Determination of spectral irradiances from broadband instrument measurements

Susana B. Diaz; Donald W. Nelson; Guillermo Deferrari; Carolina Camilion

doi:10.1117/12.452919

17 January 2002 Determination of spectral irradiances from broadband instrument measurements

Susana B. Diaz, Donald W. Nelson, Guillermo Deferrari, Carolina Camilion

Proceedings Volume 4482, Ultraviolet Ground- and Space-based Measurements, Models, and Effects; (2002) https://doi.org/10.1117/12.452919
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

After the discovery of the ozone hole the use of spectral and multiband instruments in UV radiation measurements became more common, but time series for these instruments are still relatively short to determine trends. Nevertheless, systematic measurements of ozone column have been performed since late fifties at several stations and with worldwide coverage since late seventies, and long time series of broadband instruments (Pyranometers, UV and erythemally weighted) are also available at stations all over the world. In this paper we introduce a multi- regressive model that allows inference of spectral or narrowband irradiances from ozone total column and broadband irradiances, in places where a relatively short time series of spectral irradiances is available. To test the model, measurements under all weather, solar zenith angle and ground conditions performed at three of the stations of the NSAF UV Radiation Monitoring Network were used. The model generated very good results over a wide variety of situations. Broadband pyranometer data from the NOAA/CMDL surface radiation budget database for the South Pole Station were used in the model to estimate the daily-integrated narrowband irradiances. A time series of monthly means for the narrowband 303.030-307.692 nm were then computed, dating back to 1978.

Citation Download Citation

Susana B. Diaz, Donald W. Nelson, Guillermo Deferrari, and Carolina Camilion "Determination of spectral irradiances from broadband instrument measurements", Proc. SPIE 4482, Ultraviolet Ground- and Space-based Measurements, Models, and Effects, (17 January 2002); https://doi.org/10.1117/12.452919

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KEYWORDS

Ozone

Ultraviolet radiation

Clouds

Data modeling

Calibration

Atmospheric modeling

Biological research

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