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On changes of spectral UV-B in the 90's in Europe

dc.contributor.authorZerefos, C.S.
dc.contributor.authorMeleti, C.
dc.contributor.authorBalis, D.S.
dc.contributor.authorBais, A.F.
dc.contributor.authorGillotay, D.
dc.date2000
dc.date.accessioned2017-05-05T12:33:42Z
dc.date.available2017-05-05T12:33:42Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/5332
dc.descriptionThe variability of solar irradiance in the UV-B spectral region is studied at two European stations, Thessaloniki, Greece (40.5°N) and Uccle, Belgium (50.8°N), operating well calibrated spectroradiometers during the period 1990-97, which is the longest available clear sky time series of spectral UV-B data. Solar spectral irradiance at two distinct wavelenghts is used in the presented analysis, the strongly ozone dependent 305nm and the weakly dependent 325nm. It is quantified in this study to what extend total ozone is controlling long-term changes of solar irradiance below 315nm at ground level. This is supported by the similar long-term variability under clear sky and all sky conditions during the past seven years. It was found that the increase in UV-B solar irradiance, which can be attributed solely to the observed ozone decrease of 4.5% per decade, is of the order of 10% per decade at 305nm, 63° SZA. The increase found at 325 nm is associated with the observed decreases of various air pollutants in the area, as it appears from the long-term columnar SO2 measurements. The observed changes in solar irradiance (in % per year) are verified with model calculations performed with a radiative transfer model.
dc.languageeng
dc.titleOn changes of spectral UV-B in the 90's in Europe
dc.typeArticle
dc.subject.frascatiEarth and related Environmental sciences
dc.audienceScientific
dc.subject.freeIrradiation
dc.subject.freeOzone
dc.subject.freeSolar energy
dc.subject.freeUltraviolet radiation
dc.subject.freeSolar irradiances
dc.subject.freeSpace research
dc.subject.freeirradiance
dc.subject.freeozone
dc.subject.freespectrometer
dc.subject.freeultraviolet B radiation
dc.subject.freeEurope
dc.source.titleAdvances in Space Research
dc.source.volume26
dc.source.issue12
dc.source.page1971-1978
Orfeo.peerreviewedYes
dc.identifier.doi10.1016/S0273-1177(00)00167-8
dc.identifier.scopus2-s2.0-0034439581


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