Solar UV-radiation monitoring 1996.

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


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 repor!, Josefsson (l 996) 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 U V-radiation in this presentation is C!E-weighted irradiance expressed as MED (minimum erythemal dose), where one MED equals 2!0 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 toas 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-recorcl with concurrent records of the total ozone a small study of the anticorrelation of these two atmospheric parameters is illustratecl. 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.