Aerosol Optics

Aerosol Optics
Author :
Publisher : Springer Science & Business Media
Total Pages : 154
Release :
ISBN-10 : 9783540499091
ISBN-13 : 3540499091
Rating : 4/5 (91 Downloads)

Synopsis Aerosol Optics by : Alexander A. Kokhanovsky

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.

Models for the Aerosols of the Lower Atmosphere and the Effects of Humidity Variations on Their Optical Properties

Models for the Aerosols of the Lower Atmosphere and the Effects of Humidity Variations on Their Optical Properties
Author :
Publisher :
Total Pages : 100
Release :
ISBN-10 : UOM:39015095139237
ISBN-13 :
Rating : 4/5 (37 Downloads)

Synopsis Models for the Aerosols of the Lower Atmosphere and the Effects of Humidity Variations on Their Optical Properties by : Eric P. Shettle

Aerosol models have been developed for the lower atmosphere. These models are representative of conditions found in rural, urban, and maritime air masses. The changes in the aerosol properties with variations in the relative humidity are discussed. To describe the aerosol optical properties in the extreme of 100 percent relative humidity, several fog models are presented. For each model the coefficients for extinction, scattering, and absorption, the angular scattering distribution, and other optical parameters have been computed for wavelengths between 0.2 and 40 microns. These aerosol models are presented together with a review of their experimental basis. The optical properties of these models are discussed and some comparisons of the model with experimental measurements are presented.

Ground-Based Aerosol Optical Depth Measurement Using Sunphotometers

Ground-Based Aerosol Optical Depth Measurement Using Sunphotometers
Author :
Publisher : Springer
Total Pages : 67
Release :
ISBN-10 : 9789812871015
ISBN-13 : 9812871012
Rating : 4/5 (15 Downloads)

Synopsis Ground-Based Aerosol Optical Depth Measurement Using Sunphotometers by : Jedol Dayou

This book gives a detailed review on ground-based aerosol optical depth measurement with emphasis on the calibration issue. The review is written in chronological sequence to render better comprehension on the evolution of the classical Langley calibration from the past to present. It not only compiles the existing calibration methods but also presents a novel calibration algorithm in Langley sun-photometry over low altitude sites which conventionally is a common practice performed at high observatory stations. The proposed algorithm avoids travelling to high altitudes for frequent calibration that is difficult both in logistics and financial prospects. We addressed the problem by combining clear-sky detection model and statistical filter to strictly imitate the ideal clear-sky condition at high altitude for measurements taken over low altitudes. In this way, the possible temporal atmospheric drifts, abundant aerosol loadings and short time interval cloud transits are properly constrained. We believe that this finding has an integral part of practicality and versatility in ground-based aerosol optical depth measurement, which is nowadays an important climate agent in many atmospheric studies. Finally, the outcome of this book introduces a new calibration technique for the study and measurement of aerosol monitoring with emphasis on aerosol optical depth that we believe could be very beneficial to researchers and scientists in the similar area.

Atmospheric Optics Measurements with a Balloon-borne Nephelometer

Atmospheric Optics Measurements with a Balloon-borne Nephelometer
Author :
Publisher :
Total Pages : 38
Release :
ISBN-10 : UOM:39015095137025
ISBN-13 :
Rating : 4/5 (25 Downloads)

Synopsis Atmospheric Optics Measurements with a Balloon-borne Nephelometer by : Frank W. Gibson

A large modified polar nephelometer was constructed for the purpose of making high altitude atmospheric optics measurements. The instrument is balloon-borne and measures the angular volume scattering function from ground to better than 26 km in absolute quantities. The results of the initial flight with the unit are presented and they depict the variability in this parameter over the altitude profile for three scattering angles and four wavelengths. In addition, the polarization and the forward-to-backscatter ratio of the scattered light are shown to be sensitive indicators of the atmosphere's vertical aerosol structure. The import of these preliminary results is, however, in pointing out the capabilities of this instrument, which can provide quantitative information on fundamental optical parameters of the atmosphere without the constraints inherent in other techniques.

The Airborne Microparticle

The Airborne Microparticle
Author :
Publisher : Springer Science & Business Media
Total Pages : 841
Release :
ISBN-10 : 9783642561528
ISBN-13 : 3642561527
Rating : 4/5 (28 Downloads)

Synopsis The Airborne Microparticle by : E. James Davis

It has been thirty years since one of the authors (EJD) began a collaboration with Professor Milton Kerker at Clarkson University in Potsdam, New York using light scattering methods to study aerosol processes. The development of a relatively short-lived commercial particle levitator based on a modification of the Millikan oil drop experiment attracted their attention and led the author to the study of single droplets and solid microparticles by levitation methods. The early work on measurements of droplet evaporation rates using light scattering techniques to determine the size slowly expanded and diversified as better instrumentation was developed, and faster computers made it possible to perform Mie theory light scattering calculations with ease. Several milestones can be identified in the progress of single microparticle studies. The first is the introduction of the electrodynamic balance, which provided more robust trapping of a particle. The electrodynamic levitator, which has played an important role in atomic and molecular ion spectroscopy, leading to the Nobel Prize in Physics in 1989 shared by Wolfgang Paul of Bonn University and Hans Dehmelt of the University of Washington, was easily adapted to trap microparticles. Simultaneously, improvements in detectors for acquiring and storing light scattering data and theoretical and experimental studies of the interesting optical properties of microspheres, especially the work on morphology dependent resonances by Arthur Ashkin at the Bell Laboratories, Richard Chang, from Yale University, and Tony Campillo from the Naval Research Laboratories in Washington D. C.

Atmospheric Aerosol Properties

Atmospheric Aerosol Properties
Author :
Publisher : Springer Science & Business Media
Total Pages : 595
Release :
ISBN-10 : 9783540376989
ISBN-13 : 3540376984
Rating : 4/5 (89 Downloads)

Synopsis Atmospheric Aerosol Properties by : Kirill Ya. Kondratyev

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.

Aerosols

Aerosols
Author :
Publisher : Stefan University Press
Total Pages : 177
Release :
ISBN-10 : 9781889545264
ISBN-13 : 1889545260
Rating : 4/5 (64 Downloads)

Synopsis Aerosols by : V. Alexander STEFAN, Editor

Light Scattering Media Optics

Light Scattering Media Optics
Author :
Publisher : Springer Science & Business Media
Total Pages : 332
Release :
ISBN-10 : 3540211845
ISBN-13 : 9783540211846
Rating : 4/5 (45 Downloads)

Synopsis Light Scattering Media Optics by : Alex A. Kokhanovsky

The theory of the scattering of light by small particles is very important in a wide range of applications in atmospheric physics and atmospheric optics, ocean optics, remote sensing, astronomy and astrophysics and biological optics. This book summarises current knowledge of the optical properties of single small particles and natural light scattering media such as snow, clouds, foam aerosols etc. The book considers both single and multiple light scattering regimes, together with light scattering and radiative transfer in close-packed media. The third edition incorporates new findings in the area of light scattering media optics in an updated version of the text.