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Incorporation of multiple cloud layers for ultraviolet radiation modeling studiesCloud data sets compiled from surface observations were used to develop an algorithm for incorporating multiple cloud layers into a multiple-scattering radiative transfer model. Aerosol extinction and ozone data sets were also incorporated to estimate the seasonally averaged ultraviolet (UV) flux reaching the surface of the Earth in the Detroit, Michigan, region for the years 1979-1991, corresponding to Total Ozone Mapping Spectrometer (TOMS) version 6 ozone observations. The calculated UV spectrum was convolved with an erythema action spectrum to estimate the effective biological exposure for erythema. Calculations show that decreasing the total column density of ozone by 1% leads to an increase in erythemal exposure by approximately 1.1-1.3%, in good agreement with previous studies. A comparison of the UV radiation budget at the surface between a single cloud layer method and a multiple cloud layer method presented here is discussed, along with limitations of each technique. With improved parameterization of cloud properties, and as knowledge of biological effects of UV exposure increase, inclusion of multiple cloud layers may be important in accurately determining the biologically effective UV budget at the surface of the Earth.
Document ID
19950036200
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Charache, Darryl H.
(Unviersity of Michigan, Ann Arbor, MI United States)
Abreu, Vincent J.
(Unviersity of Michigan, Ann Arbor, MI United States)
Kuhn, William R.
(Unviersity of Michigan, Ann Arbor, MI United States)
Skinner, Wilbert R.
(Unviersity of Michigan, Ann Arbor, MI United States)
Date Acquired
August 16, 2013
Publication Date
November 20, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: D11
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
95A67799
Funding Number(s)
CONTRACT_GRANT: NAS5-27751
Distribution Limits
Public
Copyright
Other

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