Results 221 to 230 of about 13,485 (254)

Estimation of Global Solar Radiation by Means of Sunshine Duration

2008
2631
Luis, Mazorra Aguiar, Felipe, Díaz Reyes, Pilar, Navarro Rivero   +2 more
openaire   +2 more sources

Sunshine duration hours over the Greek region

Theoretical and Applied Climatology, 2005
In this study, the temporal and spatial distribution of bright sunshine hours and relative sunshine duration over Greece are presented. The datasets used for this study were obtained from the archives of the Hellenic National Meteorological Service (HNMS).
Matzarakis, Andreas, Katsoulis, V. D.
openaire   +2 more sources

Correlating beam radiation with sunshine duration

Solar Energy, 1992
For seven locations in north and central India, monthly averaged data of daily beam irradiation on a horizontal surface, I, have been correlated with bright sunshine duration, s, using the relation (I/I{sub o}) = b{sub o}(s/S{prime}) where I{sub o} is the monthly mean value of extraterrestrial irradiation over a day, S{prime} is the corresponding ...
openaire   +1 more source

Stochastic models for sunshine duration and solar irradiation

Renewable Energy, 2002
Harmonic analysis of sunshine duration and solar irradiation measured at Sebele, Botswana is carried out. The data used consists of the monthly averages and the Julian-days averages of sunshine duration and solar irradiation sequences. This study involves splitting the time series into deterministic and stochastic components, and determining the ...
P.K. Jain, E.M. Lungu
openaire   +1 more source

Regression Analysis of Solar Radiation and Sunshine Duration

Architectural Science Review, 1996
Regression techniques have been used to investigate the correlations of monthly-average-daily and monthly-average-hourly global, direct and diffuse radiation with bright sunshine hours for Hong Kong. Measured data during the 15-year period from 1979 to 1993 have been used for this study.
Joseph C. Lam, Danny H.W. Li
openaire   +1 more source

Terrestrial irradiation–sunshine duration clustering and prediction

Energy Conversion and Management, 2003
Abstract The relationship between terrestrial irradiance and sunshine duration is not crisp and there are scatters around a general trend, which most often is expressed to occur in the form of a linear expression. This study presents a way of grouping the solar irradiation–sunshine duration data into convenient seasonal subgroups and then makes ...
Zekai Şen, Ahmet Öztopal
openaire   +1 more source

Solar radiation and sunshine duration in East Asia

Archives for Meteorology, Geophysics, and Bioclimatology Series B, 1981
The relationship between solar radiation and sunshine duration is studied for 132 stations in East Asia. Regression coefficientsa andb in the modified Angstrom formulaQ/Qa = a + b n/N are found to be systematically distributed in the area with low values ofa and high values ofb in the winter maximum/summer minimum regime ofQ/Qa andn/N, and high values ...
openaire   +1 more source

Sunshine duration and daily courses of illuminance in Bratislava

International Journal of Climatology, 2004
AbstractThe occurrences of typical sky conditions during overcast days are close to the CIE Overcast Sky Standard in the Bratislava area; their variation is specified by the diffuse coefficient kdd = Dv/Ev where Dv is the horizontal diffuse illuminance and Ev is the extraterrestrial illuminance.
Stanislav Darula, Richard Kittler
openaire   +1 more source

Sunshine duration study within the Mediterranean area

Theoretical and Applied Climatology, 1991
The data information of sunshine duration for two different areas on the northern Mediterranean coast are examined. The data concern the same ten years (1968–77) time period, for both areas.
openaire   +1 more source

Trends in sunshine duration in Poland (1971–2018)

International Journal of Climatology, 2021
Krzysztof Bartoszek, Stanisław Weglarczyk, Dorota Matuszko   +2 more
exaly