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Author Masana, E.; Carrasco, J.M.; Bará, S.; Ribas, S.J.
Title A multiband map of the natural night sky brightness including Gaia and Hipparcos integrated starlight Type Journal Article
Year (down) 2021 Publication Monthly Notices of the Royal Astronomical Society Abbreviated Journal
Volume 501 Issue 4 Pages 5443-5456
Keywords Instrumentation; night sky brightness; radiative transfer; scattering; atmospheric effects; photometers; light pollution; site testing
Abstract The natural night sky brightness is a relevant input for monitoring the light pollution evolution at observatory sites, by subtracting it from the overall sky brightness determined by direct measurements. It is also instrumental for assessing the expected darkness of the pristine night skies. The natural brightness of the night sky is determined by the sum of the spectral radiances coming from astrophysical sources, including zodiacal light, and the atmospheric airglow. The resulting radiance is modified by absorption and scattering before it reaches the observer. Therefore, the natural night sky brightness is a function of the location, time, and atmospheric conditions. We present in this work the GAia Map of the Brightness Of the Natural Sky (GAMBONS), a model to map the natural night brightness of the sky in cloudless and moonless nights. Unlike previous maps, GAMBONS is based on the extra-atmospheric star radiance obtained from the Gaia catalogue. The Gaia-Data Release 2 (DR2) archive compiles astrometric and photometric information for more than 1.6 billion stars up to G = 21 mag. For the brightest stars, not included in Gaia-DR2, we have used the Hipparcos catalogue instead. After adding up to the star radiance the contributions of the diffuse galactic and extragalactic light, zodiacal light and airglow, and taking into account the effects of atmospheric attenuation and scattering, the radiance detected by ground-based observers can be estimated. This methodology can be applied to any photometric band, if appropriate transformations from the Gaia bands are available. In particular, we present the expected sky brightness for V (Johnson), and visual photopic and scotopic passbands.
Address Departament Física Quàntica i Astrofìsica, Institut de Ciències del Cosmos (ICC-UB-IEEC), C Martí Franquès 1, E-08028 Barcelona, Spain; emasana ( at ) fqa.ub.edu
Corporate Author Thesis
Publisher Oxford Academic Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0035-8711 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 3299
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Author Argys, L.M.; Averett, S.L.; Yang, M.
Title Light pollution, sleep deprivation, and infant health at birth Type Journal Article
Year (down) 2021 Publication Southern Economic Journal Abbreviated Journal South Econ J
Volume 87 Issue 3 Pages 849-888
Keywords Human Health; birth outcomes; light pollution; skyglow; sleep deprivation
Abstract We conduct the first study to examine the fetal health impact of light pollution based on a direct measure of skyglow, an important aspect of light pollution. Using an empirical regularity discovered in physics (called Walker's law) as an instrumental variable, we address the potential endogeneity problem associated with the skyglow variable. We find evidence of reduced birth weight, shortened gestational length, and increases in preterm births. Specifically, increased nighttime brightness, characterized by being able to see only one‐fourth to one‐third of the stars that are visible in the natural unpolluted night sky, is associated with an increase of 1.48 percentage points in the likelihood of a preterm birth. Our study adds to the literature on the impact of early‐life exposure to pollution, which so far has focused primarily on air pollution. Our study has important policy implications regarding the necessity of minimizing skyglow that is, for example, contributed by streetlights.
Address Department of Economics, Lehigh University, 621 Taylor Street, Bethlehem, PA 18015 USA; muzheyang ( at ) lehigh.edu
Corporate Author Thesis
Publisher Wiley Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0038-4038 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 3300
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Author Simoneau, A.; Aubé, M.; Leblanc, J.; Boucher, R.; Roby, J.; Lacharité, F.
