These data are made available to the scientific community and public with the understanding that authors of publications and presentations will contact the PI to obtain up-to-date information on the latest version of the data during the early stages of their analysis. Manuscripts that employ these data should be reviewed by the PI before submission to ensure the quality and limitations of the data are represented. Data Disclaimer: Data has undergone extensive quality checks and is available from NOAA-GMD and WDCGG. However, there still exists the potential for these data to be modified at the discretion of NOAA/ESRL Global Monitoring Division. If you have questions regarding the data in this file, please contact: Audra McClure-Begley: Audra.mcclure@noaa.gov (303-497-6823) Please use the following citation for data use: McClure-Begley, A., Petropavlovskikh, I., Oltmans, S., (2014) NOAA Global Monitoring Surface Ozone Network. Station name, Time start-Time end. National Oceanic and Atmospheric Administration, Earth Systems Research Laboratory Global Monitoring Division. Boulder, CO. DATE ACCESSED http://dx.doi.org/10.7289/V57P8WBF STN YEAR MON DAY HR O3(PPB) THD 2017 05 01 00 38.70 THD 2017 05 01 01 39.01 THD 2017 05 01 02 37.96 THD 2017 05 01 03 37.59 THD 2017 05 01 04 37.10 THD 2017 05 01 05 36.64 THD 2017 05 01 06 36.37 THD 2017 05 01 07 35.79 THD 2017 05 01 08 33.90 THD 2017 05 01 09 27.22 THD 2017 05 01 10 26.70 THD 2017 05 01 11 22.57 THD 2017 05 01 12 22.41 THD 2017 05 01 13 17.34 THD 2017 05 01 14 21.21 THD 2017 05 01 15 23.54 THD 2017 05 01 16 24.89 THD 2017 05 01 17 25.95 THD 2017 05 01 18 28.73 THD 2017 05 01 19 28.92 THD 2017 05 01 20 27.26 THD 2017 05 01 21 28.49 THD 2017 05 01 22 30.65 THD 2017 05 01 23 38.28 THD 2017 05 02 00 43.49 THD 2017 05 02 01 42.76 THD 2017 05 02 02 40.77 THD 2017 05 02 03 35.81 THD 2017 05 02 04 32.12 THD 2017 05 02 05 29.88 THD 2017 05 02 06 27.93 THD 2017 05 02 07 23.27 THD 2017 05 02 08 26.30 THD 2017 05 02 09 25.31 THD 2017 05 02 10 22.26 THD 2017 05 02 11 22.09 THD 2017 05 02 12 20.12 THD 2017 05 02 13 19.15 THD 2017 05 02 14 17.14 THD 2017 05 02 15 17.24 THD 2017 05 02 16 19.81 THD 2017 05 02 17 19.07 THD 2017 05 02 18 18.77 THD 2017 05 02 19 18.67 THD 2017 05 02 20 19.33 THD 2017 05 02 21 19.49 THD 2017 05 02 22 19.32 THD 2017 05 02 23 18.93 THD 2017 05 03 00 18.83 THD 2017 05 03 01 18.26 THD 2017 05 03 02 18.21 THD 2017 05 03 03 18.51 THD 2017 05 03 04 18.36 THD 2017 05 03 05 18.70 THD 2017 05 03 06 17.06 THD 2017 05 03 07 15.80 THD 