Comparisons of corrected daily-integrated erythermal UVR data from the U.S. EPA/UGA network of Brewer spectroradiometers with model and TOMS-inferred data

Sabburg, Jeff and Rives, J. E. and Meltzer, R. S. and Taylor, T. and Schmalzle, G. B. and Zheng, S. and Huang, N. and Wilson, A. and Udelhofen, P. M. (2002) Comparisons of corrected daily-integrated erythermal UVR data from the U.S. EPA/UGA network of Brewer spectroradiometers with model and TOMS-inferred data. Journal of Geophysical Research, 107. pp. 4676-4685. ISSN 0148-0227

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Abstract

A network of 21 Brewer spectroradiometers, owned by the U.S. Environmental Protection Agency (U.S. EPA) and operated by the University of Georgia (UGA), is measuring ultraviolet (UV) spectral irradiances throughout the United States. Corrections to the raw data for 4 of the 21 Brewers have now been implemented. These corrections include (1) the stray light rejection, (2) the cosine errors associated with the full sky diffuser, (3) the temperature dependence of the response of the instruments, and (4) the temporal variation in the instrument response due to changes in the optical characteristics of the instruments. While for many sites the total corrections amount to less than 10%, for certain sites they are much larger, in some cases amounting to more than 25%. It is estimated that application of these corrections brings the uncertainty of the absolute irradiance of individual spectral scans to approximately 6% for all known major sources of error for all solar zenith angles. A comparison is presented of corrected daily integrated erythemal UV doses on clear days to both model and Total Ozone Mapping Spectrometer (TOMS) UV values. The TOMS retrievals show a positive bias with respect to the measured values that falls in the range of 12.5–1.4% with an average value of 5% for the four sites studied.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 01:11
Last Modified: 02 Jul 2013 22:45
Uncontrolled Keywords: ultraviolet emissions; solar physics; solar irradiance
Fields of Research (FOR2008): 04 Earth Sciences > 0401 Atmospheric Sciences > 040199 Atmospheric Sciences not elsewhere classified
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020109 Space and Solar Physics
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: doi: 10.1029/2001JD001565
URI: http://eprints.usq.edu.au/id/eprint/2642

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