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Formation of Quasi-power Law Weak Langmuir Turbulence Spectrum by ...

By: P. H. Yoon

Description: Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA. Langmuir wave turbulence generated by a beam-plasma interaction has been studied since the early days of plasma physics research. Despite a long history of investigation on this subject, among the outstanding issues is the generation of harmonic Langmuir waves observed in both laboratory and computer-simulated experiments. However, the phenomenon has not b...

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Global Terrestrial Water Storage Connectivity Revealed Using Compl...

By: J. Donges; J. Chen; A. Y. Sun

Description: Bureau of Economic Geology, the Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, Texas, USA. Terrestrial water storage (TWS) exerts a key control in global water, energy, and biogeochemical cycles. Although certain causal relationship exists between precipitation and TWS, the latter quantity also reflects impacts of anthropogenic activities. Thus, quantification of the spatial patterns of TWS will not only ...

Boers, N., Bookhagen, B., Marwan, N., Kurths, J., and Marengo, J.: Complex networks identify spatial patterns of extreme rainfall events of the South American Monsoon System, Geophys. Res. Lett., 40, 4386–4392, 2013.; Chen, J. L., Rodell, M., Wilson, C. R., and Famiglietti, J. S.: Low degree spherical harmonic influences on Gravity Recovery and Climate Experiment (GRACE) water storage estimates, Geophys. Res. Lett., 32, L14405,

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Relativistic Surfatron Process for Landau Resonant Electrons in Ra...

By: A. M. Hamza; A. Osmane

Description: University of New Brunswick, Physics Department, Fredericton, New Brunswick, Canada. Recent theoretical studies of the nonlinear wave-particle interactions for relativistic particles have shown that Landau resonant orbits could be efficiently accelerated along the mean background magnetic field for propagation angles θ in close proximity to a critical propagation Θc associated with a Hopf–Hopf bifurcation condition. In this report, we extend ...

Albert, J. M.: Nonlinear interaction of outer zone electrons with VLF waves, Geophys. Res. Lett., 29, 116-1–116-3, doi:10.1029/2001GL013941, 2002.; Artemyev, A. V., Krasnoselskikh, V. V., Agapitov, O. V., Mourenas, D. and Rolland, G.: Non-diffusive resonant acceleration of electrons in the radiation belts, Phys. Plasmas, 19, 122901, doi:10.1063/1.4769726, 2013.; Bell, T. F....

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Perturbing a Weather Generator Using Change Factors Derived from R...

By: C. G. Kilsby; C. Harpham; P. D. Jones; C. M. Goodess

Description: Climatic Research Unit, School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK. The purpose of this paper is to provide a method for perturbing Weather Generators (WGs) for future decades and to assess its effectiveness. Here the procedure is applied to the WG implemented within the UKCP09 package and assessed using data from a Regional Climate Model (RCM) simulation which provides a significant climate change between a control...

Christensen, J. H., Hewitson, B., Busuioc, A., Chen, A., Gao, X., Held, I., Jones, R., Kolli, R. K., Kwon, W.-T., Laprise, R., Magaña Rueda, V., Mearns, L., Menéndez, C. G., Räisänen, J., Rinke, A., Sarr, A., and Whetton, P.: Regional Climate Projectionsm in: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M., Chen, ...

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What Determines Size Distributions of Heavy Drops in a Synthetic T...

By: U. Feudel; J. C. Zahnow

Description: Theoretical Physics/Complex Systems, ICBM, University of Oldenburg, 26129 Oldenburg, Germany. We present results from an individual particle based model for the collision, coagulation and fragmentation of heavy drops moving in a turbulent flow. Such a model framework can help to bridge the gap between the full hydrodynamic simulation of two phase flows, which can usually only study few particles and mean field based approaches for coagulation and fragmen...