2017 05 03 08 15.68 THD 2017 05 03 09 11.20 THD 2017 05 03 10 8.88 THD 2017 05 03 11 8.17 THD 2017 05 03 12 8.77 THD 2017 05 03 13 5.64 THD 2017 05 03 14 3.10 THD 2017 05 03 15 7.71 THD 2017 05 03 16 8.38 THD 2017 05 03 17 7.54 THD 2017 05 03 18 11.04 THD 2017 05 03 19 14.21 THD 2017 05 03 20 12.73 THD 2017 05 03 21 11.78 THD 2017 05 03 22 14.54 THD 2017 05 03 23 16.03 THD 2017 05 04 00 16.60 THD 2017 05 04 01 16.33 THD 2017 05 04 02 15.68 THD 2017 05 04 03 13.69 THD 2017 05 04 04 12.47 THD 2017 05 04 05 14.45 THD 2017 05 04 06 14.14 THD 2017 05 04 07 12.74 THD 2017 05 04 08 12.43 THD 2017 05 04 09 10.10 THD 2017 05 04 10 12.18 THD 2017 05 04 11 6.64 THD 2017 05 04 12 4.60 THD 2017 05 04 13 5.74 THD 2017 05 04 14 4.45 THD 2017 05 04 15 14.24 THD 2017 05 04 16 15.05 THD 2017 05 04 17 16.68 THD 2017 05 04 18 17.70 THD 2017 05 04 19 17.81 THD 2017 05 04 20 18.55 THD 2017 05 04 21 18.96 THD 2017 05 04 22 16.11 THD 2017 05 04 23 15.54 THD 2017 05 05 00 15.67 THD 2017 05 05 01 15.57 THD 2017 05 05 02 19.49 THD 2017 05 05 03 20.05 THD 2017 05 05 04 19.34 THD 2017 05 05 05 15.12 THD 2017 05 05 06 16.30 THD 2017 05 05 07 17.34 THD 2017 05 05 08 15.54 THD 2017 05 05 09 16.30 THD 2017 05 05 10 14.63 THD 2017 05 05 11 11.44 THD 2017 05 05 12 10.82 THD 2017 05 05 13 11.07 THD 2017 05 05 14 36.02 THD 2017 05 05 15 44.10 THD 2017 05 05 16 45.22 THD 2017 05 05 17 44.88 THD 2017 05 05 18 43.93 THD 2017 05 05 19 42.19 THD 2017 05 05 20 43.62 THD 2017 05 05 21 43.94 THD 2017 05 05 22 44.01 THD 2017 05 05 23 43.32 THD 2017 05 06 00 42.26 THD 2017 05 06 01 41.32 THD 2017 05 06 02 40.57 THD 2017 05 06 03 40.32 THD 2017 05 06 04 40.31 THD 2017 05 06 05 40.18 THD 2017 05 06 06 40.17 THD 2017 05 06 07 39.67 THD 2017 05 06 08 38.09 THD 2017 05 06 09 38.47 THD 2017 05 06 10 38.40 THD 2017 05 06 11 37.89 THD 2017 05 06 12 37.84 THD 2017 05 06 13 38.69 THD 2017 05 06 14 38.22 THD 2017 05 06 15 39.22 THD 2017 05 06 16 39.29 THD 2017 05 06 17 39.87 THD 2017 05 06 18 40.55 THD 2017 05 06 19 40.14 THD 2017 05 06 20 39.64 THD 2017 05 06 21 39.57 THD 2017 05 06 22 40.16 THD 2017 05 06 23 39.95 THD 2017 05 07 00 39.57 THD 2017 05 07 01 38.53 THD 2017 05 07 02 37.72 THD 2017 05 07 03 37.78 THD 2017 05 07 04 37.54 THD 2017 05 07 05 37.59 THD 2017 05 07 06 37.11 THD 2017 05 07 07 35.48 THD 2017 05 07 08 34.82 THD 2017 05 07 09 34.76 THD 2017 05 07 10 34.54 THD 2017 05 07 11 34.17 THD 2017 05 07 12 33.45 THD 2017 05 07 13 32.64 THD 2017 05 07 14 31.95 THD 2017 05 07 15 32.27 THD 2017 05 07 16 32.12 THD 2017 05 07 17 