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Proceedings Paper

Model for approximating profiles of meteorological quantities and extinction, absorption and backscatter coefficients in very low stratus clouds and their associated subcloud regions
Author(s): Neal Harold Kilmer; Henry Rachele
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Paper Abstract

A model is presented for simulating very low stratus clouds and their associated subcloud regions. This model includes droplet growth, mass balance of total water, thermodynamics, similarity, and parcel ascent. The model requires only limited user input: some conventional meteorological values at a reference height (2 m above ground level) and some parameter values and other specifications. Input values for a visibility parameter and relative humidity are used to define the parameters of a bimodal lognormal dropsize distribution at the reference height. Drop size distributions are simulated and plotted for cases for which relative humidity at the reference height is 95 and 98 percent. Backscatter, absorption, and total extinction coefficients are calculated using Mie efficiency factors with simulated drop size distributions and plotted as functions of height for wavelengths of 0.55, 0.625, 1.06, 3.8, 4.0, and 10.6 micrometers.

Paper Details

Date Published: 1 September 1990
PDF: 12 pages
Proc. SPIE 1312, Propagation Engineering: Third in a Series, (1 September 1990); doi: 10.1117/12.21877
Show Author Affiliations
Neal Harold Kilmer, New Mexico State Univ. (United States)
Henry Rachele, U.S. Army Atmospheric Sciences Lab. (United States)

Published in SPIE Proceedings Vol. 1312:
Propagation Engineering: Third in a Series
Luc R. Bissonnette; Walter B. Miller, Editor(s)

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