Mathematics – Logic
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.8891f&link_type=abstract
Journal of Geophysical Research, Volume 98, Issue D5, p. 8891-8897
Mathematics
Logic
21
Atmospheric Composition And Structure: Transmission And Scattering Of Radiation, Meteorology And Atmospheric Dynamics: Radiative Processes, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry
Scientific paper
A nearly continuous data set of solar ultraviolet spectra irradiance exists for Ushuaia, Argentina, latitude 54°59' S, over the period from mid-September 1990 to mid-March 1991. This includes a season of prolonged depletion in column ozone over Antarctica, 10° or more in latitude poleward of Ushuaia. Cloudiness provides a major source of variance in the measurements. When this influence is removed, the irradiances at wavelengths between 300 and 310 nm are enhanced relative to clear sky calculations based on a 10-year ozone climatology. During December the average noontime irradiance at 306.5 nm, which is a good proxy for erythemal irradiance, is 45% larger than the zonal mean climatological prediction. The largest noontime radiation levels observed at Ushuaia are equivalent to moving 20° in latitude closer to the equator at the summer solstice.
Booth Rocky C.
Diaz Susana B.
Frederick John E.
Lucas Thomas
Neuschuler David
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