Comparison of GOME-2 UVA Satellite Data to Ground-Based UVA Measurements in South Africa
Article
Article Title | Comparison of GOME-2 UVA Satellite Data to Ground-Based UVA |
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ERA Journal ID | 15283 |
Article Category | Article |
Authors | du Preez, D. Jean (Author), Parisi, Alfio V. (Author), Millar, Danielle A. (Author), Bencherif, Hassan (Author) and Wright, Caradee Y. (Author) |
Journal Title | Photochemistry and Photobiology |
Journal Citation | 96 (6), pp. 1342-1349 |
Number of Pages | 8 |
Year | 2020 |
Publisher | John Wiley & Sons |
Place of Publication | United States |
ISSN | 0031-8655 |
1751-1097 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/php.13308 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1111/php.13308 |
Abstract | Satellite estimates of surface ultraviolet A (UVA) (315-400 nm) from the Global Ozone Monitoring Experiment (GOME)-2 were compared to ground-based measurements at four stations in South Africa over a four-year period (2015-2018). The comparison of daily exposure and daily maximum irradiance was completed for all-sky and clear-sky conditions. There is a strong linear correlation between the satellite and ground-based data with a correlation coefficient (r) between 0.85 and 0.96 for all sky conditions. However, at three of the stations the satellite data is under-estimated compared to ground-based data with a mean bias error (MBE) between -7.3% and -12.0%. Factors such as aerosols, surface albedo, altitude and data resolution may contribute to the under-estimations found at the three sites. These results indicate that satellite estimates of surface UVA over South Africa do not exhibit the same behaviour as other stations around the world and therefore require further validation. |
Keywords | UVA, GOME-2, satellite, South Africa |
ANZSRC Field of Research 2020 | 519999. Other physical sciences not elsewhere classified |
Byline Affiliations | University of Pretoria, South Africa |
Faculty of Health, Engineering and Sciences | |
South African Medical Research Council, South Africa | |
University of Reunion, France | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5zzz/comparison-of-gome-2-uva-satellite-data-to-ground-based-uva-measurements-in-south-africa
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