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 28 1997 06 28 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 47 007 64.84 147.56 0.0 313.8 3.1 5.2 1.8 57436 15 57 16 2.689 313.4 1.0 0.5 0.3 5 58670 16 17 50 2.463 313.0 0.6 1.4 0.3 5 59185 16 26 25 2.380 312.4 0.9 1.8 0.4 5 59700 16 35 00 2.303 313.5 1.1 1.9 0.3 5 60828 16 53 48 2.151 312.7 0.8 2.6 0.3 5 61343 17 02 23 2.089 312.9 1.0 2.7 0.3 5 61857 17 10 57 2.031 311.1 0.3 3.1 0.2 5 63910 17 45 10 1.836 310.6 1.3 3.5 0.4 5 64598 17 56 38 1.781 308.6 1.2 4.8 0.4 5 65112 18 05 12 1.743 311.0 2.2 5.0 0.7 5 65795 18 16 35 1.696 309.6 2.6 5.6 0.7 5 66478 18 27 58 1.653 309.7 2.0 6.0 0.6 5 66992 18 36 32 1.623 309.5 2.2 6.5 0.4 5 67675 18 47 55 1.587 308.3 4.2 7.2 1.1 5 68358 18 59 18 1.553 307.4 1.8 7.7 0.7 5 70037 19 27 17 1.484 312.9 1.5 5.1 0.4 5 71012 19 43 32 1.450 314.0 1.2 5.6 0.4 5 71525 19 52 05 1.435 312.8 2.1 5.8 0.6 5 72207 20 03 27 1.416 311.4 1.9 6.4 0.6 5 73182 20 19 42 1.393 310.7 1.5 6.8 0.4 5 73695 20 28 15 1.382 311.2 1.0 6.5 0.4 5 74377 20 39 37 1.370 309.9 2.4 7.2 0.5 5 75351 20 55 51 1.355 313.1 2.4 6.6 0.7 5 75864 21 04 24 1.349 312.0 2.4 7.0 0.4 5 76545 21 15 45 1.343 313.0 2.4 7.1 0.6 5 77519 21 31 59 1.336 311.9 4.3 7.5 0.9 5 78032 21 40 32 1.334 312.8 1.5 7.5 0.4 5 81100 22 31 40 1.342 316.8 1.5 5.7 0.5 5 82074 22 47 54 1.353 316.7 1.0 5.9 0.3 5 82587 22 56 27 1.359 317.6 1.9 5.5 0.6 5 83269 23 07 49 1.370 316.8 1.8 5.6 0.5 5 84243 23 24 03 1.388 317.3 0.6 5.6 0.2 5 84756 23 32 36 1.400 315.2 2.1 5.6 0.8 5 85436 23 43 56 1.417 314.6 1.7 5.9 0.6 5 86418 24 00 18 1.444 315.0 2.6 6.1 0.8 5 86936 00 08 56 1.461 315.5 2.2 6.1 0.6 5 87618 00 20 18 1.485 315.1 1.8 6.2 0.4 5 88593 00 36 33 1.524 316.0 1.1 5.7 0.2 5 89107 00 45 07 1.547 316.6 1.3 5.3 0.5 5 90603 01 10 03 1.622 318.1 1.7 4.4 0.4 5 91578 01 26 18 1.680 319.9 0.8 4.7 0.3 5 92093 01 34 53 1.714 317.3 1.4 5.4 0.6 5 92780 01 46 20 1.763 316.4 0.9 4.8 0.3 5 93761 02 02 41 1.840 317.3 0.9 4.7 0.3 5 94279 02 11 19 1.885 317.5 0.9 4.9 0.4 5 94966 02 22 46 1.950 317.7 1.2 4.6 0.4 5 101691 04 14 51 3.027 320.6 3.6 1.2 2.8 5