MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH JANUARY YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 24.8 22.6 22.9 20.1 19.1 19.1 20.0 20.6 19.7 20.1 20.5 18.6 16.8 18.7 16.6 21.5 29.3 26.5 20.5 26.3 27.4 28.5 30.7 31.7 22.6 31.7 2 29.6 24.7 25.7 24.9 26.7 25.3 26.4 27.6 24.2 23.9 23.9 24.5 24.9 25.2 24.6 24.8 23.9 24.2 24.2 24.8 27.4 27.1 27.3 32.9 25.8 32.9 3 31.9 35.6 33.6 33.0 31.2 32.1 31.7 31.4 32.0 32.2 30.9 29.3 23.9 19.8 16.8 15.9 16.8 15.9 15.5 14.8 14.8 14.4 14.4 14.6 24.3 35.6 4 15.2 15.0 15.4 14.6 15.4 15.2 15.4 15.8 15.6 15.8 16.0 16.0 16.3 16.3 16.5 16.3 16.5 16.7 16.5 16.7 16.2 16.2 15.8 15.1 15.9 16.7 5 15.8 15.1 17.2 17.7 17.9 18.6 19.4 20.5 20.7 21.2 21.4 21.9 21.7 21.0 20.8 19.7 19.1 18.9 18.0 18.6 18.4 18.7 19.5 20.1 19.2 21.9 6 20.4 21.2 22.1 21.7 22.0 22.8 22.8 25.8 28.8 31.2 32.2 31.8 30.9 30.7 30.5 30.1 30.5 28.8 26.6 25.3 25.1 24.9 24.7 24.2 26.5 32.2 7 24.0 22.7 21.8 20.9 21.8 22.7 22.9 21.6 21.0 18.8 19.0 18.8 19.6 21.0 20.3 21.4 24.3 23.8 24.2 24.0 24.9 24.5 24.9 24.9 22.2 24.9 8 24.0 24.0 24.0 24.0 22.8 22.7 22.3 22.1 21.9 22.1 22.3 22.7 22.2 19.4 18.3 17.4 19.8 18.5 17.2 16.8 15.7 16.0 18.5 18.3 20.6 24.0 9 17.9 16.8 17.2 17.4 17.0 17.0 17.0 16.6 16.1 16.4 16.4 21.7 21.3 17.3 16.2 17.8 16.9 17.1 17.4 17.4 21.1 19.3 19.3 18.7 17.8 21.7 10 17.8 17.6 17.6 17.6 17.6 18.3 17.2 17.9 18.1 17.5 17.7 17.9 18.1 18.1 19.2 19.2 19.9 19.7 20.1 19.3 19.5 19.7 20.4 20.0 18.6 20.4 11 19.5 19.8 20.0 20.7 20.3 19.3 19.0 18.0 19.1 19.3 19.5 19.0 19.5 19.0 19.0 19.1 19.1 19.1 19.1 19.6 19.8 19.8 19.6 20.1 19.4 20.7 12 21.1 20.1 19.0 20.1 20.1 24.4 27.7 24.4 24.5 21.2 17.0 17.0 19.1 21.3 23.4 24.5 25.6 27.8 29.9 31.0 30.0 30.0 30.0 31.1 24.2 31.1 13 31.1 28.9 22.5 20.4 19.3 19.3 19.3 19.3 20.4 22.6 23.7 25.8 24.8 24.8 25.9 26.9 25.9 25.9 24.8 23.8 23.8 24.9 25.9 27.0 24.0 31.1 14 29.2 29.2 28.1 28.2 27.1 26.0 25.0 22.8 22.8 21.8 21.8 21.8 21.8 22.9 22.9 22.9 22.9 19.7 18.6 17.6 17.6 16.5 17.6 17.6 22.6 29.2 15 17.6 17.6 18.6 18.6 19.7 18.6 18.6 17.5 17.5 17.5 18.6 17.5 17.5 17.5 16.4 16.4 16.4 17.4 17.4 17.4 17.4 17.4 17.4 17.4 17.7 19.7 16 16.3 17.4 19.5 20.6 22.7 26.0 27.0 27.0 27.0 27.0 28.1 28.1 28.1 28.1 27.0 27.0 25.9 24.8 23.7 22.6 22.6 21.5 21.5 21.5 24.2 28.1 17 21.5 21.5 21.5 21.5 21.5 22.5 23.6 20.4 18.2 16.0 17.1 16.0 16.0 16.0 16.0 17.1 17.1 17.1 17.1 17.0 17.0 17.0 17.0 15.9 18.4 23.6 18 15.9 15.9 17.0 17.0 17.0 17.0 15.9 15.9 15.9 15.9 14.8 14.8 15.8 15.8 18.0 22.3 24.4 24.4 25.5 25.5 25.5 25.5 25.5 25.5 19.4 25.5 19 24.5 22.4 22.4 21.5 20.8 20.6 20.2 20.6 21.7 22.1 22.3 22.5 22.2 22.2 23.0 24.6 25.2 22.9 23.5 25.0999.9999.9999.9999.9 22.5 25.2 20 999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9 21 999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9 22 999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9 23 999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9 24 999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9 16.2 16.5 16.4 16.7999.9999.9 25 15.6 15.1 15.6 16.3 16.2 16.4 16.4 16.4 16.6 16.0 16.4 16.4 15.5 15.8 16.0 16.2 16.6 16.0 16.6 18.4 18.1 17.4 17.5 17.2 16.5 18.4 26 17.4 16.5 16.3 15.8 15.9 15.6 15.8 16.9 17.3 17.1 16.7 16.6 16.4 15.8 15.7 16.0 15.3 15.7 15.9 14.8 15.5 15.0 15.9 16.8 16.1 17.4 27 16.3 16.4 16.9 16.7 16.9 16.9 17.3 18.0 18.0 18.2 18.3 19.2 19.0 19.8 20.5 22.2 26.1 27.0 26.7 25.9 24.5 23.0 22.0 22.2 20.3 27.0 28 22.0 22.3 22.0 22.3 22.2 22.4 22.8 22.7 22.7 23.8 23.8 23.8 23.9 22.8 23.9 23.9 22.8 22.8 22.9 24.0 23.8 25.1 24.8 24.0 23.2 25.1 29 23.4 23.1 23.9 24.6 24.6 24.8 24.7 24.3 24.1 24.0 23.6 23.1 24.0 23.6 23.6 23.6 24.2 23.8 24.0 24.0 24.4 24.2 23.5 23.7 23.9 24.8 30 23.7 24.1 24.3 25.0 24.8 23.9 24.1 24.5 24.5 23.9 23.8 23.6 21.4 19.8 21.8 22.3 20.5 18.5 19.4 20.0 22.0 23.6 23.6 23.4 22.8 25.0 31 24.3 25.1 24.8 25.3 25.8 26.2 26.2 25.0 23.9 24.4 24.0 23.7 23.1 22.0 21.6 20.9 20.7 20.5 20.0 20.0 20.0 19.4 19.1 20.2 22.8 26.2 MEAN 21.6 21.2 21.2 21.0 21.0 21.3 21.5 21.3 21.2 21.1 21.1 21.2 20.9 20.6 20.6 21.1 21.8 21.3 21.0 21.2 21.1 21.0 21.3 21.6 21.2 25.4 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH FEBRUARY YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 19.9 20.8 21.0 21.7 21.7 22.2 21.9 21.7 21.7 21.7 21.0 20.7 20.3 19.6 19.2 18.7 18.7 19.3 19.3 19.7 20.0 20.2 19.9 20.1 20.5 22.2 2 19.9 20.1 20.1 20.1 19.9 20.3 19.8 19.8 19.8 20.0 20.0 20.0 20.2 20.4 20.1 20.6 20.8 21.0 21.4 21.4 21.8 20.7 19.2 19.4 20.3 21.8 3 18.9 18.7 18.3999.9999.9 18.7 18.7 18.7 18.7 18.7 17.6 17.6 17.6 17.6 17.6 17.6 18.7 17.6 17.6 17.8 16.9 16.9 16.7 16.7 17.9 18.9 4 16.9 16.7 17.2 17.0 16.6 16.2 16.2 16.2 15.9 16.1 16.5 17.4 17.4 17.8 18.7 18.4 18.6 19.1 19.2 19.7 19.6 19.8 19.8 20.3 17.8 20.3 5 20.1 19.9 20.3 20.7 20.4 20.8 21.0 21.4 21.4 22.1 21.9 22.4 22.6 22.6 20.8 21.3 21.7 21.1 20.2 19.3 18.5 18.7 16.4 17.0 20.5 22.6 6 16.6 16.4 16.1 15.3 17.3999.9999.9 14.9 14.8 15.2 15.7 15.1 15.1 14.7 14.9 15.2 15.0 15.6 15.7 15.5 15.9 15.7 15.7 15.5 15.5 17.3 7 15.7 15.6 16.0 16.3 16.4 16.8 17.9 18.1 18.4 19.5 20.4 21.0 21.2 21.5 21.9 21.9 22.0 21.5 22.2 21.6 21.2 20.9 20.7 20.7 19.6 22.2 8 20.3 18.1 16.2 15.6 14.1 13.2 12.8 13.0 13.2 13.4 13.2 13.0 13.1 12.9 12.9 13.2 13.0 13.9 14.4 13.8 14.2 15.6 15.9 17.4 14.4 20.3 9 18.8 19.9 23.3 21.1 21.4 20.5 20.3 20.4 20.2 20.2 20.2 20.4 20.4 20.0 20.5 19.9 19.4 19.5 18.4 18.5 18.6 18.2 18.8 18.6 19.9 23.3 10 18.9 18.5 18.5 19.2 19.0 19.7 19.7 20.2 19.7 19.8 18.6 17.3 15.3 14.4 14.9 15.1 15.8 16.5 16.7 16.9 16.9 16.7 16.7 15.9 17.5 20.2 11 15.7 17.5 17.9 18.2 19.4 19.2 19.2 19.4 18.9 17.7 17.0 16.5 16.4 16.6 16.4 15.1 15.1 14.4 17.8 16.0 19.1 18.2 17.5 17.9 17.4 19.4 12 17.6 17.6 18.0 18.5 17.8 18.0 17.5 17.3 16.6 17.0 16.1 16.3 15.8 15.8 16.5 15.5 14.9 17.2 19.0 19.2 19.4 19.9 19.8 19.8 17.5 19.9 13 19.8 19.7 19.7 19.7 19.8 20.0 19.7 20.3 20.5 21.0 21.4 21.8 21.3 21.5 21.7 21.7 21.9 21.0 20.9 20.7 20.9 20.9 20.8 21.0 20.7 21.9 14 21.4 21.4 21.2 21.6 21.6 21.6 21.1 21.1 20.8 21.0 21.4 21.4 21.4 21.5 21.3 21.0 21.2 20.8 20.7 20.7 20.7 20.4 20.2 20.4 21.1 21.6 15 19.9 20.1 20.1 20.3 20.5 20.0 19.8 20.2 19.7 19.9 19.4 19.6 19.1 18.9 18.6 17.9 18.1 17.6 17.0 16.9 17.3 17.3 17.5 17.9 18.9 20.5 16 17.7 17.7 17.9 17.9 17.7 17.6 17.8 17.8 17.7 17.9 18.4 18.5 18.7 18.9 18.7 18.5 18.4 18.8 18.6 19.0 19.0 18.3 18.5 18.4 18.3 19.0 17 18.7 18.4 18.6 18.6 18.9 18.8 19.0 18.5 18.5 18.4 18.2 18.6 18.4 18.8 19.0 18.1 18.7 18.9 18.7 18.4 