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 24 1997 07 24 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 0.0 299.1 3.4 3.9 1.2 60619 16 50 19 2.464 298.4 3.6 0.8 2.2 5 61133 16 58 53 2.381 297.2 1.6 1.7 0.5 5 61647 17 07 27 2.304 296.4 1.6 1.9 0.3 5 62771 17 26 11 2.155 295.7 1.1 2.5 0.5 5 63284 17 34 44 2.094 295.8 1.0 2.8 0.3 5 63798 17 43 18 2.038 294.4 1.0 3.4 0.2 5 66003 18 20 03 1.836 297.0 1.2 2.5 0.3 5 66690 18 31 30 1.785 295.3 1.4 3.3 0.4 5 67209 18 40 09 1.749 296.0 0.9 3.5 0.3 5 67896 18 51 36 1.706 296.4 1.3 3.6 0.5 5 68583 19 03 03 1.666 296.4 2.5 4.1 0.6 5 69101 19 11 41 1.639 295.0 1.5 4.9 0.4 5 69788 19 23 08 1.605 295.9 1.5 5.2 0.3 5 70479 19 34 39 1.575 295.4 1.3 5.2 0.4 5 70998 19 43 18 1.555 294.9 0.8 5.4 0.2 5 73195 20 19 55 1.485 297.2 3.2 4.2 0.7 5 74173 20 36 13 1.462 297.1 2.0 4.3 0.7 5 74691 20 44 51 1.451 298.5 1.8 4.1 0.5 5 76355 21 12 35 1.427 300.7 1.3 4.0 0.4 5 76873 21 21 13 1.422 301.1 2.4 3.9 0.7 5 77560 21 32 40 1.416 299.0 3.5 4.5 0.8 5 79056 21 57 36 1.413 302.6 1.7 3.4 0.6 5 79273 22 01 13 1.413 301.6 2.3 3.7 0.5 5 80251 22 17 31 1.415 309.9 4.1 2.7 1.5 5 80769 22 26 09 1.419 305.8 2.8 3.0 0.7 5 82950 23 02 30 1.446 302.9 2.0 4.0 0.5 5 83637 23 13 57 1.458 300.0 1.8 5.0 0.4 5 84615 23 30 15 1.480 300.0 0.8 5.0 0.3 5 85133 23 38 53 1.494 302.3 2.4 4.4 0.5 5 85815 23 50 15 1.514 305.1 2.3 4.4 0.6 5 86821 24 07 01 1.549 301.9 2.4 5.2 0.7 5 88523 00 35 23 1.621 301.4 0.9 4.2 0.2 5 89502 00 51 42 1.672 299.7 1.4 5.1 0.4 5 90021 01 00 21 1.702 299.9 3.2 4.8 0.7 5 90708 01 11 48 1.746 297.2 2.2 5.2 0.5 5 91688 01 28 08 1.815 299.8 1.4 5.0 0.3 5 92207 01 36 47 1.855 301.0 1.1 4.7 0.3 5 92895 01 48 15 1.914 299.8 2.6 4.9 0.5 5 100059 03 47 39 3.032 300.9 1.7 1.3 0.8 5