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Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems.

ABSTRACT: The diurnal cycle of light and dark is one of the strongest environmental factors for life on Earth. Many species in both terrestrial and aquatic ecosystems use the level of ambient light to regulate their metabolism, growth, and behavior. The sky glow caused by artificial lighting from urban areas disrupts this natural cycle, and has been shown to impact the behavior of organisms, even many kilometers away from the light sources. It could be hypothesized that factors that increase the luminance of the sky amplify the degree of this "ecological light pollution". We show that cloud coverage dramatically amplifies the sky luminance, by a factor of 10.1 for one location inside of Berlin and by a factor of 2.8 at 32 km from the city center. We also show that inside of the city overcast nights are brighter than clear rural moonlit nights, by a factor of 4.1. These results have important implications for choronobiological and chronoecological studies in urban areas, where this amplification effect has previously not been considered.

SUBMITTER: Kyba CC

PROVIDER: S-EPMC3047560 | biostudies-literature | 2011 Mar

REPOSITORIES: biostudies-literature

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Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems.

Kyba Christopher C M CC Ruhtz Thomas T Fischer Jürgen J Hölker Franz F

PloS one 20110302 3

The diurnal cycle of light and dark is one of the strongest environmental factors for life on Earth. Many species in both terrestrial and aquatic ecosystems use the level of ambient light to regulate their metabolism, growth, and behavior. The sky glow caused by artificial lighting from urban areas disrupts this natural cycle, and has been shown to impact the behavior of organisms, even many kilometers away from the light sources. It could be hypothesized that factors that increase the luminance ...[more]

PMID: 21399694

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Dataset Information

Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems.

Publications

Cloud coverage acts as an amplifier for ecological light pollution in urban ecosystems.

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