Solar UV-radiation monitoring 1996.

Typ: Rapport
Serie: RMK 74
Författare: Josefsson, Weine


Measurements of solar UV-racliation in a small Sweclish network are presented for 1996. this report can be regarded as a supplement to a previous report, Josefsson (l996) where the results of the previous five years were reported, and where details not presented in this small repor! can be found. The quantity ancl unit of the UV-radiation in this presentation is CIE-weighted irradiance expressed as MED (minimum erythemal dose), where one MED equals 210 Jm-2. The values have been recomputed to refer to the international intercomparison of broad-band meters at Helsinki in 1995. In the following referred to as the WMO-STUK 1995 scale.

Although, the stratospheric ozone was severely depleted during the early parts of 1996, the yearly UV radiation recorded was slightly less than in previous years. This was mainly due to the very cloudy months of May, June and July.

By combining the UV-record with concurrent records of the total ozone a small study of the anticorrelation of these two atmospheric parameters is illustrated. There are many sources of error and detailed studies are prevented by the !arge uncertainty connected with these data of UV-irradiance. Due to the short period of the record and the low accuracy no attempt to study trends is done.