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Author: Richard Lynn Hughes
Publisher:
ISBN:
Category : Atmospheric circulation
Languages : en
Pages : 123
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Book Description
Author: Richard Lynn Hughes
Publisher:
ISBN:
Category : Atmospheric circulation
Languages : en
Pages : 123
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Book Description
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: Jon Ander Arrillaga Mitxelena
Publisher: Springer Nature
ISBN: 303048579X
Category : Mathematics
Languages : en
Pages : 169
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Book Description
This book presents developments of novel techniques and applies them in order to understand the interactions between thermally driven mesoscale flows (sea and mountain breezes) and the turbulent exchange within the atmospheric boundary layer. These interactions are not accurately reproduced in the meteorological models currently employed for weather forecasting. Consequently, important variables such as air temperature and wind speed are misrepresented. Also, the concentrations of relevant greenhouse gases such as CO2 are considerably affected by these interactions. By applying a systematic algorithm based on objective criteria (presented here), the thesis explores complete observational databases spanning up to 10 years. Further, it presents statistically significant and robust results on the topic, which has only been studied in a handful of cases in the extant literature. Lastly, by applying the algorithm directly to the outputs of the meteorological model, the thesis helps readers understand the processes discussed and reveals the biases in such models.
Author: James Keith DeBoer
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 47
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Book Description
The validity of linear smoothing of topography for numerical weather prediction and the variation of mountain drag with mountain height and static stability are examined in the study. In the model a constant geostrophic current is perpendicular to the mountain range and the height of the mountain is independent of y. The hydrostatic Boussinesq equations are used with motion bounded at the top by a rigid plane at z = D.A modified coordinate system similar to Phillips' sigma system was used. Solutions were obtained using a smoothed mountain profile. These solutions were compared with smoothed solutions obtained from the unsmoothed mountain. The comparison of these solutions shows that an error is introduced when non-linear terms become sufficiently large. Values of the mountain drag for differing values of mountain height at a given static stability and for differing values of static stability at a given mountain height were computed. Mountain drag was found to vary quadratically with mountain height and linearly with static stability. (Author).
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.
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: John Lawrence Hayes
Publisher:
ISBN:
Category : Numerical weather forecasting
Languages : en
Pages : 0
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Book Description
The nature of the interaction of atmospheric flow with a mountain range of finite length is investigated. An inviscid, adiabatic primitive equation model is used to simulate steady, vertically-unsheared flow past a mountain range; various cases of mountain height and width are analyzed. A similar model for two-dimensional Boussinesq flow past a mountain on an f-plane is solved analytically following Merkine (1975) for comparison to the numerical solution. Results indicate that the atmospheric response is quite similar to that observed in the Boussinesq model. Ridging over the mountains and responses which damp in the vertical are observed in both models. Differences are noted in the magnitude of the response in the vicinity of the mountains and in the position of the downstream trough. In addition, the effect of finite difference model grid resolution is investigated by comparing simulations based on differing horizontal and vertical resolution. Results indicate that for larger scale mountains, the effect of poorer horizontal resolution is significant; vertical resolution, however, is relatively unimportant. As the horizontal scale of the mountains is reduced, vertical resolution becomes increasingly more important so that the effects of both horizontal and vertical resolution are significant. (Author).
Author: W. H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1475757859
Category : Science
Languages : en
Pages : 307
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 24 (thesis year 1979) a total of 10,033 theses titles from 26 Canadian and 215 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 24 reports these submitted in 1979, on occasion, certain universities do report theses submitted in previous years but not reported at the time.
Author: Xu Yigang
Publisher: Springer
ISBN: 1935704192
Category : Science
Languages : en
Pages : 1037
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Book Description
This book is a proceedings of the ‘International Symposium on the Qinghai-Xizang Plateau and Mountain Meteorology’, held in 20-24 March, 1984. It is a comprehensive summary of important research results in the field of mountain meteorology, including sub-topics such as field observation, dynamic and thermal effects of the mountains on general circulation, results obtained through the numerical models with the large-scale topography, and circulation systems on the Plateau.
Author: Stephen Michael Schrobo
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 0
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Book Description
A channeled model with a fine resolution nested grid is used to study the flow over a mountain range. The basic primitive equation model is frictionless and adiabatic, with no vertical shear. The nesting is accomplished using a scheme C staggered grid arrangement. The solutions are obtained for three categories: (a) coarse mesh solution, (b) uniform fine mesh solution, and (c) nested solution. Comparisons are made between solutions first with no mountain present, then with a mountain. During the early stages of the integration, the nested grid solution is improved over the coarse mesh solution. Difficulties arise at the boundaries, through, in both the coarse and fine meshes. Detailed discussions relating to these problems are presented, with suggestions on alternative boundary conditions. (Author).
