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 16 1997 07 16 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 0.0 326.4 3.3 5.1 2.1 58758 16 19 18 2.658 321.5 0.5 0.5 0.2 5 59832 16 37 12 2.463 322.1 2.0 0.9 0.7 5 60347 16 45 47 2.380 322.4 1.0 1.2 0.3 5 60862 16 54 22 2.302 322.3 0.8 1.7 0.4 5 61988 17 13 08 2.152 321.7 1.2 2.6 0.7 5 62502 17 21 42 2.091 322.9 1.1 2.5 0.4 5 63017 17 30 17 2.034 321.4 0.9 3.3 0.5 5 65133 18 05 33 1.836 323.3 1.5 3.1 0.4 5 65815 18 16 55 1.784 327.0 1.5 3.1 0.4 5 66330 18 25 30 1.746 325.9 1.1 3.6 0.3 5 67013 18 36 53 1.701 326.7 0.7 3.7 0.3 5 67694 18 48 14 1.660 324.7 2.7 4.5 0.6 5 68209 18 56 49 1.632 325.6 1.6 4.7 0.4 5 68891 19 08 11 1.598 326.1 1.1 5.2 0.3 5 69573 19 19 33 1.566 326.4 1.9 5.5 0.6 5 70087 19 28 07 1.544 328.8 0.9 5.4 0.3 5 71741 19 55 41 1.484 331.5 2.0 4.8 0.4 5 72715 20 11 55 1.456 333.3 2.2 4.7 0.6 5 73229 20 20 29 1.443 333.4 0.6 5.2 0.4 5 73911 20 31 51 1.428 332.2 2.0 5.6 0.6 5 74884 20 48 04 1.409 330.8 3.8 6.1 0.8 5 75398 20 56 38 1.402 331.4 1.9 6.4 0.7 5 76079 21 07 59 1.393 331.4 0.8 6.5 0.3 5 77566 21 32 46 1.380 329.4 1.9 7.5 0.5 5 78247 21 44 07 1.377 331.0 2.0 7.0 0.6 5 79220 22 00 20 1.376 330.6 3.2 7.5 1.0 5 80194 22 16 34 1.379 328.6 2.2 7.8 0.5 5 80707 22 25 07 1.382 327.2 2.0 7.8 0.7 5 81387 22 36 27 1.388 328.4 1.0 7.5 0.4 5 82361 22 52 41 1.399 327.1 1.6 7.5 0.5 5 82875 23 01 15 1.407 326.6 2.1 7.6 0.4 5 83556 23 12 36 1.418 325.5 2.0 7.8 0.5 5 84529 23 28 49 1.439 323.9 1.0 7.7 0.5 5 85043 23 37 23 1.452 322.7 1.7 8.2 0.4 5 85724 23 48 44 1.470 326.4 1.3 7.1 0.4 5 86730 24 05 30 1.502 325.1 2.5 7.3 0.6 5 87244 00 14 04 1.520 323.7 1.9 7.5 0.6 5 89526 00 52 06 1.621 326.3 1.5 5.2 0.3 5 90501 01 08 21 1.676 326.8 1.9 4.8 0.6 5 91016 01 16 56 1.708 326.9 1.2 4.6 0.4 5 91698 01 28 18 1.753 324.4 2.2 5.2 0.6 5 92678 01 44 38 1.826 322.8 1.2 4.9 0.2 5 93198 01 53 18 1.869 323.0 1.6 4.7 0.6 5 93885 02 04 45 1.931 324.7 1.3 4.0 0.4 5 100815 04 00 15 3.030 325.8 2.6 0.8 0.6 5