Multiprocessing In Meteorological Models
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Multiprocessing In Meteorological Models
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Author : Geerd-R. Hoffmann
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Multiprocessing In Meteorological Models written by Geerd-R. Hoffmann and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Numerical weather prediction on the one hand needs a very large number of floating point calculations, but on the other hand is very time-critical. Therefore, the largest computers available, i.e., the "supercomputers", have usually been acquired by the national meteorological services long before they were used in other fields of research or business. Since the available technology limits the speed of any single computer, parallel computations have become necessary to achieve further improvements in the number of results produced per time unit. This book collects the papers presented at two workshops held at ECMWF on the topic of parallel processing in meteorological models. It provides an insight into the state-of-the-art in using parallel processors operationally and allows extrapolation to other time-critical applications. It also shows trends in migrating to massive parallel systems in the near future.
On The Use Of Multiprocessing Computers For Global Numerical Weather Prediction
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Author : Ross N. Hoffman
language : en
Publisher:
Release Date : 1989
On The Use Of Multiprocessing Computers For Global Numerical Weather Prediction written by Ross N. Hoffman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
A preliminary exploration is made of the uses of multiprocessing computers for large scale NWP using spectral models. In general if global communication between processors is relatively fast and easy, then implementing spectral models is feasible. The global spectral model is recast in terms of latitude and wavenumber tasks. This approach has a number of advantages: The entire algorithm is macrotasked. Only a handful of crucial pointers need to be locked. The spectral transform calculations are localized so that arithmetic always follows the same ordering and all results are exactly reproducible. The latitude wavenumber tasking scheme is implemented and tested on the Sequent Balance, a shared memory multiple instruction multiple data device. It is argued that this scheme could be easily extended and applied to larger machines of this class and provide a good starting point for distributed memory machines. The potential of single instruction multiple data machines is huge. A proposed algorithm for this class of machine uses a processor for each horizontal grid point. Keywords: Numerical weather prediction; Multiprocessors; Atmosphere models; Weather forecasting. (edc).
The Dawn Of Massively Parallel Processing In Meteorology
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Author : Geerd-R. Hoffmann
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Dawn Of Massively Parallel Processing In Meteorology written by Geerd-R. Hoffmann and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The Dawn of Massively Parallel Processing in Meteorology presents collected papers of the third workshop on this topic held at the European Centre of Medium-Range Weather Forecasts (ECMWF). It provides an insight into the state of the art in using parallel processors operationally, and allows extrapolation to other time-critical applications. It also documents the advent of massively parallel systems to cope with these applications.
Mesoscale Meteorological Modeling
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Author : Roger A Pielke Sr
language : en
Publisher: Academic Press
Release Date : 2013-10-08
Mesoscale Meteorological Modeling written by Roger A Pielke Sr and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-08 with Science categories.
The 3rd edition of Mesoscale Meteorological Modeling is a fully revised resource for researchers and practitioners in the growing field of meteorological modeling at the mesoscale. Pielke has enhanced the new edition by quantifying model capability (uncertainty) by a detailed evaluation of the assumptions of parameterization and error propagation. Mesoscale models are applied in a wide variety of studies, including weather prediction, regional and local climate assessments, and air pollution investigations. Broad expansion of the concepts of parameterization and parameterization methodology Addition of new modeling approaches, including modeling summaries and summaries of data sets All-new section on dynamic downscaling
Parallelism In Matrix Computations
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Author : Efstratios Gallopoulos
language : en
Publisher: Springer
Release Date : 2015-07-25
Parallelism In Matrix Computations written by Efstratios Gallopoulos and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-07-25 with Technology & Engineering categories.
This book is primarily intended as a research monograph that could also be used in graduate courses for the design of parallel algorithms in matrix computations. It assumes general but not extensive knowledge of numerical linear algebra, parallel architectures, and parallel programming paradigms. The book consists of four parts: (I) Basics; (II) Dense and Special Matrix Computations; (III) Sparse Matrix Computations; and (IV) Matrix functions and characteristics. Part I deals with parallel programming paradigms and fundamental kernels, including reordering schemes for sparse matrices. Part II is devoted to dense matrix computations such as parallel algorithms for solving linear systems, linear least squares, the symmetric algebraic eigenvalue problem, and the singular-value decomposition. It also deals with the development of parallel algorithms for special linear systems such as banded ,Vandermonde ,Toeplitz ,and block Toeplitz systems. Part III addresses sparse matrix computations: (a) the development of parallel iterative linear system solvers with emphasis on scalable preconditioners, (b) parallel schemes for obtaining a few of the extreme eigenpairs or those contained in a given interval in the spectrum of a standard or generalized symmetric eigenvalue problem, and (c) parallel methods for computing a few of the extreme singular triplets. Part IV focuses on the development of parallel algorithms for matrix functions and special characteristics such as the matrix pseudospectrum and the determinant. The book also reviews the theoretical and practical background necessary when designing these algorithms and includes an extensive bibliography that will be useful to researchers and students alike. The book brings together many existing algorithms for the fundamental matrix computations that have a proven track record of efficient implementation in terms of data locality and data transfer on state-of-the-art systems, as well as several algorithms that are presented for the first time, focusing on the opportunities for parallelism and algorithm robustness.
An Introduction To Numerical Weather Prediction Techniques
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Author : T. N. Krishnamurti
language : en
Publisher: CRC Press
Release Date : 2018-05-11
An Introduction To Numerical Weather Prediction Techniques written by T. N. Krishnamurti and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-11 with Science categories.
