Physics – Geophysics
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.1359r&link_type=abstract
Geophysical Research Letters, Volume 24, Issue 11, p. 1359-1362
Physics
Geophysics
6
History Of Geophysics: Atmospheric Sciences, Planetology: Comets And Small Bodies: Radiation And Spectra, Meteorology And Atmospheric Dynamics: Radiative Processes, Mineral Physics: Instruments And Techniques
Scientific paper
Measurements were carried out on Tibetan Plateau (Lhasa, 3648 m above sea level) with a multi-channel moderate bandwidth filter instrument during the period from June 24. to November 30., 1996. The analysis of preliminary data shows that hourly mean CIE-weighted biologically effective UV dose rate at local noon can reach to as high as 390.5mW/m2. The corresponding average value was 225.4mW/m2; Due to the combined effect of cloud cover variation with ozone variation, the increasing trend of this UV dose rate exists during this period of measurements. The relation between the ratio of irradiance close to noon at 340nm to that at 305nm and total ozone column shows that the variation of total ozone column may also cause the variation of UV radiation. In addition, the UV dose rate in the morning is slightly higher than that at afternoon with same solar zenith angle.
Gjessing Yngvar
Ren B. C. P.
Sigernes Fred
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