18.6 18.6 18.3 18.6 18.6 19.0 18 18.8 18.9 19.1 18.9 18.6 18.3 17.6 16.2 15.0 14.8 14.6 15.2 15.0 15.1 14.7 14.2 14.4 14.4 14.1 13.1 13.2 14.0 14.3 14.3 15.7 19.1 19 13.8 12.7 13.0 13.7 13.0 13.2 13.9 15.0 15.7 16.2 16.4 16.4 16.8 16.6 17.1 17.5 17.3 17.3 17.3 17.3 16.9 16.4 16.2 16.2 15.7 17.5 20 15.7 15.1 15.3 14.9 14.2 14.5 14.7 15.6 16.5 16.7 16.9 17.8 17.8 18.5 18.5 18.3 18.1 17.9 17.8 17.8 17.6 17.4 17.5 17.5 16.8 18.5 21 17.0 16.2 16.2 16.2 15.6 15.7 15.7 16.0 15.3 15.1 15.1 14.8 14.6 15.3 15.7 16.4 16.7 17.3 17.1 17.3 17.1 17.3 16.8 16.6 16.1 17.3 22 17.0 16.6 16.8 16.4 16.4 16.2 15.7 15.5 15.3 15.0 15.3 15.5 15.3 15.8 15.1 15.1 15.3 15.3 16.1 16.1 16.8 16.8 16.5 16.1 15.9 17.0 23 16.5 16.3 16.5 16.8 16.2 16.6 17.0 16.8 16.6 17.4 17.2 17.0 17.2 17.4 16.8 16.7 16.4 16.3 16.1 16.1 16.3 16.6 16.3 16.1 16.6 17.4 24 16.1 16.4 16.6 16.6 16.8 16.6 15.3 15.3 15.7 15.4 15.2 15.2 15.0 15.2 14.8 14.8 14.6 14.4 14.6 15.0 15.2 16.2 16.4 16.6 15.6 16.8 25 16.6 16.8 17.8 17.3 17.3 17.5 17.8 17.5 17.7 17.3 17.0 17.2 17.4 17.0 17.2 17.2 16.8 16.3 15.9 15.6 15.2 15.6 15.4 15.8 16.8 17.8 26 16.0 16.8 16.6 16.6 16.2 16.4 16.8 16.2 16.1 16.2 16.2 15.7 15.3 14.7 14.4 14.7 14.7 14.9 14.5 14.8 14.6 14.4 14.1 14.0 15.4 16.8 27 13.5 13.5 13.1 13.4 13.7 13.4 13.9 14.4 14.0 14.4 15.1 14.7 15.4 15.8 15.9 16.3 16.3 16.3 16.4 16.1 16.4 16.2 16.1 16.0 15.0 16.4 28 16.4 16.4 16.9 16.7 16.2 16.2 16.2 16.0 15.8 15.6 15.3 15.4 15.6 15.8 16.1 16.1 16.3 17.0 17.0 16.6 16.8 16.6 16.3 16.6 16.2 17.0 MEAN 17.7 17.6 17.8 17.8 17.7 17.7 17.7 17.6 17.5 17.6 17.5 17.6 17.5 17.5 17.5 17.4 17.5 17.5 17.7 17.5 17.7 17.7 17.4 17.5 17.6 19.4 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH MARCH YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 15.7 16.2 16.6 17.3 16.4 17.3 17.1 16.9 17.6 18.0 18.0 18.0 18.2 17.9 18.2 17.9 17.7 17.5 17.2 17.2 17.5 17.5 17.5 17.3 17.4 18.2 2 16.8 16.6 17.3 16.9 16.5 16.7 16.7 17.7 18.4 18.6 18.4 18.4 18.3 18.3 18.4 18.1 18.1 18.3 18.1 18.1 18.3 19.0 19.0 19.0 17.9 19.0 3 18.3 18.5 17.9 17.9 17.7 17.7 17.0 17.4 17.7 17.7 17.5 17.5 17.2 17.0 16.4 15.9 15.7 15.7 15.9 15.6 15.9 16.1 16.3 15.9 16.9 18.5 4 16.2 16.2 16.2 16.5 16.5 16.3 16.5 15.8 16.3 16.5 16.3 16.6 16.5 16.3 16.8 16.8 17.0 17.0 17.1 16.8 16.9 17.3 17.6 18.2 16.7 18.2 5 18.2 18.4 18.7 19.1 18.9 18.4 18.8 19.3 18.6 18.8 18.1 18.1 17.4 16.9 15.4 15.2 15.8 15.4 14.9 15.3 14.7 14.9 15.1 14.7 17.0 19.3 6 14.4 15.5 14.0 15.1 15.4 15.6 17.4 18.1 17.1 17.4 16.9 16.3 16.4 16.2 16.5 15.4 16.1 16.1 15.9 16.1 16.4 16.2 17.1 17.6 16.2 18.1 7 16.9 16.4 16.2 15.8 16.1 16.1 16.0 15.9 16.0 17.2 17.5 17.7 17.5 17.9 17.3 17.1 17.3 17.2 17.2 16.8 17.2 17.4 17.6 17.4 16.9 17.9 8 17.7 17.9 18.1 18.2 17.9 18.4 18.4 18.8 18.8 18.5 18.3 17.9 18.5 18.2 18.3 18.3 17.8 17.8 17.4 18.2 17.5 17.3 17.7 16.9 18.0 18.8 9 17.6 17.6 17.6 17.2 16.0 17.4 17.8 17.4 17.4 17.6 17.6 17.1 18.0 18.2 17.8 18.3 19.2 18.8 19.0 19.2 19.5 19.4 19.4 19.7 18.1 19.7 10 20.0 20.2 20.4 20.7 20.9 20.9 20.7 20.5 20.7 20.7 20.7 20.9 20.7 20.2 20.2 20.4 20.5 19.8 19.8 20.0 18.4 18.9 19.3 18.4 20.2 20.9 11 18.6 17.9 18.8 19.1 19.1 18.8 19.1 19.6 17.6 18.8 18.1 17.6 19.0 18.1 18.8 18.1 18.5 18.6 18.6 18.8 18.8 19.0 17.9 18.2 18.6 19.6 12 18.2 17.7 17.0 17.7 17.5 17.9 17.7 18.4 18.4 18.4 18.7 18.7 19.2 18.9 19.6 19.2 19.4 19.4 19.9 19.4 19.6 18.4 18.0 17.7 18.5 19.9 13 17.7 18.2 18.0 18.0 17.7 17.5 17.7 17.9 17.7 18.1 18.1 17.9 17.4 18.5 18.5 18.8 19.5 19.5 19.9 19.4 19.2 19.4 19.4 18.7 18.5 19.9 14 18.3 18.7 19.1 18.5 18.3 18.7 18.4 19.1 19.0 18.7 18.7 18.3 17.6 17.6 17.6 17.4 17.9 18.6 20.2 20.2 21.6 21.8 21.8 21.6 19.1 21.8 15 21.8 21.4 21.6 20.9 21.0 20.5 20.5 20.5 20.5 21.0 20.7 21.0 21.2 20.9 21.0 21.5 21.5 21.0 21.0 21.0 20.8 20.8 20.5 20.8 21.0 21.8 16 20.1 20.1 19.8 19.1 18.9 18.9 18.9 19.1 19.4 19.6 21.0 19.4 19.8 20.3 20.5 20.3 20.1 20.1 20.1 20.1 19.8 20.3 20.3 20.1 19.8 21.0 17 19.6 19.6 19.6 19.6 19.6 19.6 19.6 19.6 19.6 19.5 19.5 18.4 18.4 17.2 17.2 17.2 18.3 18.3 19.5 20.6 20.6 19.5 19.5 20.7 19.2 20.7 18 20.7 19.5 19.5 19.5 19.5 19.5 20.7 23.0 24.2 23.0 23.0 21.8 21.8 20.6 19.5 19.5 18.3 18.3 18.3 18.3 18.3 18.3 18.3 18.3 20.1 24.2 19 18.1 17.9 17.9 17.6 17.2 17.9 17.4 17.2 17.2 16.9 17.6 17.4 17.6 17.4 17.6 17.6 17.6 17.9 17.6 17.9 17.9 17.6 17.6 17.6 17.6 18.1 20 17.4 17.4 17.5 17.5 17.2 17.4 17.2 17.0 17.0 16.8 16.3 16.5 16.5 17.0 17.2 17.2 17.2 17.7 17.7 17.7 18.1 18.1 18.1 18.3 17.3 18.3 21 18.3 18.1 18.5 18.5 18.5 18.3 18.3 17.8 18.2 18.2 18.0 18.2 18.2 18.0 18.0 18.2 18.0 18.2 18.2 18.4 18.2 18.7 18.4 18.7 18.2 18.7 22 18.7 18.7 18.7 18.7 18.5 18.9 19.4 18.9 18.9 18.7 18.7 18.5 18.3 18.9 19.2 19.0 19.4 19.7 19.9 19.9 19.9 20.5 20.5 20.7 19.2 20.7 23 20.7 21.0 20.8 20.6 18.9 18.3 18.7 18.5 18.5 18.5 18.2 18.5 18.7 18.9 18.4 18.7 18.2 18.7 19.1 20.3 20.8 21.0 21.4 21.7 19.5 21.7 24 21.7 21.5 21.5 21.3 21.1 20.6 20.6 20.6 20.6 20.6 21.1 21.1 21.1 21.3 21.6 21.5 21.5 21.3 21.3 21.3 21.5 21.8 21.3 21.3 21.2 21.8 25 21.3 21.3 21.1 20.6 21.1 21.1 20.9 20.9 20.7 21.2 21.0 21.4 21.4 21.2 21.2 21.2 20.5 21.2 21.0 20.8 20.8 20.6 21.1 21.2 21.0 21.4 26 21.7 21.2 21.5 21.7 21.8 21.5 21.5 21.3 21.3 21.1 21.3 21.4 21.6 21.1 21.4 21.3 21.2 21.6 21.4 21.9 21.8 21.6 21.6 22.3 21.5 22.3 27 22.5 22.1 23.0 22.8 22.8 23.3 22.4 23.3 23.5 23.8 24.4 24.0 23.8 23.3 23.1 23.5 23.1 23.5 23.1 23.5 23.1 21.7 21.4 21.0 23.0 24.4 28 21.7 21.4 21.2 20.5 21.2 21.2 21.3 21.0 21.5 22.0 21.3 21.8 21.3 22.7 20.3 20.6 20.8 20.8 20.8 20.8 20.6 20.1 20.3 20.4 21.1 22.7 29 20.1 20.1 19.6 20.6 19.8 19.4 20.3 19.8 20.1 20.8 19.8 20.3 20.7 20.9 21.4 22.1 21.9 21.9 22.4 22.1 21.9 22.1 21.9 22.7 20.9 22.7 30 22.7 22.7 23.1 22.7 22.9 22.5 22.5 22.7 21.5 21.8 22.0 21.7 21.6 20.6 21.6 21.4 21.1 22.0 21.8 21.3 21.8 21.8 22.0 22.0 22.0 23.1 31 21.8 21.3 22.2 22.0 21.6 22.3 22.0 21.8 22.3 21.8 22.0 21.8 21.6 21.3 21.4 21.3 21.6 22.1 22.6 22.3 22.6 22.3 23.1 23.0 22.0 23.1 MEAN 19.1 19.1 19.1 19.1 18.9 19.0 19.1 19.2 19.2 19.4 19.3 19.2 19.2 19.1 19.0 19.0 19.1 19.2 19.2 19.3 19.4 19.3 19.4 19.4 19.2 20.5 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH APRIL YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 23.1 22.6 22.6 23.3 23.5 23.5 22.8 23.0 23.0 23.0 22.5 23.0 22.8 21.8 21.6 21.6 20.4 20.6 20.6 20.6 20.4 20.4 20.4 20.2 22.0 23.5 2 20.9 21.3 20.8 21.8 21.1 21.1 21.1 21.1 21.8 21.7 21.5 20.7 21.6 21.3 21.0 20.8 21.4 21.6 21.8 21.8 22.0 22.0 21.9 22.2 21.4 22.2 3 