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 07 18 1997 07 18 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 45 007 64.84 147.56 0.0 305.5 3.1 5.9 2.5 58857 16 20 57 2.675 305.9 0.6 1.0 0.4 5 60015 16 40 15 2.463 306.0 1.3 2.0 0.5 5 60530 16 48 50 2.380 305.7 1.0 1.9 0.4 5 61045 16 57 25 2.302 305.7 1.0 2.4 0.5 5 62171 17 16 11 2.152 306.5 1.2 2.8 0.5 5 62685 17 24 45 2.091 305.2 0.6 3.3 0.2 5 63199 17 33 19 2.034 303.9 1.1 3.6 0.2 5 65332 18 08 52 1.836 305.0 0.9 3.5 0.3 5 66013 18 20 13 1.784 306.2 1.9 3.7 0.5 5 66528 18 28 48 1.747 304.4 0.3 3.8 0.3 5 67211 18 40 11 1.703 303.8 2.0 4.1 0.5 5 67893 18 51 33 1.662 304.0 2.5 4.4 0.5 5 68408 19 00 08 1.634 303.3 1.1 4.7 0.3 5 69090 19 11 30 1.600 302.9 0.8 4.9 0.3 5 69772 19 22 52 1.568 303.9 2.0 4.9 0.3 5 70286 19 31 26 1.547 302.7 1.9 5.7 0.5 5 72051 20 00 51 1.484 303.1 2.1 5.5 0.6 5 73024 20 17 04 1.457 302.2 1.2 6.2 0.3 5 73537 20 25 37 1.445 303.5 1.6 6.1 0.5 5 74219 20 36 59 1.430 302.0 2.3 6.4 0.6 5 75192 20 53 12 1.413 302.0 1.6 6.9 0.5 5 75705 21 01 45 1.406 301.5 2.1 7.0 0.6 5 76386 21 13 06 1.397 300.9 1.4 7.7 0.5 5 77360 21 29 20 1.389 302.4 1.8 7.3 0.7 5 77873 21 37 53 1.387 301.5 1.3 8.0 0.6 5 78554 21 49 14 1.385 301.7 0.9 8.2 0.3 5 79528 22 05 28 1.385 303.1 3.9 8.8 1.0 5 80502 22 21 42 1.389 305.2 1.8 9.2 0.5 5 81015 22 30 15 1.392 306.5 1.5 8.9 0.4 5 81697 22 41 37 1.399 305.4 1.2 9.0 0.3 5 82671 22 57 51 1.412 305.2 1.7 9.2 0.6 5 83184 23 06 24 1.420 305.6 1.7 9.3 0.3 5 83865 23 17 45 1.433 307.1 1.8 9.2 0.7 5 84838 23 33 58 1.454 306.0 1.2 9.6 0.4 5 85352 23 42 32 1.468 307.2 1.6 9.1 0.4 5 86033 23 53 53 1.488 306.8 1.0 9.0 0.3 5 87019 00 10 19 1.522 305.7 1.5 9.4 0.4 5 87532 00 18 52 1.541 306.1 1.1 9.3 0.3 5 89308 00 48 28 1.621 313.4 1.3 4.4 0.4 5 90287 01 04 47 1.675 311.5 1.7 4.6 0.4 5 90806 01 13 26 1.707 311.8 1.9 4.3 0.5 5 91493 01 24 53 1.752 310.6 1.6 4.9 0.4 5 92472 01 41 12 1.825 311.1 1.3 4.1 0.4 5 92992 01 49 52 1.867 310.3 1.5 4.2 0.4 5 93679 02 01 19 1.928 311.2 1.0 4.0 0.4 5