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 01 1997 07 01 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 0.0 312.1 6.1 5.1 2.3 57638 16 00 38 2.674 306.6 3.6 0.4 1.2 5 58791 16 19 51 2.464 308.4 1.4 1.1 0.7 5 59305 16 28 25 2.381 307.3 0.9 1.6 0.4 5 59819 16 36 59 2.304 307.7 1.3 1.8 0.3 5 60944 16 55 44 2.152 306.9 1.1 2.8 0.3 5 61457 17 04 17 2.091 306.8 1.1 2.8 0.4 5 61971 17 12 51 2.033 301.7 4.8 3.2 1.0 5 64042 17 47 22 1.836 310.1 1.8 2.5 0.7 5 64729 17 58 49 1.781 308.4 2.0 3.6 0.8 5 65248 18 07 28 1.743 306.6 1.3 4.1 0.4 5 65934 18 18 54 1.696 307.6 2.6 4.5 0.9 5 66621 18 30 21 1.653 307.3 1.6 5.1 0.3 5 67140 18 39 00 1.623 307.2 0.4 5.5 0.3 5 67826 18 50 26 1.586 307.3 1.3 6.1 0.2 5 68513 19 01 53 1.553 306.4 0.5 6.8 0.1 5 70210 19 30 10 1.483 312.5 1.3 4.9 0.3 5 71188 19 46 28 1.450 308.7 1.9 6.4 0.5 5 71706 19 55 06 1.435 307.7 4.8 6.8 1.0 5 72392 20 06 32 1.416 308.4 1.5 7.1 0.5 5 73369 20 22 49 1.394 306.8 1.9 7.7 0.5 5 73887 20 31 27 1.383 307.4 1.2 7.9 0.2 5 74573 20 42 53 1.371 307.9 0.9 8.2 0.2 5 75550 20 59 10 1.357 308.0 2.3 8.2 0.4 5 76068 21 07 48 1.351 306.0 0.4 8.8 0.2 5 76753 21 19 13 1.345 306.4 2.3 9.1 0.6 5 77729 21 35 29 1.339 306.2 1.2 9.6 0.6 5 78247 21 44 07 1.338 307.1 0.8 9.5 0.4 5 80580 22 23 00 1.342 313.2 1.5 5.4 0.4 5 81558 22 39 18 1.351 314.0 3.1 5.7 0.8 5 82075 22 47 55 1.356 314.0 1.1 5.7 0.4 5 82761 22 59 21 1.365 313.3 2.2 6.0 0.5 5 83739 23 15 39 1.382 314.3 1.8 5.7 0.5 5 84257 23 24 17 1.392 315.5 1.6 5.8 0.7 5 84941 23 35 41 1.407 316.4 2.0 5.8 0.2 5 85920 23 52 00 1.433 316.2 1.9 5.6 0.4 5 86455 24 00 55 1.449 318.6 2.6 5.3 0.6 5 87146 00 12 26 1.472 318.3 1.3 5.0 0.2 5 88124 00 28 44 1.508 319.8 1.9 4.9 0.5 5 88642 00 37 22 1.530 319.2 0.7 5.0 0.4 5 90531 01 08 51 1.622 322.2 1.2 4.0 0.2 5 91515 01 25 15 1.681 321.5 2.5 4.0 0.6 5 92034 01 33 54 1.715 319.9 1.4 4.3 0.7 5 92722 01 45 22 1.764 321.2 2.1 3.8 0.5 5 93702 02 01 42 1.840 322.8 2.0 3.4 0.5 5 94221 02 10 21 1.885 322.3 2.5 3.4 0.6 5 94908 02 21 48 1.950 321.9 0.6 3.5 0.4 5 101621 04 13 41 3.026 325.6 3.7 -0.4 1.1 5