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Authors
Advisor(s)
Abstract(s)
Light pollution (LP) affects Mainland Portugal in accordance to its asymmetric demographic distribution. The strongest LP sources are distributed along the densely populated coastal line, whereas the interior north and south of the country is still generally well preserved due to a much lower demographic density. In the period 2010-2014, on selected moonless and cloudless nights, we assessed the skyglow of two dark sky regions (the Peneda-Gerês National Park, a mountain region, and the Lake Alqueva region, typically plain) with a portable Unihedron SQM-L unit pointed handheld to the zenith. The data from the field measurements was used to compare to one light pollution propagation model (Kocifaj, 2007), using calibrated VIIRS DNB satellite upwards radiance (calibration by Zamorano et al, 2012) as input to the model. The results obtained from the model are favourably compared to the field measurements. We proceeded to a set of tests with the model (programmed in MATLAB) to find the best fit. Our best results were achieved by analysing the data by night rather than the global set of data. Our results were used to apply to the classification of the Alqueva as a Starlight Tourism Destination and light pollution guidelines were implemented in the Peneda-Gerês Park’s Management Plan.
Description
Keywords
Light pollution Mainland Portugal
Citation
Lima, R. (2019, junho 26). Testing a cloudless model of light pollution propagation on two dark sky regions in Portugal. LPTMM conference 2019.
Publisher
IP Porto