GEOGRAFSKI INFORMACIJSKI SISTEMI V SLOVENIJI 2005–2006

PROSTORSKA PORAZDELITEV TRAJANJASON^NEGA OBSEVANJAMojca DolinarAgencija Republike Slovenije za okoljeVojkova cesta 1B, 1000 Ljubljanam.dolinar@gov.siGIS v Sloveniji 2005–2006, 61–71, Ljubljana 2006UDK: 551.521:528.94(497.4)659.2:004:91IZVLE^EKProstorska porazdelitev trajanja son~nega obsevanjaGlavni namen predstavljene {tudije je izra~un prostorske porazdelitve trajanja son~nega obsevanja v referen~nemobdobju 1971–2000. Trajanje son~nega obsevanja se zaradi ovir precej skraj{a. Ker se vpliv ovirspremeni `e ob majhnem prostorskem premiku, smo trajanje prera~unali na matemati~ni horizont. Takosmo na kartah prikazali le klimatolo{ke zna~ilnosti trajanja son~nega obsevanja, medtem ko vpliv ovir dodatnoocenimo za vsako lokacijo posebej. Prostorski vzorec trajanja son~nega obsevanja se med sezonskim ciklomobrne, zaradi ~esar se zna~ilen prostorski vzorec na letni ravni zabri{e. Zato smo prostorsko porazdelitevtrajanja son~nega obsevanja ra~unali po letnih ~asih. Interpolacijski model je kombinacija multivariatnegaregresijskega modela, kriginga in enostavnih matemati~nih modelov. Za vsak letni ~as smo narediliregionalizacijo Slovenije glede na zna~ilnosti trajanja son~nega obsevanja in za vsako regijo posebej dolo-~ili interpolacijski model. Kon~ne karte so izra~unane na sezonski ravni z lo~ljivostjo 1 km.KLJU^NE BESEDEtrajanje son~nega obsevanja, prostorska interpolacija, kriging, klimatske karte, digitalni model reliefa, geografskiinformacijski sistemABSTRACTSpatial interpolation of sunshine durationThe objective of present study is the calculation of spatial distribution of sunshine duration for the territoryof Slovenia. Four maps in 1km resolution are prepared to present spatial distribution of sunshine durationfor winter, spring, summer and autumn. The values on all four maps are 30-year mean seasonal sunshineduration, calculated from measurements on 43 meteorological stations in the reference period 1971–2000.The seasonal presentation is chosen due to high inter-seasonal variability in spatial distribution of sunshineduration. The values on the maps are calculated on a mathematical horizon, to avoid the influenceof geographical, urban and vegetation obstacles. The interpolation model is a combination of multivariateregression model, residual kriging and simple mathematical models. Geographical variables (altitude,latitude and longitude) are used in models to explain the spatial variability of sunshine duration. For eachseason, regionalisation is preformed, based on sunshine duration data, derived geographical data andradio-sounding data. The interpolation models are developed for every region separately and afterwardsthe calculated layers are merged using GIS techniques.KEYWORDSsunshine duration, spatial interpolation, kriging, climatological maps, digital terrain model, geographicalinformation system61