Bäbler, M. U., Morbidelli, M., and Baldyga, J.: Modelling the breakup of solid aggregates in turbulent flows, J. Fluid Mech., 612, 261–289, 2008.; Bec, J.: Fractal clustering of inertial particles in random flows, Phys. Fluids, 15, L81–L84, 2003.; Bec, J.: Multifractal concentrations of inertial particles in smooth random flows, J. Fluid Mech., 528, 255–277, 2005.; Bec, J., Celani, A., Cencini, M., and Musacchio, S.: Clustering and collisions of heavy particles in random...

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Quantification of Tillage, Plant Cover, and Cumulative Rainfall Ef...

By: E. Vidal Vázquez; I. Bertol; J. Paz-ferreiro

Description: Faculty of Sciences, University of Corunna-UDC, Spain. Changes in soil surface microrelief with cumulative rainfall under different tillage systems and crop cover conditions were investigated in southern Brazil. Surface cover was none (fallow) or the crop succession maize followed by oats. Tillage treatments were: 1) conventional tillage on bare soil (BS), 2) conventional tillage (CT), 3) minimum tillage (MT) and 4) no tillage (N...

Allmaras, R. R., Burwell, R. E., Larson, W. E., and Holt, R. F.: Total porosity and random roughness of the interrow zone as influenced by tillage, USDA Conservation Res. Rep., 7, 22 pp., 1966.; Armstrong, A. C.: On the fractal dimensions of some transient soil properties, J. of Soil Sci., 37, 641–652, 1986.; Bertol, I., Schick, J., Batistela, O., Leite, D., Visentin, D., and Cogo, N. P.: Erosividade das chuvas e sua distribuição entre 1989 e 1998 no Municipio de Lages (...

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A Reexamination of Methods for Evaluating the Predictability of th...

By: V. Hubeny; J. L. Anderson

Description: Geophysical Fluid Dynamics Laboratory, P.O.Box 308 Princeton Universtity, Princeton, NJ 08542 USA. Pioneering work by Lorenz (1965, 1968, 1969) developed a number of methods for exploring the limits of predictability of the atmosphere. One method uses an integration of a realistic numerical model as a surrogate for the atmosphere. The evolution of small perturbations to the integration are used to estimate how quickly errors resulting from a given observ...

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Horton Laws for Hydraulic–geometric Variables and Their Scaling Ex...

By: O. J. Mesa; V. K. Gupta

Description: Department of Civil, Environmental and Architectural Engineering and Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA. An analytical theory is developed that obtains Horton laws for six hydraulic–geometric (H–G) variables (stream discharge Q, width W, depth D, velocity U, slope S, and friction n') in self-similar Tokunaga networks in the limit of a large...

Borchert, R. and Slade, N. A.: Bifurcation ratios and the adaptive geometry of trees, Bot. Gaz., 142, 394–401, 1981.; Barenblatt, G. I.: Scaling, self-similarity, and intermediate asymptotics, Cambridge University Press, Cambridge, UK, 1996.; Barenblatt, G. I.: Scaling, vol. 34, Cambridge University Press, Cambridge, UK, 2003.; Berry, M. and Bradley, P.: The application of network analysis to the study of branching patterns of large dendritic fields, Brain Research, 109,...

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Percolating Magmas in Three Dimensions : Volume 14, Issue 6 (27/11...

By: S. Lovejoy; M. Carrier-nunes; H. Gaonac'H; F. Lepine; D. Schertzer

Description: GEOTOP-UQAM/McGill Centre, UQAM, Montreal, Qc., Canada. The classical models of volcanic eruptions assume that they originate as a consequence of critical stresses or critical strain rates being exceeded in the magma followed by catastrophic fragmentation. In a recent paper (Gaonac'h et al., 2003) we proposed an additional mechanism based on the properties of complex networks of overlapping bubbles; that extreme multibubble coalescence could lead to cat...

Aldibirov, M.: A model for viscous magma fragmentation during volcanic blasts, Bull. Volcanol., 56, 459–465, 1994.; Aldibirov, M. and Dingwell, D. B.: Magma fragmentation by rapid decompression, Nature, 380, 146–148, 1996.; Arbabi, S. and Sahimi, M.: Elastic properties of three-dimensional percolation networks with stretching and bond-bending forces, Phys. Rev. B, 38, 7173–7176, 1988.; Arbabi, S. and Sahimi, M.: Mechanics of disordered solids. I. Percolation on elastic n...

