A Spatial Two-Dimensional Discrete Filter for Limited-Area-Model Evaluation Purposes

Feser, Frauke; von Storch, Hans
June 2005
Monthly Weather Review;Jun2005, Vol. 133 Issue 6, p1774
Academic Journal
A two-dimensional discrete spatial filter was developed. It serves as a means to classify meteorological fields on a limited-area grid according to their spatial dimensions by filtering certain wavenumber ranges. Thereby it performs an isotropic spatial-scale separation of the atmospheric fields. A general algorithm was developed, which allows the construction of a filter that closely approximates a specific isotropic response function. The filter is simple in the construction and easy to apply while giving reasonable results. The method allows for considerable flexibility in choosing this specific response. This way, low-, band-, and high-pass filters are obtained. Examples show an effective scale separation of atmospheric fields on limited-area grids that can be used for process studies, model evaluation, or comparisons.


Related Articles

  • Simple algorithm transforms filter coefficients. Vitaljic, Frank; Travis, Bill // EDN;01/21/99, Vol. 44 Issue 2, p120 

    Shows a simple algorithm that transforms prototype-filter coefficients to the infinite-impulse-response (IRR) digital filter coefficients. Transformation from the analog to the digital domain.

  • An Idealized Comparison of One-Way and Two-Way Grid Nesting. Harris, Lucas M.; Durran, Dale R. // Monthly Weather Review;Jun2010, Vol. 138 Issue 6, p2174 

    Most mesoscale models can be run with either one-way (parasitic) or two-way (interactive) grid nesting. This paper presents results from a linear 1D shallow-water model to determine whether the choice of nesting method can have a significant impact on the solution. Two-way nesting was found to...

  • A strengthened asymptotic freeness result for random matrices with applications to free entropy. Voiculescu, Dan // IMRN: International Mathematics Research Notices;1998, Vol. 1998 Issue 1, p41 

    The article focuses on the use of asymptotic freeness results for independent random matrices and constant diagonal matrices. It explores the Gaussian random matrices through polar decomposition. The article also discusses the regular representation of a discrete group as well as the free...

  • Reply. Gabella, Marco; Perona, Giovanni // Journal of Applied Meteorology;Nov2001, Vol. 40 Issue 11, p2099 

    Presents a respondence to the comments of Jameson and Kostinski to raindrop spatial distribution on the Journal of Applied Meteorology. Difference on the conclusions in JK; Use of the maximum radius of the circle equal to one-third of the blotting paper; Computation on the correlation dimension.

  • COMPUTING MULTIDIMENSIONAL PERSISTENCE. Carlsson, Gunnar; Singh, Gurjeet; Zomorodian, Afra // Journal of Computational Geometry;Jun2010, Vol. 1 Issue 1, p72 

    The theory of multidimensional persistence captures the topology of a multifiltration -- a multiparameter family of increasing spaces. Multifiltrations arise naturally in the topological analysis of scientific data. In this paper, we give a polynomial time algorithm for computing...

  • An Extended Matched Filtering Method to Detect Periodicities in a Rough Grating for Extremely Large Roughness. Vani, V. C.; Chatterjee, S. // Bulletin of the Astronomical Society of India;Sep-Dec2003, Vol. 31 Issue 3/4, p457 

    Matched filtering algorithm has beenshown by us to be an effective method to detect hidden periodicities in a rough grating, extending detectability to regimes of higher roughness than was hitherto known. The above matched filtering is further extended here to even 'rougher' regimes by...

  • Noise Reduction in Color image using Interval Type-2 Fuzzy Filter (IT2FF).  // International Journal of Engineering Science & Technology;2011, Vol. 3 Issue 2, p1334 

    The article reports on the use of Interval Type-2 Fuzzy Filter (IT2FF) for noise reduction in color image. It states the new filtering algorithm IT2FF consists of two sub filters, which computes the distance between the color components of the central pixel and its neighborhood and the local...

  • Asynchronous Variational Integrators. Lew, A.; Marsden, J. E.; Ortiz, M.; West, M. // Archive for Rational Mechanics & Analysis;Apr2003, Vol. 167 Issue 2, p85 

    We describe a new class of asynchronous variational integrators (AVI) for nonlinear elastodynamics. The AVIs are distinguished by the following attributes: (i) The algorithms permit the selection of independent time steps in each element, and the local time steps need not bear an integral...

  • Nonoverlapping Schwarz algorithm for solving two-dimensional m-DDFV schemes. BOYER, FRANCK; HUBERT, FLORENCE; KRELL, STELLA // IMA Journal of Numerical Analysis;Oct2010, Vol. 30 Issue 4, p1062 

    We propose a nonoverlapping Schwarz algorithm for solving ‘discrete duality finite-volume’ (DDFV) schemes on general meshes. In order to handle this problem the first step is to propose and study a convenient DDFV scheme for anisotropic elliptic problems with mixed Dirichlet/Fourier...


Read the Article

Courtesy of

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics