dc.creatorAntón, M.
dc.creatorPiedehierro, A. A.
dc.creatorAlados Arboledas, L.
dc.creatorWolfram, Elian Augusto
dc.creatorOlmo, F. J.
dc.date.accessioned2019-08-20T19:11:34Z
dc.date.accessioned2022-10-15T07:26:39Z
dc.date.available2019-08-20T19:11:34Z
dc.date.available2022-10-15T07:26:39Z
dc.date.created2019-08-20T19:11:34Z
dc.date.issued2012-11
dc.identifierAntón, M.; Piedehierro, A. A.; Alados Arboledas, L.; Wolfram, Elian Augusto; Olmo, F. J.; Extreme ultraviolet index due to broken clouds at a midlatitude site, Granada (southeastern Spain); Elsevier Science Inc; Atmospheric Research; 118; 11-2012; 10-14
dc.identifier0169-8095
dc.identifierhttp://hdl.handle.net/11336/81844
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4360275
dc.description.abstractCloud cover usually attenuates the ultraviolet (UV) solar radiation but, under certain sky conditions, the clouds may produce an enhancement effect increasing the UV levels at surface. The main objective of this paper is to analyze an extreme UV enhancement episode recorded on 16 June 2009 at Granada (southeastern Spain). This phenomenon was characterized by a quick and intense increase in surface UV radiation under broken cloud fields (5-7oktas) in which the Sun was surrounded by cumulus clouds (confirmed with sky images). Thus, the UV index (UVI) showed an enhancement of a factor 4 in the course of only 30min around midday, varying from 2.6 to 10.4 (higher than the corresponding clear-sky UVI value). Additionally, the UVI presented values higher than 10 (extreme erythemal risk) for about 20min running, with a maximum value around 11.5. The use of an empirical model and the total ozone column (TOC) derived from the Global Ozone Monitoring Experiment (GOME) for the period 1995-2011 showed that the value of UVI~11.5 is substantially larger than the highest index that could origin the natural TOC variations over Granada. Finally, the UV erythemal dose accumulated during the period of 20min with the extreme UVI values under broken cloud fields was 350J/m 2 which surpass the energy required to produce sunburn of the most human skin types.
dc.languageeng
dc.publisherElsevier Science Inc
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.atmosres.2012.06.007
dc.relationinfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0169809512001822
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectCLOUD ENHANCEMENT
dc.subjectULTRAVIOLET ERYTHEMAL IRRADIANCE
dc.subjectUV INDEX
dc.titleExtreme ultraviolet index due to broken clouds at a midlatitude site, Granada (southeastern Spain)
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


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