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Author Noll, S.; Kausch, W.; Barden, M.; Jones, A.M.; Szyszka, C.; Kimeswenger, S.; Vinther, J. url  doi
openurl 
  Title An atmospheric radiation model for Cerro Paranal: I. The optical spectral range* Type Journal Article
  Year 2012 Publication Astronomy & Astrophysics Abbreviated Journal A&A  
  Volume (down) 543 Issue Pages A92  
  Keywords atmospheric effects; site testing; radiative transfer; radiation mechanisms: general; scattering; techniques; spectroscopic; modeling; observatories; Cerro Paranal  
  Abstract Aims. The Earth’s atmosphere affects ground-based astronomical observations. Scattering, absorption, and radiation processes deteriorate the signal-to-noise ratio of the data received. For scheduling astronomical observations it is, therefore, important to accurately estimate the wavelength-dependent effect of the Earth’s atmosphere on the observed flux.

Methods. In order to increase the accuracy of the exposure time calculator of the European Southern Observatory’s (ESO) Very Large Telescope (VLT) at Cerro Paranal, an atmospheric model was developed as part of the Austrian ESO In-Kind contribution. It includes all relevant components, such as scattered moonlight, scattered starlight, zodiacal light, atmospheric thermal radiation and absorption, and non-thermal airglow emission. This paper focuses on atmospheric scattering processes that mostly affect the blue (<0.55&#8201;&#956;m) wavelength regime, and airglow emission lines and continuum that dominate the red (>0.55&#8201;&#956;m) wavelength regime. While the former is mainly investigated by means of radiative transfer models, the intensity and variability of the latter is studied with a sample of 1186 VLT FORS&#8201;1 spectra.

Results. For a set of parameters such as the object altitude angle, Moon-object angular distance, ecliptic latitude, bimonthly period, and solar radio flux, our model predicts atmospheric radiation and transmission at a requested resolution. A comparison of our model with the FORS&#8201;1 spectra and photometric data for the night-sky brightness from the literature, suggest a model accuracy of about 20%. This is a significant improvement with respect to existing predictive atmospheric models for astronomical exposure time calculators.
 
