Molecular Beam Studies of Particle-surface Interactions with Emphasis on Atmospheric Ice Particles PDF Download

Author: Patrik Andersson
Publisher:
ISBN: 9789162837068
Category : Amas particules
Languages : en
Pages : 62

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Author: Liza Romero Lejonthun
Publisher:
ISBN: 9789163356278
Category :
Languages : en
Pages : 92

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Book Description

Author: Ricardo Diez Muino
Publisher: Springer Science & Business Media
ISBN: 3642329551
Category : Science
Languages : en
Pages : 439

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Book Description
This book gives a representative survey of the state of the art of research on gas-surface interactions. It provides an overview of the current understanding of gas surface dynamics and, in particular, of the reactive and non-reactive processes of atoms and small molecules at surfaces. Leading scientists in the field, both from the theoretical and the experimental sides, write in this book about their most recent advances. Surface science grew as an interdisciplinary research area over the last decades, mostly because of new experimental technologies (ultra-high vacuum, for instance), as well as because of a novel paradigm, the ‘surface science’ approach. The book describes the second transformation which is now taking place pushed by the availability of powerful quantum-mechanical theoretical methods implemented numerically. In the book, experiment and theory progress hand in hand with an unprecedented degree of accuracy and control. The book presents how modern surface science targets the atomic-level understanding of physical and chemical processes at surfaces, with particular emphasis on dynamical aspects. This book is a reference in the field.

Author: Martina Suter
Publisher:
ISBN: 9789162870782
Category :
Languages : en
Pages : 34

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Book Description

Author: Pao K. Wang
Publisher: Elsevier
ISBN: 0080508448
Category : Science
Languages : en
Pages : 287

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Book Description
Atmospheric ice particles play crucial roles in cloud and storm dynamics, atmospheric chemistry, climatological processes, and other atmospheric processes. Ice Microdynamics introduces the elementary physics and dynamics of atmospheric ice particles in clouds; subsequent sections explain their formation from water vapor, why ice crystal shape and concentration in cirrus clouds influence the heating of air, and describe how ice crystals cleanse the atmosphere by scavenging aerosol particles. Pao Wang's lucid writing style will appeal to atmospheric scientists, climatologists, and meteorologists with an interest in understanding the role of ice particles in the atmosphere of our planet.

Author: Kuo-Nan Liou
Publisher: Cambridge University Press
ISBN: 0521889162
Category : Science
Languages : en
Pages : 461

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Book Description
This volume outlines the fundamentals and applications of light scattering, absorption and polarization processes involving ice crystals.

Author: Peter S. Liss
Publisher: Springer
ISBN: 3642256430
Category : Science
Languages : en
Pages : 315

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Book Description
The oceans and atmosphere interact through various processes, including the transfer of momentum, heat, gases and particles. In this book leading international experts come together to provide a state-of-the-art account of these exchanges and their role in the Earth-system, with particular focus on gases and particles. Chapters in the book cover: i) the ocean-atmosphere exchange of short-lived trace gases; ii) mechanisms and models of interfacial exchange (including transfer velocity parameterisations); iii) ocean-atmosphere exchange of the greenhouse gases carbon dioxide, methane and nitrous oxide; iv) ocean atmosphere exchange of particles and v) current and future data collection and synthesis efforts. The scope of the book extends to the biogeochemical responses to emitted / deposited material and interactions and feedbacks in the wider Earth-system context. This work constitutes a highly detailed synthesis and reference; of interest to higher-level university students (Masters, PhD) and researchers in ocean-atmosphere interactions and related fields (Earth-system science, marine / atmospheric biogeochemistry / climate). Production of this book was supported and funded by the EU COST Action 735 and coordinated by the International SOLAS (Surface Ocean- Lower Atmosphere Study) project office.

Author: Werner Kuhs
Publisher: Royal Society of Chemistry
ISBN: 1847557775
Category : Science
Languages : en
Pages : 721

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Book Description
Physics and Chemistry of Ice is an authoritative summary of state-of the-art research contributions from the world's leading scientists. A key selection of submissions from the 11th International Conference on the Physics and Chemistry of Ice, 2006 are presented here with a foreword by Werner F. Kuhs. An invaluable resource, this book provides researchers and professionals with up-to-date coverage on a wide range of areas in ice science including: * Spectroscopic and diffraction studies * Molecular dynamics simulations * Studies of Ice Mechanics * Quantum mechanical ab initio calculations * Ice and hydrate crystal growth and inhibition studies * Bulk and surface properties of ice and gas hydrates * Snow physics and chemistry This insight into topical aspects of ice research is a key point of reference for physicists, chemists, glaciologists, cryo-biologists and professionals working in the fields of ice and hydrogen bonding.

Author: Sarah Sihvonen
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description
Aerosol particles impact the climate by serving as the seeds to form water droplets and ice to form clouds. However, these aerosol-cloud interactions are the least understood aspect of our understanding of the climate system. Mineral dust aerosol is the largest global source of ice nucleating particles. During atmospheric transport, mineral dust can be exposed to sulfuric acid, which has been shown to decrease the ice nucleation activity of these particles. Many explanations for this observation, such as chemical changes to the surface or product formation that blocks active sites, have been suggested. Our research focused on building a molecular picture of these surfaces to understand why sulfuric acid exposure reduces the ice nucleation activity of clay minerals such as kaolinite. We performed studies using X-ray diffraction and solid state NMR that investigate the changes that clay minerals undergo as a result of acid exposure. We are the first to show that the formation of a product on the surface of kaolinite was responsible for the decreased ice nucleation activity, not surface changes to the mineral itself. We continued to study aerosol-cloud interactions by using parcel models that explore the impact of ice growth surface kinetics on the competition between heterogeneous and homogeneous ice nucleation in clouds. We found that impaired growth of ice favors homogeneous freezing. The parcel models will be expanded to include our work on clay minerals to explore the impact of chemical aging of ice nuclei on overall cloud properties. We also studied the effect of acidic-processing on coal fly ash samples. Coal fly ash has been found to have a similar atmospheric impact as mineral dust, but is studied to a lesser extent. Like mineral dust, coal fly ash can serve as a source of bioavailable iron to phytoplankton in nutrient limited regions of the ocean. Fly ash has also been found to serve as an ice nucleating material. We performed aqueous sulfuric acid-treatment on fly ash samples representative of the types produced in the United States. We found that a soluble salt, gypsum (hydrated calcium sulfate), formed on three out of four samples. The most iron rich sample did not react with sulfuric acid. However, acidic-processing was shown to increase the amount of soluble iron which has implications for the biogeochemical cycle. These results also demonstrate that further work investigating these fly ash systems is warranted. In addition to our work on ice nucleation, we constructed a photoacoustic spectrometer to measure the absorbance of aerosol particles to study the optical properties of atmospheric aerosol. These measurements will aid in understanding the interactions of aerosol particles with light and the radiative balance of the planet.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 602

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Book Description
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.