22.4 22.6 22.6 22.6 23.0 22.5 22.3 22.3 23.0 22.5 22.7 22.1 21.9 21.5 21.5 21.7 21.6 21.6 21.8 22.3 22.3 22.3 22.1 22.1 22.2 23.0 4 22.3 22.4 22.1 22.8 22.7 23.0 23.2 23.2 23.0 23.0 22.7 22.7 23.2 23.1 23.4 22.9 23.1 23.3 23.8 24.2 23.8 23.3 24.2 24.7 23.2 24.7 5 24.4 24.4 24.9 24.4 24.9 24.9 24.6 24.4 24.2 24.6 23.3 23.9 24.4 23.7 24.2 24.4 23.8 24.0 23.7 23.5 23.5 23.1 23.1 22.9 24.0 24.9 6 22.6 22.4 22.7 22.9 23.6 23.9 23.7 23.7 23.9 24.4 24.2 24.2 24.2 24.5 24.2 24.5 24.7 25.0 25.2 25.0 25.3 25.3 25.3 25.1 24.2 25.3 7 24.9 24.7 24.4 23.7 23.2 23.2 22.5 22.3 22.0 22.0 22.3 22.0 22.3 22.0 22.5 22.0 22.5 22.5 22.5 22.6 22.4 22.5 22.5 22.5 22.8 24.9 8 22.3 22.2 22.5 22.7 22.7 22.7 22.3 22.3 22.3 22.3 22.1 21.8 22.1 22.1 22.3 22.6 22.6 22.6 21.7 24.0 22.8 22.6 23.1 22.8 22.5 24.0 9 23.0 23.0 22.8 22.8 22.5 23.0 22.8 22.5 22.7 23.0 22.5 22.5 22.3 22.5 22.8 22.5 23.0 22.5 23.0 22.7 23.0 23.2 23.2 23.5 22.8 23.5 10 23.2 22.7 22.7 22.5 22.9 22.7 22.7 22.2 21.9 22.7 22.6 22.4 22.9 22.4 21.9 22.1 22.4 23.3 22.6 23.0 22.6 22.6 21.7 22.8 22.6 23.3 11 23.5 22.1 22.8 22.8 22.3 21.9 22.8 22.8 22.8 22.3 22.1 21.6 22.6 22.3 21.8 22.1 21.8 22.3 21.5 22.0 21.8 21.7 21.9 21.5 22.2 23.5 12 21.7 21.7 21.7 21.5 21.2 21.5 22.2 21.9 22.9 22.4 22.4 22.8 22.6 22.1 22.3 22.1 22.3 22.0 22.3 22.5 23.2 23.2 24.1 23.1 22.3 24.1 13 22.6 22.4 23.6 23.1 22.6 22.6 23.3 22.1 23.5 22.5 22.8 22.5 22.5 22.5 21.5 22.2 22.2 23.4 22.4 22.9 22.7 22.4 22.5 22.5 22.6 23.6 14 22.7 22.7 22.7 22.7 22.7 22.7 22.7 22.7 22.7 22.7 22.6 22.6 22.6 22.6 22.6 22.6 22.6 22.6 21.4 21.4 21.4 21.4 21.4 21.4 22.3 22.7 15 21.4 21.4 21.3 22.5 22.5 22.5 22.5 23.7 23.7 23.7 23.7 23.7 23.7 23.7 22.5 22.5 22.4 22.4 22.4 23.6 24.8 24.8 24.8 23.7 23.1 24.8 16 23.7 23.7 23.7 24.9 24.9 24.9 23.7 23.7 24.9 24.9 23.7 23.7 23.7 23.7 24.9 24.9 23.7 23.7 23.7 23.7 24.9 23.7 23.7 23.7 24.1 24.9 17 23.7 23.7 24.9 23.8 25.0 25.0 25.0 25.0 25.0 25.0 25.0 25.0 25.0 23.8 25.0 25.0 25.0 25.0 25.0 25.0 25.0 25.0 25.0 23.8 24.7 25.0 18 23.8 23.8 25.0 25.0 25.0 25.0 25.0 25.1 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 25.8 26.3 19 26.3 26.3 26.3 26.3 26.3 26.3 26.3 27.5 27.5 27.5 27.5 27.5 26.4 26.4 25.2 25.2 25.2 25.2 25.2 25.2 25.2 25.2 25.2 25.2 26.1 27.5 20 25.2 25.2 25.2 26.4 26.4 26.4 25.2 26.4 25.2 25.2 25.2 25.2 25.2 26.4 25.3 25.3 25.3 25.3 25.3 25.3 25.3 26.5 26.5 26.5 25.6 26.5 21 26.5 26.5 25.3 25.3 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.5 26.6 26.6 26.6 25.4 26.6 25.4 25.4 26.3 26.6 22 25.4 25.4 25.4 25.4 25.4 24.2 24.2 24.2 24.2 25.4 25.4 25.4 25.4 25.4 25.4 25.4 25.4 25.4 26.6 26.6 26.7 26.7 26.7 26.7 25.5 26.7 23 25.5 25.5 25.5 25.5 25.5 25.5 25.5 25.5 25.5 24.3 25.5 25.5 25.5 25.5 25.5 25.5 25.5 25.5 25.5 25.5 25.5 26.7 26.7 25.6 25.6 26.7 24 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25 25.6 24.5 25.7 25.7 24.5 24.5 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.7 25.5 25.7 26 25.7 25.7 25.7 25.7 25.8 25.8 25.8 25.8 25.8 25.8 25.8 27.0 25.8 25.8 25.8 25.8 25.8 24.6 25.8 25.8 25.8 25.8 25.8 25.8 25.8 27.0 27 24.6 25.8 24.6 25.8 25.8 24.6 25.8 25.9 24.7 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.7 25.9 28 26.2 27.2 25.7 26.0 25.5 24.8 25.6 25.5 25.4 24.9 25.1 26.1 25.6 26.1 26.2 26.4 25.5 26.2 26.0 25.5 25.1 25.0 26.7 25.5 25.7 27.2 29 25.7 25.7 25.5 25.5 25.2 25.5 25.2 24.7 24.7 25.0 25.7 25.6 25.6 26.1 25.6 26.3 25.4 26.0 26.1 25.8 25.6 26.3 26.1 25.6 25.6 26.3 30 25.4 25.4 25.1 25.6 25.1 25.1 25.3 25.1 24.8 25.3 25.1 25.4 25.3 24.9 25.1 25.3 24.6 25.6 25.1 25.1 25.1 25.6 25.1 25.4 25.2 25.6 MEAN 24.0 24.0 24.0 24.1 24.1 24.0 24.1 24.1 24.2 24.2 24.1 24.2 24.2 24.1 24.0 24.1 23.9 24.1 24.0 24.2 24.2 24.2 24.3 24.1 24.1 25.1 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH MAY YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 25.3 24.9 25.1 24.9 24.7 24.7 24.7 25.0 24.7 24.7 25.0 24.5 24.8 24.6 24.6 24.6 24.1 24.6 24.6 24.6 24.4 24.7 24.2 24.4 24.7 25.3 2 24.2 24.2 24.7 25.2 25.0 24.8 25.7 26.2 26.0 26.0 26.2 26.0 26.2 25.9 25.9 25.9 25.7 26.2 25.9 25.9 25.7 26.1 25.8 25.4 25.6 26.2 3 25.6 25.8 26.1 25.1 26.3 25.4 25.6 25.9 25.8 25.9 26.1 24.4 24.6 24.9 26.3 25.2 24.7 25.2 25.9 24.4 25.4 24.9 24.9 24.7 25.4 26.3 4 25.2 25.1 24.7 25.4 25.4 25.4 25.4 25.9 25.9 25.2 23.0 25.2 25.2 24.2 24.9 26.6 24.7 24.7 25.2 25.7 26.9 25.0 25.9 24.7 25.2 26.9 5 25.5 25.5 25.5 25.0 26.0 25.0 25.5 25.3 25.5 25.5 25.6 26.0 25.3 25.8 25.6 25.3 24.9 25.6 25.8 25.6 25.8 25.4 25.4 25.6 25.5 26.0 6 25.6 25.4 24.7 25.1 25.2 25.4 25.7 25.4 26.1 26.4 26.4 26.2 25.7 25.7 25.9 25.2 25.2 25.3 25.5 25.5 25.8 25.1 26.0 25.5 25.6 26.4 7 25.8 25.8 25.8 26.0 26.3 26.5 26.0 26.2 26.5 26.7 26.5 26.7 26.7 26.9 26.5 26.7 26.5 26.7 26.7 26.5 27.5 26.8 27.3 26.8 26.5 27.5 8 26.6 26.8 26.4 26.7 26.2 26.2 27.0 26.8 26.1 26.4 26.4 26.2 26.5 26.3 26.5 25.6 25.6 26.1 25.9 26.0 26.0 25.3 26.0 25.6 26.2 27.0 9 25.1 25.4 25.2 25.2 25.5 25.8 26.1 26.6 25.9 26.4 26.2 26.2 26.2 26.0 26.5 26.7 25.8 25.8 26.6 26.1 26.1 25.9 25.6 26.1 26.0 26.7 10 25.9 25.9 25.7 25.7 25.5 25.9 26.7 25.7 25.7 26.2 26.2 26.2 26.5 26.0 26.3 26.8 27.5 27.5 27.3 27.3 28.3 27.4 28.6 27.4 26.6 28.6 11 27.4 27.2 27.5 29.0 25.5 27.5 28.3 27.8 26.9 26.4 26.2 26.0 26.0 26.0 26.3 26.3 26.1 26.1 26.9 26.4 26.7 26.4 26.4 26.7 26.8 29.0 12 27.0 27.0 27.2 27.3 27.3 27.3 27.3 27.3 27.6 27.8 27.6 27.8 27.8 28.1 28.3 28.1 27.8 28.7 28.5 28.3 28.0 27.7 29.9 29.3 27.9 29.9 13 29.5 29.8 30.7 29.9 30.0 30.4 31.0 30.3 30.7 30.9 30.7 31.1 30.6 30.8 29.4 28.9 28.9 27.9 27.9 27.2 27.6 27.6 26.9 27.2 29.4 31.1 14 26.9 26.4 26.9 26.1 25.9 26.1 26.9 26.8 25.9 26.3 26.8 26.3 26.6 25.6 26.1 26.6 26.4 26.1 26.3 26.6 26.4 26.3 26.8 26.3 26.4 26.9 15 26.5 26.8 26.0 27.0 26.8 26.7 27.2 27.4 27.6 27.4 27.4 27.3 27.3 27.6 27.3 27.3 27.7 28.0 27.9 28.4 28.4 28.4 28.8 28.7 27.5 28.8 16 28.6 28.3 28.1 28.1 28.5 28.3 28.5 29.0 28.5 28.0 28.0 28.0 27.5 28.3 27.8 27.8 27.6 28.0 28.2 28.0 28.0 28.7 29.4 29.0 28.3 29.4 17 28.9 29.0 29.2 29.2 29.9 29.7 29.8 30.1 30.3 30.6 29.4 29.8 29.6 30.1 29.8 29.8 30.1 30.1 29.6 29.9 29.1 29.4 28.9 28.2 29.6 30.6 18 27.5 28.4 28.6 28.6 28.6 28.6 28.8 28.6 28.6 28.3 28.5 28.2 28.9 28.0 30.1 28.2 28.1 29.1 28.3 27.8 26.4 27.0 27.5 27.1 28.2 30.1 19 27.6 27.4 26.7 27.2 28.2 27.7 27.0 27.0 27.2 27.5 27.8 27.5 27.7 27.7 28.2 27.0 27.0 27.0 27.3 27.3 27.7 27.5 27.0 27.2 27.4 28.2 20 27.5 28.0 28.4 27.7 27.7 27.9 28.4 28.4 27.6 28.3 28.5 28.6 