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  ISSN 0004-6361 ISBN Medium  
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  Notes Approved no  
  Call Number IDA @ john @ Serial 274  
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Author Bruning, A.; Hölker, F.; Franke, S.; Kleiner, W.; Kloas, W. url  doi
openurl 
  Title Impact of different colours of artificial light at night on melatonin rhythm and gene expression of gonadotropins in European perch Type Journal Article
  Year 2015 Publication The Science of the Total Environment Abbreviated Journal Sci Total Environ  
  Volume (down) 543 Issue Pt A Pages 214-222  
  Keywords Animals; Fish; Gonadotropins; Light pollution; Melatonin; Perca fluviatilis; Reproduction; Spectral sensitivity  
  Abstract The distribution and intensity of artificial light at night, commonly referred to as light pollution, is consequently rising and progressively also ecological implications come to light. Low intensity light is known to suppress nocturnal melatonin production in several fish species. This study aims to examine the least suppressive light colour for melatonin excreted into the holding water and the influence of different light qualities and quantities in the night on gene expression of gonadotropins in fish. European perch (Perca fluviatilis) were exposed to light of different wavelengths during the night (blue, green, and red). Melatonin concentrations were measured from water samples every 3h during a 24h period. Gene expression of gonadotropins was measured in perch exposed to different light colours and was additionally examined for perch subjected to different intensities of white light (0lx, 1lx, 10lx, 100lx) during the night. All different light colours caused a significant drop of melatonin concentration; however, blue light was least suppressive. Gene expression of gonadotropins was not influenced by nocturnal light of different light colours, but in female perch gonadotropin expression was significantly reduced by white light already at the lowest level (1lx). We conclude that artificial light with shorter wavelengths at night is less effective in disturbing biological rhythms of perch than longer wavelengths, coinciding with the light situation in freshwater habitats inhabited by perch. Different light colours in the night showed no significant effect on gonadotropin expression, but white light in the night can disturb reproductive traits already at very low light intensities. These findings indicate that light pollution has not only the potential to disturb the melatonin cycle but also the reproductive rhythm and may therefore have implications on whole species communities.  
  Address Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Muggelseedamm 310, 12587, Berlin, Germany. Electronic address: werner.kloas(at)igb-berlin.de  
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  Language English Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0048-9697 ISBN Medium  
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  Notes PMID:26584071 Approved no  
  Call Number IDA @ john @ Serial 1302  
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Author Brüning A., Hölker, F., Franke, S., Preuer, T., Kloas, W. url  doi
openurl 
  Title Impact of different colours of artificial light at night on melatonin rhythm and gene expression of gonadotropins in European perch Type Journal Article
  Year 2016 Publication Science of The Total Environment Abbreviated Journal  
  Volume (down) 543 Issue Pages 214-222  
  Keywords Animals  
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  Notes Approved no  
  Call Number LoNNe @ schroer @ Serial 1294  
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Author Wehr, T.A.; Aeschbach, D.; Duncan, W.C. url  doi
openurl 
  Title Evidence for a biological dawn and dusk in the human circadian timing system Type Journal Article
  Year 2001 Publication The Journal of Physiology Abbreviated Journal J Physiology  
  Volume (down) 535 Issue 3 Pages 937-951  
  Keywords Human Health  
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  Series Volume Series Issue Edition  
  ISSN 0022-3751 ISBN Medium  
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  Notes Approved no  
  Call Number LoNNe @ kagoburian @ Serial 831  
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Author Pendoley, K.; Kamrowski, R. url  doi
openurl 
  Title Influence of horizon elevation on the sea-finding behaviour of hatchling flatback turtles exposed to artificial light glow Type Journal Article
  Year 2015 Publication Marine Ecology Progress Series Abbreviated Journal Mar. Ecol. Prog. Ser.  
  Volume (down) 529 Issue Pages 279-288  
  Keywords Animals; Hatchling orientation; Artificial lighting; Horizon elevation; Marine turtle; Conservation management; Elevation; Industry; Coastal development; Sea turtle; Sea turtle conservation  
  Abstract Marine turtles are threatened globally by increasing coastal development. In particular, increased artificial lighting at the nesting beach has the potential to disrupt turtle breeding success. Few published data exist regarding the behaviour of the flatback turtle Natator depressus, a species endemic to Australia, in response to artificial light. Given the ongoing industrialisation of the Australian coastline, this study is a timely investigation into the orientation of flatback hatchlings exposed to light glow produced by lighting typically used in industrial settings. We recorded the orientation of hatchlings at the nesting beach on Barrow Island, Western Australia, exposed to 3 types of standard lighting — high-pressure sodium vapour (HPS), metal halide (MH), and fluorescent white (FW)—at 3 different intensities. The light array was positioned either behind a high dune (producing a high, dark silhouette; 16° elevation), or in a low creek bed (producing a low silhouette and bright horizon; 2° elevation). At medium and high light intensities of all 3 light types, hatchlings were significantly less ocean-oriented when exposed to light at 2° elevation compared to 16° elevation. This difference remained with glow from low-intensity MH light; however, there was no significant difference in orientation of hatchlings exposed to low- intensity HPS and FW light glow at either elevation. Our study emphasises the importance of horizon elevation cues in hatchling sea-finding. Since all species of marine turtles show similar sea-finding behaviour, our results have important implications for management of lighting adjacent to turtle nesting beaches in Australia and elsewhere, as coastal development continues.  
  Address Pendoley Environmental Pty Ltd, 12A Pitt Way, Booragoon, Western Australia 6154, Australia; ruth.kamrowski@penv.com.au  
  Corporate Author Thesis  
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  Language English Summary Language English Original Title  
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  Series Volume Series Issue Edition  
  ISSN 0171-8630 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1189  
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