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Author Stock, D. M.
Title LOCALIZED LIGHT SENSORY IN RELATION TO GRAZING ACTIVITY OF ECHINOMETRA MATHAEI Type Journal Article
Year 2018 Publication (up) Abbreviated Journal
Volume Issue Pages
Keywords Animals
Abstract This paper offers insight on the regulation of nocturnal behavior in burrowing sea urchin Echinometra mathaei of the Pacific. While it is known E. mathaei maintains nocturnal hours of activity (primarily grazing, burrowing, and locomotion), it is unknown whether this pattern follows a circadian rhythm or responds to local conditions of darkness. Varying light treatments were tested to determine potential manipulation of active behavior and explore potential for habitat destruction. Light manipulation was used to determine the role light sensory plays in the regulation of normal behavior. First utilizing gradual manipulation and later utilizing sudden manipulation to differentiate response to light stimuli. It was determined that while E. mathaei maintains nocturnal

activity via localized light sensory, manipulation of latent hours could not be significantly reproduced. It was found that while light manipulation can be responsible for simulating hours of activity, light manipulation cannot replicate latent hours. Upon exploration of predator response capability in E. mathaei following manipulation, it was found that individuals exposed to prolonged periods of artificial light had slower predation response times than individuals acclimated to a regular pattern of light exposure. These findings connect potential habitat degradation via grazing behaviors of E. mathaei to anthropogenic activity in Mo’orea, French Polynesia.
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Call Number IDA @ intern @ Serial 2653
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Author Wuchterl, G.; Reithofer, M.
Title Licht über Wien V Type Journal Article
Year 2017 Publication (up) Abbreviated Journal
Volume Issue Pages
Keywords Skyglow
Abstract Die hier präsentierte Studie gibt einen detaillierten Überblick zur Entwicklung derLichtverschmutzung über dem Stadtgebiet von Wien in den Jahren 2011 bis 2017 und bietet einePrognose bis 2020. Damit ist international erstmals eine Langzeitstudie über die Entwicklung derLichtverschmutzung einer Großstadt verfügbar. Im Rahmen der begleitenden Untersuchungen sindAussagen über die Verursacher und ihre spezifischen Anteile an der Lichtverschmutzung Wiensmöglich. Die aktuelle Umrüstung auf LED-Technik wird diskutiert und findet Eingang in diePrognose. Neue Messungen und Analysen von internationalen Teams werden kurz vorgestellt undbezüglich ihrer Relevanz vergleichend mit unserer Studie diskutiert.
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Publisher Place of Publication Editor
Language German Summary Language Original Title
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2717
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Author Wuchterl, G.; Reithofer, M.
Title Licht über Wien VI Type Journal Article
Year 2018 Publication (up) Abbreviated Journal
Volume Issue Pages
Keywords Skyglow
Abstract Im Zentrum Wiens sättigt die Erhellung der Nacht, am Stadtrand sinken die jährlichen Zuwächse, wäh-rend im Abstand von 36 Kilometern (Großmugl) die Nächte um 10 % pro Jahr heller werden.Der Gesamtaufwand der Wiener Lichtglocke liegt 2018 bei 37 MW. Der Verlauf von 2011 bis 2018 zeigt ein deutliches Lichtmaximum um 2014 und 2015. Danach stellen wir einen allmählichen Rückgang fest.Der Verlauf der Lichtglocke und noch deutlicher jener der Einzelstationen zeigt signifikante Schwankun-gen von Jahr zu Jahr. Zur Aufklärung der Ursachen, die weder astronomisch noch meteorologisch sind, wur-den monatliche Analysen des Lichtmessnetzes mit Daten des Luftmessnetzes der Wiener MA 22 kombiniert. Die natürliche Variation über das Jahr wurde genutzt, um Zusammenhänge zwischen den Monatsmedianen von Luftfeuchtigkeit und Feinstaub mit jenen der Globalstrahlungsdaten zu suchen.Von 2016 bis 2018 korrelieren die Globalstrahlungswerte mit der relativen Luftfeuchtigkeit und den Feinstaubwerten (PM10 und PM2,5). Die engste Beziehung besteht auf der Kuffner-Sternwarte, wo eine Verdoppelung der Luftfeuchtigkeit statistisch von einer Verzehnfachung der Globalstrahlung begleitet wird. Die gefundenen Relationen sind über einen Faktor 100 in der Globalstrahlung äußerst robust und die Koeffizienten der Relationen sind an allen Stationen sehr homogen.Damit stehen gut bestimmte Zusammenhänge zwischen der Luftgüte und dem Zustand der klaren Atmo-sphäre zur Verfügung. Das wird es erlauben, Lichtmessnetze auf Standardatmosphären zu beziehen und damit eine wesentlich bessere Vergleichbarkeit der Daten zu unterschiedlichen Zeitpunkten herzustellen.- 130 Gigawattstunden Jahresaufwand für die Wiener Lichtglocke- 8 Jahre Vermessung der Lichtglocke zeigen Ansätze eines Rückgangs der Lichtflut- Mehr Feinstaub bewirkt überproportional mehr Lichtverschmutzung
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Language German Summary Language Original Title
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2718
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Author Müller-Crepon, C.
Title Indirect Rule, Cash Crop Production, and Development in Africa Type Journal Article
Year 2020 Publication (up) Abbreviated Journal
Volume Issue Pages
Keywords Remote Sensing
Abstract Colonial governance in Africa varied considerably in its extent of indirect rule

