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Issue 3, 2019
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Updated and validated solar irradiance reference spectra for estimating environmental photodegradation rates

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Abstract

Irradiance reference spectra are used to calculate environmentally relevant photodegradation half-lives, but the currently used spectra were originally published in the 1980s with limited validation. The goal of this work is to provide updated irradiance reference spectra using the Simple Model of the Atmospheric Radiative Transfer of Sunshine (SMARTS). The SMARTS irradiance spectra were validated against measurements from several high-resolution spectroradiometers, and the updated irradiance reference spectra use current measurements for atmospheric species that can affect the irradiance that reaches the Earth's surface. These updated irradiance spectra are provided in 1 nm increments from 280 to 800 nm for 0° to 70° latitude at 10° increments in both the northern and southern hemisphere. Lastly, the influence of the input parameters on the modeled irradiance spectra was investigated. This work will allow users to calculate more accurate photodegradation half-lives using the updated irradiance reference spectra, and it also provides insight for users to calculate their own location- and time-specific irradiance spectra using SMARTS.

Graphical abstract: Updated and validated solar irradiance reference spectra for estimating environmental photodegradation rates

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Publication details

The article was received on 18 Oct 2018, accepted on 07 Dec 2018 and first published on 04 Feb 2019


Article type: Paper
DOI: 10.1039/C8EM00478A
Environ. Sci.: Processes Impacts, 2019,21, 427-437
  • Open access: Creative Commons BY license
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    Updated and validated solar irradiance reference spectra for estimating environmental photodegradation rates

    Jennifer N. Apell and K. McNeill, Environ. Sci.: Processes Impacts, 2019, 21, 427
    DOI: 10.1039/C8EM00478A

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