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Absorption and Scattering by Molecules and ParticlesThe Earth's atmosphere absorbs, scatters, and emits electromagnetic radiation. Although air molecules are the primary actors in these processes, aerosol particles are also present ubiquitously and modify the radiation field. In fact, this modification constitutes the very physical basis of aerosol remote sensing. Whenever clouds are present, they have a much larger influence on radiation which largely overshadows the aerosol impact. Therefore, in aerosol remote sensing, one often has to limit observations to cloudless conditions and screen cloudy pixels. In the solar part of the spectrum, molecular absorption is mostly limited to ultraviolet (UV; ozone) and near-infrared (near-IR; carbon dioxide, water vapor) wavelengths and is characterized by strong and narrow oxygen bands. A brief description of atmospheric molecular absorption is presented in Section 2.2. Shortwave aerosol remote sensing is usually performed outside the absorption bands, but some instruments also have channels capturing absorption bands with the objective of quantifying gaseous components.
Document ID
20150022918
Acquisition Source
Goddard Space Flight Center
Document Type
Book Chapter
Authors
Lenoble, Jacqueline
(Universite des Sciences et Techniques de Lille France)
Mishchenko, Michael I.
(NASA Goddard Inst. for Space Studies New York, NY United States)
Herman, Maurice
(Lille Univ. France)
Date Acquired
December 11, 2015
Publication Date
October 26, 2013
Publication Information
Publication: Aerosol Remote Sensing
Publisher: Springer
ISBN: 978-3-642-17724-8
e-ISBN: 978-3-642-17725-5
Subject Category
Earth Resources And Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN25382
Funding Number(s)
WBS: WBS 281945.02.03.03.27
Distribution Limits
Public
Copyright
Other
Keywords
remote sensing
aerosols
absorption spectra
molecular absorption

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