6533b85efe1ef96bd12bfb91
RESEARCH PRODUCT
Correlation between relative sunshine and state of the sky
G. CannataS. CoppolinoC. LeoneE. SinagraS. Barbarosubject
CorrelationInsolationSunlightOvercastMeteorologyRenewable Energy Sustainability and the EnvironmentSkyCloud covermedia_common.quotation_subjectEnvironmental scienceGeneral Materials ScienceState (functional analysis)media_commondescription
Abstract It is possible to construct a sunshine map referring to a large zone, lacking in a widespread network of recording stations, correlating the relative sunshine with the “state of the sky”, defined by the monthly mean number of the clear, mixed and overcast days, whose data are more largely available. In the correlation here proposed climatological and meteorological factors are introduced in order to express the helioclimatic characteristics of every location. The application to Italy, using the data of the period 1973–1977 provided by the 31 stations of ITAV, has suggested the classification of these stations in seven “helioclimatic groups” characterized by different values of the above factors, mainly representative of the position and typology of the surrounding surfaces and of the atmospheric transparence in a cloudy or cloudless sky. The positive results of the comparison between the experimental and computed relative sunshine values are shown in the tables.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1981-01-01 | Solar Energy |