28.3 28.1 27.8 27.8 27.6 27.4 27.9 28.0 28.1 28.2 28.7 28.7 28.1 28.7 21 28.7 27.5 27.2 27.6 27.9 28.1 27.7 27.9 27.5 27.5 27.5 27.5 27.2 27.3 27.3 27.3 26.5 27.1 26.6 26.6 26.9 26.9 26.6 26.9 27.3 28.7 22 27.6 26.9 27.1 28.1 26.9 27.4 27.2 27.6 27.4 26.9 26.9 26.4 26.8 26.6 27.1 27.3 26.8 27.5 27.7 27.2 28.7 26.2 26.7 26.9 27.2 28.7 23 27.4 27.4 26.4 26.6 26.9 27.4 26.1 27.1 26.4 26.9 27.8 27.1 26.9 27.8 27.1 26.6 27.3 27.5 27.3 27.5 27.0 27.7 26.8 27.8 27.1 27.8 24 27.5 26.5 27.0 27.5 27.3 27.3 27.8 27.1 27.4 28.1 27.6 27.9 26.9 27.4 27.2 27.0 26.5 27.0 27.0 27.0 27.0 27.0 27.0 27.1 27.2 28.1 25 27.1 27.5 27.6 27.8 27.6 28.0 28.3 28.0 27.8 27.8 28.5 28.2 29.1 29.1 28.6 28.6 28.8 29.0 28.5 28.5 28.6 28.0 28.3 28.0 28.2 29.1 26 28.3 28.0 27.7 27.7 28.7 28.4 27.9 28.2 28.1 28.4 28.6 26.1 27.8 27.3 27.6 27.8 27.6 27.7 28.0 27.8 27.8 27.3 27.8 27.8 27.9 28.7 27 27.7 28.0 28.0 27.8 28.0 28.0 27.7 27.5 27.0 28.0 26.5 27.5 27.1 27.5 27.5 27.5 27.5 27.6 27.7 26.5 26.7 26.4 26.4 27.7 27.4 28.0 28 27.7 27.6 27.6 27.6 27.6 27.7 27.7 27.7 27.7 27.7 27.7 27.8 27.3 27.8 28.0 27.8 27.3 25.9 27.1 27.6 27.4 25.2 27.9 26.7 27.4 28.0 29 26.5 25.7 26.2 26.3 27.7 27.8 27.3 27.8 28.3 27.6 28.1 27.6 27.6 27.4 27.1 26.9 25.4 25.7 25.7 25.7 24.2 24.4 25.4 28.4 26.7 28.4 30 26.9 28.1 28.1 26.1 26.4 28.1 26.9 26.9 25.8 28.3 28.1 27.6 28.1 26.8 26.8 26.8 25.1 25.6 26.1 26.1 26.8 27.1 26.3 26.4 26.9 28.3 31 25.3 26.8 26.8 25.4 26.8 26.6 26.8 26.1 26.1 26.3 25.6 26.8 25.8 27.1 26.8 24.8 25.1 26.5 27.3 26.5 26.3 27.5 26.0 27.3 26.4 27.5 MEAN 26.9 26.9 26.9 26.9 27.0 27.1 27.2 27.2 27.1 27.2 27.1 27.1 27.1 27.1 27.1 26.9 26.6 26.9 27.0 26.9 27.0 26.7 27.0 27.0 27.0 28.1 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH JUNE YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 26.8 26.8 27.2 27.0 26.7 27.2 26.7 26.7 27.0 27.4 27.6 27.7 27.7 28.1 28.1 28.4 28.6 28.3 28.3 28.0 27.8 27.7 27.5 27.2 27.5 28.6 2 27.6 27.8 27.6 27.8 27.5 27.8 28.0 27.5 28.2 28.0 27.7 27.6 28.1 28.3 28.1 27.8 28.0 27.8 28.0 27.9 27.9 27.7 27.2 27.6 27.8 28.3 3 27.4 27.4 27.4 27.3 27.8 28.0 27.8 27.5 27.3 27.5 28.0 28.0 28.0 28.0 28.0 27.7 27.7 28.7 28.2 28.2 28.2 27.9 28.2 27.8 27.8 28.7 4 28.5 28.7 28.5 28.7 28.5 28.5 28.7 28.7 29.0 28.5 28.5 29.0 29.0 28.7 29.0 28.7 28.5 28.7 28.5 28.8 28.5 28.3 28.3 28.3 28.6 29.0 5 28.3 28.1 28.6 28.3 28.1 28.1 28.1 28.1 28.3 28.6 28.8 28.3 28.3 28.5 28.5 28.0 27.8 28.2 27.7 27.7 27.9 27.9 27.9 27.6 28.2 28.8 6 27.6 28.3 28.1 27.5 27.8 27.8 27.8 28.0 28.2 27.7 27.7 28.0 28.0 28.2 28.0 28.0 27.7 28.0 28.0 28.0 27.5 27.7 28.2 27.3 27.9 28.3 7 27.5 28.0 27.8 28.1 28.1 27.9 27.9 27.9 27.7 27.5 27.5 27.5 27.8 27.5 27.5 27.3 27.6 27.6 28.0 28.5 28.1 28.3 28.3 28.6 27.9 28.6 8 28.8 29.1 29.1 28.9 28.8 28.6 28.6 28.3 28.8 27.6 28.9 28.6 27.6 28.1 27.9 27.4 27.1 27.4 27.4 27.4 27.4 27.5 28.0 27.2 28.1 29.1 9 27.7 27.5 27.8 27.5 27.7 27.8 28.0 28.3 28.0 28.5 28.2 28.5 28.7 28.7 29.0 28.9 28.4 28.7 28.1 28.6 28.6 28.3 28.1 28.5 28.3 29.0 10 28.3 28.3 28.0 28.2 28.2 28.2 28.2 28.2 27.9 28.2 27.9 28.2 27.7 28.2 28.2 27.9 27.9 27.4 27.8 27.9 28.2 28.5 28.7 28.4 28.1 28.7 11 28.2 27.9 29.4 27.9 28.2 28.4 28.2 28.4 28.9 28.6 28.1 28.1 28.6 28.4 28.4 28.7 27.9 28.9 28.2 28.4 28.7 28.7 28.7 28.5 28.4 29.4 12 28.5 28.7 28.7 28.5 28.5 28.6 28.1 28.3 28.1 27.6 27.4 27.9 27.6 27.9 27.9 28.1 27.9 28.1 28.6 28.8 28.8 28.6 29.2 29.0 28.3 29.2 13 29.0 29.0 29.2 29.2 28.9 29.0 29.5 29.3 28.8 29.1 28.9 28.9 29.6 29.1 29.2 29.0 28.9 29.0 29.2 29.0 29.2 28.8 29.0 28.8 29.1 29.6 14 29.0 28.8 28.3 28.4 28.9 28.4 29.2 28.9 28.5 29.5 28.5 28.7 29.0 29.2 29.5 29.8 29.0 29.8 29.2 29.2 29.0 29.7 29.2 29.2 29.0 29.8 15 29.2 29.5 29.2 29.2 29.2 29.0 29.2 28.7 29.0 29.0 29.0 29.0 29.0 28.6 28.8 29.3 29.1 28.8 28.6 28.6 28.3 27.9 28.6 28.8 28.9 29.5 16 29.1 28.9 29.4 28.9 28.6 29.1 28.9 29.4 28.9 29.4 29.6 29.6 29.7 29.9 29.9 29.7 29.4 29.4 29.1 28.9 29.1 29.1 29.6 28.8 29.3 29.9 17 29.8 30.0 30.0 28.5 28.7 28.9 29.9 29.6 28.4 29.6 29.8 30.7 30.2 30.5 30.2 30.0 28.7 29.7 30.3 29.1 29.1 28.2 30.4 30.6 29.6 30.7 18 30.3 30.5 31.5 30.8 31.3 31.3 31.0 31.0 30.4 29.1 29.3 29.3 29.0 29.0 28.7 29.1 29.1 29.1 29.3 28.8 29.8 29.8 30.0 30.0 29.9 31.5 19 30.0 30.0 29.8 30.2 30.0 30.4 30.7 30.4 30.5 31.2 31.3 31.2 31.2 31.2 31.2 31.2 31.6 31.9 31.6 31.4 31.3 31.0 31.0 30.8 30.9 31.9 20 31.0 31.2 31.4 30.9 31.1 30.6 30.8 31.3 31.3 31.1 30.8 31.1 31.1 30.6 30.9 30.6 30.7 31.1 31.2 31.0 30.8 31.1 32.3 33.6 31.1 33.6 21 33.1 33.6 33.8 34.0 34.2 33.5 34.2 34.2 33.9 33.8 32.4 32.6 31.8 31.5 31.5 31.7 31.4 31.4 31.1 31.4 31.3 31.1 31.5 31.6 32.5 34.2 22 31.1 30.8 30.6 30.8 30.6 30.4 30.6 30.4 30.6 30.7 30.5 30.3 30.1 30.4 30.4 30.5 30.8 30.6 31.1 30.7 31.2 31.5 31.3 30.9 30.7 31.5 23 30.9 30.5 31.0 30.8 30.8 31.1 31.6 31.6 31.3 31.8 30.3 31.1 30.1 30.6 30.6 30.8 29.9 30.4 29.7 30.2 30.2 30.4 30.7 30.1 30.7 31.8 24 30.4 30.1 29.8 29.8 29.8 29.8 30.3 30.0 30.3 29.8 30.5 31.1 31.5 30.6 30.1 30.6 29.6 30.3 30.0 29.3 29.5 29.3 29.3 29.3 30.1 31.5 25 29.9 29.6 29.8 30.0 30.3 30.0 30.5 30.3 31.0 31.0 30.7 30.7 31.2 31.0 31.0 30.8 31.3 30.6 31.1 31.3 31.5 31.8 31.0 31.8 30.8 31.8 26 31.3 31.5 32.2 31.0 31.0 30.7 30.7 30.9 30.9 30.9 30.9 30.1 28.7 27.9 28.2 28.7 28.9 29.7 28.7 28.9 28.7 28.0 28.2 27.9 29.8 32.2 27 27.9 28.2 27.9 27.5 28.7 28.5 29.7 30.4 30.2 29.7 29.3 29.0 28.8 27.8 28.3 29.3 28.8 29.8 29.6 30.0 30.0 30.3 30.5 30.5 29.2 30.5 28 30.3 30.5 31.3 31.1 31.1 30.6 30.8 30.6 31.0 30.3 30.6 31.0 30.8 30.3 30.8 30.6 30.3 30.3 30.1 30.1 30.8 30.5 31.0 30.5 30.6 31.3 29 30.7 30.3 30.0 29.8 31.0 30.2 30.0 29.5 29.0 30.0 30.5 30.7 29.7 30.7 30.0 30.2 30.3 30.5 30.7 30.5 29.7 30.2 30.0 30.2 30.2 31.0 30 29.8 30.0 30.3 30.3 30.8 30.8 30.6 31.1 31.4 31.1 31.6 30.9 31.4 30.9 31.1 31.2 30.7 30.6 31.2 31.1 31.2 31.1 30.4 30.9 30.9 31.6 MEAN 29.3 29.3 29.5 29.2 29.4 29.3 29.5 29.5 29.4 29.4 29.4 29.4 29.3 29.3 29.3 29.3 29.1 29.4 29.3 29.3 29.3 29.2 29.4 29.3 29.3 30.3 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH JULY YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 30.7 31.0 31.0 30.7 30.9 30.7 31.0 31.0 31.3 31.5 30.5 30.6 30.5 30.6 30.9 30.9 31.4 30.8 31.1 31.1 30.9 30.6 30.6 30.8 30.9 31.5 2 30.8 31.4 30.4 31.2 31.6 31.8 32.3 32.0 32.3 31.5 31.8 31.5 31.2 31.2 31.2 31.2 30.7 31.2 31.2 31.2 31.0 30.7 30.5 30.7 31.3 32.3 3 31.0 30.7 30.8 31.0 31.0 30.8 30.8 30.5 30.3 30.8 31.1 30.4 31.6 30.9 31.2 31.2 32.2 30.5 30.5 30.5 30.8 29.8 30.5 30.3 30.8 32.2 4 30.3 30.3 30.3 30.1 30.1 29.9 30.4 30.4 30.9 30.4 30.1 30.4 30.4 30.6 31.1 30.4 30.4 30.4 30.1 30.9 31.2 31.2 31.9 30.7 30.5 31.9 5 31.5 31.2 31.5 31.0 32.0 31.1 31.8 31.1 31.1 32.4 31.4 31.2 31.7 32.0 32.0 31.8 30.6 31.1 31.9 30.9 31.4 31.9 31.7 32.2 31.5 32.4 6 31.7 31.5 31.0 31.3 30.8 30.5 31.2 31.2 31.0 31.0 30.7 30.5 30.7 31.0 31.2 31.8 31.0 30.7 31.7 31.5 31.5 31.7 31.2 31.5 31.2 31.8 7 31.5 31.5 31.7 32.0 32.0 31.0 32.0 32.0 31.0 31.5 32.3 31.8 31.5 31.5 31.3 31.6 31.1 32.3 31.1 31.4 31.4 31.4 31.7 31.0 31.6 32.3 8 31.3 30.8 30.9 30.7 30.2 30.4 30.7 30.8 30.8 30.8 30.3 30.1 30.9 30.7 31.0 31.0 30.0 31.3 31.4 31.7 31.9 31.8 32.0 31.7 31.0 32.0 9 32.0 31.5 31.7 31.5 31.7 31.7 31.7 32.0 31.7 31.5 31.8 31.6 31.4 31.6 31.7 31.7 31.4 31.7 31.2 31.7 32.0 32.0 31.6 31.9 31.7 32.0 10 32.2 31.7 32.2 31.9 31.7 31.5 31.6 31.4 32.0 31.8 31.5 31.6 31.6 30.0 31.4 31.1 31.9 32.9 33.5 33.7 33.8 34.0 34.3 34.1 32.2 34.3 11 34.6 33.2 32.5 32.4 34.7 32.6 35.0 34.4 32.8 33.1 32.8 33.0 32.5 32.5 32.7 32.5 31.7 32.1 32.1 32.1 31.8 32.0 32.2 31.9 32.8 35.0 12 32.4 32.4 32.4 32.3 32.6 32.8 32.5 32.2 32.2 32.4 32.6 32.6 32.9 33.1 34.3 33.8 33.6 33.8 34.8 35.0 34.8 35.0 34.8 34.5 33.3 35.0 13 34.3 34.5 34.5 34.7 34.0 34.0 34.0 34.0 33.8 35.1 34.8 32.3 34.8 33.9 34.1 32.9 32.7 31.4 32.9 30.7 31.7 30.7 33.8 33.6 33.5 35.1 14 31.8 31.3 33.9 30.7 30.7 30.5 32.5 31.0 30.0 32.8 32.9 33.6 33.1 33.7 33.7 33.2 31.6 29.6 29.3 30.1 29.8 32.4 33.1 34.4 31.9 34.4 15 35.1 34.6 34.3 33.6 33.0 32.2 33.2 32.2 32.2 32.4 32.2 30.7 31.9 32.4 31.7 31.9 31.7 31.4 30.9 31.4 32.6 32.6 32.6 32.5 32.5 35.1 16 32.5 32.6 32.5 32.5 32.5 32.5 32.5 32.5 32.5 32.4 32.4 32.4 32.4 32.4 32.4 32.4 32.4 33.5 32.7 32.4 32.7 32.7 32.5 33.0 32.6 33.5 17 32.7 32.8 31.8 32.3 32.1 32.1 32.3 32.4 32.9 32.4 32.4 32.7 32.7 33.2 33.4 32.7 32.8 32.6 32.6 32.6 32.9 32.7 33.0 33.0 32.6 33.4 18 32.5 32.5 32.5 32.5 33.0 32.8 32.3 32.8 33.0 33.0 32.7 32.5 32.5 32.7 33.0 33.0 32.7 33.0 32.7 32.5 32.7 33.0 33.4 33.4 32.8 33.4 19 33.2 33.2 33.1 33.1 32.9 32.6 32.6 32.4 32.9 32.8 32.1 32.4 32.6 32.3 32.5 32.5 32.6 32.1 32.3 32.1 32.1 31.9 32.1 31.9 32.5 33.2 20 32.1 31.9 31.7 32.2 32.0 31.7 32.2 31.7 32.0 32.0 32.0 32.5 32.3 32.2 32.5 32.0 32.0 32.3 32.0 31.8 32.3 31.8 31.8 31.9 32.0 32.5 21 32.7 32.2 32.5 32.7 32.7 32.7 32.5 33.0 32.8 32.5 33.0 33.3 32.8 32.8 33.3 33.3 33.0 32.5 32.5 32.5 32.3 32.5 32.3 32.3 32.7 33.3 22 32.6 32.6 32.6 32.8 32.6 32.6 32.6 32.4 32.1 31.9 32.1 32.6 32.3 32.3 32.3 32.3 31.8 31.8 31.1 31.3 31.4 31.4 31.7 32.9 32.2 32.9 23 33.4 33.4 33.7 33.1 33.4 33.6 33.1 33.4 33.1 33.6 33.3 33.0 33.5 34.0 33.7 33.4 32.9 33.1 32.8 33.1 32.8 32.8 32.2 32.5 33.2 34.0 24 32.5 33.5 31.9 32.1 32.1 32.6 32.1 32.1 31.8 32.3 32.3 32.8 32.6 32.3 32.3 32.6 32.6 33.6 33.3 33.1 32.6 32.9 33.1 33.1 32.6 33.6 25 33.2 32.9 32.4 32.4 32.7 32.7 32.2 32.2 32.0 32.3 32.0 32.2 32.5 33.0 32.8 33.1 33.3 33.6 33.6 33.6 33.9 33.6 33.4 33.3 32.9 33.9 26 33.4 32.8 32.8 32.8 33.1 33.1 33.1 33.1 32.5 32.3 32.0 32.0 32.3 32.0 31.2 31.2 31.8 31.3 31.5 31.2 31.2 31.8 31.8 32.0 32.2 33.4 27 31.8 31.8 32.3 31.5 31.5 32.3 31.8 32.3 32.6 32.6 32.6 32.9 32.9 32.1 32.1 31.5 31.3 31.8 31.5 31.3 31.2 31.0 30.5 30.7 31.8 32.9 28 30.5 30.5 30.2 30.2 30.5 30.7 30.5 30.5 30.0 29.7 29.5 29.8 29.5 29.5 29.5 29.3 29.3 29.1 28.8 29.1 28.6 29.1 30.4 30.1 29.8 30.7 29 30.6 30.9 31.4 32.2 32.2 32.7 32.7 32.7 32.7 32.9 32.7 32.6 32.9 32.3 32.1 32.1 31.5 31.5 31.6 31.9 31.9 31.8 32.6 32.1 32.1 32.9 30 31.5 32.3 33.4 31.8 31.8 31.8 32.3 31.8 31.6 31.6 31.9 31.6 32.2 32.2 32.0 31.9 31.7 31.4 32.0 32.2 30.9 31.4 31.4 31.1 31.8 33.4 31 30.8 33.2 31.3 30.7 30.4 31.2 31.4 31.6 31.6 31.5 32.8 32.2 31.4 32.4 31.6 31.1 31.6 32.9 32.3 32.0 32.2 32.2 31.7 32.4 31.8 33.2 MEAN 32.2 32.1 32.1 31.9 32.0 31.9 32.2 32.0 31.9 32.1 32.0 31.9 32.1 32.1 32.1 32.0 31.8 31.8 31.8 31.8 31.9 32.0 32.1 32.2 32.0 33.1 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH AUGUST YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 32.7 32.4 32.9 32.6 32.4 31.6 30.5 30.5 30.6 31.8 32.6 32.6 31.9 31.1 31.9 32.5 31.7 32.0 32.0 31.0 30.9 29.6 30.4 29.9 31.6 32.9 2 31.2 31.0 31.2 31.0 30.0 31.0 29.9 31.0 29.7 29.4 29.4 29.9 30.0 31.2 30.2 30.5 28.9 31.0 30.3 31.3 30.1 30.1 30.1 29.9 30.4 31.3 3 30.2 30.2 30.5 30.8 31.1 30.8 31.9 30.6 31.7 30.1 30.4 32.0 32.8 33.1 30.7 31.5 32.3 31.3 31.0 32.3 30.5 32.3 32.6 32.3 31.4 33.1 4 32.3 32.6 33.1 32.6 32.1 30.7 30.2 31.5 32.8 31.7 32.7 31.9 31.9 30.6 32.1 33.7 32.9 32.9 32.6 33.2 32.6 33.9 32.6 32.1 32.3 33.9 5 32.8 31.5 30.7 31.5 31.5 31.5 31.5 31.2 30.9 31.7 31.2 31.4 31.7 32.5 31.4 32.5 31.7 31.7 31.7 31.7 31.8 32.9 31.5 32.0 31.7 32.9 6 32.3 32.0 31.0 32.3 32.6 31.8 33.6 31.6 32.1 32.4 31.6 32.4 31.4 31.9 32.2 31.9 31.1 32.2 32.2 32.2 32.7 31.7 31.7 30.4 32.0 33.6 7 32.2 33.0 31.4 33.0 32.5 32.2 32.5 31.7 31.4 32.7 33.0 31.9 32.2 32.2 32.1 31.9 31.9 33.2 32.9 32.3 32.3 33.0 32.3 32.7 32.4 33.2 8 33.3 32.7 33.5 32.7 31.9 31.9 32.9 32.6 32.1 31.8 32.6 33.4 32.3 31.5 32.5 32.0 31.2 32.2 31.9 31.9 31.9 31.9 32.4 31.8 32.3 33.5 9 32.1 32.6 32.3 32.1 32.9 32.6 32.1 32.6 32.1 32.9 32.3 32.6 32.6 31.8 32.3 32.3 32.6 32.5 32.5 33.0 32.7 32.7 33.4 33.4 32.5 33.4 10 33.8 33.8 34.0 34.0 34.0 33.4 33.9 33.9 33.7 33.9 33.6 33.9 33.9 32.9 33.1 32.3 32.1 32.6 32.6 32.6 32.6 32.6 32.6 32.1 33.2 34.0 11 32.6 32.8 32.6 32.8 32.6 32.6 32.6 32.9 32.9 32.9 32.9 33.4 33.4 32.9 33.2 32.2 31.9 31.9 31.5 31.2 31.0 31.5 31.0 31.0 32.3 33.4 12 32.3 32.8 33.8 33.6 33.4 33.7 32.7 32.7 31.7 32.8 32.3 31.9 32.2 32.2 31.7 31.6 31.8 32.4 32.7 33.3 33.6 33.9 34.9 35.6 32.9 35.6 13 35.0 34.7 34.7 34.7 34.6 34.3 34.8 34.8 34.7 34.4 34.7 34.7 33.6 33.5 33.0 32.9 32.9 33.1 33.1 33.0 32.8 33.5 33.7 33.9 34.0 35.0 14 33.6 33.3 33.5 33.0 33.2 33.2 33.4 34.1 33.6 32.3 32.8 32.3 32.5 32.2 32.2 32.2 32.2 32.7 31.9 32.7 32.4 32.4 32.6 32.7 32.8 34.1 15 32.9 32.1 33.4 33.1 32.4 32.4 32.6 32.9 32.6 33.4 32.9 32.4 33.2 32.9 32.4 32.4 31.9 32.4 32.0 31.7 32.3 31.5 31.7 31.5 32.5 33.4 16 32.3 31.8 32.1 32.1 32.3 32.3 32.1 32.6 32.3 32.0 32.0 32.3 32.3 32.3 32.0 32.0 32.3 31.8 31.8 31.8 32.8 31.7 31.7 31.5 32.1 32.8 17 31.4 31.7 32.2 32.2 31.9 32.2 32.7 31.4 31.6 32.1 31.8 31.8 31.5 31.8 31.5 31.8 31.0 32.0 31.7 32.2 31.2 31.7 31.7 31.3 31.8 32.7 18 31.9 31.6 31.6 31.5 31.8 31.2 31.2 31.7 32.5 32.2 32.2 32.1 32.2 32.1 31.6 32.1 31.6 31.6 31.6 31.3 31.5 31.2 31.2 