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 05 16 1997 05 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 39 007 64.84 147.56 0.0 379.0 3.9 3.3 2.2 59106 16 25 06 2.679 384.1 1.2 -1.8 0.4 5 60334 16 45 34 2.455 384.7 1.2 -0.9 0.5 5 60866 16 54 26 2.370 382.5 2.1 -0.1 0.9 5 61399 17 03 19 2.291 382.0 0.9 0.4 0.6 5 62616 17 23 36 2.133 382.0 0.9 0.9 0.2 5 63149 17 32 29 2.072 380.5 1.8 1.2 0.6 5 63681 17 41 21 2.015 379.9 0.9 1.6 0.3 5 65688 18 14 48 1.836 381.5 1.3 0.9 0.4 5 66426 18 27 06 1.782 379.6 1.6 1.5 0.5 5 66963 18 36 03 1.745 378.1 0.9 1.9 0.2 5 67702 18 48 22 1.700 375.1 1.4 2.5 0.5 5 68433 19 00 33 1.659 377.6 2.7 2.5 1.1 5 68965 19 09 25 1.633 375.8 0.9 3.1 0.2 5 69700 19 21 40 1.598 376.8 1.6 2.7 0.4 5 70433 19 33 53 1.568 374.9 2.6 3.6 0.7 5 70964 19 42 44 1.548 375.6 0.8 3.6 0.2 5 73092 20 18 12 1.485 376.2 1.5 3.0 0.5 5 74128 20 35 28 1.463 374.9 0.9 4.3 0.3 5 74660 20 44 20 1.453 377.0 2.1 3.9 0.7 5 75394 20 56 34 1.442 374.8 1.8 4.5 0.7 5 76431 21 13 51 1.431 377.1 1.6 4.3 0.4 5 76962 21 22 42 1.427 374.7 1.6 5.0 0.6 5 77697 21 34 57 1.424 376.2 1.5 5.1 0.4 5 78738 21 52 18 1.424 373.4 1.1 5.7 0.3 5 79772 22 09 32 1.427 374.7 1.4 5.6 0.4 5 80304 22 18 24 1.430 374.2 1.9 6.0 0.5 5 81037 22 30 37 1.438 375.5 2.3 5.8 0.8 5 82073 22 47 53 1.452 377.1 1.9 5.8 0.7 5 82604 22 56 44 1.461 376.6 1.9 6.5 0.5 5 83336 23 08 56 1.476 378.3 1.3 6.5 0.6 5 84371 23 26 11 1.501 379.1 3.4 6.4 1.1 5 84902 23 35 02 1.517 379.3 1.4 6.4 0.3 5 85637 23 47 17 1.540 380.5 1.5 5.8 0.7 5 87640 00 20 40 1.621 384.6 3.4 2.1 0.7 5 88682 00 38 02 1.675 378.9 1.4 3.1 0.5 5 89220 00 47 00 1.705 383.1 4.4 3.1 1.0 5 89960 00 59 20 1.752 388.4 1.6 1.7 0.6 5 91539 01 25 39 1.868 386.3 1.9 1.6 0.8 5 92279 01 37 59 1.931 387.9 1.4 1.0 0.4 5