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 12 1997 07 12 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 32 007 64.84 147.56 0.0 328.1 2.5 4.4 1.6 62669 17 24 29 2.034 322.1 3.2 2.7 1.6 5 64773 17 59 33 1.836 329.1 4.0 2.1 1.4 5 65460 18 11 00 1.782 329.0 2.2 2.0 0.3 5 65980 18 19 40 1.745 325.4 2.2 3.1 0.5 5 66666 18 31 06 1.699 326.7 2.1 3.1 0.7 5 67353 18 42 33 1.657 326.8 2.2 3.5 0.7 5 67872 18 51 12 1.628 326.2 0.6 4.0 0.2 5 68556 19 02 36 1.593 325.8 1.0 4.4 0.3 5 69238 19 13 58 1.561 327.6 1.7 5.1 0.5 5 71217 19 46 57 1.484 325.6 2.0 5.0 0.4 5 72190 20 03 10 1.454 327.9 2.1 5.7 0.4 5 72703 20 11 43 1.440 329.4 3.2 5.3 0.8 5 73390 20 23 10 1.423 326.7 1.7 5.9 0.5 5 74368 20 39 28 1.403 326.9 1.0 6.0 0.4 5 74891 20 48 11 1.394 320.5 3.2 7.4 0.8 5 75576 20 59 36 1.384 327.4 1.8 6.2 0.6 5 77072 21 24 32 1.369 327.4 1.5 6.5 0.5 5 77757 21 35 57 1.365 329.7 0.7 6.6 0.4 5 78736 21 52 16 1.363 330.7 2.0 6.3 0.5 5 79254 22 00 54 1.363 328.7 0.7 6.4 0.2 5 80231 22 17 11 1.365 329.3 1.4 6.2 0.2 5 84594 23 29 54 1.426 330.7 3.3 3.9 1.3 5 85112 23 38 32 1.438 329.4 2.6 4.0 0.6 5 85797 23 49 57 1.457 329.7 1.4 4.4 0.4 5 86807 24 06 47 1.488 328.0 3.5 4.3 1.0 5 87326 00 15 26 1.507 327.7 2.4 4.6 0.7 5 89905 00 58 25 1.622 331.7 1.6 3.2 0.4 5 90884 01 14 44 1.678 331.3 1.4 3.4 0.4 5 91403 01 23 23 1.711 331.2 2.9 3.0 0.7 5 92089 01 34 49 1.758 330.9 3.1 3.4 0.7 5 94275 02 11 15 1.939 331.5 2.4 3.3 0.9 5 101105 04 05 05 3.028 329.3 2.6 0.7 0.8 5