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Author (up) Baddiley, C.
Title Light pollution colour changes at MHAONB, from distant town conversions to blue-rich LED lighting, implications for rural UK skies Type Journal Article
Year 2021 Publication Journal of Quantitative Spectroscopy and Radiative Transfer Abbreviated Journal Journal of Quantitative Spectroscopy and Radiative Transfer
Volume in press Issue Pages 107574
Keywords Skyglow
Abstract The sky in the Malvern Hills Area of Outstanding Natural Beauty (MHAONB) has been monitored continually since 2012, when a dark sky survey of the area was carried out commissioned by Malvern Hills Conservators. Ever since then at F.C.Mathon, the sky brightness has been measured continually, in the last few years at minute intervals in all weathers. On the darkest of nights, a fisheye lensed camera was used at the same intervals. There is a trend in brightness distribution and colour changes on the sky, especially towards the horizon, with clearly separated bright sky domes. The sky quality meter (SQM) photometry data near zenith does not show any great change. In 2015, Malvern Hills Conservators commissioned the author for modelling of the effect on the MHAONB sky, of the ongoing blue rich LED re-lighting throughout Herefordshire.

The SQM photometry shows the sky brightness are very weather dependent; and the camera shows colour changes from orange-pink to blue-rich LEDs. Besides the trend over recent years to blue white from orange, changes can occur over hours or even minutes, depending on cloud cover over individual towns on or beyond the horizon, and local humidity levels. It can vary from orange to blue and red. Clear skies can vary in overall colour from one night to another and brightness falls overnight. This is shown in isophotes and accurate profile curve fitting. The effect of 2020 lockdown is included. A measurement was made of the clear air back scatter ratio from a known luminance source which can be used to estimate the sky visibility degradation from any planned lighting scheme.

For the rural UK, the Milky Way is only 20% contrast to background at zenith on the darkest nights, (MHAONB 21.10 mag.arcsec-2), doubling the road light level across Europe would make it invisible.
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-4073 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3417
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Author (up) Baekelandt, S.; Milla, S.; Cornet, V.; Flamion, E.; Ledore, Y.; Redivo, B.; Antipine, S.; Mandiki, S.N.M.; Houndji, A.; El Kertaoui, N.; Kestemont, P.
Title Seasonal simulated photoperiods influence melatonin release and immune markers of pike perch Sander lucioperca Type Journal Article
Year 2020 Publication Scientific Reports Abbreviated Journal Sci Rep
Volume 10 Issue 1 Pages 2650
Keywords Animals
Abstract Melatonin is considered as the time-keeping hormone acting on important physiological functions of teleosts. While the influence of melatonin on reproduction and development is well described, its potential role on immune functions has little been considered. In order to better define an immune modulation by the melatonin hormone, we hypothesized that natural variations of photoperiod and subsequent changes in melatonin release profile may act on immune status of pikeperch. Therefore, we investigated during 70 days the effects of two photoperiod regimes simulating the fall and spring in western Europe, on pikeperch physiological and immune responses. Samples were collected at 04:00 and 15:00 at days 1, 37 and 70. Growth, plasma melatonin levels, innate immune markers and expression of immune-relevant genes in head kidney tissue were assessed. While growth and stress level were not affected by the seasonal simulated photoperiods, nocturnal levels of plasma melatonin were photoperiod-dependent. Innate immune markers, including lysozyme, complement, peroxidase and phagocytic activities, were stimulated by the fall-simulated photoperiod and a significant correlation was made with plasma melatonin. In addition to bring the first evidence of changes in fish immunocompetence related to photoperiod, our results provide an additional indication supporting the immunomodulatory action of melatonin in teleosts.
Address Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment, University of Namur, Rue de Bruxelles 61, Namur, B-5000, Belgium
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2045-2322 ISBN Medium
Area Expedition Conference
Notes PMID:32060347; PMCID:PMC7021833 Approved no
Call Number GFZ @ kyba @ Serial 2942
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Author (up) Baeza Moyano, D.; San Juan Fernández, M.; González Lezcano, R.A.
