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Author Strutt, R.J.
Title (up) A photoelectric method of measuring the light of the night sky with studies of the course of variation through the night Type Journal Article
Year 1929 Publication Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character Abbreviated Journal Proc. R. Soc. Lond. A
Volume 124 Issue 794 Pages 395-408
Keywords Instrumentation; Natural Sky Brightness; Airglow
Abstract The investigations already published on the intensity of the night sky have been made by means of visual photometry, using a convenient instrument with a self-contained luminous source of radioactive origin. Nothing could rival this for simplicity and portability; it is always ready and requires no attention. On the other hand visual photometry is not a very satisfactory process even for ordinary light, and with this faint light it is far from giving the desirable degree of accuracy. I have therefore spent much effort in trying to replace it by some photoelectric method of measurement. A satisfactory method has now been evolved, and will be described, together with the results. A preliminary notice of the earlier results was given in a paper written at the request of Prof. S. Chapman, F. R. S., Chairman of the International Committee on Terrestrial and Solar Relationships, the receipt of which was acknowledged by him on June 19, 1928. The relevant passage is:- “Most of the difficulties have been overcome and preliminary observations have been in progress for some months past. I have been able to follow the changes of intensity from hour to hour on clear nights. Some evidence has been found suggesting diurnal periodicity. The observed intensity nearly always increases between nightfall and midnight, beyond which the observations have not usually been carried.”
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Series Volume Series Issue Edition
ISSN 0950-1207 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3124
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Author Elvey, C.T.; Roach, F.E.
Title (up) A Photoelectric Study of the Light from the Night Sky Type Journal Article
Year 1937 Publication The Astrophysical Journal Abbreviated Journal ApJL
Volume 85 Issue Pages 213
Keywords Instrumentation; Sky Brightness
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ISSN 0004-637X ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2399
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Author Mirzakhalil, S.H.; Bidgoli, S.A.
Title (up) A Photographic Investigation of Tehran's Light Pollution from North and East Directions Type Journal Article
Year 2017 Publication Anthropogenic Pollution Abbreviated Journal
Volume 1 Issue 1 Pages 18-24
Keywords Skygow
Abstract Tehran is the most affected town by light pollution in Iran. In this study, the role of the regional topography in the distribution of light pollution in Tehran was evaluated using digital images recording and analyzing the obtained images from Tehran sky-glow by East and South in standard image-processing Software. The scale of Tehran's glowing =dome as measured by 17 mag/arc sec2 or 0.017 cd/m2 by South, and 18.7 (mag/arc sec2) or 0.0035 cd/m2 by East. Considering the approximately equal distance of the two viewpoints from the center of Tehran city, the calculated scale by South is 1.36 times larger than the amount from the East point.
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Notes Approved no
Call Number GFZ @ kyba @ Serial 3047
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Author Caruana, J.; Vella, R.; Spiteri, D.; Nolle, M.; Fenech, S.; Aquilina, N.J.
Title (up) A photometric mapping of the night sky brightness of the Maltese islands Type Journal Article
Year 2020 Publication Journal of Environmental Management Abbreviated Journal J Environ Manage
Volume 261 Issue Pages 110196
Keywords Skyglow; *Atmosphere; Ecology; *Environmental Pollution; Humans; Islands; Light pollution; Night sky brightness; Site testing; Techniques: photometric
Abstract Over the years, the Maltese Islands have seen a marked rise in the prevalence of artificial lighting at night. The most evident type of light pollution arising from this evolution in anthropogenic night-time lighting is artificial skyglow via partial back-scattering in the atmosphere, leading to an increase in the Night Sky Brightness (NSB). The importance of understanding and quantifying the geographical distribution of the NSB is underscored by the adverse impact of light pollution on various spheres, from astronomical observation to ecology and human health. For the first time, we present a detailed map of the NSB over the Maltese archipelago carried out with Unihedron Sky Quality Meters. We show that the vast majority of the area of the Maltese Islands is heavily light polluted, with 87% of the area registering a NSB < 20.39magSQM/arcsec(2) (Bortle Class 5 or higher) and 37.3% < 19.09magSQM/arcsec(2) (Bortle Class 6 or higher), with the Milky Way being visible for only 12.8% of the area (adopting a visibility threshold > 20.4 – 21.29magSQM/arcsec(2); Bortle Class 4). Coastal Dark Sky Heritage Areas on the island of Gozo retain generally darker skies than the rest of the islands, but light pollution originating further inland is encroaching upon and adversely affecting these sites. The methodology presented in this study can be adopted for continued future studies in Malta as well as for other regions.
Address Department of Geosciences, University of Malta, Msida MSD 2080, Malta; joseph.caruana ( at ) um.edu.mt
Corporate Author Thesis
Publisher Elsevier Place of Publication Editor
Language English Summary Language English Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0301-4797 ISBN Medium
Area Expedition Conference
Notes PMID:31999608 Approved no
Call Number IDA @ john @ Serial 3404
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Author Grubisic, M.; Singer, G.; Bruno, M.C.; van Grunsven, R.H.A.; Manfrin, A.; Monaghan, M.T.; Hölker, F.
Title (up) A pigment composition analysis reveals community changes in pre-established stream periphyton under low-level artificial light at night Type Journal Article
Year 2018 Publication Limnologica Abbreviated Journal
Volume 69 Issue Pages 55-58
Keywords Plants; Ecology
Abstract Freshwaters are increasingly exposed to artificial light at night (ALAN), yet the consequences for aquatic primary producers remain largely unknown. We used stream-side flumes to expose three-week-old periphyton to LED light. Pigment composition was used to infer community changes in LED-lit and control periphyton before and after three weeks of treatment. The proportion of diatoms/chrysophytes decreased (14%) and cyanobacteria increased (17%) in lit periphyton in spring. This may reduce periphyton nutritional quality in artificially-lit waters.
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ISSN 0075-9511 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number LoNNe @ schroer @ Serial 1791
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