![]() ![]() ![]() ![]() Satellite products of the world’s nighttime lights have proved valuable for quantifying trends in ALAN ( Bennie et al., 2014 Kyba et al., 2017), and exposure in terrestrial ecosystems ( Mazor et al., 2013 Duffy et al., 2015 McLaren et al., 2018) and protected areas ( Gaston et al., 2015). The spectral signature of land-based light sources is detectable on the biodiverse coral reef ecosystems of the Red Sea ( Tamir et al., 2017), and radiative transfer modeling of in-water ALAN skyglow transmission suggests that up to three-quarters of the seafloor adjacent to cities can be exposed to artificial light irradiances sufficient to elicit biological responses ( Davies et al., 2020). Much of this light will enter the world’s seas and oceans, which until now has been difficult to quantify. Satellite-derived images of the world’s nighttime lights have been successfully coupled with atmospheric light dispersion models to produce new insights into the prevalence and growth of ALAN skyglow on land ( Falchi et al., 2016a Kyba et al., 2017). One of the clearest demonstrations that we have entered another epoch, the urbanocene ( West, 2018), is the prevalence of artificial light at night (ALAN) visible from space ( Falchi et al., 2016a). ![]()
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