Physics of the Aurora and Airglow

Physics of the Aurora and Airglow PDF

Author: Joseph W. Chamberlain

Publisher: Elsevier

Published: 2016-06-03

Total Pages: 723

ISBN-13: 1483222535

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International Geophysics Series, Volume 2: Physics of the Aurora and Airglow explores certain physical aspects of aurora and airglow. This volume is composed of 13 chapters and begins with surveys of the theory and spectroscopic and photometric analyses of radiation from the upper atmosphere. The subsequent chapters treat the geographic distribution of aurora and its physical processes in the atmosphere. Other chapters examine the theory of hydrogen emission in aurora, resonance scattering by atmospheric sodium, the excitation of the oxygen red lines in the airglow, and an atlas of the auroral spectrum. A chapter focuses on the analysis of twilight observations for emission heights. The concluding chapters discuss the theory of day airglow, as well as the spectral photometry and excitation of the nightglow. This book is of value to geophysicists, theoreticians, and scientists of the allied fields of geophysics.

The Optical Aurora

The Optical Aurora PDF

Author: A. Omholt

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 212

ISBN-13: 3642462693

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The aim of this book is to describe and discuss the aurora as an optical phenomenon, one which can be observed by the naked eye as well as with more sensitive optical detectors. It continues the tradition of study ing that impressive and imaginative play of nature, the northern lights, seen and discussed by the Greek philosphers as early as the sixth century B.c. Today the study of the optical aurora is only one of many ways of acquiring information about a major phenomenon: the ejection of plasma from the sun, the interaction of this plasma with the geomagnetic field and the injection of fast particles into the earth's atmosphere. of the optical aurora is justified by the Hence, the separate treatment particular scientific approach: detection and interpretation of electro magnetic radiation, approximately in the 1000-100000 A region, produc ed through interaction between the auroral particles and the earth's atmosphere. Other techniques, such as radio observations, X-ray observations, direct particle detections from rockets and satellites, studies of magnetic storms, and measurements of the magnetic field and plasma properties in the magnetosphere, are as important or more important than the classical way of studying the optical aurora. Nevertheless, it was felt worthwhile to treat the optical aurora in a separate book, perhaps mainly because today one author cannot master the whole subject with sufficient competence. This book is thus one volume in a series of books giving a more complete picture of physics and chemistry in space.

BASIC RESEARCH ON AURORA AND AIRGLOW.

BASIC RESEARCH ON AURORA AND AIRGLOW. PDF

Author:

Publisher:

Published: 1963

Total Pages: 57

ISBN-13:

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The principal instruments and facilities are described with special emphasis on new construction or modifications. This equipment includes two high dispersion grating spectrographs, two types of patrol spectrographs, ground- based, aircraft borne and balloon-borne infrared spectrometers, a scanning spectrometer for the visible and ultra violet regions with memory unit, two types of photometer for the study of twilight alkali emissions, a Michelson interferometer for the near infrared region and a temperature-measuring photometer for the measuring of auroral rotational temperatures. Also described are facilities for producing specialized interference filters, a source for the Vegard-Kaplan bands, intensity standards for absolute brightness measurements of aurora and a system for obtaining all-sky photographs through interference filters. There is also a brief description of two rocket borne photometers which are under development. Twilight airglow and dayglow measurements, observations of auroral emissions, of the night airglow and of auroral temperatures are discussed. A study is described of the possibility of measuring atmospheric temperatures using the vibrational ratios of N(2) bands. New quantitative measurements of the Vegard-Kaplan bands in the second positive bands of N(2) with the photo electric scanning spectrometer and memory are described.

Auroral Physics

Auroral Physics PDF

Author: David J. Knudsen

Publisher: Springer

Published: 2021-08-27

Total Pages: 409

ISBN-13: 9789402421217

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This volume surveys our current scientific understanding of the terrestrial aurora. It is organized into eleven reviews detailing theoretical and observational aspects of characteristic auroral morphologies, and how these in turn are organized according to local time, latitude, and activity level. Popular descriptions often attribute the aurora to the interaction of charged particles from the solar wind with atoms in the upper atmosphere. In fact, most auroras are not the result of direct entry of solar wind particles. Rather, as detailed in this volume, auroral particle acceleration and generation of auroral forms occur primarily within the magnetosphere. Importantly, many key aspects of the aurora – most notably, the physical mechanisms responsible for the generation of discrete arcs – are still unexplained, and auroral physics continues to be an active area of scientific research. Each review chapter therefore includes a summary of open questions for further investigation. Providing the first comprehensive review of the terrestrial aurora in two decades, this book will aid both active researchers and newcomers interested in understanding the current state of the field. Previously published Space Science Reviews in the Topical Collection "Auroral Physics”

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