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 02 1997 07 02 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 34 007 64.84 147.56 0.0 308.2 2.3 5.4 1.8 57587 15 59 47 2.693 310.3 3.9 0.9 1.5 5 58839 16 20 39 2.464 311.2 1.4 1.7 0.1 5 59353 16 29 13 2.381 309.9 1.0 2.1 0.6 5 59866 16 37 46 2.304 310.1 1.2 2.5 0.3 5 60992 16 56 32 2.152 309.7 1.8 3.0 0.5 5 61505 17 05 05 2.091 309.3 1.4 3.2 0.5 5 62018 17 13 38 2.033 309.9 0.9 3.3 0.4 5 64092 17 48 12 1.836 306.5 0.9 4.2 0.2 5 64780 17 59 40 1.781 306.6 2.2 5.5 0.8 5 65298 18 08 18 1.743 308.9 1.8 5.1 0.6 5 65985 18 19 45 1.696 307.8 1.8 5.6 0.5 5 66672 18 31 12 1.653 303.7 1.1 7.1 0.5 5 67191 18 39 51 1.623 300.1 4.5 8.2 1.1 5 67877 18 51 17 1.587 305.8 2.0 7.2 0.6 5 68564 19 02 44 1.554 307.0 1.8 7.4 0.4 5 70275 19 31 15 1.483 309.6 0.6 5.1 0.1 5 71253 19 47 33 1.451 309.6 1.8 4.9 0.6 5 71771 19 56 11 1.435 309.8 1.9 5.1 0.8 5 72457 20 07 37 1.416 309.1 2.2 5.4 0.5 5 73435 20 23 55 1.394 307.0 1.6 6.3 0.6 5 73952 20 32 32 1.384 307.2 0.8 6.0 0.2 5 74638 20 43 58 1.372 307.0 1.3 6.7 0.2 5 75616 21 00 16 1.358 308.2 1.4 6.4 0.5 5 76133 21 08 53 1.352 306.9 2.1 6.9 0.6 5 76819 21 20 19 1.346 306.6 1.3 7.3 0.5 5 77797 21 36 37 1.341 306.4 2.6 7.2 0.7 5 78314 21 45 14 1.339 306.9 2.0 7.1 0.6 5 80298 22 18 18 1.342 308.2 2.9 6.4 0.9 5 81277 22 34 37 1.349 307.1 2.4 6.4 0.6 5 81794 22 43 14 1.355 309.8 1.5 5.8 0.6 5 82479 22 54 39 1.363 310.8 2.7 5.9 0.3 5 83458 23 10 58 1.378 311.9 1.7 5.4 0.6 5 83975 23 19 35 1.388 310.3 1.0 5.0 0.4 5 84660 23 31 00 1.402 308.0 1.0 5.8 0.3 5