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dc.contributor.authorBará Viñas, Salvador Xurxo
dc.date.accessioned2018-01-11T12:19:12Z
dc.date.available2018-01-11T12:19:12Z
dc.date.issued2016-10-19
dc.identifier.citationBará S. 2016 Anthropogenic disruption of the night sky darkness in urban and rural areas.R. Soc. open sci.3: 160541. http://dx.doi.org/10.1098/rsos.160541
dc.identifier.issn2054-5703
dc.identifier.urihttp://hdl.handle.net/10347/16303
dc.description.abstractThe growing emissions of artificial light to the atmosphere are producing, among other effects, a significant increase of the night sky brightness (NSB) above its expected natural values. A permanent sensor network has been deployed in Galicia (northwest of Iberian peninsula) to monitor the anthropogenic disruption of the night sky darkness in a countrywide area. The network is composed of 14 detectors integrated in automated weather stations of MeteoGalicia, the Galician public meteorological agency. Zenithal NSB readings are taken every minute and the results are openly available in real time for researchers, interested stakeholders and the public at large through a dedicated website. The measurements allow one to assess the extent of the loss of the natural night in urban, periurban, transition and dark rural sites, as well as its daily and monthly time courses. Two metrics are introduced here to characterize the disruption of the night darkness across the year: the significant magnitude (m1/3) and the moonlight modulation factor (γ ). The significant magnitude shows that in clear and moonless nights the zenithal night sky in the analysed urban settings is typically 14–23 times brighter than expected from a nominal natural dark sky. This factor lies in the range 7–8 in periurban sites, 1.6–2.5 in transition regions and 0.8–1.6 in rural and mountain dark sky places. The presence of clouds in urban areas strongly enhances the amount of scattered light, easily reaching amplification factors in excess of 25, in comparison with the light scattered in the same places under clear sky conditions. The periodic NSB modulation due to the Moon, still clearly visible in transition and rural places, is barely notable at periurban locations and is practically lost at urban sites
dc.description.sponsorshipThis work was partially funded by the Xunta de Galicia, Programa de Consolidación e Estruturación de Unidades de Investigación Competitivas, grant CN 2012/156, and was partly developed within the framework of the Spanish Network for Light Pollution Studies (Ministerio de Economía y Competitividad, AYA2015-71542-REDT
dc.language.isoeng
dc.publisherRoyal Society Open Science
dc.rights2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAstronomy
dc.subjectEnvironmental monitoring
dc.subjectWide-area sensing
dc.subjectLight pollution
dc.subjectAtmospheric effects
dc.subjectPhotometry
dc.titleAnthropogenic disruption of the night sky darkness in urban and rural areas
dc.typeinfo:eu-repo/semantics/article
dc.identifier.DOI10.1098/rsos.160541
dc.relation.publisherversionhttp://dx.doi.org/10.1098/rsos.160541
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.contributor.affiliationUniversidade de Santiago de Compostela. Departamento de Física Aplicada
dc.description.peerreviewedSI


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2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited
Except where otherwise noted, this item's license is described as  2016 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited





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