Atmospheric O is measured in Dobson units 1 unit 2 69 x 1016

Last updated: 6/28/2023

Atmospheric O is measured in Dobson units 1 unit 2 69 x 1016 molecules O above each squared centimeter of Earth s surface Dobson thickness in hundredths of a millimeter that the O column would occupy if it were compressed to I atm at 0 C The graph shows variations in ozone concentration as a function of latitude and season Using an absorption cross section of 2 5 x 10 19 cm calculate the transmittance in the winter and the summer at 30 50 N latitude at which 0 varies from 290 to 350 Dobson units Twinter Tsummer Total ozone Dobson units 380 350 320 290 260 230 1989 1990 1991 30 N 50 N 10 N 30 N 10 N 10 S By what percentage is the ultraviolet transmittance greater in winter than in summer 1992 1993 Year Harris Lucy Quantitative Chemical Analysis 10e 2020 W H Freeman and Company Variation in atmospheric ozone at different latitudes Data from P S Zurer Chem Eng News 24 May 1993 p 8