Case Studies Of The Structure Of The Atmospheric Boundary Layer Entrainment Zone

Author : Timothy D. Crum
Publisher : Unknown
Page : 542 pages
File Size : 41,7 Mb
Release : 1985
Category : Electronic
ISBN : WISC:89012571147

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Case Studies of the Structure of the Atmospheric Boundary Layer Entrainment Zone by Timothy D. Crum Pdf

The structure of the atmospheric entrainment zone, an interfacial layer between the convective boundary layer and the stable air aloft, is studied using data obtained during Boundary Layer Experiment 1983 in Oklahoma. Coincident high resolution aircraft and lidar observations provided a unique picture of the daytime continental entrainment zone. Fast-response Lyman alpha hygrometer output voltages from the aircraft are calibrated to yield meteorological units of humidity. Humidity values indicative of surface layer air are observed at all levels within rising thermals, and the corresponding top-hat humidity cross sections suggest little lateral entrainment. Two approaches are taken to describe the humidity structure of the entrainment zone. The first uses the linear mixing character of specific humidity. This yields vertical profiles of the proportion of surface layer air that are described well by the cumulative distribution function of asymmetrical double exponential functions. The second approach models frequency distributions of three types of air in the entrainment zone: unmixed free atmosphere (dry); unmixed surface layer air (moist); and a mixture of these two. These results can be useful in cloud models and for future studies of the boundary layer.

Author : Anonim
Publisher : Unknown
Page : 456 pages
File Size : 51,9 Mb
Release : 1995
Category : Aeronautics
ISBN : MINN:30000006324606

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Scientific and Technical Aerospace Reports by Anonim Pdf

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.

Author : Roland Stull
Publisher : Sundog Publishing, LLC
Page : 942 pages
File Size : 49,6 Mb
Release : 2018
Category : Science
ISBN : 0888652836

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Practical Meteorology by Roland Stull Pdf

A quantitative introduction to atmospheric science for students and professionals who want to understand and apply basic meteorological concepts but who are not ready for calculus.

Author : Sven-Erik Gryning,M.M. Millán
Publisher : Springer Science & Business Media
Page : 674 pages
File Size : 51,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9781461518174

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Air Pollution Modeling and Its Application X by Sven-Erik Gryning,M.M. Millán Pdf

The 20th International Technical Meeting on Air Pollution Modelling and Its Application was held in Valencia, Spain, during late 1993. At this conference, a new record of abstracts was submitted, a new record of scientists participated, and a new record of countries was represented. This clearly indicates society's continuous and growing interest in, as well as importance of, the complexities associated with the modelling of air pollution. The conference addressed the following main subjects: integrated regional modelling, global and long-range transport, new modelling developments, accidental releases, and model assess ment and verification. In addition, two project-oriented workshops were organized as part of the conference. The many contributing authors and scientists taking active part in the discussions following the papers, have made this proceeding a record of the current status in the field of air pollu tion modelling. We want to express our gratitude to their efforts. We also wish to extend our gratitude to the sponsors that made this conference possible. In addition to financial support from NATOjCCMS the conference received contributions from CEAM, the European Asso ciation for the Science of Air Pollution, Danish Center for Air Research, and Ris0 National Laboratory. A special grant was given by NATOjCCMS to facilitate attendance of scientists from Central and Eastern Europe. We also wish to express our gratitude to Rosa Salvador and Pilar Zamora of CEAM, who laboriously organized the conference pre-proceedings, and to Anne N0rregaard and Ulla Riis Christiansen of Ris0 National Laboratory, who seved as conference secretariat.

Author : A. Gyr,Franz-S. Rys
Publisher : Springer Science & Business Media
Page : 224 pages
File Size : 52,6 Mb
Release : 2013-03-09
Category : Science
ISBN : 9789401585477

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Diffusion and Transport of Pollutants in Atmospheric Mesoscale Flow Fields by A. Gyr,Franz-S. Rys Pdf

In regions as densely populated as Western Europe, prediction of the ecological implications of pollutant transport are important in order to minimise damage in the case of accidents, and to evaluate the possible influence of existing or planned sources. In most cases, such predictions depend on high-speed computation. The present textbook presents a mathematically explicit introduction in eight chapters: 1: An introduction to the basics of fluid dynamics of the atmosphere and the local events and mesoscale processes. 2: The types of PDEs describing atmospheric flows for limited area models, the problem of appropriate boundary conditions describing the topographical constraints, and well-posedness. 3: Thermodynamics of the atmosphere, dry and wet, its stability, and radiation processes, budgets and the influence of their sum. 4: Scaling and similarity laws for stable and convective turbulent atmospheric boundary layers and the influence of inhomogeneous terrain on the advection and the vertical dispersion, and the method of large eddy simulation. 5: Statistical processes in turbulent dispersion, turbulent diffusion and chemical reactions in fluxes. 6: Theoretical modelling of diffusion and dispersion of pollutant gases. 7: The influence of urban heat production on local climate. 8: Atmospheric inversion layers and lapping inversion, the stable boundary layer and nocturnal inversion.

Author : Anonim
Publisher : Unknown
Page : 866 pages
File Size : 54,9 Mb
Release : 1988
Category : Pollution
ISBN : STANFORD:36105007169605

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Pollution Abstracts by Anonim Pdf

Indexes material from conference proceedings and hard-to-find documents, in addition to journal articles. Over 1,000 journals are indexed and literature published from 1981 to the present is covered. Topics in pollution and its management are extensively covered from the standpoints of atmosphere, emissions, mathematical models, effects on people and animals, and environmental action. Major areas of coverage include: air pollution, marine pollution, freshwater pollution, sewage and wastewater treatment, waste management, land pollution, toxicology and health, noise, and radiation.

