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 15 1997 07 15 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 46 007 64.84 147.56 0.0 325.4 3.3 5.3 2.6 58657 16 17 37 2.661 321.5 1.0 0.4 0.4 5 59743 16 35 43 2.463 322.1 1.7 1.0 0.5 5 60258 16 44 18 2.380 321.7 0.5 1.4 0.2 5 60778 16 52 58 2.302 320.6 0.7 1.7 0.3 5 61907 17 11 47 2.151 322.1 0.8 2.3 0.5 5 62426 17 20 26 2.089 323.8 1.7 2.0 0.6 5 62940 17 29 00 2.032 325.0 2.0 2.0 0.9 5 65039 18 03 59 1.836 325.1 1.1 1.7 0.3 5 65726 18 15 26 1.782 324.3 1.5 2.4 0.7 5 66245 18 24 05 1.746 322.6 2.3 3.7 0.8 5 66932 18 35 32 1.700 322.4 0.9 3.6 0.3 5 67618 18 46 58 1.659 320.7 1.3 4.6 0.3 5 68136 18 55 36 1.630 320.4 1.0 4.9 0.4 5 68818 19 06 58 1.595 321.8 1.1 5.4 0.3 5 69497 19 18 17 1.564 322.5 1.7 5.8 0.2 5 71598 19 53 18 1.484 325.4 1.8 4.7 0.4 5 72573 20 09 33 1.455 327.1 2.1 4.9 0.7 5 73086 20 18 06 1.442 325.4 1.8 5.8 0.4 5 73768 20 29 28 1.427 325.6 1.3 6.0 0.2 5 74741 20 45 41 1.408 324.8 1.4 6.5 0.4 5 75254 20 54 14 1.400 323.9 1.4 6.8 0.4 5 75935 21 05 35 1.390 325.8 2.2 6.5 0.6 5 76909 21 21 49 1.381 324.6 1.4 7.0 0.4 5 77422 21 30 22 1.377 326.0 1.1 7.0 0.3 5 78103 21 41 43 1.374 326.0 1.9 7.2 0.7 5 79077 21 57 57 1.373 325.2 1.3 7.5 0.3 5 79288 22 01 28 1.373 325.8 3.5 7.2 0.5 5 80262 22 17 42 1.376 323.6 1.4 8.0 0.4 5 80775 22 26 15 1.379 323.3 1.4 8.4 0.2 5 81456 22 37 36 1.385 321.9 2.5 8.8 0.6 5 82429 22 53 49 1.396 324.6 1.6 8.3 0.4 5 82942 23 02 22 1.404 324.0 1.5 8.6 0.3 5 83623 23 13 43 1.416 324.3 1.6 8.6 0.4 5 84596 23 29 56 1.436 326.7 1.8 8.8 0.5 5 85110 23 38 30 1.449 326.1 1.9 9.0 0.5 5 85791 23 49 51 1.468 326.0 1.8 9.3 0.6 5 86796 24 06 36 1.500 327.4 1.1 8.5 0.3 5 87310 00 15 10 1.518 328.1 1.2 8.3 0.3 5 89627 00 53 47 1.621 334.0 2.1 3.7 0.6 5 90601 01 10 01 1.676 333.0 2.2 4.0 0.6 5 91116 01 18 36 1.708 332.1 0.5 4.0 0.2 5 91798 01 29 58 1.754 333.4 0.9 3.8 0.4 5 92779 01 46 19 1.827 329.2 1.2 3.9 0.5 5 93298 01 54 58 1.871 328.8 0.7 3.9 0.2 5 93986 02 06 26 1.932 329.4 0.8 3.8 0.2 5 100894 04 01 34 3.030 330.4 1.0 0.7 0.5 5