Results 211 to 220 of about 13,485 (254)

Solar radiation and the duration of sunshine

Quarterly Journal of the Royal Meteorological Society, 1954
AbstractRecords of solar radiation (Q) and of duration of sunshine (n) on a monthly basis have been collected for 32 stations and regression equations relating the data calculated in the form Q = QA (a+bn/N) where QA is the maximum possible radiation in the absence of an atmosphere, and N is the maximum possible duration of bright sunshine. For five of
J. N. Black, C. W. Bonython, J. A. Prescott   +2 more
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Sunshine duration in Poland from ground‐ and satellite‐based data

International Journal of Climatology, 2020
AbstractThe aim of the study is to characterise the spatial variability of sunshine duration in Poland. The study used ground‐based and satellite‐based data from 1983 to 2018 multi‐annual period, from the territory of Poland. The ground‐based data include daily sums of sunshine duration from 29 Institute of Meteorology and Water Management—National ...
Dorota Matuszko, Krzysztof Bartoszek, Jakub Soroka, Stanisław Węglarczyk   +3 more
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Cloudiness and sunshine duration measurements in the U.A.R.

pure and applied geophysics, 1964
Seasonal variations of cloudiness have been studied for the different zones of the United Arab Republic. It was found to be very low and to decrease more towards lower latitudes.
M. K. Elnesr, A. F. El-Sabban
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A sunshine monitor for automatic registration of sunshine duration

Archives for Meteorology, Geophysics, and Bioclimatology Series B, 1981
A sunshine monitor and its calibration is described. Its important characteristics are: it has an electrical DC level output which is high (> 4.5 V) for “sunshine” and low (< 0.4 V) for “no sunshine”; it is calibrated for a threshold sensitivity of 200 W/m2, which meets the sunshine definition of the World Meteorological Organization; it requires very ...
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Influence of cloudiness on sunshine duration

International Journal of Climatology, 2011
AbstractThis paper analyzes the influence of cloudiness and cloud genera on sunshine duration based on a very long (1884–2007) homogeneous daily nephological and sunshine duration data series for the City of Krakow. Quadratic regression was used to describe the relationship between sunshine duration and cloudiness.
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Homogenized Sunshine duration data for the Austrian domain

2022
&lt;p&gt;The measurement of sunshine duration has experienced a number of changes since the operational observation by the national meteorological service ZAMG in Austria. With the automatization of the stations the Campbell-Stokes sunshine recorders were replaced by Haenni Solar 111 instruments and later partly with Meteoservice SD6.
Barbara Chimani, Anita Paul, Marc Olefs, Klaus Haslinger, Anna-Maria Tilg   +4 more
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Estimation of sunshine duration in Saudi Arabia

Journal of Renewable and Sustainable Energy, 2013
In this paper we propose machine learning algorithms to estimate the sunshine duration at any region in Saudi Arabia using easily obtained parameters that include: maximum possible day length (So), extraterrestrial solar radiation at that particular location (Ho), latitude, longitude, altitude, and month number.
Mohamed A. Mohandes, Shafiqur Rehman
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On the variations of sunshine duration in Austria

Theoretical and Applied Climatology, 1992
The seasonal and annual duration of sunshine in Austria during the 30 year period 1960–1989 is analyzed and the trends during this time interval are mapped. It is shown that sunshine decreased in the northern and eastern parts of Austria. In the mountain regions only small changes can be seen but there is some evidence that in the high mountain regions
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On correlating the relative sunshine duration with the state of the sky

Solar & Wind Technology, 1990
Abstract The state of the sky defined in terms of the cloud cover has been correlated with bright sunshine duration using data from five meteorological stations in Bangladesh. The r.m.s. errors of computed sunshine duration using the correlation are 2 to 5% for these stations.
M. Hussain, D. Siddique
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INSOLATION AS AN EMPIRICAL FUNCTION OF DAILY SUNSHINE DURATION

Monthly Weather Review, 1954
Abstract Empirical relations between incident solar radiation received at the earth's surface and (1) percent of possible sunshine, (2) latitude, and (3) time of year are developed. These relations are combined into a graphical method for converting percent of possible sunshine into daily values of incident solar radiation for stations between ...
RUSSELL W. HAMON, LEONARD L. WEISS, WALTER T. WILSON   +2 more
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