31.2 31.7 32.5 19 31.1 31.3 31.4 31.3 31.8 31.3 31.7 31.7 31.2 31.4 31.2 31.4 30.9 31.6 31.6 31.9 31.3 31.8 31.6 31.6 31.4 32.2 32.2 31.6 31.5 32.2 20 31.1 31.9 30.6 30.9 31.1 31.2 31.7 32.2 31.9 31.7 31.2 31.2 32.0 30.9 30.7 31.7 31.5 32.5 33.0 33.0 32.8 33.5 33.8 32.8 31.9 33.8 21 33.3 32.8 33.1 33.1 33.1 32.5 30.7 31.5 32.0 31.5 31.5 30.7 30.7 29.9 30.0 29.7 30.7 30.7 29.2 29.2 29.2 29.2 28.9 29.2 30.9 33.3 22 30.3 29.0 29.5 29.2 28.7 28.7 30.3 29.7 31.3 31.0 30.8 31.3 31.3 31.8 31.8 32.1 32.1 32.1 32.1 31.9 32.2 31.9 31.9 31.9 31.0 32.2 23 32.5 31.9 31.7 31.5 31.8 32.0 32.3 32.6 32.3 32.1 32.4 32.6 33.1 32.9 32.6 32.6 32.7 32.7 32.7 32.4 32.9 32.4 32.4 31.9 32.4 33.1 24 32.2 32.5 33.0 32.7 32.2 33.3 33.0 32.8 32.5 32.8 32.8 32.8 32.8 32.8 32.6 32.8 32.6 32.6 32.6 32.7 32.7 32.4 32.4 32.4 32.7 33.3 25 32.5 32.7 32.7 32.5 32.2 32.5 32.2 32.0 32.0 32.3 32.3 32.0 32.3 32.3 32.3 32.0 32.0 32.3 32.3 32.0 32.0 32.3 31.8 32.0 32.2 32.7 26 32.0 31.7 31.7 31.7 32.3 32.2 31.2 31.5 31.8 31.8 32.1 32.1 32.2 31.9 32.0 32.0 31.8 32.0 31.8 32.1 31.7 31.8 31.5 32.0 31.9 32.3 27 31.7 30.4 30.2 30.7 30.7 31.3 31.3 31.4 31.9 31.7 32.2 32.5 32.8 32.8 33.6 33.4 33.4 33.4 33.1 33.4 33.6 32.8 32.8 32.3 32.2 33.6 28 32.6 32.6 33.0 32.2 32.8 33.3 31.9 31.4 32.1 31.8 32.1 32.1 31.8 31.5 31.7 32.0 31.2 31.7 32.2 32.2 32.2 32.2 31.6 31.6 32.1 33.3 29 31.1 31.9 32.1 32.1 31.1 31.3 31.5 31.0 31.0 31.0 31.3 31.8 31.5 31.2 31.0 31.2 30.9 31.5 31.4 31.1 31.4 31.9 31.1 30.8 31.3 32.1 30 30.8 31.1 31.3 31.3 31.1 31.3 31.8 31.3 31.3 31.8 31.2 31.7 31.2 31.2 31.2 31.5 31.5 31.5 31.5 31.2 31.7 31.4 31.2 31.2 31.3 31.8 31 31.4 31.7 31.4 30.6 30.6 30.6 30.4 31.2 31.4 30.9 31.4 30.9 31.1 31.1 30.8 30.6 31.1 31.3 31.3 30.5 30.8 31.3 30.8 31.0 31.0 31.7 MEAN 32.2 32.1 32.1 32.1 32.0 32.0 32.0 31.9 32.0 32.0 32.0 32.1 32.1 32.0 31.9 32.0 31.8 32.1 32.0 32.0 31.9 32.0 31.9 31.8 32.0 33.1 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH SEPTEMBER YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 30.8 30.8 31.5 30.5 31.0 30.5 30.7 30.2 31.0 30.2 30.4 30.4 29.9 30.7 30.4 30.7 30.4 30.9 30.9 31.4 30.6 30.4 31.1 30.8 30.7 31.5 2 31.4 31.1 31.6 31.4 30.9 31.1 29.8 30.1 29.3 30.8 30.3 31.1 29.8 30.8 30.6 30.1 29.5 29.8 29.6 30.1 30.6 31.1 31.4 30.9 30.5 31.6 3 29.8 31.7 29.9 30.9 29.9 30.4 29.6 29.7 28.9 28.6 28.1 27.4 26.9 26.9 27.7 27.2 27.2 27.2 28.0 27.5 27.3 26.6 26.9 27.1 28.4 31.7 4 26.1 25.3 25.6 25.9 25.9 25.4 25.6 25.6 25.7 25.7 25.7 26.2 26.0 26.8 26.5 26.5 26.5 26.8 26.2 26.7 26.4 25.9 26.7 26.9 26.1 26.9 5 26.9 27.1 27.9 28.4 29.2 28.9 29.9 29.7 30.7 30.6 30.7 30.1 29.9 29.6 30.4 29.8 30.3 30.3 30.3 30.6 30.1 30.6 30.3 30.5 29.7 30.7 6 30.6 31.1 30.8 31.6 30.8 30.8 30.6 30.8 30.3 30.0 30.3 30.8 30.0 30.0 30.5 31.3 29.8 29.8 30.3 29.8 30.0 29.5 29.8 30.3 30.4 31.6 7 28.8 29.8 28.8 29.1 29.3 28.8 28.8 28.6 29.1 28.6 28.6 28.6 28.6 28.6 28.9 28.9 28.6 28.6 28.4 29.1 28.9 29.4 29.2 28.3 28.9 29.8 8 28.6 28.6 28.4 28.6 28.4 29.4 29.4 28.9 29.7 28.9 28.9 30.0 29.7 29.2 30.0 29.7 29.7 29.7 30.0 30.0 30.3 30.9 31.1 31.9 29.6 31.9 9 31.1 31.2 31.2 31.2 30.9 30.7 30.7 30.5 30.5 30.0 29.7 30.3 30.6 30.6 30.6 30.6 29.6 29.9 29.9 30.4 30.4 30.6 30.6 29.6 30.5 31.2 10 29.3 29.1 29.4 29.4 30.0 29.4 29.7 29.7 29.5 29.8 29.3 29.3 29.8 30.1 30.1 30.4 29.8 30.3 30.0 28.7 28.7 27.6 28.1 27.2 29.4 30.4 11 28.0 27.5 27.5 26.1 27.1 28.4 26.8 27.0 27.3 27.3 27.0 27.5 27.4 27.2 27.4 27.7 27.4 27.4 27.9 27.6 27.6 27.6 27.6 27.9 27.4 28.4 12 27.6 27.6 27.3 27.3 27.3 27.1 26.8 27.6 27.4 26.9 24.8 24.8 24.3 24.8 24.8 25.4 26.0 27.1 26.3 26.6 26.9 25.8 26.1 25.9 26.3 27.6 13 25.7 26.5 26.0 24.7 24.2 24.2 24.2 25.3 27.0 27.5 27.8 27.9 27.3 27.6 27.7 27.7 27.7 28.0 28.1 28.4 27.9 27.9 27.6 27.9 26.9 28.4 14 27.9 28.0 27.7 28.0 27.7 28.2 28.0 28.3 28.0 28.0 28.5 28.5 28.5 29.3 29.6 29.0 28.7 29.2 28.7 28.6 29.7 29.7 29.4 28.8 28.6 29.7 15 29.1 29.3 29.5 29.8 29.0 28.7 28.9 28.6 29.2 28.6 28.9 30.2 28.1 28.1 26.0 29.2 29.5 29.5 29.8 31.1 29.8 29.9 29.1 29.4 29.1 31.1 16 30.5 31.0 31.1 30.3 30.3 30.4 30.4 30.9 30.7 30.4 31.0 30.4 30.4 30.1 30.4 30.7 31.0 30.4 30.9 31.1 31.1 31.4 30.6 30.5 30.7 31.4 17 30.5 30.0 29.7 29.4 29.2 29.6 29.9 30.4 30.6 30.1 30.1 30.3 30.0 30.0 30.2 30.3 30.0 29.7 30.0 30.0 30.0 29.7 29.5 29.8 30.0 30.6 18 30.3 30.3 29.8 30.1 29.8 29.8 30.1 29.8 30.1 30.9 30.4 30.4 30.4 30.7 30.1 30.4 30.1 30.7 30.1 30.4 30.7 30.1 30.1 30.1 30.2 30.9 19 30.1 29.9 30.2 29.7 30.0 29.7 29.2 29.5 29.2 29.5 29.2 30.0 29.5 29.2 28.2 28.4 27.9 27.9 26.8 26.8 25.3 25.0 24.0 24.0 28.3 30.2 20 24.2 24.2 24.8 25.0 25.6 26.9 25.9 26.2 25.9 27.0 27.0 27.3 26.8 26.0 26.0 26.5 27.0 27.0 28.9 29.1 29.1 31.0 29.4 29.6 26.9 31.0 21 30.2 30.1 29.9 30.4 31.4 31.4 30.3 30.5 31.0 30.7 30.9 31.1 30.3 30.0 29.9 29.4 29.9 31.2 30.9 29.8 29.8 29.5 30.1 29.8 30.3 31.4 22 30.1 29.6 29.1 30.1 29.1 29.4 29.6 29.6 29.4 28.6 28.6 29.4 29.1 29.1 30.7 30.2 29.4 31.2 30.7 30.7 29.9 29.9 29.9 30.4 29.7 31.2 23 30.7 30.4 30.4 30.4 30.1 30.4 29.3 30.6 30.4 30.6 30.1 30.3 30.1 30.3 30.6 30.1 30.3 30.6 31.5 31.4 31.9 32.1 32.1 31.8 30.7 32.1 24 32.1 32.1 32.0 31.8 31.5 31.0 30.8 30.2 30.2 30.2 30.2 30.0 29.7 30.0 30.0 29.7 29.7 29.8 30.0 30.3 29.8 30.0 29.5 29.5 30.4 32.1 25 30.8 31.1 31.0 31.1 30.8 31.0 30.5 30.5 30.3 31.1 30.8 30.8 31.4 31.4 31.4 31.1 30.6 30.9 30.7 30.9 31.0 31.2 31.0 31.3 30.9 31.4 26 31.0 31.0 31.0 30.7 30.2 30.7 30.9 30.9 31.4 31.4 31.5 31.5 30.8 31.3 31.4 31.7 32.0 31.3 31.0 31.3 30.8 31.7 31.1 31.1 31.2 32.0 27 29.8 29.3 28.7 29.7 28.7 28.4 28.9 28.1 28.6 27.8 28.4 28.4 28.4 28.9 28.7 30.5 29.8 27.9 27.7 28.5 27.4 27.1 27.7 27.4 28.5 30.5 28 27.9 28.2 28.7 28.2 27.7 28.5 29.0 28.2 28.5 28.0 28.0 28.2 28.2 28.5 28.5 29.0 30.1 30.4 32.5 33.0 32.2 32.2 31.4 31.7 29.5 33.0 29 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.4 31.3 31.3 31.3 31.3 31.3 31.3 32.7 32.7 32.7 32.7 32.7 31.6 32.7 30 31.3 31.3 31.3 32.7 32.7 32.7 32.7 32.7 32.7 32.7 31.3 31.3 32.7 32.7 32.7 32.7 32.7 32.7 32.7 32.7 32.7 32.7 32.7 32.6 32.4 32.7 MEAN 29.4 29.5 29.4 29.5 29.3 29.4 29.3 29.3 29.5 29.4 29.3 29.5 29.2 29.3 29.4 29.5 29.4 29.6 29.7 29.8 29.6 29.7 29.6 29.5 29.5 30.9 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH OCTOBER YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 32.6 32.6 32.5 32.2 32.4 31.9 31.9 31.3 31.6 31.3 30.7 30.5 30.2 29.9 29.9 29.4 29.9 29.6 29.3 28.8 28.6 28.3 28.3 28.3 30.5 32.6 2 28.3 28.3 28.0 27.5 