Temporal Profiles of Urban Lighting: Proposal for a research design and first results from three sites in Berlin
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Abstract
This paper presents and experimentally applies a research design for studying the temporal dimension of outdoor artificial illumination in complex lightscapes such as those of urban centres. It contributes to filling the gap between analyses of high-resolution aerial imagery, which provide detailed but static information on the spatial composition of lightscapes, and existing methods for studying their dynamics, which measure changes at high levels of aggregation. The research design adopts a small-scale, detailed approach by using close-range time-lapse videos to document the on/off patterns of individual light sources as the night progresses. It provides a framework and vocabulary for discrete and comparative analyses of the identified temporal profiles of lighting. This allows for pinpointing similarities and differences among the dynamics of different places, nights or categories of lighting. Its application to three case studies in Berlin indicate that switch-on and switch-off times are clustered, resulting in static and dynamic phases of the night. Midnight is a temporal fault-line, after which full illumination ends as portions of the illumination are extinguished. Switch-off times and -rates differ among the three lightscapes and, especially, among four functional types of lighting that were differentiated: infrastructural and commercial units largely remain on all night, while substantial portions of architectural and indoor lighting are switched off, though at fairly different times. Such findings are valuable for studies based on data collected at specific points in time (aerial imagery, measurements), for informing and monitoring temporally oriented lighting policies, and for understanding urban dynamics at large.
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urban lightscapes, temporality, dynamics, documentation, classification
[2] Gaston, K. J., Gaston, S., Bennie, J., & Hopkins, J. (2014). Benefits and costs of artificial nighttime lighting of the environment. Environmental Reviews, 23(1), 14-23. https://doi.org/10.1139/er-2014-0041
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[3] Pottharst, M., & Wukovitsch, F. (2015). The Economics of Night-Time Illumination. In J. Meier, U. Hasenöhrl, K. Krause, & M. Pottharst (Eds.), Urban Lighting, Light Pollution and Society (pp. 203–223). Routledge.
[4] Falchi, F., Cinzano, P., Duriscoe, D., Kyba, C. C. M., Elvidge, C. D., Baugh, K., … Furgoni, R. (2016). The new world atlas of artificial night sky brightness. Science Advances, 2(6), e1600377. https://doi.org/10.1126/sciadv.1600377
[5] Kyba, C. C. M., Kuester, T., Miguel, A. S. de, Baugh, K., Jechow, A., Hölker, F., … Guanter, L. (2017). Artificially lit surface of Earth at night increasing in radiance and extent. Science Advances, 3(11), e1701528. https://doi.org/10.1126/sciadv.1701528
[6] Henckel, D., & Moss, T. (2015). Towards a Brighter Future? Conclusions for Lighting Research and Policy. In J. Meier, U. Hasenöhrl, K. Krause, & M. Pottharst (Eds.), Urban Lighting, Light Pollution and Society (pp. 299–303). Routledge.
[7] Bará, S. (2016). Anthropogenic disruption of the night sky darkness in urban and rural areas. Open Science, 3(10), 160541. https://doi.org/10.1098/rsos.160541
[8] Ges, X., Bará, S., García-Gil, M., Zamorano, J., Ribas, S. J., & Masana, E. (2017). Light pollution offshore: zenithal sky glow measurements in the Mediterranean coastal waters. http://arxiv.org/abs/1705.02508
[9] Kyba, C. C. M., Tong, K. P., Bennie, J., Birriel, I., Birriel, J. J., Cool, A., … Gaston, K. J. (2015). Worldwide variations in artificial skyglow. Scientific Reports, 5. https://doi.org/10.1038/srep08409
[10] Kyba, C. C. M., Garz, S., Kuechly, H., de Miguel, A. S., Zamorano, J., Fischer, J., & Hölker, F. (2014). High-Resolution Imagery of Earth at Night: New Sources, Opportunities and Challenges. Remote Sensing, 7(1), 1–23. https://doi.org/10.3390/rs70100001
[11] Sánchez de Miguel, A. (2015). Spatial, Temporal and Spectral Variation of Light Pollution and its Sources: Methodology and Results. Universidad Complutense de Madrid.
[12] Dobler, G., Ghandehari, M., Koonin, S. E., Nazari, R., Patrinos, A., Sharma, M. S., … Wurtele, J. S. (2015). Dynamics of the urban lightscape. Information Systems, 54, 115–126. https://doi.org/10.1016/j.is.2015.06.002
[13] Bará, S., Rodríguez-Arós, Á., Pérez, M., Tosar, B., Lima, R. C., de Miguel, A. S., & Zamorano, J. (2017). Estimating the relative contribution of streetlights, vehicles and residential lighting to the urban night sky brightness. http://arxiv.org/abs/1706.04458
[14] Oxford Dictionaries. (n.d.). Landscape – definition of landscape in English. Oxford Dictionaries. https://en.oxforddictionaries.com/definition/landscape
[15] Senatsverwaltung für Stadtentwicklung und Umwelt Berlin (2015). Stadtbild Berlin: Lichtkonzept. Handbuch.
[16] Krause, K. (2015). Regulating Urban Lighting: Prospects for Institutional Change. In J. Meier, U. Hasenöhrl, K. Krause, & M. Pottharst (Eds.), Urban Lighting, Light Pollution and Society (pp. 125–140). Routledge.
[17] ISR. (2011). Zeiteffiziente Stadt – Zeitgerechte Stadt (Project Report). TU Berlin, Institut für Stadt- und Regionalplanung.
[18] Kuechly, H. U., Kyba, C. C. M., Ruhtz, T., Lindemann, C., Wolter, C., Fischer, J., & Hölker, F. (2012). Aerial survey and spatial analysis of sources of light pollution in Berlin, Germany. Remote Sensing of Environment, 126, 39–50. https://doi.org/10.1016/j.rse.2012.08.008
[19] Hale, J. D., Davies, G., Fairbrass, A. J., Matthews, T. J., Rogers, C. D. F., & Sadler, J. P. (2013). Mapping Lightscapes: Spatial Patterning of Artificial Lighting in an Urban Landscape. PLoS ONE, 8(5), e61460. https://doi.org/10.1371/journal.pone.0061460
[20] ISR. (2013). LichtGestalten: Analyse-, Gestaltungs-, und Konfliktpotenziale (Project Report). TU Berlin, Institut für Stadt- und Regionalplanung.
[21] République Francaise (2013). Arrêté du 25 janvier 2013 relatif à l’éclairage nocturne des bâtiments non résidentiels afin de limiter les nuisances lumineuses et les consommations d’énergie.
[22] Meier, J., & Henckel, D. (2017). Illuminating an Urban Zone of Extended Activity: An Exploration into Temporal Profiles of Urban Functions, Public Transport and Artificial Lighting. In G. Drevon, L. Gwiazdzinski, & O. Klein (Eds.), Chronotopies / Chronotopics. Lecture et écriture des mondes en mouvement / Readings and writings on a world in movement (pp. 128–135). Elya editions.
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