis of solar magnetograms, Solar Phys., 228, 29–42, 2005.; Anh, V. V., Tieng, Q. M., and Tse, Y. K.: Cointegration of stochastic multifractals with application to foreign exchange rates, Int. Trans. Opera. Res., 7, 349–363, 2000.; Anh, V. V., Lau, K. S., and Yu, Z. G.: Multifractal characterisation of complete genomes, J. Phys. A: Math. Gen., 34, 7127–7139, 2001.; Anh, V. V., Lau, K. S., and Yu, Z. G.: Recognition of an organism from f...

Read More
  • Cover Image

Data Assimilation Experiments Using Diffusive Back-and-forth Nudgi...

By: E. Cosme; J. Verron; J. Blum; D. Auroux; G. A. Ruggiero; Y. Ourmières

Description: Université de Nice Sophia-Antipolis/LJAD, Nice, France. The diffusive back-and-forth nudging (DBFN) is an easy-to-implement iterative data assimilation method based on the well-known nudging method. It consists of a sequence of forward and backward model integrations, within a given time window, both of them using a feedback term to the observations. Therefore, in the DBFN, the nudging asymptotic behaviour is translated into an infinite number of iterati...

Anderson, J. L.: A local least squares framework for ensemble filtering, Mon. Weather Rev., 131, 634–642, 2003.; Abarbanel, H. D. I., Kostuk, M., and Whartenby, W.: Data assimilation with regularized nonlinear instabilities, Q. J. Roy. Meteorol. Soc., 136, 769–783, doi:10.1002/qj.600, doi:10.1002/qj.600, 2010.; Anthes, R. A.: Data Assimilation and Initialization of Hurricane Predict...

Read More
  • Cover Image

Two- and Three-dimensional Computation of Solitary Wave Runup on N...

By: D. C. Kim; E. Pelinovsky; I. Didenkulova; B. H. Choi; S.-b. Woo

Description: Dept. of Civil & Environmental Engineering, Sungkyunkwan Univ., Chunchun-dong 300, Jangan-gu, Suwon 440-746, Korea. Solitary wave runup on a non-plane beach is studied analytically and numerically. For the theoretical approach, nonlinear shallow-water theory is applied to obtain the analytical solution for the simplified bottom geometry, such as an inclined channel whose cross-slope shape is parabolic. It generalizes Carrier-Greenspan approach for long w...

Antuono, M. and M. Brocchini, M.: The Boundary Value Problem for the Nonlinear Shallow Water Equations, Stud. Appl. Math., 119, 73–93, 2007.; Brocchini, M., Bernetti, R., Mancinelli, A., and Albertini, G.: An efficient solver for nearshore flows based on the WAF method, Coast. Eng., 43, 105–129, 2001.; Carrier, G. F. and Greenspan, H. P.: Water waves of finite amplitude on a sloping beach, J. Fluid Mech., 4, 97–109, 1958.; Carrier, G. F., Wu, T. T., and Yeh, H.: Tsunami ...

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

An Extended Singular Spectrum Transformation (Sst) for the Investi...

By: N. Itoh; N. Marwan

Description: University of Potsdam Interdisciplinary Center for Dynamics of Complex Systems (DYCOS), Campus Golm, Building 14 Karl-Liebknecht-Str. 24, 14476, Potsdam, Germany. In this paper a change-point detection method is proposed by extending the singular spectrum transformation (SST) developed as one of the capabilities of singular spectrum analysis (SSA). The method uncovers change points related with trends and periodicities. The potential of the proposed meth...

Ashok, K., Guan, Z., and Yamagata, T.: Impact of the Indian Ocean Dipole on the relationship between the Indian Monsoon rainfall and ENSO, Geophys. Res. Lett, 26, 4499–4502, 2001.; Basseville, M. and Nikiforov, I.: Detection of abrupt changes, theory and application, Englewood Cliffs NJ, Prentice-Hall, 1993.; Behera, S. K., Luo, J. J., Masson, S., Delecluse, P., Gualdi, S., Navarra, A., and Yamagata, T.: Paramount impact of the Indian Ocean Dipole on the East African sho...

Read More
  • Cover Image

Shallow Water Cnoidal Wave Interactions : Volume 1, Issue 4 (30/11...

By: A. R. Osborne

Description: Istituto di Fisica Generale dell'Università, Via Pietro Giuria 1, Torino 10125, Italy. The nonlinear dynamics of cnoidal waves, within the context of the general N-cnoidal wave solutions of the periodic Korteweg-de Vries (KdV) and Kadomtsev-Petvishvilli (KP) equations, are considered. These equations are important for describing the propagation of small-but-finite amplitude waves in shallow water; the solutions to KdV are unidirectional while those of KP...

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.