Download or read book Characterization of the Atmospheric Boundary Layer in Complex Terrain and Results from the AMADEUS Dispersion Experiments written by David Fleming Brown and published by . This book was released on 1992 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment and Computerized Modeling of the Environmental Deposition of Military Smokes Characterization of the Atmospheric Boundary Layer in Complex Terrain and Results from the Amadeus Smoke Dispersion Experiments written by D. F. Brown and published by . This book was released on 1991 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes our analysis of the AMADEUS meteorological data Preliminary analysis (also given in Brown et al. 1990) of these data for each of the smoke-release periods include: (1) computation of averages of the surface-station and micrometeorological measurements (wind speed, wind direction, temperature), (2) stability characterization by analysis of bulk Richardson numbers and wind direction standard deviations, (3) examination of vertical heat and momentum fluxes from sonic-anemometer data, (4) analysis of spectra computed using 1-Hz micrometeorological data and (5) determination of boundary-layer height from the instrumented balloon soundings. Additional results given in this report include: (1) an analysis of vertical wind profiles, (2) comparisons of Meadowbrook data to similarity-based empirical relations and (3) a comprehensive analysis of the noctumal down-slope flows. The results show that the meteorological data are consistent, both internally and with other studies of the atmospheric boundary layer. The daytime convective conditions reveal a high degree of coherency, whereas the nighttime stable conditions are more spatially heterogeneous and less coherent. Analysis of surface-station data has shown that the characteristics of the nocturnal downslope flows in the Meadowbrook valleys are influenced by a combination of local cooling, local surface conditions and mesoscale drainage flows external to the Meadowbrook system. These data appear to offer significant potential for improving the state of dispersion modeling in this important area. RA 3, smoke, screening smoke, obscuring smoke, hexachloroethane, gas chromatography.
Download or read book Characterisation of the Atmospheric Boundary Layer in a Complex Terrain Using SODAR RASS written by Jens-Christopher Mayer and published by . This book was released on 2005 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1992-12 with total page 2022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boundary Layer Structure written by Hadassah Kaplan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, we present the lectures given during the 1984 OHOLO Conference, held in Zichron Yaacov, Israel. The Conference was organized by the Israel Institute for Biological Research, Department of Mathematics, which is involved in Environmental Risk Evaluation, and in Projects Estimating the Potential of Wind Energy. The lectures cover a broad spectrum of mathematical models, ranging from those that deal with the solution of atmospheric conservation equations, and to those models that yield empirical estimates based on real time measure ments and thus are unique to the locale where measured. The goal of the Conference was to allow scientists from various countries to meet and discuss topics of mutual interest, including the following: 1. Structure of the boundary layer - primarily models dealing in the understanding of the various processes of atmospheric energy transfer, and their influence on the size and composition of the boundary 1 ayer. 2. Advanced mathematical techniques for describing flow and diffusion - lectures on approximations and techniques for solving the diffu sion and transport equations. 3. Flow over complex terrain - research into various aspects of the problem - mathematical models, physical models, experimental results. 4. Models of pollution transport and deposition.
Download or read book Assessment and Computerized Modeling of the Environmental Deposition of Military Smokes Analysis of Meteorological Data from the AMADEUS Smoke Dispersion Experiments written by D. F. Brown and published by . This book was released on 1990 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the meteorological data collected as part of the AMADEUS dispersion experiments. In addition, a preliminary analysis of these data was carried out. Averages of the surface-station and micrometeorological measurements were computed for each of 12 smoke release periods. Also, the stability of the atmosphere during these tests was characterized by analyzing (1) the standard deviation of the horizontal wind direction; (2) the bulk Richardson number; (3) the vertical profiles of wind and atmospheric temperature; and (4) direct measurements of the vertical heat and momentum fluxes. For four of the five daytime releases, the height of the boundary layer was determined from instrumented balloon soundings. Results show that the meteorological data are complete and consistent, both internally and with other studies of the atmospheric boundary level. The daytime convective conditions reveal a high degree of coherency, whereas the nighttime stable conditions are more spatially heterogeneous and less coherent. The stable boundary layer is generally less well understood than is the convective boundary layer, especially in a complex terrain setting. The data appear to offer significant potential for improving the state of dispersion modeling in this important area.