An Introduction to Numerical Weather Prediction Techniques is unique in the meteorological field as it presents for the first time theories and software of complex dynamical and physical processes required for numerical modeling. It was first prepared as a manual for the training of the World Meteorological Organization's programs at a similar level. This new book updates these exercises and also includes the latest data sets. This book covers important aspects of numerical weather prediction techniques required at an introductory level. These techniques, ranging from simple one-dimensional space derivative to complex numerical models, are first described in theory and for most cases supported by fully tested computational software. The text discusses the fundamental physical parameterizations needed in numerical weather models, such as cumulus convection, radiative transfers, and surface energy fluxes calculations. The book gives the user all the necessary elements to build a numerical model. An Introduction to Numerical Weather Prediction Techniques is rich in illustrations, especially tables showing outputs from each individual algorithm presented. Selected figures using actual meteorological data are also used. This book is primarily intended for senior-level undergraduates and first-year graduate students in meteorology. It is also excellent for individual scientists who wish to use the book for self-study. Scientists dealing with geophysical data analysis or predictive models will find this book filled with useful techniques and data-processing algorithms.
Developments In Teracomputing
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Author : Walter Zwieflhofer
language : en
Publisher: World Scientific
Release Date : 2001
Developments In Teracomputing written by Walter Zwieflhofer and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Science categories.
The geosciences, particularly numerical weather prediction, are demanding the highest levels of available computer power. The European Centre for Medium-Range Weather Forecasts, with its experience in using supercomputers in this field, organises every second year a workshop bringing together manufacturers, computer scientists, researchers and operational users to share their experiences and to learn about the latest developments. This book reports on the November 2000 workshop. It provides an excellent overview of the latest achievements in, and plans for the use of, new parallel techniques in meteorology, climatology and oceanography. Contents: Research and Development of the Earth Simulator (K Yoshida & S Shingu); Parallel Computing at Canadian Meteorological Centre (J-P Toviessi et al.); Parallel Elliptic Solvers for the Implicit Global Variable-Resolution Grid-Point GEM Model: Iterative and Fast Direct Methods (A Qaddouri & J Ct(r)); IFS Developments (D Dent et al.); Performance of Parallelized Forecast and Analysis Models at JMA (Y Oikawa); Building a Scalable Parallel Architecture for Spectal GCMS (T N Venkatesh et al.); Semi-Implicit Spectral Element Methods for Atmospheric General Circulation Models (R D Loft & S J Thomas); Experiments with NCEP's Spectral Model (J-F Estrade et al.); The Implementation of I/O Servers in NCEP's ETA Model on the IBM SP (J Tuccillo); Implementation of a Complete Weather Forecasting Suite on PARAM 10 000 (S C Purohit et al.); Parallel Load Balance System of Regional Multiple Scale Advanced Prediction System (J Zhiyan); Grid Computing for Meteorology (G-R Hoffmann); The Requirements for an Active Archive at the Met Office (M Carter); Intelligent Support for High I/O Requirements of Leading Edge Scientific Codes on High-End Computing Systems OCo The ESTEDI Project (K Kleese & P Baumann); Coupled Marine Ecosystem Modelling on High-Performance Computers (M Ashworth et al.); OpenMP in the Physics Portion of the Met Office Model (R W Ford & P M Burton); Converting the Halo-Update Subroutine in the Met Office Unified Model to Co-Array Fortran (P M Burton et al.); Parallel Ice Dynamics in an Operational Baltic Sea Model (T Wilhelmsson); Parallel Coupling of Regional Atmosphere and Ocean Models (S Frickenhaus et al.); Dynamic Load Balancing for Atmospheric Models (G Karagiorgos et al.); HPC in Switzerland: New Developments in Numerical Weather Prediction (M Ballabio et al.); The Role of Advanced Computing in Future Weather Prediction (A E MacDonald); The Scalable Modeling System: A High-Level Alternative to MPI (M Govett et al.); Development of a Next-Generation Regional Weather Research and Forecast Model (J Michalakes et al.); Parallel Numerical Kernels for Climate Models (V Balaji); Using Accurate Arithmetics to Improve Numerical Reproducibility and Stability in Parallel Applications (Y He & C H Q Ding); Parallelization of a GCM Using a Hybrid Approach on the IBM SP2 (S Cocke & Z Christidis); Developments in High Performance Computing at Fleet Numerical Meteorology and Oceanography Center (K D Pollak & R M Clancy); The Computational Performance of the NCEP Seasonal Forecast Model on Fujitsu VPP5000 at ECMWF (H-M H Juang & M Kanamitsu); Panel Experience on Using High Performance Computing in Meteorology OCo Summary of the Discussion (P Prior). Readership: Researchers, professionals and students in meteorology, climatology and oceanography."
The Meteorological Magazine
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Author :
language : en
Publisher:
Release Date : 1989
The Meteorological Magazine written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Meteorology categories.
Physics Briefs
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Author :
language : en
Publisher:
Release Date : 1988
Physics Briefs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Physics categories.
Computer Modelling In The Environmental Sciences
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Author : D. G. Farmer
language : en
Publisher: Oxford University Press, USA
Release Date : 1991
Computer Modelling In The Environmental Sciences written by D. G. Farmer and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Music categories.
Provides a cross-section of current practices in computer modelling in the environmental sciences. Many of the topics are relevant to matters of topical public concern - global atmospheric effects and world climate, oceanographic phenomena and coastal flooding, pollution dispersal and acid rain.