Title Towards a Sustainable Indoor Lighting Design: Effects of Artificial Light on the Emotional State of Adolescents in the Classroom Type Journal Article
Year 2020 Publication Sustainability Abbreviated Journal Sustainability
Volume 12 Issue 10 Pages 4263
Keywords Human Health; *Conservation of Natural Resources; visual comfort; artificial lighting; indoor lighting design; chronodisruption; circadian rhythms; daylighting; sustainable lighting design; LED luminaires; indoor environment quality; classroom lighting
Abstract In recent years, articles have been published on the non-visual effects of light, specifically the light emitted by the new luminaires with light emitting diodes (LEDs) and by the screens of televisions, computer equipment, and mobile phones. Professionals from the world of optometry have raised the possibility that the blue part of the visible light from sources that emit artificial light could have pernicious effects on the retina. The aim of this work is to analyze the articles published on this subject, and to use existing information to elucidate the spectral composition and irradiance of new LED luminaires for use in the home and in public spaces such as educational centers, as well as considering the consequences of the light emitted by laptops for teenagers. The results of this research show that the amount of blue light emitted by electronic equipment is lower than that emitted by modern luminaires and thousands of times less than solar irradiance. On the other hand, the latest research warns that these small amounts of light received at night can have pernicious non-visual effects on adolescents. The creation of new LED luminaires for interior lighting, including in educational centers, where the intensity of blue light can be increased without any specific legislation for its control, makes regulatory developments imperative due to the possible repercussions on adolescents with unknown and unpredictable consequences.
Address Department of Chemistry and Biochemistry, Universidad San Pablo CEU, Campus Montepríncipe, Boadilla del Monte, 28925 Madrid, Spain; baezams ( at ) ceu.es
Corporate Author Thesis
Publisher MDPI Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2071-1050 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 3381
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Author (up) Bagci, S.; Sabir, H.; Muller, A.; Reiter, R.J.
Title Effects of altered photoperiod due to COVID-19 lockdown on pregnant women and their fetuses Type Journal Article
Year 2020 Publication Chronobiology International Abbreviated Journal Chronobiol Int
Volume in press Issue Pages in press
Keywords Human Health; Covid-19; circadian disruption; fetus; lockdown; melatonin; pregnant Women
Abstract Maternal circadian rhythms provide highly important input into the entrainment and programming of fetal and newborn circadian rhythms. The light-dark cycle is an important regulator of the internal biological clock. Even though pregnant women spend a greater part of the day at home during the latter stages of pregnancy, natural light exposure is crucial for the fetus. The current recommended COVID-19 lockdown might dramatically alter normal environmental lighting conditions of pregnant women, resulting in exposure to extremely low levels of natural daylight and high-intensity artificial light sources during both day and night. This article summarizes the potential effects on pregnant woman and their fetuses due to prolonged exposure to altered photoperiod and as consequence altered circadian system, known as chronodisruption, that may result from the COVID-19 lockdown.
Address Department of Cell Systems and Anatomy, UT Health San Antonio , San Antonio, Texas, USA
Corporate Author Thesis
Publisher Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0742-0528 ISBN Medium
Area Expedition Conference
Notes PMID:32519912 Approved no
Call Number GFZ @ kyba @ Serial 3007
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Author (up) Bailey, F.; Sparks, C.P.; Seabrook, A.H.; Vignoles, W.A.; Trotter, A.P.; Gaster, L.; Cooper, W.R.; Shaw, C.M.; Morris, J.T.; Russell, C.N.; Edgcumbe, K.; Boot, H.L.P.; Dow, J.S.; Fedden, S.E.; Mackenzie, J.D.; Sexton, F.P.; Wilkinson, H.D.; Scott, E.K.; Hollis, E.P.; Pearce, S.L.; Frith, J.; Angus, H.W.; Cooper, A.G.; Moon, O.; Sells, F.; Crews, H.C.; Solomon, M.; Chattock, R.A.; Sumpner, W.E.; Augold, A.E.; Morcom, R.K.; Harrison, H.T.
Title Discussion on: “Street lighting by modern electric lamps” Type Journal Article
Year 1911 Publication Journal of the Institution of Electrical Engineers Abbreviated Journal
Volume 46 Issue 205 Pages 46-91
Keywords Lighting; Commentary
Abstract
Address
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 2054-0612 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2740
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