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Intermittency in Mhd Turbulence and Coronal Nanoflares Modelling :...

By: G. Nigro; P. Veltri; A. Mangeney; V. Carbone; F. Malara

Description: Dipartimento di Fisica, Università della Calabria, I-87030 Arcavacata di Rende, Italy. High resolution numerical simulations, solar wind data analysis, and measurements at the edges of laboratory plasma devices have allowed for a huge progress in our understanding of MHD turbulence. The high resolution of solar wind measurements has allowed to characterize the intermittency observed at small scales. We are now able to set up a consistent and convincing v...

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Erratum: the Predictability of Large-scale Wind-drive Flows : Volu...

By: J. Lu; P. Malanotte-rizzoli; S. P. Meacham; A. Mahadevan
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Kinetic Simulations of the Coupling Between Current Instabilities ...

By: J. Büchner; T. Wiegelmann

Description: Max-Planck Institut für Aeronomie, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany. We investigate the coupling between current and tearing instability modes of a thin current sheet using the particle code GISMO. We identify pure tearing modes (kx≠ 0), instabilities in the current flow direction (ky≠ 0) and general 3D reconnection modes (kx≠ 0 and ky≠ 0). Our results give evidence that the coupling between ...

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Predictability of a Low-order Interactive Ensemble : Volume 19, Is...

By: B. Kirtman; L. Siqueira

Description: Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, USA. In this paper, numerical and analytical studies were performed to uncover the mechanisms controlling the changes in ensemble spread of a low-order coupled model with multiple atmospheric realizations. An interactive ensemble approach was applied to a coupled dynamical system based on two versions of the Lorenz 63 model designed in order to imitate the behavior of a coup...

Kumar Mittal, A., Dwivedi, S., and Chandra Pandey, A.: Bifurcation analysis of a paradigmatic model of monsoon prediction, Nonlin. Processes Geophys., 12, 707–715, doi:10.5194/npg-12-707-2005, 2005.; Nese, J. M.: Quantifying local predictability in phase space, Physica, 35D, 237–250, 1989.; Palmer, T. N.: Extended-Range Atmospheric Prediction and the Lorenz Model, B. Am. Meteorol. Soc., 74, 49–66, 1993.; Peña, M. and ...

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Reply to T. Schneider's Comment on Spatio-temporal Filling of Miss...

By: M. Ghil; D. Kondrashov

Description: University of California, Los Angeles, CA, USA. No abstract available.

Beckers, J. and Rixen, M.: EOF calculations and data filling from incomplete oceanographic data sets, J. Atmos. Ocean. Technol., 20, 1839–1856, 2003.; Everson, R. M. and Sirovich, L.: The Karhuren-Loève transform for incomplete data, J. Opt. Soc. Am., 12, 1657–1664, 1995.; Ghil, M., Allen, R. M., Dettinger, M. D., Ide, K., Kondrashov, D., et al.: : Advanced spectral methods for climatic time series, Rev. Geophys., 40(1), 3.1–3.41, doi:10.1029/2000RG000092, 2002.; Golub, ...

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Study of Nonlinear Ion- and Electron-acoustic Waves in Multi-compo...

By: R. Bharuthram; S. V. Singh; G. S. Lakhina; F. Verheest; A. P. Kakad

Description: Indian Institute of Geomagnetism, New Panvel (W), Navi Mumbai – 410 218, India. Large amplitude ion-acoustic and electron-acoustic waves in an unmagnetized multi-component plasma system consisting of cold background electrons and ions, a hot electron beam and a hot ion beam are studied using Sagdeev pseudo-potential technique. Three types of solitary waves, namely, slow ion-acoustic, ion-acoustic and electron-acoustic solitons are found provided the Mac...