27.7 27.5 27.2 27.5 27.2 26.7 27.3 27.5 27.0 27.3 26.7 27.2 27.3 27.0 27.3 27.3 27.3 27.0 26.8 26.8 27.3 28.3 3 27.0 27.0 27.6 28.4 28.2 28.2 28.4 28.4 28.2 28.5 28.2 28.2 28.5 28.5 28.8 29.1 28.8 29.4 29.4 28.9 28.9 28.9 28.9 28.9 28.5 29.4 4 28.4 28.7 27.7 28.5 28.7 29.0 31.6 31.6 31.8 32.6 31.5 32.8 32.3 30.9 31.5 32.6 32.3 32.3 32.8 32.0 32.3 32.8 32.3 32.0 31.2 32.8 5 33.1 32.3 32.1 32.3 31.8 32.4 32.1 31.5 31.8 32.0 32.3 32.4 32.1 31.9 32.1 32.3 32.6 31.8 32.4 32.1 32.3 32.3 32.5 32.8 32.2 33.1 6 32.6 31.2 31.5 30.8 30.3 29.5 30.0 29.2 29.4 29.2 29.9 30.2 30.7 30.2 30.9 30.6 31.2 30.6 30.4 30.9 31.4 30.6 30.3 31.1 30.5 32.6 7 30.6 30.6 31.1 31.4 30.9 31.4 30.6 30.8 30.3 30.8 30.1 30.1 30.4 30.4 29.9 29.4 29.7 30.3 30.8 31.1 31.9 32.6 32.9 33.1 30.9 33.1 8 32.8 33.1 32.6 31.4 31.5 32.2 30.9 31.4 31.7 32.2 32.2 32.7 32.2 33.0 32.3 32.8 33.6 32.6 32.6 32.3 32.8 32.6 33.1 31.8 32.3 33.6 9 32.1 31.3 31.3 30.3 30.3 31.1 29.5 29.2 28.9 30.2 30.5 31.0 30.8 31.6 31.6 31.1 31.1 31.4 29.2 30.8 30.1 30.3 30.3 29.3 30.5 32.1 10 30.4 31.7 30.7 30.4 30.4 30.7 31.2 31.7 31.7 31.2 31.4 31.7 31.7 31.7 32.0 31.9 31.7 31.4 29.6 30.6 30.1 30.5 30.6 30.3 31.0 32.0 11 31.7 32.2 29.5 32.0 33.0 32.5 31.1 29.8 29.7 30.2 29.2 28.6 28.4 28.6 28.9 29.7 30.7 30.5 29.2 29.2 29.2 29.7 28.9 29.7 30.1 33.0 12 29.7 29.2 29.5 30.9 30.7 30.4 28.6 28.6 28.6 29.9 31.0 31.3 30.0 31.1 31.9 31.7 32.2 32.0 32.2 32.3 32.5 32.3 32.6 32.6 30.9 32.6 13 32.6 32.1 32.1 30.6 29.0 29.8 29.8 30.4 31.7 31.4 31.1 30.6 30.6 30.6 30.9 30.9 30.9 30.6 31.2 30.7 30.4 30.9 30.4 30.9 30.8 32.6 14 30.6 31.2 30.7 31.5 30.5 31.3 31.0 30.7 31.2 31.2 30.7 31.0 30.8 31.4 31.4 30.9 31.4 31.5 31.2 31.1 31.9 31.3 32.5 31.6 31.2 32.5 15 32.0 30.1 30.9 31.4 32.9 32.8 33.3 33.2 33.0 32.4 32.2 32.7 32.9 32.2 32.4 32.4 32.7 32.9 32.4 32.4 32.1 32.4 32.4 33.2 32.4 33.3 16 32.1 31.8 32.1 32.2 32.4 31.9 32.1 31.9 32.4 32.1 32.1 31.9 32.1 32.1 31.9 31.9 31.9 31.8 31.8 31.9 31.8 31.6 31.8 31.8 32.0 32.4 17 32.3 33.2 31.9 31.3 31.4 31.4 31.5 30.7 30.8 30.8 30.5 31.1 31.1 31.1 31.7 31.1 31.1 30.8 30.9 30.6 30.8 31.3 30.8 30.5 31.2 33.2 18 30.8 31.0 30.8 30.8 31.4 31.6 32.1 31.5 31.8 32.1 32.0 32.0 31.7 32.0 31.7 31.7 31.7 31.1 30.8 31.1 30.8 30.5 30.8 30.8 31.4 32.1 19 31.0 30.5 30.8 30.6 30.3 30.5 30.8 30.8 31.3 31.3 31.8 31.3 31.5 31.5 31.3 31.3 31.5 31.3 31.6 31.3 31.0 31.6 31.0 31.6 31.1 31.8 20 30.8 30.3 30.0 29.5 29.3 28.8 28.7 27.7 27.7 27.1 27.4 26.9 25.8 26.1 26.1 26.1 26.6 26.9 26.4 26.4 26.6 27.2 26.9 26.6 27.6 30.8 21 26.4 26.2 25.9 26.4 25.9 25.9 26.2 27.0 28.1 28.1 28.1 28.4 28.4 27.9 28.2 28.2 28.2 27.9 28.0 28.0 29.0 28.9 29.7 29.3 27.7 29.7 22 29.3 29.0 29.0 28.0 28.2 27.9 28.4 29.7 29.9 29.1 29.3 29.0 27.4 29.0 29.5 27.8 27.5 27.7 29.1 27.1 28.5 27.9 27.3 27.2 28.4 29.9 23 26.7 26.8 26.2 24.7 24.2 24.0 24.0 23.8 23.5 23.2 23.7 23.7 22.9 23.7 22.6 22.9 22.6 22.9 22.9 23.4 22.3 21.8 22.9 20.2 23.6 26.8 24 22.3 21.0 20.5 20.2 20.0 20.9 20.9 20.0 20.0 20.0 19.8 20.8 21.1 23.3 24.1 24.7 24.7 25.2 24.4 24.4 24.4 24.0 23.8 24.5 22.3 25.2 25 24.5 24.3 25.1 25.2 23.8 24.3 23.7 23.5 23.7 22.9 22.4 23.2 22.0 21.8 22.6 22.9 22.6 23.1 23.9 23.4 23.3 23.3 23.4 23.8 23.5 25.2 26 23.9 24.5 24.6 24.7 24.4 23.8 24.6 24.0 24.0 24.3 24.5 24.5 24.5 24.5 25.0 25.0 25.5 25.2 25.7 25.5 25.7 25.9 26.5 27.0 24.9 27.0 27 26.5 26.5 26.5 26.3 26.5 26.5 26.5 26.5 26.3 26.5 26.5 26.5 26.5 26.3 26.5 26.5 27.8 27.8 27.6 26.4 26.4 26.4 26.4 26.2 26.6 27.8 28 27.0 26.2 26.7 26.0 26.0 25.7 25.1 25.9 25.1 24.8 24.3 25.1 24.8 25.6 25.9 26.5 27.5 27.5 27.5 27.3 27.3 27.6 28.3 28.7 26.4 28.7 29 28.4 28.2 27.9 29.0 28.5 28.7 29.0 29.0 28.4 29.0 28.4 28.7 28.1 28.7 27.3 27.6 27.0 27.3 27.0 26.2 27.0 27.5 27.3 27.3 28.0 29.0 30 27.3 27.0 26.8 27.1 27.2 27.1 27.1 27.1 27.9 27.7 27.7 28.2 27.6 27.9 27.1 26.8 27.6 27.6 27.9 27.9 28.7 28.1 28.7 28.4 27.6 28.7 31 28.3 28.3 28.3 27.7 28.5 28.5 27.7 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.3 26.2 26.2 26.2 26.2 26.2 27.6 27.6 27.6 27.0 28.5 MEAN 29.4 29.2 29.1 29.0 28.9 29.0 28.9 28.7 28.8 28.9 28.8 29.0 28.7 28.9 29.0 29.0 29.2 29.2 29.1 28.9 29.1 29.2 29.2 29.2 29.0 30.7 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH NOVEMBER YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 27.5 27.5 26.2 26.2 26.2 26.2 27.5 26.2 26.2 26.2 26.2 27.5 26.2 26.2 26.2 26.2 26.2 26.2 26.2 26.2 26.2 26.2 26.2 26.2 26.4 27.5 2 26.1 26.1 24.7 26.1 26.1 26.1 24.7 26.1 26.1 26.1 26.1 24.7 23.4 23.4 22.0 22.0 20.6 20.6 20.6 20.6 22.0 22.0 23.4 23.4 23.9 26.1 3 23.2 23.2 24.5 24.5 24.5 24.5 24.5 24.5 24.5 24.5 24.5 24.5 23.2 24.5 24.5 23.2 24.5 23.2 23.2 24.5 24.5 23.2 24.6 24.6 24.1 24.6 4 24.4 24.4 24.4 24.4 24.4 24.4 23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 23.0 21.7 21.7 23.0 23.0 23.0 23.0 23.0 23.0 23.2 24.4 5 22.8 22.8 24.2 24.2 24.2 24.2 24.2 24.2 24.2 24.2 25.6 25.6 25.6 25.6 25.6 25.6 25.6 25.6 26.9 26.9 27.0 27.0 25.6 25.6 25.1 27.0 6 24.7 24.2 24.1 24.7 24.9 26.0 26.5 26.5 27.0 27.3 27.6 27.8 28.6 29.7 30.5 30.2 30.2 29.1 29.4 30.4 30.6 30.6 31.4 31.4 28.1 31.4 7 30.6 30.6 30.6 30.6 32.0 32.0 32.0 33.3 33.3 33.3 33.3 32.0 30.7 30.7 30.7 32.0 32.0 32.0 32.0 32.0 32.0 32.0 32.0 30.7 31.8 33.3 8 30.7 30.7 30.7 30.7 30.7 30.7 30.8 30.8 30.8 30.8 30.8 30.8 32.1 30.8 33.4 33.4 33.4 33.5 33.5 33.5 33.5 33.5 33.5 33.5 31.9 33.5 9 33.5 33.5 33.5 32.2 32.2 32.2 32.2 30.9 30.9 30.9 30.9 30.9 30.9 30.9 30.9 30.9 30.9 30.9 29.6 29.6 29.6 30.9 30.9 30.9 31.3 33.5 10 30.9 30.9 30.9 30.9 29.6 29.6 30.9 31.0 31.0 32.3 32.3 32.3 31.0 31.0 29.6 28.3 29.7 31.0 31.0 32.3 32.3 33.7 33.7 33.7 31.2 33.7 11 33.7 33.7 32.4 32.4 33.7 33.7 32.4 32.4 32.4 32.4 32.4 32.4 32.4 32.4 32.4 32.4 32.4 32.4 31.1 31.1 32.4 32.4 33.8 33.8 32.6 33.8 12 33.8 33.8 33.8 33.8 33.8 33.8 33.8 33.8 32.5 32.5 31.1 31.1 31.1 29.8 29.8 28.5 28.5 28.5 28.5 28.5 28.5 28.5 28.5 28.5 31.0 33.8 13 28.5 28.5 28.5 28.5 29.8 29.9 29.9 29.9 28.5 28.5 28.5 28.5 28.5 28.5 28.5 27.2 27.2 25.9 27.2 27.2 27.2 28.6 28.6 29.4 28.4 29.9 14 28.9 28.1 29.2 29.6 29.6 29.9 30.1 30.4 31.5 31.0 30.5 29.7 30.2 30.2 30.5 30.5 30.2 30.5 30.7 30.7 30.7 30.9 31.4 31.7 30.3 31.7 15 31.4 31.1 31.1 30.9 30.3 29.8 30.0 30.6 30.9 31.7 32.0 32.5 32.8 33.0 33.6 33.8 34.1 33.8 34.1 33.5 33.3 33.3 32.2 32.0 32.2 34.1 16 31.7 32.0 31.6 30.9 30.1 30.3 30.3 30.8 31.1 31.9 32.2 32.2 32.3 32.3 32.5 32.5 32.0 32.0 32.0 32.0 31.5 30.7 30.4 30.7 31.5 32.5 17 30.4 30.4 29.9 