Sky type classification in Central England during winter

Sky luminance distribution in the North of Iberian Peninsula during winter

“…2 shows graphically the most significant results of Tables 3 and 4. By observing Table 4, it can be pointed out that overcast skies prevail in Pamplona in the winter period, with a frequency of 39.25% very closely followed by clear skies (36.37%), whereas the partly cloudy cases are the least frequent with 24.38%. Markou et al (2004) in South England and Bartzokas et al (2003b) in Bratislava also observed that in winter the most frequent sky types were the overcast skies and the less frequent the partly cloudy skies but, in contrast to what was observed in Pamplona, the percentage of overcast skies was significantly higher than the one of clear skies. Specifically, as shown in Table 3, sky type V.5 (cloudless polluted with a broad solar corona) is the most frequent case (20.98%), followed by sky type I.1 (overcast CIE standard, with steep gradation and with azimuthal uniformity) with 14.86%.…”

“…Related published works are centred on a reduced number of locations such as Sheffield and Garston in Central and South England (Tregenza, 1999;Markou et al, 2004Markou et al, , 2005, Bratislava and Athens (Bartzokas et al, 2003a(Bartzokas et al, , 2003b, Hong Kong (Li et al, 2003), Bangkok (Chaiwiwatworakul and Chirarattananon, 2004), Singapore (Tregenza, 1999;Wittkopf and Soon, 2007) and Fukuoka (Tregenza, 1999). Furthermore, some of them are centred on a specific season: the summer period (Bartzokas et al, 2003a) or the winter period (Bartzokas et al, 2003b andMarkou et al, 2004). Torres et al (2010) studied the sky luminance distribution in Pamplona during the summer period.…”

A review of daylight illuminance determinations and energy implications

“…The combinations can form a large number of skies but only 15 relevant types were selected for the standard set. Investigations of the standard sky luminance patterns have been conducted under various climatological and geographical locations [86]. Each sky standard represents by a unique sky luminance pattern and the corresponding climatic parameters and indices should be within certain ranges.…”

Sky luminance distribution in Pamplona (Spain) during the summer period

“…Related published work are centred on a reduced number of locations such as Sheffield and Garston in Central and South England (Tregenza, 1999;Markou et al, 2004Markou et al, , 2005, Bratislava and Athens (Bartzokas et al, 2003a(Bartzokas et al, , 2004b, Hong Kong (Li et al, 2003), Bangkok (Chaiwiwatworakul and Chirarattananon, 2004), Singapore (Tregenza, 1999;Wittkopf and Soon, 2007) and Fukuoka (Tregenza, 1999). Furthermore, some of them are centred on a specific season: summer period (Bartzokas et al, 2003a) or winter period (Bartzokas et al, 2004b;Markou et al, 2004).…”