Title PSFs for mapping artificial night sky luminance over large territories Type Journal Article
Year (down) 2021 Publication Monthly Notices of the Royal Astronomical Society Abbreviated Journal MNRAS
Volume in press Issue Pages
Keywords Skyglow; light pollution; simulations; atmospheric effects; radiative transfer; numerical methods; site testing
Abstract Knowledge of the night sky radiance over a large territory may be valuable information to identify sites appropriate to astronomical observations or for asserting the impacts of artificial light at night on ecosystems. Measuring the sky radiance can be a complex endeavour depending on the desired temporal and spatial resolution. Similarly, modelling of artificial night sky radiance for multiple points of a territory can represent a significant amount of computing time depending on the complexity of the model used. We suggest performing modelling of

the sky radiance over large territories using the convolution of a transfer function determined with the radiative transfer model Illumina v2. The transfer functions are used as Point Spread Functions of single light sources over a complex light source geographical distributions. The main contributions of our work are to determine how the Point Spread Function is sensitive to the main driving parameters of the artificial night sky radiance such as the wavelength, the ground reflectance, the obstacles properties, the Upward Light Output Ratio and the Aerosol Optical Depth. The method is applied to the territory of the Mont-Mégantic International Dark Sky Reserve in Canada. We repeated the experiment for winter and summer conditions and compared the maps to the New world atlas of artificial night sky brightness, to different setup of the Illumina v2 model and to in situ Sky Quality Camera measurements. The typical errors associated with the method were evaluated.
Address Département de géomatique appliquée, Université de Sherbrooke, 2500 Boul. de l’Université, Sherbrooke, J1K 2R1, Canada; martin.aube ( at ) cegepsherbrooke.qc.ca
Corporate Author Thesis
Publisher Royal Astronomical Society Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ john @ Serial 3301
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Author Vowles, A.S.; Kemp, P.S.
Title Artificial light at night (ALAN) affects the downstream movement behaviour of the critically endangered European eel, Anguilla anguilla Type Journal Article
Year (down) 2021 Publication Environmental Pollution Abbreviated Journal Environmental Pollution
Volume in press Issue Pages
Keywords Animals
Abstract Artificial light at night (ALAN) is considered one of the most pervasive forms of environmental pollution. It is an emerging threat to freshwater biodiversity and can influence ecologically important behaviours of fish. The European eel (Anguilla anguilla) is a critically endangered catadromous species that migrates downstream to the ocean to spawn in the Sargasso Sea. Given the pervasive nature of ALAN, many eel will navigate through artificially lit routes during their seaward migration, and although considered negatively phototactic, their response has yet to be quantified. We investigated the response of downstream moving European eel to simulated ALAN using a Light Emitting Diode unit in an experimental flume. We presented two routes of passage under: (1) a dark control (both channels unlit), (2) low ALAN (treatment channel lit to ca. 5 lx), or (3) high ALAN (treatment channel lit to ca. 20 lx). Eel were: (i) more likely to reject an illuminated route when exposed to high levels of ALAN; (ii) less likely to select the illuminated channel when given a choice; and (iii) passed downstream more rapidly when the illuminated route was selected. This study quantified the response of the critically endangered European eel to ALAN under an experimental setting, providing the foundations for future field based research to validate these findings, and offering insight on the ecological impacts of this major environmental pollutant and driver of global change.
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 0269-7491 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3313
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Author Li, Y.; Shi, K.; Wang, Y.; Yang, Q.
Title Quantifying and Evaluating the Cultivated Areas Suitable for Fallow in Chongqing of China Using Multisource Data Type Journal Article
Year (down) 2021 Publication Land Abbreviated Journal Land
Volume 10 Issue 1 Pages 74
Keywords Remote Sensing
Abstract The quantitative evaluation of the suitability of land fallow is of great significance to the effective implementation of fallow system in rural China. The purpose of this study is to systematically evaluate the cultivated areas suitable for fallow in Chongqing, China. The results show that: (1) a comprehensive index of cultivated land fallow (ILF) was developed by employing a series of multi—source data, and the ILF has been proven as an effective proxy to identify the cultivated areas suitable for fallow; (2) cultivated land with ILF values above the average value accounts for 34.38% (9902 km2) of the total cultivated land; (3) the ILF is negatively correlated with the population density, transportation proximity, and proportion of inclined area. This study argued that the ILF can reflect the cultivated areas suitable for fallow in Chongqing and can provide guidance for the spatial distribution of cultivated land fallow. The findings indicated that the differences in geographical elements between karst and non—karst areas must be further investigated, and the evaluation accuracy of the cultivated areas suitable for fallow must be improved.
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 2073-445X ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3314
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