Beziehungen zwischen den kurzwelligen Strahlungskomponenten auf die horizontale Fläche und der Bewölkung an ausgewählten Stationen in Österreich

Abstract

ZusammenfassungAusgehend yon den Tagessummen der Globalstrahlung G auf die horizontale Fl~iche und den Tagesmitteln der Bew61kungsmenge B werden nach der Methode der kleinsten Quadrate t0r die vier Stationen Wien, Salzburg, Klagenfurt und Sonnblick die linearen und quadratischen Regressionen zwischen G/Go undB bestimmt (Go = extraterrestrische were evaluated. In the verification it is shown, that for the mean conditions by these regressions the daily sums of global radiation, sky radiation and direct sun radiation can be estimated in satisfying manner from cloudiness. Interesting insights in the radiation climatology of Austria are given by statistical analysis of the daily ratios H/G, DIG and G/Go.

Distributed Snowmelt Simulations in an Alpine Catchment: 1. Model Evaluation on the Basis of Snow Cover Patterns

“…Kfihtai is divided into a diffuse and a direct component on the basis of cloudiness [Neuwirth, 1982]. The separation is based on a linear relation between the ratio of diffuse to global radiation and cloudiness, which is adjusted with data from overcast days and from clear sky days before sunrise (assuming 100% diffuse radiation in both cases).…”

Calculation of direct solar and diffuse radiation in Israel

“…The radiation data of the meteorological stations in Bet-Dagan, Jerusalem, Beer Sheva, Sedom and Eilat were analysed with the aim of developing a statistical model, which would enable the calculation of these data. General parameterizations of radiation components can be found in Liu and Jordan (1960), Dirmhirn (1964), Kondratyev (1969), Paltridge and Platt (1976), Kasten (1980), Neuwirth (1982), Karalis et al (1982), Lyons and Edwards (1982), Davies et al (1988), McKay (1985, 1988), Kasten (1989), Sinn (1983), McCartney (1976), Sahsamonoglou and Makrogiannis (1991). The calculations of this study are based on the approach of Kasten (1989); however, the turbidity factors have been determined empirically from the measured radiation data during clear sky periods.…”