55 2160 McElroy, Tom;Midwinter, Clive;Barton, David;Hall, Bob;Kerr, James;Wardle, David ENVIRONMENT CANADA, Dowsview, Ontario, CANADA M3H 5T4 (416) 739-4630 Brewer Ozone Spectrophotometer data at Fairbanks ( 64.84, 147.56) POLARIS 1 1 1997 06 22 1997 06 22 0 13 elapsed time in UT seconds from 0000 hours on the day given in DATE Station name 9 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 99 99 99 999 999 999 999 999 999 hour minute second airmass ozone [DU] (Dobson Units) ozone error [DU] (Dobson Units) SO2 [DU] (Dobson Units) SO2 error [DU] (Dobson Units) Number of data points in row 9 0 1 1 1 1 1 1 1 1 1 99 9999 999 999 99999 999 999 999 999 number of observations instrument number station latitude (degrees) station longitude (degrees) station elevation (m) daily mean O3 [DU] (Dobson Units) daily mean O3 error [DU] (Dobson Units) daily mean SO2 [DU] (Dobson Units) daily mean SO2 error [DU] (Dobson Units) 1 *** preliminary data *** 16 The Brewer Ozone Spectrophotometer is a 15-cm focal-length, modified Ebert-Fastie spectrograph which makes rapid, time-multiplexed measurements in the UV-B region of the solar spectrum. A typical direct sun observation is the average of 5 separate observations. If the standard deviation of the measurements is less than 2 DU, the measurement is taken as acceptable. If the standard deviation is larger, it is interpreted as indicating variability of the solar intensity, i.e.: clouds or other optical attenuation. Each of the five ozone measurements which contributes to the average value are composed of 40 short observation samples. A cycle of 2 samples on each of the five wavelengths takes place in about 1.2 seconds. The usual measurement of 20 cycles takes under 30 seconds. Daily averages are calcluted using all good observations and are reported as the last line in the data table. Fairbanks 36 007 64.84 147.56 0.0 319.2 1.5 3.8 2.9 52673 14 37 53 4.015 317.8 1.2 -5.4 0.7 5 53414 14 50 14 3.731 319.7 0.9 -3.4 0.2 5 54613 15 10 13 3.338 321.2 0.5 -1.8 0.4 5 55354 15 22 34 3.130 320.7 0.9 -0.6 0.2 5 56554 15 42 34 2.839 319.4 0.8 0.5 0.2 5 58567 16 16 07 2.453 320.6 1.2 0.9 0.4 5 59105 16 25 05 2.367 320.2 0.6 1.5 0.2 5 59644 16 34 04 2.287 319.9 0.8 1.2 0.4 5 60876 16 54 36 2.125 319.3 0.9 2.4 0.5 5 61414 17 03 34 2.062 318.2 0.9 2.8 0.3 5 61952 17 12 32 2.003 317.1 1.5 3.3 0.5 5 63750 17 42 30 1.835 316.6 0.7 3.7 0.1 5 64489 17 54 49 1.776 318.4 2.0 3.8 0.5 5 65027 18 03 47 1.737 318.9 1.5 4.2 0.6 5 65771 18 16 11 1.686 319.2 1.5 4.2 0.5 5 66512 18 28 32 1.641 317.9 1.6 5.1 0.3 5 67050 18 37 30 1.610 316.9 2.1 5.8 0.8 5 67794 18 49 54 1.572 318.2 1.0 6.0 0.4 5 69841 19 24 01 1.483 318.2 1.0 4.5 0.4 5 70885 19 41 25 1.447 320.1 0.6 4.7 0.4 5 71563 19 52 43 1.427 320.3 2.8 4.8 0.9 5 72343 20 05 43 1.406 319.9 1.4 5.0 0.4 5 73394 20 23 14 1.382 317.3 1.9 5.4 0.3 5 73936 20 32 16 1.372 318.1 1.8 5.2 0.5 5 74682 20 44 42 1.359 318.7 1.8 5.2 0.5 5 75726 21 02 06 1.346 321.8 3.8 4.9 1.1 5 76267 21 11 07 1.340 319.8 2.1 5.3 0.3 5 77014 21 23 34 1.335 318.9 2.0 5.5 0.6 5 78058 21 40 58 1.330 320.8 1.9 5.8 0.7 5 78600 21 50 00 1.330 314.9 2.4 6.6 0.6 5 81484 22 38 04 1.343 320.7 1.4 6.0 0.2 5 82528 22 55 28 1.355 321.0 2.7 6.4 0.8 5 83065 23 04 25 1.363 320.9 1.8 6.4 0.4 5 83808 23 16 48 1.377 319.6 3.5 6.6 1.0 5 84852 23 34 12 1.400 319.7 1.7 6.6 0.5 5 85389 23 43 09 1.413 320.0 1.1 6.6 0.2 5