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 14 1997 07 14 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 35 007 64.84 147.56 0.0 321.4 4.1 3.9 1.9 60681 16 51 21 2.303 316.9 3.1 0.8 0.8 5 65634 18 13 54 1.782 319.5 3.4 0.4 0.7 5 66154 18 22 34 1.745 316.4 0.8 1.3 1.0 5 66841 18 34 01 1.700 318.1 1.5 1.5 0.8 5 67527 18 45 27 1.658 316.3 3.6 2.5 1.2 5 68045 18 54 05 1.630 318.4 1.3 2.1 0.6 5 68733 19 05 33 1.595 317.8 3.1 2.5 0.9 5 69419 19 16 59 1.562 317.5 2.1 3.5 0.6 5 71472 19 51 12 1.484 322.1 2.6 2.1 0.4 5 72450 20 07 30 1.455 319.6 2.7 3.2 0.7 5 72967 20 16 07 1.441 317.6 2.4 3.9 0.7 5 73652 20 27 32 1.425 323.7 2.9 2.3 0.6 5 74630 20 43 50 1.406 317.3 0.6 4.8 0.3 5 75148 20 52 28 1.397 320.4 1.4 4.4 0.2 5 76812 21 20 12 1.378 322.2 2.9 4.9 1.3 5 78993 21 56 33 1.369 321.0 2.0 4.8 0.5 5 79210 22 00 10 1.369 321.7 1.6 5.2 0.5 5 80183 22 16 23 1.372 323.4 3.6 5.1 0.9 5 80696 22 24 56 1.375 322.7 3.0 5.4 0.9 5 81378 22 36 18 1.380 323.1 2.1 5.3 0.5 5 82357 22 52 37 1.392 315.5 1.9 6.5 0.5 5 82874 23 01 14 1.399 320.6 1.8 5.9 0.7 5 83559 23 12 39 1.411 317.7 1.0 6.5 0.4 5 84538 23 28 58 1.431 318.8 1.3 6.6 0.4 5 85051 23 37 31 1.444 322.4 1.8 6.1 0.4 5 85737 23 48 57 1.462 316.8 1.1 7.6 0.2 5 86747 24 05 47 1.494 320.1 1.9 6.5 0.4 5 89729 00 55 29 1.622 324.1 2.0 4.2 0.4 5 90708 01 11 48 1.677 325.7 1.5 4.0 0.5 5 91227 01 20 27 1.710 327.3 1.3 3.6 0.4 5 91914 01 31 54 1.756 327.5 0.5 3.6 0.4 5 92893 01 48 13 1.830 328.0 1.0 3.6 0.5 5 93413 01 56 53 1.874 328.3 0.9 3.2 0.3 5 94100 02 08 20 1.936 330.8 1.1 2.7 0.3 5 100968 04 02 48 3.029 329.7 1.7 -0.6 0.5 5