31.75 THD 2017 05 07 18 31.29 THD 2017 05 07 19 31.33 THD 2017 05 07 20 31.45 THD 2017 05 07 21 32.57 THD 2017 05 07 22 33.42 THD 2017 05 07 23 33.69 THD 2017 05 08 00 34.16 THD 2017 05 08 01 34.52 THD 2017 05 08 02 34.29 THD 2017 05 08 03 33.12 THD 2017 05 08 04 32.29 THD 2017 05 08 05 26.39 THD 2017 05 08 06 22.41 THD 2017 05 08 07 23.69 THD 2017 05 08 08 26.25 THD 2017 05 08 09 25.48 THD 2017 05 08 10 23.26 THD 2017 05 08 11 25.23 THD 2017 05 08 12 21.41 THD 2017 05 08 13 22.77 THD 2017 05 08 14 20.93 THD 2017 05 08 15 14.24 THD 2017 05 08 16 15.19 THD 2017 05 08 17 18.42 THD 2017 05 08 18 19.53 THD 2017 05 08 19 21.35 THD 2017 05 08 20 29.48 THD 2017 05 08 21 31.49 THD 2017 05 08 22 33.37 THD 2017 05 08 23 35.77 THD 2017 05 09 00 37.09 THD 2017 05 09 01 35.81 THD 2017 05 09 02 34.31 THD 2017 05 09 03 33.80 THD 2017 05 09 04 32.38 THD 2017 05 09 05 31.76 THD 2017 05 09 06 30.51 THD 2017 05 09 07 27.13 THD 2017 05 09 08 23.93 THD 2017 05 09 09 26.40 THD 2017 05 09 10 25.25 THD 2017 05 09 11 26.29 THD 2017 05 09 12 26.78 THD 2017 05 09 13 24.05 THD 2017 05 09 14 22.86 THD 2017 05 09 15 22.98 THD 2017 05 09 16 24.04 THD 2017 05 09 17 26.58 THD 2017 05 09 18 29.00 THD 2017 05 09 19 29.71 THD 2017 05 09 20 31.32 THD 2017 05 09 21 31.33 THD 2017 05 09 22 32.64 THD 2017 05 09 23 34.45 THD 2017 05 10 00 36.29 THD 2017 05 10 01 37.78 THD 2017 05 10 02 38.00 THD 2017 05 10 03 36.81 THD 2017 05 10 04 35.93 THD 2017 05 10 05 35.87 THD 2017 05 10 06 35.92 THD 2017 05 10 07 36.39 THD 2017 05 10 08 37.02 THD 2017 05 10 09 34.44 THD 2017 05 10 10 34.89 THD 2017 05 10 11 36.71 THD 2017 05 10 12 36.45 THD 2017 05 10 13 33.77 THD 2017 05 10 14 33.64 THD 2017 05 10 15 36.60 THD 2017 05 10 16 35.89 THD 2017 05 10 17 35.47 THD 2017 05 10 18 35.18 THD 2017 05 10 19 35.96 THD 2017 05 10 20 36.59 THD 2017 05 10 21 36.58 THD 2017 05 10 22 36.85 THD 2017 05 10 23 34.28 THD 2017 05 11 00 33.76 THD 2017 05 11 01 35.19 THD 2017 05 11 02 36.89 THD 2017 05 11 03 36.04 THD 2017 05 11 04 33.04 THD 2017 05 11 05 29.16 THD 2017 05 11 06 27.12 THD 2017 05 11 07 26.01 THD 2017 05 11 08 25.23 THD 2017 05 11 09 26.10 THD 2017 05 11 10 24.56 THD 2017 05 11 11 23.75 THD 2017 05 11 12 25.19 THD 2017 05 11 13 23.80 THD 2017 05 11 14 23.73 THD 2017 05 11 15 26.90 THD 2017 05 11 16 28.72 THD 2017 05 11 17 32.85 THD 2017 05 11 18 36.68 THD 2017 05 11 19 37.23 THD 2017 05 11 20 37.92 THD 2017 05 11 21 38.35 THD 2017 05 11 22 37.69 THD 2017 05 11 23 38.56 THD 2017 05 12 00 38.70 THD 2017 05 12 01 39.34 THD 2017 05 12 02 