Download or read book Measurements of Condensation Coefficient Exhibited by Water Drops Grown on Rural Cloud Nuclei written by Abbas M. Sinnarwalla and published by . This book was released on 1974 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurements of the Condensation Coefficient for Water Drops Grown on Atmospheric Aerosols written by Vance Lee Behr and published by . This book was released on 1979 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1980 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1973 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Condensation of Vapor as Induced by Nuclei and Ions written by Carl Barus and published by . This book was released on 1908 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Modeling of the Early Stage of Cloud Formation in a Simulation Chamber written by Adel Nassif Saad and published by . This book was released on 1974 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A numerical model has been developed to simulate the growth of cloud droplets by condensation upon a spectrum of hygroscopic nuclei. The model is applicable to cloud simulation chamber conditions as well as to the study of the role of these nuclei on cloud base microstructure. Equations are given for the growth by condensation of water vapor on a population of hygroscopic nuclei in a volume being cooled by expansion. The equations are integrated simultaneously, using Hamming's modified predictor-corrector method for given initial conditions, to obtain the droplet size distribution, temperature, pressure, supersaturation, and liquid water content. Temperature fluctuations, sedimentation of droplets, seeding with hygroscopic nuclei, and the effect of surface films in retarding the growth of nuclei are also considered. By assuming homogeneous thermodynamic parameters and condensation nuclei distribution in the initial volume, the results for adiabatic expansion show a tendency for the droplet spectrum to narrow, similar to the results obtained for closed parcel models. Temperature fluctuations tend to broaden the spectrum. This broadening depends upon the amplitude, frequency of fluctuations, and the expansion rate of the volume. Sedimentation of droplets is shown to be a critical factor in limiting the rate of expansion and the time required to record reliable observations. Calculations on the effect of seeding nuclei after a certain time of spectrum development indicate that the seeding effect depends significantly on the concentration and size of nuclei inserted, and the time of insertion. The passivation of nuclei by surfactant shows that surface films, in general, serve to delay the formation of cloud droplets for a time, depending upon the initial film thickness, condensation coefficient, size spectrum distribution of the nuclei, and the cooling rate"--Abstract, leaves iii-iv.

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book THE VARIABILITY OF THE SATURATION RATIO IN CLOUDS written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : The saturation ratio determines the growth of cloud droplets by condensation and activation of aerosol particles. In a uniform environment, the interactions between the saturation ratio and cloud droplets are well understood. However, the presence of turbulent mixing causes spatial and temporal variability in the temperature, water vapor and the saturation ratio. When applied to a cloud, the variability in S has been shown to broaden the cloud droplet size distribution through each droplet having its own growth rate and history. When droplets grow by condensation or evaporation, water vapor and heat feedback with the environment, altering the distribution of the saturation ratio. This dissertation explores the nature of the variability in the saturation ratio in clouds using measurements and simulations of the Michigan Tech Pi chamber. Measurements of the Pi chamber show the Large Scale Circulation contributes to the variability of the saturation ratio. We have found the saturation ratio has significant fluctuations in both moist and cloudy conditions. Increasing the concentration of cloud condensation nuclei was shown to decrease the mean saturation ratio, however the variance was unchanged. Using a box model alongside the high resolution simulation of the Pi chamber, we found fluctuations in the saturation ratio cause aerosol particles to activate in mean subsaturated conditions. We show turbulent fluctuations in the supersaturation increases the concentration of cloud condensation nuclei, by increasing the efficiency of aerosol activation.

Download or read book Aerosol cloud Condensation Nuclei Closure at a Semi rural Site written by Rachel Ying-Wen Chang and published by . This book was released on 2006 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cloud condensation nuclei (CCN) are aerosols upon which cloud droplets nucleate. Given the importance of cloud formation to levels of incoming solar radiation and climate in general, it is essential that the aerosol-to-droplet activation process be well understood. In this study, our current understanding of cloud droplet formation is tested by comparing measured and calculated concentrations of CCN. Ambient concentrations were measured using a continuous flow thermal gradient diffusion chamber that was built and tested as a part of this work. Within uncertainties, measured concentrations are comparable to concentrations calculated using a two-component Kohler model that accounts for a varying soluble inorganic component and an insoluble organic component. Sensitivity analyses show that assumptions concerning water soluble organic compounds are not crucial but that those regarding surface tension are.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1987 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Pollution Abstracts written by and published by . This book was released on 1975-05 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air Pollution Abstracts written by and published by . This book was released on 1973-07 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Urban Climates written by T. R. Oke and published by Cambridge University Press. This book was released on 2017-09-14 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban Climates is the first full synthesis of modern scientific and applied research on urban climates. The book begins with an outline of what constitutes an urban ecosystem. It develops a comprehensive terminology for the subject using scale and surface classification as key constructs. It explains the physical principles governing the creation of distinct urban climates, such as airflow around buildings, the heat island, precipitation modification and air pollution, and it then illustrates how this knowledge can be applied to moderate the undesirable consequences of urban development and help create more sustainable and resilient cities. With urban climate science now a fully-fledged field, this timely book fulfills the need to bring together the disparate parts of climate research on cities into a coherent framework. It is an ideal resource for students and researchers in fields such as climatology, urban hydrology, air quality, environmental engineering and urban design.

Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1997 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acid Precipitation written by and published by . This book was released on 1985 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Air Pollution Technology written by Seymour Calvert and published by Wiley-Interscience. This book was released on 1984 with total page 1096 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical, up-to-date handbook presenting the essential principles, design methods, examples, useful data, and guides to more information on air pollution and its control. Comprehensive in scope, it will aid engineers in the design of cost-effective air pollution control systems. Contributors provide a clear account of what can be done to solve a problem, and what the limitations are.

Download or read book Practical Meteorology written by Roland Stull and published by Sundog Publishing, LLC. This book was released on 2018 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.