Variation of outdoor illumination as a function of solar elevation and light pollution
The illumination of the environment undergoes both intensity and spectral changes during the 24 h cycle of a day. Daylight spectral power distributions are well described by low-dimensional models such as the CIE (Commission Internationale de l'Éclairage) daylight model, but the performance of...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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Nature Research
2016
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| _version_ | 1826266742477815808 |
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| author | Spitschan, M Aguirre, G Brainard, D Sweeney, A |
| author_facet | Spitschan, M Aguirre, G Brainard, D Sweeney, A |
| author_sort | Spitschan, M |
| collection | OXFORD |
| description | The illumination of the environment undergoes both intensity and spectral changes during the 24 h cycle of a day. Daylight spectral power distributions are well described by low-dimensional models such as the CIE (Commission Internationale de l'Éclairage) daylight model, but the performance of this model in non-daylight regimes is not characterised. We measured downwelling spectral irradiance across multiple days in two locations in North America: One rural location (Cherry Springs State Park, PA) with minimal anthropogenic light sources, and one city location (Philadelphia, PA). We characterise the spectral, intensity and colour changes and extend the existing CIE model for daylight to capture twilight components and the spectrum of the night sky. |
| first_indexed | 2024-03-06T20:43:35Z |
| format | Journal article |
| id | oxford-uuid:3515a580-803b-4421-b4b2-b6a773832acd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:43:35Z |
| publishDate | 2016 |
| publisher | Nature Research |
| record_format | dspace |
| spelling | oxford-uuid:3515a580-803b-4421-b4b2-b6a773832acd2022-03-26T13:30:00ZVariation of outdoor illumination as a function of solar elevation and light pollutionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3515a580-803b-4421-b4b2-b6a773832acdEnglishSymplectic Elements at OxfordNature Research2016Spitschan, MAguirre, GBrainard, DSweeney, AThe illumination of the environment undergoes both intensity and spectral changes during the 24 h cycle of a day. Daylight spectral power distributions are well described by low-dimensional models such as the CIE (Commission Internationale de l'Éclairage) daylight model, but the performance of this model in non-daylight regimes is not characterised. We measured downwelling spectral irradiance across multiple days in two locations in North America: One rural location (Cherry Springs State Park, PA) with minimal anthropogenic light sources, and one city location (Philadelphia, PA). We characterise the spectral, intensity and colour changes and extend the existing CIE model for daylight to capture twilight components and the spectrum of the night sky. |
| spellingShingle | Spitschan, M Aguirre, G Brainard, D Sweeney, A Variation of outdoor illumination as a function of solar elevation and light pollution |
| title | Variation of outdoor illumination as a function of solar elevation and light pollution |
| title_full | Variation of outdoor illumination as a function of solar elevation and light pollution |
| title_fullStr | Variation of outdoor illumination as a function of solar elevation and light pollution |
| title_full_unstemmed | Variation of outdoor illumination as a function of solar elevation and light pollution |
| title_short | Variation of outdoor illumination as a function of solar elevation and light pollution |
| title_sort | variation of outdoor illumination as a function of solar elevation and light pollution |
| work_keys_str_mv | AT spitschanm variationofoutdoorilluminationasafunctionofsolarelevationandlightpollution AT aguirreg variationofoutdoorilluminationasafunctionofsolarelevationandlightpollution AT brainardd variationofoutdoorilluminationasafunctionofsolarelevationandlightpollution AT sweeneya variationofoutdoorilluminationasafunctionofsolarelevationandlightpollution |