Ashour-Abdalla, M. and Okuda, H.: Electron acoustic instabilities in the geomagnetic tails, Geophys. Res. Lett., 13, 366–369, 1986.; Backrud-Ivgren, M., Stenberg, G., André, M., Morooka, M., Hobara, Y., Joko, S., Rönnmark, K. Cornilleau-Wehrlin, N., Fazakerley, A., and R`eme, H., Cluster observations and theoretical identification of broadband waves in the auroral region, Ann. Geophy., 23, 3739–3752, 2005.; Bernstein I. B., Greene J. M., and Kruskal M. D.: Exact Nonlinea...

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Aggregation and Sampling in Deterministic Chaos: Implications for ...

By: P. Burlando; R. Eykholt; T. R. Green; H. S. Kim; J. D. Salas

Description: Department of Civil Engineering, Colorado State University, Fort Collins, Colorado, USA. A review of the literature reveals conflicting results regarding the existence and inherent nature of chaos in hydrological processes such as precipitation and streamflow, i.e. whether they are low dimensional chaotic or stochastic. This issue is examined further in this paper, particularly the effect that certain types of transformations, such as aggregation and sa...

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Nonlinear Wave Effects at the Non-reflecting Beach : Volume 19, Is...

By: E. Pelinovsky; I. Didenkulova

Description: Laboratory of Wave Engineering, Institute of Cybernetics at Tallinn University of Technology, Akadeemia tee 21, 12618 Tallinn, Estonia. Nonlinear effects at the bottom profile of convex shape (non-reflecting beach) are studied using asymptotic approach (nonlinear WKB approximation) and direct perturbation theory. In the asymptotic approach the nonlinearity leads to the generation of high-order harmonics in the propagating wave, which result in the wave b...

Bjorkavag, M. and Kalisch, H.: Wave breaking in Boussinesq models for undular bores, Phys. Lett. A, 375, 1570–1578, 2011.; Bowen, A. J., Inman, D. L., and Simmons, V. P.: Wave set-down and wave set-up, J. Geophys. Res., 73, 2569–2577, 1968.; Carrier, G. F. and Greenspan, H. P.: Water waves of finite amplitude on a sloping beach, J. Fluid Mech., 4, 97–109, 1958.; Dean, R. G. and Dalrymple, R. A.: Coastal processes with engineering applications, Cambridge University Press...

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Book Review of Stochastic Physics and Climate Modelling - a Trilli...

By: D. Schertzer
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Nonlinear Dynamics of Turbulent Waves in Fluids and Plasmas : Volu...

By: K. He; A. C.-l. Chian

Description: Inst. of Low Ener. Nucl. Phys., Beijing Normal Univ., Beijing, 100875 China. In a model drift wave system that is interesting both in fluids and plasmas, we find that an embedded moving saddle point plays an important role at the onset of turbulence. Here the saddle point is actually a saddle steady wave, in its moving frame the wave system can be transformed into a set of coupled oscillators whose motion is affected by the saddle steady wave as if it i...

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Seismic Entangled Patterns Analyzed Via Multiresolution Decomposit...

By: G. Corso; L. S. Lucena; R. Montagne; F. E. A. Leite

Description: Departamento de Ciências Ambientais, Universidade Federal Rural do Semi-Árido, 59625-900, Mossoró, RN, Brazil. This article explores a method for distinguishing entangled coherent structures embedded in geophysical images. The original image is decomposed in a series of j-scale-images using multiresolution decomposition. To improve the image processing analysis each j-image is divided in l-spacial regions generating set of (j, l)-regions. At each (j, l)-...

Allaei, S V., Sahimi, M., and Tabar, M. R R.: Propagation of acoustic waves as a probe for distinguishing heterogeneous media with short-range and long-range correlations, J. Stat. Mech.-Theory E, 3, 16–+, \doi10.1088/1742-5468/2008/03/P03016, 2008.; Bernacchia, A., Naveau, P., Vrac, M., and Yiou, P.: Detecting spatial patterns with the cumulant function - Part 2: An application to El Niño, Nonlin. Processes Geophys., 15, 169–177, 2008.; Chakraborty, A. and Okaya, D.: Fr...

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