| Records |
| Author |
Aboushelib, M.F.; Abozaid, A.A.; Nawar, S.; Hendy, Y.H.M.; Morcos, A.B. |
| Title |
Preliminary site selection for an observatory in the Egyptian Eastern Desert |
Type |
Journal Article |
| Year |
2019 |
Publication |
Astrophysics and Space Science |
Abbreviated Journal |
Astrophys Space Sci |
| Volume |
364 |
Issue |
10 |
Pages |
163 |
| Keywords |
Skyglow; Astronomy; Observatory; Egypt; Africa; Sky Quality Meter |
| Abstract |
This work aims for choosing preliminary sites that can be candidates for a new astronomical observatory that will replace the Kottamia observatory. The candidate sites have been selected to be investigated after proposing a few criteria. Concerning light pollution and elevation of the sites as the main factors, we chose the candidate sites depending on the zenith sky brightness and the elevation. The night sky brightness has been measured using a Sky Quality Meter at different altitude degrees and the values of the zenith sky brightness were compared to those of different observatory sites. Our night sky brightness observations were found to be in agreement with the satellite’s data and comparable to those of dark sites, with average values of 22.07, 22.03, 21.57 and 21.58 magSQM/arcsec2. We also have obtained the Aerosol Optical Depth (AOD) and extinction coefficient due to the aerosol for the candidate sites using satellite data (Terra/MODIS). |
| Address |
National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt; m.f.aboushelib(at)nriag.sci.eg |
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Thesis |
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| Publisher |
Springer |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
English |
Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0004-640X |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial  |
2690 |
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| Author |
Ściężor, T. |
| Title |
Overnight measurements of the sky brightness as a method for assessing the cloudiness |
Type |
Journal Article |
| Year |
2019 |
Publication |
Photonics Letters of Poland |
Abbreviated Journal |
Photon.Lett.PL |
| Volume |
11 |
Issue |
3 |
Pages |
72 |
| Keywords |
Skyglow; Remote Sensing |
| Abstract |
Determining the state of cloudiness at night is always a problem, especially at low levels of light pollution. This paper presents an innovative method of assessing the cloudiness of the night sky solely on the basis of all-night measurements of the brightness of the sky using generally available SQM meters. Using the numerical method of calculating the discrete derivative of overnight brightness of the night sky from time it is possible not only to distinguish a cloudless sky from a cloudy one, but even to distinguish high level clouds from medium or low. |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2080-2242 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2689 |
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| Author |
Jechow, A.; Hölker, F. |
| Title |
How dark is a river? Artificial light at night in aquatic systems and the need for comprehensive night‐time light measurements |
Type |
Journal Article |
| Year |
2019 |
Publication |
Wiley Interdisciplinary Reviews: Water |
Abbreviated Journal |
WIREs Water |
| Volume |
6 |
Issue |
6 |
Pages |
e1388 |
| Keywords |
Ecology; Skyglow; Review |
| Abstract |
Freshwater ecosystems are hotspots of biodiversity. They are of major importance for humans because they provide vital ecosystem services. However, as humans tend to settle near freshwaters and coastal areas, these ecosystems are also over‐proportionally affected by anthropogenic stressors. Artificial light at night can occur as a form of environmental pollution, light pollution. Light pollution affects large areas on a worldwide scale, is growing exponentially in radiance and extent and can have diverse negative effects on flora, fauna and on human health. While the majority of ecological studies on artificial light at night covered terrestrial systems, the studies on aquatic light pollution have unraveled impact on aquatic organisms, ecosystem functions as well as land‐water‐interactions. Although monitoring of light pollution is routinely performed from space and supported by ground‐based measurements, the extent and the amount of artificial light at night affecting water bodies is still largely unknown. This information, however, is essential for the design of future laboratory and field experiments, to guide light planners and to give recommendations for light pollution regulations. We analyze this knowledge gap by reviewing night‐time light measurement techniques and discuss their current obstacles in the context of water bodies. We also provide an overview of light pollution studies in the aquatic context. Finally, we give recommendations on how comprehensive night‐time light measurements in aquatic systems, specifically in freshwater systems, should be designed in the future. |
| Address |
Ecohydrology, Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; andreas.jechow(at)gmx.de |
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Thesis |
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| Publisher |
Wiley |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
English |
Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
2049-1948 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2688 |
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| Author |
Ranzoni, J.; Giuliani, G.; Huber, L.; Ray, N. |
| Title |
Modelling the nocturnal ecological continuum of the State of Geneva, Switzerland, based on high-resolution nighttime imagery |
Type |
Journal Article |
| Year |
2019 |
Publication |
Remote Sensing Applications: Society and Environment |
Abbreviated Journal |
Remote Sensing Applications: Society and Environment |
| Volume |
16 |
Issue |
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Pages |
100268 |
| Keywords |
Remote Sensing; Ecology; Switzerland; Europe; orthophotography; viewshed analysis |
| Abstract |
The increase of artificial light in recent decades has led to a general awareness of the harmful consequences of light pollution on biodiversity. The artificial light is however rarely taken into account in the principles of developing ecological networks. There is currently no standardized method for integrating this darkness factor into ecological network modeling. We propose a methodology for the identification of the nocturnal continuum through an approach based on the automated extraction of light sources from nocturnal orthophotography and the modeling of their visibility within a territory. The model is applied to the transboundary region of the Geneva basin in Switzerland and allows for the integration of the darkness factor into the existing ecological networks. Although the analysis does not consider metric lighting data, a viewshed analysis allows for a first large-scale mapping of the nighttime continuum and highlights the areas benefiting from very low light pollution. |
| Address |
University of Applied Sciences and Arts, Route de Presinge 150, 1254, Jussy, Switzerland; jessica.ranzoni(at)hesge.ch |
| Corporate Author |
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Thesis |
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| Publisher |
Elsevier |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
English |
Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
2352-9385 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2687 |
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| Author |
Marchant, P. |
| Title |
Do brighter, whiter street lights improve road safety? |
Type |
Journal Article |
| Year |
2019 |
Publication |
Significance |
Abbreviated Journal |
Significance |
| Volume |
16 |
Issue |
5 |
Pages |
8-9 |
| Keywords |
Public Safety; Lighting; Statistics |
| Abstract |
Would a billion‐dollar investment in improved street lighting make Australian roads safer at night? Paul Marchant finds the evidence wanting |
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Place of Publication |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1740-9705 |
ISBN |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
GFZ @ kyba @ |
Serial |
2686 |
| Permanent link to this record |
