Editorial Type:
Article
Article Type:
Research Article

Reflectivity and Attenuation at Millimeter to Infrared Wavelengths for Advection Fogs at Four Locations

David A. de Wolf Bradley Department of Electrical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia

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Christos Kontogeorgakis Bradley Department of Electrical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia

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Robert E. Marshall Department of Civil Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia

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Print Publication:
01 Jan 1999
DOI:
https://doi.org/10.1175/1520-0450(1999)038<0126:RAAAMT>2.0.CO;2
Page(s):
126–131
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Abstract

Recent drop size distribution data from four advection fog sites are reanalyzed for the purpose of predicting millimeter-wave and infrared to visible wavelength reflectivity and attenuation coefficients in such fogs. A gamma drop size distribution model is shown to be an adequate fit to measured distributions of typical fog drop diameters. Conclusions are drawn with respect to the relationships between the reflectivity and the attenuation to the liquid water content. A possible method is outlined for using ground-based measurement of liquid water content for the purpose of predicting arbitrary slant-path reflectivity and attenuation at the smaller wavelengths.

Corresponding author address: David A. de Wolf, Bradley Department of Electrical Engineering, 340 Whittemore Hall, Virginia Tech, Blacksburg, VA 24061-0111.

Abstract

Recent drop size distribution data from four advection fog sites are reanalyzed for the purpose of predicting millimeter-wave and infrared to visible wavelength reflectivity and attenuation coefficients in such fogs. A gamma drop size distribution model is shown to be an adequate fit to measured distributions of typical fog drop diameters. Conclusions are drawn with respect to the relationships between the reflectivity and the attenuation to the liquid water content. A possible method is outlined for using ground-based measurement of liquid water content for the purpose of predicting arbitrary slant-path reflectivity and attenuation at the smaller wavelengths.

Corresponding author address: David A. de Wolf, Bradley Department of Electrical Engineering, 340 Whittemore Hall, Virginia Tech, Blacksburg, VA 24061-0111.

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Cover Journal of Applied Meteorology and Climatology
Journal of Applied Meteorology and Climatology

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