Surface ultraviolet radiation over east Siberia: seasonal variations

Details Surface ultraviolet radiation over east Siberia: seasonal variations Surface ultraviolet radiation over east Siberia: seasonal variations

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002angeo..20..559m&link_type=abstract

Annales Geophysicae, vol. 20, Issue 4, pp.559-564

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Scientific paper

The results of spectral measurements of the daily near-noon surface direct solar ultraviolet radiation in the wavelength range of 295 345 nm obtained in Irkutsk (East Siberia) for the time interval of 1998 2000 are presented. For the period under consideration, the seasonal UV radiation variations are analysed that are associated with the total ozone dynamics, the transition of cyclonic and anticyclonic (Siberian anticyclone) periods, the presence of snow cover, and other factors. The analysis reveals an asymmetric behaviour of the seasonal course in ground-level UV radiation around the time of the summer solstice, with seasonal variation dependence on the wavelength. We have determined the irregular variations of surface UV radiation that is typical for the region, with their properties dependent on the season and on the spectral range analysed. The similarity of the above noted features from year to year was revealed.

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