Título:
Validation of an Erythema-weighted UV model using broadband solar irradiance measurements from eleven U.S. sites
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Autor:
Laguarda, Agustín
Habte, Aaron
Abal, Gonzalo
Sengupta, Managit
Habte, Aaron
Abal, Gonzalo
Sengupta, Managit
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Tipo de documento:
Preprint
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Palabras clave:
Solar modeling
UV irradiance
Empirical model
Erythema-weighted UV
Quality assessment
UV irradiance
Empirical model
Erythema-weighted UV
Quality assessment
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Año de publicación:
2025
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Resumen:
Erythema-weighted UV solar irradiance (UV-E) has a potential impact on human health if the recommended maximum exposure times are exceeded. In spite of this, it is not measured at most sites that measure Global Horizontal Irradiance (GHI). However, since UV-E is highly correlated with GHI and total ozone content it can be estimated from this information with sufficient accuracy to assisst in public health recommendations. The Power Model (PM) provides a simple method to estimate the erythema-weighted UV irradiance (UV-E) from
measured GHI, total ozone column and air mass. In this work, the performance of the PM method is assessed using high-quality data from 11 sites in the continental U.S. (part of SURFRAD and SOLRAD networks) and total ozone estimates publicly available from the MERRA-2 re-analysis database. A three year period (2021-2023) at 1-minute frequency is considered. The results (for time aggregations of 5 and 60 minutes) show a high Pearson's correlations (> 0.99), consistently positive mean bias deviations (below 13%) and dispersions in the 8-19% range at all sites. Relative values are expressed in terms of the corresponding measurement mean. The performance indicators remain consistent across time resolutions (5 or 60 minutes), suggesting that the model's performance is robust and not significantly affected by short-term variability (which is captured by GHI). Spatial patterns reveal higher biases and RMSD in northern and eastern locations. These values represent a significant improvement over widely used satellite-based global UV-E estimates and open the possibility of using the PM with satellite-based GHI estimates for operational UV-E mapping over the contiguous U.S. territory.
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Laguarda, A., Habte, A., Abal, G. y otros. Validation of an Erythema-weighted UV model using broadband solar irradiance measurements from eleven U.S. sites [Preprint] Publicado en : ISES Solar World Congress 2025 (SWC2025) Proceedings. International Solar Energy Society. Nov. 3 - 7, 2025, Fortaleza, Brazil. doi://10.18086/swc.2025.04.50.
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Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)
Attribution-NonCommercial-NoDerivatives 4.0 International
Attribution-NonCommercial-NoDerivatives 4.0 International
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| Ficheros | Descripción | Tamaño | Formato | ||
|---|---|---|---|---|---|
| LHAS25.pdf | Preprint | 783.04 KB | Adobe PDF |
Licencia Creative Commons:
Excepto donde se indique lo contrario, la licencia de este ítem se describe como Licencia Creative Commons Atribución - No Comercial - Sin Derivadas (CC - By-NC-ND 4.0)