An Efficient Mesoscale Three-dimensional Numerical Wind Field Model for Regions with Complex Terrain PDF Download
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Author: David Randall Suder
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Author: David Randall Suder
Publisher:
ISBN:
Category :
Languages : en
Pages : 204
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Author: Nelson L. Seaman
Publisher:
ISBN:
Category : Cloud physics
Languages : en
Pages : 86
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Book Description
A hydrostatic primitive equation meteorological model has been adapted to the small end of mesoscale and applied to two cases of wintertime flow in southern Wyoming. Emphasis has been placed on simulation of orographic, and low-level thermal and frictional forcing processes that modify the larger synoptic scale flow. The experiments considered two scales of mesoscale forcing in three-dimensional domains: (1) the 200-250 km scale in which mountain ranges withing the Rocky Mountain region can be resolved, and (2) the 30-40 km scale in which localized flow about a particular terrain feature can be simulated. The model produced reasonable simulations on both domain scales that are in general agreement with standard theories of orographic and thermally forced flows. Most significantly, comparison of numerical solutions with aircraft observations in the domain revealed that the model produced detailed and accurate results in realistic, complex situations. The considerable skill demonstrated by the model on the small end of the mesoscale indicates important applications are possible. Such a numerical model may be highly useful in providing guidance for such tasks as power plant sight studies, wind energy prospecting, and wintertime precipitation enhancement programs.
Author: Michael A. Fosberg
Publisher:
ISBN:
Category : Air flow
Languages : en
Pages : 12
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Author: Ken Kaung Lai
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 256
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464
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Author: Mark Alan Yocke
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages :
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Author: Roger A Pielke Sr
Publisher: Academic Press
ISBN: 0123852382
Category : Science
Languages : en
Pages : 743
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Book Description
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
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 67
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Book Description
Over the past several decades, the development of computer models to predict the atmospheric transport of hazardous material across a local (on the order of 10s of km) to mesoscale (on the order of 100s of km) region has received considerable attention, for both regulatory purposes, and to guide emergency response teams. Wind inputs to these models cover a spectrum of sophistication and required resources. At one end is the interpolation/extrapolation of available observations, which can be done rapidly, but at the risk of missing important local phenomena. Such a model can also only describe the wind at the time the observations were made. At the other end are sophisticated numerical solutions based on so-called Primitive Equation models. These prognostic models, so-called because in principle they can forecast future conditions, contain the most physics, but can easily consume tens of hours, if not days, of computer time. They may also require orders of magnitude more effort to set up, as both boundary and initial conditions on all the relevant variables must be supplied. The subject of this report is two classes of models intermediate in sophistication between the interpolated and prognostic ends of the spectrum. The first, known as mass-consistent (sometimes referred to as diagnostic) models, attempt to strike a compromise between simple interpolation and the complexity of the Primitive Equation models by satisfying only the conservation of mass (continuity) equation. The second class considered here consists of the so-called linear models, which purport to satisfy both mass and momentum balances. A review of the published literature on these models over the past few decades was performed. Though diagnostic models use a variety of approaches, they tend to fall into a relatively few well-defined categories. Linear models, on the other hand, follow a more uniform methodology, though they differ in detail. The discussion considers the theoretical underpinnings of each category of the diagnostic models, and the linear models, in order to assess the advantages and disadvantages of each. It is concluded that diagnostic models are the better suited of the two for predicting the atmospheric dispersion of hazardous materials in emergency response scenarios, as the linear models are only able to accommodate gently-sloping terrain, and are predicated on several simplifying approximations which can be difficult to justify a priori. Of the various approaches used in diagnostic modeling, that based on the calculus of variations appears to be the most objective, in that it introduces the fewest number of arbitrary parameters. The strengths and weaknesses of models in this category, as they relate to the activities of Sandia's Nuclear Emergency Support Team (NEST), are further highlighted.
Author: Mark A. Yocke
Publisher:
ISBN:
Category : Air quality
Languages : en
Pages : 126
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Book Description
Author: Roger A. Pielke
Publisher: Elsevier
ISBN: 008092526X
Category : Science
Languages : en
Pages : 625
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Book Description
To effectively utilize mesoscale dynamical simulations of the atmosphere, it is necessary to have an understanding the basic physical and mathematical foundations of the models and to have an appreciation of how a particular atmospheric system works. Mesoscale Meteorological Modeling provides such an overview of mesoscale numerical modeling. Starting with fundamental concepts, this text can be used to evaluate the scientific basis of any simulation model that has been or will be developed. Basic material is provided for the beginner as well as more in-depth treatment for the specialist. This text is useful to both the practitioner and the researcher of the mesoscale phenomena.