through precolonial institutions. Assessing the developmental consequences

of indirect rule, this paper argues that it strengthened populations’ bargaining

power and increased public service provision in return for taxation of agricultural produce, in particular cash crops. To test this argument, I exploit variation in the indirectness of colonial rule: whereas British indirect rule increased in the centralization of precolonial institutions, the French implemented more uniform direct rule. I furthermore measure public service provision with georeferenced education outcomes of individuals born and raised under colonial rule and use soils’ suitability for cash crop production as an exogenous proxy for real production. Supporting the theoretical claim, the effect of cash crop suitability on primary education increases with precolonial centralization in former British colonies, but not in French ones. Comparisons of education rates in neighboring ethnic groups with different levels of centralization and ethnic groups cut by British-French boundaries reaffirm this result. Contemporary development outcomes show patterns consistent with persistent effects

of indirect rule in cash crop producing areas. The findings underscore the joint

importance of political institutions and resource endowments in determining

local development.
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Notes Approved no
Call Number IDA @ intern @ Serial 2956
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Author Ribas, S. J.; Aubé, M.; Bará, S.; Bouroussis, C.; Canal-Domingo, R.; Espey, B.; Hänel, A.; Jechow, A.; Kolláth, Z.; Marti, G.; Massana, P.; Schmidt, W.; Spoelstra, H.; Wuchterl, G.; Zamorano, J.; Kyba, C.
Title Report of the 2016 STARS4ALL/LoNNe Intercomparison Campaign Type Report
Year 2017 Publication (up) Abbreviated Journal
Volume Issue Pages
Keywords Skyglow; Instrumentation
Abstract The 2016 LoNNe (Loss of the Night Network) intercomparison campaign is the fourth of four campaigns planned during EU COST Action ES1204. The first campaign took place in 2013 in Lastovo, Croatia, the second in Madrid, Spain (Bará et al 2015), the third in Torniella and Florence, Italy (Kyba et al 2015a). The 2016 campaign took place at the Parc Astronòmic Montsec (PAM). The campaign continued the strategy of taking measurements at multiple sites, this year with a main fixed site and then excursions to other sites. The goals of the campaigns included:

● Understanding the difference between extinction measurements made by DSLR photometry and classical astronomical (telescope) photometry, and also understanding the relation between extinction and sky brightness at these two sites.

● Examining the difference in radiance measured with the mosaic technique of the US National Parks Service camera compared to all-sky fisheye imagery

● Examining the relationships between all-sky and zenith radiance reported by different instruments

● Quantifying the sky brightnes at the sites, including full zenith spectral radiance at selected locations

● Measuring the systematic uncertainty on handheld SQM observations due to unit-to-unit differences
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Publisher GFZ Data Services Place of Publication Editor
Language Summary Language Original Title
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Series Volume Series Issue Edition
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Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 3057
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