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Bará, S.; Espey, B.; Falchi, F.; Kyba, C.C.M.; Nievas, M., Pescatori, P., Ribas, S.J., Sánchez de Miguel, A.; Staubmann, P., Tapia Ayuga, C.; Wuchterl, G., Zamorano, J. |
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Title |
Report of the 2014 LoNNe Intercomparison Campaign |
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Report |
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2015 |
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32989 |
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Keywords |
skyglow |
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The 2014 LoNNe (Loss of the Night Network) intercomparison campaign is the second of four campaigns planned during EU COST Action ES1204. The goal of these campaigns is to understand systematic uncertainty inherent in observations of skyglow (light pollution). An innovation of this year’s campaign was to take measurements with many of the nstruments at two sites: an urban location and a location far from artificial lights. This report summarizes the meeting, and also provides three recommendations for obtaining and analyzing handheld SQM observations. |
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Universidad Complutense |
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Madrid |
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English |
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English |
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e-prints Complutense |
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LoNNe @ kyba @ |
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1254 |
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Kyba, C.C.M.; Bouroussis, C.; Canal-Domingo, R.; Falchi, F.; Giacomelli, A.; Hänel, A.; Kolláth, Z.; Massetti, L.; Ribas, S.J.; Spoelstra, H.; Tong, K.P.; Wuchterl, G. |
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Title |
Report of the 2015 LoNNe Intercomparison Campaign |
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Journal Article |
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2015 |
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skyglow; instrumentation |
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LoNNe @ kyba @; IDA @ john @; GFZ @ kyba @ |
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1255 |
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Brüning A., Hölker, F., Franke, S., Preuer, T., Kloas, W. |
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Title |
Impact of different colours of artificial light at night on melatonin rhythm and gene expression of gonadotropins in European perch |
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Journal Article |
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2016 |
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Science of The Total Environment |
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543 |
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214-222 |
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Animals |
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LoNNe @ schroer @ |
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1294 |
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Zamorano, J.; Sánchez de Miguel, A.; Ocaña, F.; Pila-Diez, B.; Gómez Castaño, J.; Pascual, S.; Tapia, C.; Gallego, J.; Fernandez, A.; Nievas, M. |
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Testing sky brightness models against radial dependency: a dense two dimensional survey around the city of Madrid, Spain |
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Journal Article |
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2016 |
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Journal of Quantitative Spectroscopy and Radiative Transfer |
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JQSRT |
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181 |
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52-66 |
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Keywords |
Skyglow; measurements; light pollution; artificial light at night; modeling; Madrid; Spain |
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We present a study of the night sky brightness around the extended metropolitan area of Madrid using Sky Quality Meter (SQM) photometers. The map is the first to cover the spatial distribution of the sky brightness in the center of the Iberian peninsula. These surveys are neccessary to test the light pollution models that predict night sky brightness as a function of the location and brightness of the sources of light pollution and the scattering of light in the atmosphere. We describe the data-retrieval methodology, which includes an automated procedure to measure from a moving vehicle in order to speed up the data collection, providing a denser and wider survey than previous works with similar time frames. We compare the night sky brightness map to the nocturnal radiance measured from space by the DMSP satellite. We find that i) a single source model is not enough to explain the radial evolution of the night sky brightness, despite the predominance of Madrid in size and population, and ii) that the orography of the region should be taken into account when deriving geo-specific models from general first-principles models. We show the tight relationship between these two luminance measures. This finding sets up an alternative roadmap to extended studies over the globe that will not require the local deployment of photometers or trained personnel. |
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Dept. Astrof´ısica y CC. de la Atm´osfera, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain |
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IDA @ john @ |
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1323 |
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Le Tallec, T.; Théry, M.; Perret, M. |
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Melatonin concentrations and timing of seasonal reproduction in male mouse lemurs (Microcebus murinus) exposed to light pollution |
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Journal Article |
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Year |
2016 |
Publication |
Journal of Mammalogy |
Abbreviated Journal |
J of Mammalogy |
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97 |
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3 |
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753-760 |
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Animals; light pollution; photobiology; core temperature; locomotor activity; melatonin; Microcebus murinus; primate; testosterone; lemurs; mouse lemur |
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Adverse effects of light at night are associated with human health problems and with changes in seasonal reproduction in several species. Owing to its role in the circadian timing system, melatonin production is suspected to mediate excess nocturnal light. To test this hypothesis, we examined the effect of light pollution on the timing of seasonal reproduction on a strict Malagasy long-day breeder, the nocturnal mouse lemur (Microcebus murinus). We randomly exposed 12 males in wintering sexual rest to moonlight or to a light-mimicking nocturnal streetlight for 5 weeks. We monitored urinary 6-sulfatoxymelatonin concentrations (aMT6s), plasma testosterone concentrations, and testis size, and we recorded daily rhythms of core temperature and locomotor activity. In males exposed to light pollution, we observed a significant decrease in urinary aMT6s concentrations associated with changes in daily rhythm profiles and with activation of reproductive function. These results showed that males entered spontaneous sexual recrudescence leading to a summer acclimatization state, which suggests that light at night disrupts perception of day length cues, leading to an inappropriate photoentrainment of seasonal rhythms. |
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UMR 7179 Centre National de la Recherche Scientifique, Muséum National d’Histoire Naturelle , 1 avenue du petit château, 91800 Brunoy, France; thery(at)mnhn.fr |
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Oxford University Press |
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English |
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IDA @ john @ |
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1348 |
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