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Scanning Transmission X-ray Microscopy: Applications in Atmospheric Aerosol Research

Description: Scanning transmission x-ray microscopy (STXM) combines x-ray microscopy and near edge x-ray absorption fine structure spectroscopy (NEXAFS). This combination provides spatially resolved bonding and oxidation state information. While there are reviews relevant to STXM/NEXAFS applications in other environmental fields (and magnetic materials) this chapter focuses on atmospheric aerosols. It provides an introduction to this technique in a manner approachable to non-experts. It begins with relevant… more
Date: January 20, 2011
Creator: Moffet, Ryan C.; Tivanski, Alexei V. & Gilles, Mary K.
Partner: UNT Libraries Government Documents Department
open access

Measurement and modeling of shortwave irradiance components in cloud-free atmospheres

Description: Atmosphere scatters and absorbs incident solar radiation modifying its spectral content and decreasing its intensity at the surface. It is very useful to classify the earth-atmospheric solar radiation into several components--direct solar surface irradiance (E{sub direct}), diffuse-sky downward surface irradiance (E{sub diffuse}), total surface irradiance, and upwelling flux at the surface and at the top-of-the atmosphere. E{sub direct} depends only on the extinction properties of the atmospher… more
Date: August 4, 1999
Creator: Halthore, R. N.
Partner: UNT Libraries Government Documents Department
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