39.17 THD 2017 05 12 03 38.78 THD 2017 05 12 04 37.29 THD 2017 05 12 05 36.46 THD 2017 05 12 06 34.92 THD 2017 05 12 07 35.12 THD 2017 05 12 08 33.32 THD 2017 05 12 09 29.35 THD 2017 05 12 10 26.02 THD 2017 05 12 11 24.21 THD 2017 05 12 12 26.57 THD 2017 05 12 13 32.76 THD 2017 05 12 14 25.79 THD 2017 05 12 15 28.04 THD 2017 05 12 16 29.21 THD 2017 05 12 17 32.07 THD 2017 05 12 18 34.63 THD 2017 05 12 19 37.17 THD 2017 05 12 20 37.55 THD 2017 05 12 21 37.89 THD 2017 05 12 22 38.56 THD 2017 05 12 23 38.42 THD 2017 05 13 00 37.93 THD 2017 05 13 01 37.34 THD 2017 05 13 02 37.16 THD 2017 05 13 03 39.67 THD 2017 05 13 04 40.11 THD 2017 05 13 05 37.06 THD 2017 05 13 06 25.11 THD 2017 05 13 07 23.74 THD 2017 05 13 08 21.47 THD 2017 05 13 09 26.92 THD 2017 05 13 10 26.99 THD 2017 05 13 11 27.67 THD 2017 05 13 12 26.94 THD 2017 05 13 13 26.54 THD 2017 05 13 14 26.53 THD 2017 05 13 15 24.53 THD 2017 05 13 16 27.29 THD 2017 05 13 17 32.08 THD 2017 05 13 18 31.14 THD 2017 05 13 19 34.96 THD 2017 05 13 20 36.86 THD 2017 05 13 21 37.07 THD 2017 05 13 22 37.30 THD 2017 05 13 23 37.71 THD 2017 05 14 00 37.67 THD 2017 05 14 01 37.23 THD 2017 05 14 02 37.24 THD 2017 05 14 03 34.36 THD 2017 05 14 04 31.61 THD 2017 05 14 05 31.12 THD 2017 05 14 06 31.69 THD 2017 05 14 07 31.08 THD 2017 05 14 08 31.43 THD 2017 05 14 09 30.55 THD 2017 05 14 10 29.24 THD 2017 05 14 11 27.50 THD 2017 05 14 12 26.39 THD 2017 05 14 13 23.55 THD 2017 05 14 14 18.17 THD 2017 05 14 15 21.70 THD 2017 05 14 16 24.23 THD 2017 05 14 17 22.72 THD 2017 05 14 18 28.04 THD 2017 05 14 19 33.51 THD 2017 05 14 20 37.24 THD 2017 05 14 21 37.50 THD 2017 05 14 22 37.27 THD 2017 05 14 23 36.91 THD 2017 05 15 00 37.28 THD 2017 05 15 01 36.51 THD 2017 05 15 02 35.66 THD 2017 05 15 03 35.25 THD 2017 05 15 04 35.88 THD 2017 05 15 05 36.27 THD 2017 05 15 06 36.62 THD 2017 05 15 07 36.55 THD 2017 05 15 08 34.73 THD 2017 05 15 09 33.14 THD 2017 05 15 10 29.55 THD 2017 05 15 11 28.01 THD 2017 05 15 12 28.45 THD 2017 05 15 13 26.89 THD 2017 05 15 14 24.27 THD 2017 05 15 15 22.18 THD 2017 05 15 16 22.25 THD 2017 05 15 17 26.78 THD 2017 05 15 18 24.46 THD 2017 05 15 19 32.77 THD 2017 05 15 20 34.27 THD 2017 05 15 21 35.88 THD 2017 05 15 22 36.93 THD 2017 05 15 23 39.51 THD 2017 05 16 00 39.89 THD 2017 05 16 01 39.95 THD 2017 05 16 02 40.95 THD 2017 05 16 03 40.46 THD 2017 05 16 04 37.19 THD 2017 05 16 05 36.57 THD 2017 05 16 06 38.85 THD 2017 05 16 07 36.01 THD 2017 05 16 08 20.92 THD 2017 05 16 09 18.25 THD 2017 05 16 10 20.81 THD 2017 05 16 11 17.58 