Download or read book The Neutral Atmospheric Boundary Layer Over Complex Terrain written by William Peter Kustas and published by . This book was released on 1983 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book WADOCT an Atmospheric Dispersion Model for Complex Terrain written by Bruce A. Kunkel and published by . This book was released on 1990 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Modeling the Dispersion of Vapor and Aerosol Particulates in the Atmospheric Boundary Layer written by and published by . This book was released on 2001 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this project is to improve our scientific understanding of dispersion issues over complex terrain and publish results in scientific journals. Three scientific articles and one student's Master thesis are under preparation based on the results supported by this project. The first paper, entitled "The role of advection of fluxes on modeling dispersion in convective boundary layers", is aimed at examining the importance of the advection terms for dispersion in a convective boundary layer. An Eulerian three-dimensional higher-order closure dispersion model is presented. The model uses mean wind and turbulence values from a second order atmospheric boundary layer model. The dispersion model is validated against results from tank and field experiments and compared to results from Lagrangian dispersion models. The results show good agreement with experiment and Lagrangian modeling results for point source dispersion in a convective boundary layer. Sensitivity studies of the model helped to identify the roles that advection and horizontal transport terms in the equations for the fluxes play in simulating the essential features of pollutant dispersion. The results from the sensitivity tests show that the famous features of dispersion from a point source in the convective boundary layer - with an ascending plume during ground level release and descending for a lifted point source - is caused by the advection term in the equation for the vertical flux. Furthermore, it is shown that there is a tendency for the plume to split horizontally, which is also caused by the advection term in horizontal fluxes.
Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1993 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atmospheric Boundary Layers written by Alexander Baklanov and published by Springer Science & Business Media. This book was released on 2007-10-30 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents peer-reviewed papers from the NATO Advanced Research Workshop on Atmospheric Boundary Layers held in April 2006. The papers are divided into thematic sessions: nature and theory of turbulent boundary layers; boundary-layer flows: modeling and applications to environmental security; nature, theory and modeling of boundary-layer flows; air flows within and above urban and other complex canopies: air-sea-ice interaction.
Download or read book Atmospheric Boundary Layer Modeling in Complex Terrain written by Yu Song and published by . This book was released on 1998 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Atmospheric Boundary Layer for Engineers written by R. S. Azad and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 589 pages. Available in PDF, EPUB and Kindle. Book excerpt: While I was participating in the IUTAM Symposium on Structure of Turbulence and Drag Reduction in Zurich, Switzerland, in 1989, I was approached by Prof. Dr. Themistocles Dracos to give a course oflectures on the Atmospheric Boundary Layer during my sabbatical leave at Eidgenossische Technische Hochschule (ETH) Zurich - Hoenggerberg in 1991. His reason for the suggestion was the growing interest in the environment and its dynamics created by flow in the Atmospheric Boundary Layer. I have been teaching boundary layer to undergraduate and graduate students for more than twenty five years, so I agreed to give a series of lectures on boundary layer of the atmosphere. From the start I thought very seriously about the problem and consulted all the published works in English on the Atmospheric Boundary Layer (ABL). First consider the topography of the Earth which has oceans calm and turbulent, mountain ranges of height up to 9 km, lands of variable height with forests, food growing vegetable and deserts. The shape of the Earth is nearly spherical except at the north and south poles. Sun supplies the energy to drive circulation of air around the Earth's atmosphere which for all practical purposes occupies the region up to about 10 to 11 km. This brief scenerio of Earth's topography reveals the complexity of flow very close to the Earth's surface that is hardly flat except at the oceans' surface which consists of about 70% of the total Earth's surface.
Download or read book Annual Report 1989 90 written by New Brunswick. Department of Transportation and published by . This book was released on 1991 with total page 1272 pages. Available in PDF, EPUB and Kindle. Book excerpt: General activity review of associated branches and agencies to the Department which includes corporate securities registrations, a list of tenders received, and general financial data. Branches and agencies reviewed are responsible for motor vehicle activity, highway construction, traffic engineering, telecommunications and public utilities.
Download or read book The Atmospheric Boundary Layer written by J. R. Garratt and published by Cambridge University Press. This book was released on 1994-04-21 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gives a comprehensive and lucid account of the science of the atmospheric boundary layer (ABL). There is an emphasis on the application of the ABL to numerical modelling of the climate. The book comprises nine chapters, several appendices (data tables, information sources, physical constants) and an extensive reference list. Chapter 1 serves as an introduction, with chapters 2 and 3 dealing with the development of mean and turbulence equations, and the many scaling laws and theories that are the cornerstone of any serious ABL treatment. Modelling of the ABL is crucially dependent for its realism on the surface boundary conditions, and chapters 4 and 5 deal with aerodynamic and energy considerations, with attention to both dry and wet land surfaces and sea. The structure of the clear-sky, thermally stratified ABL is treated in chapter 6, including the convective and stable cases over homogeneous land, the marine ABL and the internal boundary layer at the coastline. Chapter 7 then extends the discussion to the cloudy ABL. This is seen as particularly relevant, since the extensive stratocumulus regions over the subtropical oceans and stratus regions over the Arctic are now identified as key players in the climate system. Finally, chapters 8 and 9 bring much of the book's material together in a discussion of appropriate ABL and surface parameterization schemes in general circulation models of the atmosphere that are being used for climate simulation.
Download or read book Numerical Modelling of Atmospheric Boundary layer Flows Over Complex Terrain written by Massimiliano Burlando and published by . This book was released on 2004 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
