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Author: Frank W. Gibson Publisher: ISBN: Category : Aerosols Languages : en Pages : 42
Book Description
Optical scattering, under very clear atmospheric conditions, was measured in situ and analyzed. The experiments were made with a large balloonborne nephelometer launched from Holloman AFB, New Mexico and flown to 26 km altitude. Profiles of angular scattering and polarization properties of atmospheric aerosols show contrast with aerosol particles encountered in the troposphere and stratosphere. The results are compared with those obtained using particle counters under similar atmospheric conditions.
Author: Frank W. Gibson Publisher: ISBN: Category : Aerosols Languages : en Pages : 42
Book Description
Optical scattering, under very clear atmospheric conditions, was measured in situ and analyzed. The experiments were made with a large balloonborne nephelometer launched from Holloman AFB, New Mexico and flown to 26 km altitude. Profiles of angular scattering and polarization properties of atmospheric aerosols show contrast with aerosol particles encountered in the troposphere and stratosphere. The results are compared with those obtained using particle counters under similar atmospheric conditions.
Author: Publisher: ISBN: Category : Aerosols Languages : en Pages : 34
Book Description
Optical scattering, under very clear atmospheric conditions, was measured in situ and analyzed. The experiments were made with a large balloonborne nephelometer launched from Holloman AFB, New Mexico and flown to 26 km altitude. Profiles of angular scattering and polarization properties of atmospheric aerosols show contrast with aerosol particles encountered in the troposphere and stratosphere. The results are compared with those obtained using particle counters under similar atmospheric conditions.
Author: Alexander A. Kokhanovsky Publisher: Springer Science & Business Media ISBN: 3540499091 Category : Science Languages : en Pages : 154
Book Description
This new text offers experienced students a comprehensive review of available techniques for the remote sensing of aerosols. These small particles influence both atmospheric visibility and the thermodynamics of the atmosphere. They are also of great importance in any consideration of climate change problems. Aerosols may also be responsible for the loss of harvests, human health problems and ecological disasters. Thus, this detailed study of aerosol properties on a global scale could not be more timely.
Author: Wiesje Mooiweer Publisher: ProQuest ISBN: 9781109180466 Category : Atmospheric aerosols Languages : en Pages : 182
Book Description
Particulates that form the atmospheric aerosol play a significant role in determining Earth's climate, both directly through scattering and absorption of solar radiation, and indirectly by impacting cloud formation processes. They are present in a large range of sizes, concentrations, chemical compositions, and compositional inhomogeneities, complicating our ability to quantify the aerosol's direct and indirect effects. This work investigates the dependence of aerosol light scattering on relative humidity (RH) and chemical composition, and the effect of organic material on scattering enhancement and implied particle growth characteristics. It utilizes measurements carried out in the Elk Mountain/Laramie Aerosol Characterization Experiment (EMLACE), in which observations were made at both a clean high-altitude mid-continental site (Elk Mountain, WY) in summer (2006), and in a small urban environment (Laramie, WY) during both summer (2005) and winter (2006). High time resolution measurements of scattering extinction from both dry and humidified PM 1 aerosols were obtained together with time resolved measurements of PM 1 volatile aerosol chemical composition and mass loading. Variabilities in particle chemical composition and optical behavior with location and season are documented. Scattering extinction is positively correlated with aerosol mass loading. Enhanced scattering, due to water uptake by the particles at high RH, is described by a scattering enhancement factor (f(RH)), which is found to be smaller with increasing mass fraction of organic material. Observed f(RH) values are interpreted in terms of mass weighted contributions (f(RH high) Inorg and f(RH high) Org) from the particulate inorganic and organic material at high RH. Analyses show that whereas f(RH high) Inorg varies continually, depending on the physical and chemical properties of the aerosol, the experimental data can, in general, be adequately interpreted using a value of 1.0 for f(RH high) Org (though values up to 1.1 are occasionally indicated), suggesting that organic material does not significantly promote increased scattering at high RH. Numerical values of f(RH high) Inorg and f(RH high) Org were used to develop an empirical parameterization of changes in aerosol optical properties with increasing RH, based solely on variations in particulate chemical composition. This parameterization successfully reconstructs variations in f(RH) for the observed ambient aerosols over the entire range of RH values employed in the experiments.
Author: Kirill Ya. Kondratyev Publisher: Springer Science & Business Media ISBN: 3540376984 Category : Science Languages : en Pages : 595
Book Description
This book provides the first comprehensive analysis of how aerosols form in the atmosphere through in situ processes as well as via transport from the surface (dust storms, seas spray, biogenic emissions, forest fires etc.). Such an analysis has been followed by the consideration of both observation data (various field observational experiments) and numerical modeling results to assess climate impacts of aerosols bearing in mind that these impacts are the most significant uncertainty in studying natural and anthropogenic causes of climate change.
Author: William C. Hinds Publisher: John Wiley & Sons ISBN: 1118591976 Category : Technology & Engineering Languages : en Pages : 411
Book Description
The #1 guide to aerosol science and technology -now better than ever Since 1982, Aerosol Technology has been the text of choice among students and professionals who need to acquire a thorough working knowledge of modern aerosol theory and applications. Now revised to reflect the considerable advances that have been made over the past seventeen years across a broad spectrum of aerosol-related application areas - from occupational hygiene and biomedical technology to microelectronics and pollution control -this new edition includes: * A chapter on bioaerosols * New sections on resuspension, transport losses, respiratory deposition models, and fractal characterization of particles * Expanded coverage of atmospheric aerosols, including background aerosols and urban aerosols * A section on the impact of aerosols on global warming and ozone depletion. Aerosol Technology, Second Edition also features dozens of new, fully worked examples drawn from a wide range of industrial and research settings, plus new chapter-end practice problems to help readers master the material quickly.
Author: Frank W. Gibson
Author: Frank W. Gibson
Author: 
Author: Frank W. Gibson
Author: 
Author: Louis Elterman
Author: Keith Eric Grant
Author: Alexander A. Kokhanovsky
Author: Wiesje Mooiweer
Author: Kirill Ya. Kondratyev
Author: William C. Hinds