THD 2017 05 16 12 15.94 THD 2017 05 16 13 15.27 THD 2017 05 16 14 21.59 THD 2017 05 16 15 19.33 THD 2017 05 16 16 19.69 THD 2017 05 16 17 25.15 THD 2017 05 16 18 29.16 THD 2017 05 16 19 30.79 THD 2017 05 16 20 30.36 THD 2017 05 16 21 29.57 THD 2017 05 16 22 29.24 THD 2017 05 16 23 29.15 THD 2017 05 17 00 28.85 THD 2017 05 17 01 27.68 THD 2017 05 17 02 28.41 THD 2017 05 17 03 27.71 THD 2017 05 17 04 27.85 THD 2017 05 17 05 30.60 THD 2017 05 17 06 30.55 THD 2017 05 17 07 30.67 THD 2017 05 17 08 30.51 THD 2017 05 17 09 31.62 THD 2017 05 17 10 32.14 THD 2017 05 17 11 31.88 THD 2017 05 17 12 31.05 THD 2017 05 17 13 29.09 THD 2017 05 17 14 23.81 THD 2017 05 17 15 23.72 THD 2017 05 17 16 24.14 THD 2017 05 17 17 21.53 THD 2017 05 17 18 26.47 THD 2017 05 17 19 27.11 THD 2017 05 17 20 27.85 THD 2017 05 17 21 30.58 THD 2017 05 17 22 31.27 THD 2017 05 17 23 35.03 THD 2017 05 18 00 34.90 THD 2017 05 18 01 36.92 THD 2017 05 18 02 39.30 THD 2017 05 18 03 35.08 THD 2017 05 18 04 31.93 THD 2017 05 18 05 30.29 THD 2017 05 18 06 30.13 THD 2017 05 18 07 30.21 THD 2017 05 18 08 30.29 THD 2017 05 18 09 28.16 THD 2017 05 18 10 28.47 THD 2017 05 18 11 20.70 THD 2017 05 18 12 20.40 THD 2017 05 18 13 15.59 THD 2017 05 18 14 17.30 THD 2017 05 18 15 16.21 THD 2017 05 18 16 18.73 THD 2017 05 18 17 19.70 THD 2017 05 18 18 19.07 THD 2017 05 18 19 18.09 THD 2017 05 18 20 21.67 THD 2017 05 18 21 23.35 THD 2017 05 18 22 26.45 THD 2017 05 18 23 29.50 THD 2017 05 19 00 30.58 THD 2017 05 19 01 31.09 THD 2017 05 19 02 31.51 THD 2017 05 19 03 31.48 THD 2017 05 19 04 30.11 THD 2017 05 19 05 29.75 THD 2017 05 19 06 29.04 THD 2017 05 19 07 26.85 THD 2017 05 19 08 29.24 THD 2017 05 19 09 27.85 THD 2017 05 19 10 29.81 THD 2017 05 19 11 29.29 THD 2017 05 19 12 28.68 THD 2017 05 19 13 28.26 THD 2017 05 19 14 27.09 THD 2017 05 19 15 25.03 THD 2017 05 19 16 28.58 THD 2017 05 19 17 31.07 THD 2017 05 19 18 30.88 THD 2017 05 19 19 27.75 THD 2017 05 19 20 27.66 THD 2017 05 19 21 29.04 THD 2017 05 19 22 28.32 THD 2017 05 19 23 26.97 THD 2017 05 20 00 26.94 THD 2017 05 20 01 26.92 THD 2017 05 20 02 26.43 THD 2017 05 20 03 25.11 THD 2017 05 20 04 22.49 THD 2017 05 20 05 21.34 THD 2017 05 20 06 21.28 THD 2017 05 20 07 23.13 THD 2017 05 20 08 22.65 THD 2017 05 20 09 21.35 THD 2017 05 20 10 17.79 THD 2017 05 20 11 18.23 THD 2017 05 20 12 12.56 THD 2017 05 20 13 13.52 THD 2017 05 20 14 12.61 THD 2017 05 20 15 14.43 THD 2017 05 20 16 15.52 THD 2017 05 20 17 19.71 THD 2017 05 20 18 19.67 THD 2017 05 20 19 18.15 THD 2017 05 20 20 9999.99