Author : Zbigniew Sorbjan
Publisher : Unknown
Page : 344 pages
File Size : 51,8 Mb
Release : 1989
Category : Science
ISBN : UOM:39015021906949

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Structure of the Atmospheric Boundary Layer by Zbigniew Sorbjan Pdf

Author : J. R. Garratt
Publisher : Cambridge University Press
Page : 340 pages
File Size : 44,8 Mb
Release : 1994-04-21
Category : Mathematics
ISBN : 0521467454

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The Atmospheric Boundary Layer by J. R. Garratt Pdf

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.

Author : Roger E. Vachalek
Publisher : Unknown
Page : 388 pages
File Size : 54,6 Mb
Release : 1987
Category : Electronic
ISBN : WISC:89014913297

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Case Studies of Divergence and Vertical Velocities Calculated Using Different Sensing Systems by Roger E. Vachalek Pdf

Author : Ian S. F. Jones,Yoshiaki Toba
Publisher : Cambridge University Press
Page : 277 pages
File Size : 43,7 Mb
Release : 2001-09-24
Category : Mathematics
ISBN : 9780521662437

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Wind Stress Over the Ocean by Ian S. F. Jones,Yoshiaki Toba Pdf

A comprehensive 2001 volume for researchers and graduate students in oceanography, meteorology, fluid dynamics and coastal engineering.

Author : Hadassah Kaplan,Nathan Dinar
Publisher : Springer Science & Business Media
Page : 480 pages
File Size : 48,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400965140

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Boundary Layer Structure by Hadassah Kaplan,Nathan Dinar Pdf

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.

Author : Erich J. Plate,E.E. Fedorovich,Domingos X. Viegas,J.C. Wyngaard
Publisher : Springer Science & Business Media
Page : 493 pages
File Size : 47,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789401150583

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Buoyant Convection in Geophysical Flows by Erich J. Plate,E.E. Fedorovich,Domingos X. Viegas,J.C. Wyngaard Pdf

Studies of convection in geophysical flows constitute an advanced and rapidly developing area of research that is relevant to problems of the natural environment. During the last decade, significant progress has been achieved in the field as a result of both experimental studies and numerical modelling. This led to the principal revision of the widely held view on buoyancy-driven turbulent flows comprising an organised mean component with superimposed chaotic turbulence. An intermediate type of motion, represented by coherent structures, has been found to play a key role in geophysical boundary layers and in larger scale atmospheric and hydrospheric circulations driven by buoyant forcing. New aspects of the interaction between convective motions and rotation have recently been discovered and investigated. Extensive experimental data have also been collected on the role of convection in cloud dynamics and microphysics. New theoretical concepts and approaches have been outlined regarding scaling and parameterization of physical processes in buoyancy-driven geophysical flows. The book summarizes interdisciplinary studies of buoyancy effects in different media (atmosphere and hydrosphere) over a wide range of scales (small scale phenomena in unstably stratified and convectively mixed layers to deep convection in the atmosphere and ocean), by different research methods (field measurements, laboratory simulations, numerical modelling), and within a variety of application areas (dispersion of pollutants, weather forecasting, hazardous phenomena associated with buoyant forcing).

Author : Jordi Vil...-Guerau de Arellano,Chiel C. van Heerwaarden,Bart J. H. van Stratum,Kees van den Dries
Publisher : Cambridge University Press
Page : 283 pages
File Size : 43,5 Mb
Release : 2015-06-04
Category : Nature
ISBN : 9781107090941

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Atmospheric Boundary Layer by Jordi Vil...-Guerau de Arellano,Chiel C. van Heerwaarden,Bart J. H. van Stratum,Kees van den Dries Pdf

Based on more than 20 years of research and lecturing, Jordi Vil...-Guerau de Arellano and his team's textbook provides an excellent introduction to the interactions between the atmosphere and the land for advanced undergraduate and graduate students and a reference text for researchers in atmospheric physics and chemistry, hydrology, and plant physiology. The combination of the book, which provides the essential theoretical concepts, and the associated interactive Chemistry Land-surface Atmosphere Soil Slab (CLASS) software, which provides hands-on practical exercises and allows students to design their own numerical experiments, will prove invaluable for learning about many aspects of the soil-vegetation-atmosphere system. This book has a modular and flexible structure, allowing instructors to accommodate it to their own learning-outcome needs.

Author : Anonim
Publisher : Unknown
Page : 692 pages
File Size : 47,7 Mb
Release : 1986
Category : Mechanics, Applied
ISBN : OSU:32435026160820

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Applied Mechanics Reviews by Anonim Pdf

Author : Roland B. Stull
Publisher : Springer Science & Business Media
Page : 671 pages
File Size : 54,9 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400930278

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An Introduction to Boundary Layer Meteorology by Roland B. Stull Pdf

Part of the excitement in boundary-layer meteorology is the challenge associated with turbulent flow - one of the unsolved problems in classical physics. An additional attraction of the filed is the rich diversity of topics and research methods that are collected under the umbrella-term of boundary-layer meteorology. The flavor of the challenges and the excitement associated with the study of the atmospheric boundary layer are captured in this textbook. Fundamental concepts and mathematics are presented prior to their use, physical interpretations of the terms in equations are given, sample data are shown, examples are solved, and exercises are included. The work should also be considered as a major reference and as a review of the literature, since it includes tables of parameterizatlons, procedures, filed experiments, useful constants, and graphs of various phenomena under a variety of conditions. It is assumed that the work will be used at the beginning graduate level for students with an undergraduate background in meteorology, but the author envisions, and has catered for, a heterogeneity in the background and experience of his readers.