30.2 30.2 30.4 32.0 32.0 31.4 32.0 31.7 31.2 30.4 30.2 30.9 30.9 31.4 31.2 30.6 30.3 30.0 30.3 30.3 30.0 30.8 32.0 18 30.5 30.8 31.4 31.5 32.0 33.0 33.2 32.7 33.0 33.5 34.3 34.6 34.9 35.2 35.4 35.7 36.2 36.4 36.9 37.4 37.1 37.7 37.6 37.9 34.6 37.9 19 37.9 38.2 38.2 38.0 37.2 36.4 36.3 35.8 35.8 35.8 35.8 35.0 34.5 34.5 34.5 34.2 34.0 34.8 35.0 35.0 35.5 36.3 36.6 37.1 35.9 38.2 20 36.6 36.6 36.8 37.4 37.4 37.6 37.9 38.2 38.5 38.5 38.5 38.2 38.0 38.0 37.7 37.4 36.9 36.6 36.1 36.1 35.8 35.1 35.1 34.8 37.1 38.5 21 35.1 34.8 34.9 34.7 34.7 33.1 31.4 30.1 29.8 31.1 30.6 30.9 30.3 31.2 33.0 33.5 33.8 33.2 33.2 34.0 34.3 33.8 32.7 32.7 32.8 35.1 22 31.9 31.9 31.9 35.0 37.7 39.8 39.7 39.4 38.4 35.8 36.1 33.6 32.3 31.2 32.3 33.3 34.0 34.8 34.8 35.6 35.6 35.6 34.7 34.0 35.0 39.8 23 33.5 31.9 31.9 31.2 30.1 30.7 28.8 30.9 28.3 29.9 30.0 29.2 28.9 29.0 28.9 29.7 30.3999.9999.9999.9999.9999.9999.9999.9 30.2 33.5 24 32.6 32.8 32.6 32.5 32.2 32.2 31.9 31.6 30.9 30.4 30.4 29.3 29.8 32.0 31.4 31.4 33.3 34.3 35.6 35.1 35.7 36.5 36.5 36.2 32.8 36.5 25 35.6 34.3 34.3 32.7 32.2 31.9 32.2 31.4 30.6 30.7 30.4 31.2 32.8 32.8 32.8 33.6 33.6 34.7 35.7 35.5 35.7 36.8 39.4 39.1 33.7 39.4 26 39.6 39.2 36.6 36.1 35.6 35.9 35.6 35.1 35.9 36.8 37.3 36.5 35.7 36.0 37.1 36.3 35.7 35.4 35.7999.9999.9999.9999.9999.9 36.4 39.6 27 999.9999.9999.9999.9999.9 32.0 32.3 32.9 33.2 34.3 35.0 35.3 35.6 35.5 35.1 34.8 34.5 33.3 32.7 28.1 23.9 21.3 21.1 21.7 31.2 35.6 28 22.3 22.6 22.6 21.3 20.9 21.3 21.9 21.9 21.6 21.6 21.9 21.6 21.9 22.5 22.8 23.1 23.4 23.2 23.1 23.3 22.5 21.4 22.9 22.3 22.2 23.4 29 22.0 22.7 23.6 23.2 22.3 23.1 23.2 23.1 22.9 21.7 21.1 22.4 24.0 22.0 25.2 23.7 24.1 24.3 24.8 24.9 24.9 25.3 25.9 26.7 23.6 26.7 30 28.3 30.7 32.3 33.3 34.1 33.4 32.3 32.7 32.4 31.3 29.1 26.5 25.7 26.2 27.7 28.2 27.9 27.6 30.1 30.5 30.8 31.4 31.3 30.7 30.2 34.1 MEAN 30.3 30.3 30.3 30.3 30.3 30.5 30.4 30.4 30.2 30.3 30.3 30.0 29.9 29.9 30.3 30.2 30.3 30.2 30.5 30.3 30.2 30.3 30.5 30.4 30.3 32.7 MIXING RATIO OF SURFACE OZONE IN PARTS PER BILLION STATION SOUTH POLE MONTH DECEMBER YEAR 1997 EQUIPMENT DASIBI GMT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 MEAN MAX DATE 1 30.9 30.1 28.1 26.8 26.4 26.7 27.0 27.5 28.4 29.2 29.6 30.2 30.8 31.1 31.2 31.2 31.1 30.5 29.2 28.7 28.2 28.0 28.0 27.7 29.0 31.2 2 27.9 27.9 27.7 27.5 27.2 26.7 26.5 26.1 25.5 24.7 24.9 24.9 25.3 25.6 24.4 24.4 24.1 23.2 22.3 21.6 21.8 22.0 21.8 22.0 24.8 27.9 3 21.4 22.4 23.8 26.2 27.4 27.9 28.6 29.4 30.4 31.1 31.5 31.8 31.6 31.7 32.3 32.7 33.1 33.6 34.0 32.6 30.1 29.0 28.5 28.1 29.6 34.0 4 27.5 25.9 25.2 24.8 24.5 24.8 24.6 24.2 23.9 24.2 24.2 24.1 23.7 24.8 24.0 22.9 22.2 22.6 21.9 22.2 22.5 23.1 24.4 25.0 24.1 27.5 5 25.3 26.0 26.8 27.4 27.1 27.7 28.0 27.8 26.8 25.2 25.1 24.1 22.9 22.1 22.1 21.8 22.1 22.1 21.6 21.8 21.7 21.9 21.8 21.9 24.2 28.0 6 22.1 22.1 22.3 23.0 23.0 23.6 24.5 24.9 25.6 26.4 27.1 27.4 26.9 26.8 24.7 23.0 22.4 22.8 22.9 23.7 23.8 24.1 24.2 24.4 24.2 27.4 7 24.8 25.0 24.8 24.5 24.6 25.2 25.6 25.6 25.9 26.2 26.1 25.8 25.7 26.1 26.4 26.7 27.1 27.4 27.7 28.0 28.6 28.7 28.3 27.6 26.4 28.7 8 27.3 27.1 26.7 26.8 28.0 30.9 33.4 36.7 35.1 35.2 33.3 32.7 32.5 25.5 23.7 27.6 28.9 28.3 27.9 28.4 28.1 27.6 27.6 27.9 29.5 36.7 9 27.9 27.9 27.9 27.8 27.4 27.3 27.2 27.0 26.8 27.4 28.2 29.1 30.3 31.3 32.3 33.5 35.4 36.7 37.3 36.8 35.9 34.1 33.4 32.4 30.9 37.3 10 32.1 31.5 27.5 26.4 28.9 24.2 21.3 21.5 22.0 21.6 20.7 20.8 21.0 20.5 20.7 21.0 21.0 22.1 23.1 23.6 25.5 27.1 27.3 27.9 24.1 32.1 11 27.8 27.7 28.3 31.3 34.9 36.4 37.2 35.3 32.5 31.4 29.6 30.1 29.8 29.2 28.6 28.4 28.5 27.3 26.7 27.7 31.1 33.0 32.7 30.9 30.7 37.2 12 30.6 31.3 32.7 32.5 31.1 30.2 28.8 28.9 30.1 31.9 33.1 33.0 32.7 31.9 31.9 32.5 32.7 32.4 32.2 32.8 33.8 34.0 34.2 33.1 32.0 34.2 13 33.6 33.0 32.2 31.5 30.8 30.5 30.5 30.5 30.6 30.8 30.8 30.9 30.8 30.9 30.9 30.6 30.1 30.1 30.1 29.8 30.3 30.3 30.8 31.1 30.9 33.6 14 31.2 31.5 31.8 31.7 32.2 32.9 33.1 33.4 33.8 33.4 30.2 27.6 26.8 24.9 25.0 26.0 24.8 22.8 22.0 22.2 22.6 22.7 24.9 24.2 28.0 33.8 15 25.1 25.6 26.3 27.1 27.6 28.3 28.6 28.6 28.6 28.5 28.7 28.9 28.0 26.4 21.0 20.2 20.1 20.1 19.8 19.9 19.7 19.6 19.9 20.0 24.4 28.9 16 20.7999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9999.9 25.2 25.2 22.2999.9999.9 17 20.0 19.4 19.1 20.0 19.8 20.2 22.9 22.9 24.5 25.5 25.4 24.5 22.3 23.3 21.4 21.3 20.3 20.6 20.4 19.9 20.1 20.0 19.7 18.4 21.3 25.5 18 18.3 18.1 18.6 19.2 19.1 18.8 19.1 19.0 19.0 18.7 18.4 17.7 16.8 16.6 16.9 17.9 18.8 20.3 22.7 22.0 21.8 21.5 21.9 21.9 19.3 22.7 19 22.6 23.1 24.2 24.3 24.0 24.0 24.6 24.8 25.5 27.6 28.2 28.5 29.1 29.2 29.5 29.5 29.3 29.3 29.0 28.6 28.2 28.1 27.9 27.6 27.0 29.5 20 28.9 28.2 27.6 27.2 26.5 24.4 21.1 20.5 19.7 18.8 18.4 18.4 18.2 18.4 19.0 19.3 19.5 20.3 21.3 21.7 21.5 20.5 20.5 21.7 21.7 28.9 21 22.8 22.9 23.2 22.4 23.3 23.6 24.2 24.3 24.0 23.3 22.1 21.5 22.7 20.2 19.5 19.3 18.9 18.7 18.3 18.1 17.7 17.8 18.0 18.0 21.0 24.3 22 17.7 17.7 17.8 18.1 18.3 18.4 18.2 18.1 18.3 18.2 18.2 18.2 18.4 18.6 18.4 18.5 19.1 19.2 19.4 19.2 19.5 19.3 19.2 19.0 18.5 19.5 23 19.0 20.6 25.6 24.6 23.2 22.9 23.5 23.0 23.0 23.3 23.0 22.7 22.4 22.2 21.9 22.6 23.2 23.0 23.0 23.1 23.8 24.2 24.8 25.4 23.1 25.6 24 25.9 26.8 27.6 28.3 28.5 29.1 29.0 30.0 29.2 29.1 29.1 29.5 29.3 28.7 28.3 28.1 28.0 28.3 29.1 29.3 29.4 29.3 29.2 29.1 28.7 30.0 25 27.6 26.1 25.1 23.6 23.5 23.7 25.0 26.5 27.3 28.2 30.4 32.4 33.1 32.2 32.2 32.9 32.9 31.9 31.7 32.2 33.5 34.5 35.0 35.0 29.9 35.0 26 34.6 34.0 33.5 33.2 33.2 33.3 33.3 33.3 33.3 33.7 34.2 34.6 34.8 34.6 35.3 34.1 31.4 29.9 29.9 28.8 29.4 29.4 29.5 29.1 32.5 35.3 27 26.5 23.5 24.8 24.5 24.9 25.4 27.2 26.7 24.0 24.0 24.6 27.1 27.9 28.0 28.0 27.9 27.8 27.7 27.4 26.4 25.8 26.4 24.9 25.0 26.1 28.0 28 24.7 25.4 25.5 26.2 27.0 27.7 28.5 29.9 31.5 36.3 34.6 37.0 38.2 36.6 33.8 31.7 31.0 30.2 28.5 27.7 28.0 29.2 30.0 30.3 30.4 38.2 29 29.9 29.2 28.7 28.1 27.5 27.2 27.3 27.2 26.7 25.1 25.3 25.4 25.4 25.1 25.1 24.6 24.6 24.6 25.0 25.0 24.7 24.6 24.3 24.0 26.0 29.9 30 24.0 23.7 23.4 23.4 22.9 23.2 23.2 23.5 23.5 23.5 23.5 23.9 23.8 23.6 23.1 22.8 22.8 22.2 22.2 22.0 22.0 22.0 22.1 23.4 23.1 24.0 31 19.5 21.6 18.8 18.2 17.7 22.2 17.7 18.1 17.8 18.8 20.8 22.1 20.6 18.7 18.3 18.2 18.3 18.0 20.6 20.6 20.2 20.3 20.6 20.6 19.5 22.2 MEAN 25.7 25.8 25.9 25.9 26.0 26.2 26.3 26.5 26.5 26.7 26.6 26.8 26.7 26.2 25.6 25.7 25.6 25.5 25.6 25.5 25.6 25.7 25.8 25.6 26.0 29.9