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Intercomparison of total ozone measured at low sun angles by the Brewer and Dobson spectrophotometers at Scott Base, Antarctica
Author(s) -
Nichol S. E.,
Valenti C.
Publication year - 1993
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl02345
Subject(s) - total ozone mapping spectrometer , ozone , environmental science , ozone depletion , atmospheric sciences , latitude , meteorology , ozone layer , physics , geology , geodesy
The total ozone measurements made at Scott Base (78°S, 167°E) with Dobson spectrophotometer #17 and Brewer spectrophotometer #50 during the 1991 Antarctic ozone hole season are compared. Due to the high latitude of Scott Base, these measurements have been made using low‐sun measurement techniques, which are considered to be less reliable and less accurate. The differences between the quasi‐simultaneous total ozone measurements, and the mean daily total ozone values, from Dobson instrument 17 and Brewer instrument 50 are generally between ±5%. The Dobson‐Brewer differences can, on occasions, be as great as 10% for measurements made at airmass values between 5 and 6. The Dobson and Brewer ozone data are generally within ±5% of the Total Ozone Mapping Spectrometer (TOMS) value.