e data are made available to the scientific community and public with the un derstanding that authors of publications and presentations will contact the PI t o obtain up-to-date information on the latest version of the data during the early stages of their analysis. Manuscripts that employ these data sh ould be reviewed by the PI before submission to enure the quality and limitation of the data are represented. Data Acknolowedegment: The Lauder surface ozone monitoring is a collaboration be tween NOAA-GML and NIWA (New Zealand's National Institude of Water & Atmospheric Research). Data collection is made possible thanks to efforts of Dan Smale (dan.smale@niwa.co.nz) and Dr. Richard Querel (Richard.Querel@niwa.co. nz) Data Disclaimer: Data has undergone extensive quality checks and is available fr om NOAA-GML and WDCGG. However, there still exists the potential for these data STN YEAR MON DAY HR O3(PPB) LAU 2009 05 01 00 25.30 LAU 2009 05 01 01 24.74 LAU 2009 05 01 02 24.22 LAU 2009 05 01 03 23.85 LAU 2009 05 01 04 23.39 LAU 2009 05 01 05 19.55 LAU 2009 05 01 06 16.87 LAU 2009 05 01 07 19.35 LAU 2009 05 01 08 15.91 LAU 2009 05 01 09 11.23 LAU 2009 05 01 10 10.29 LAU 2009 05 01 11 9.40 LAU 2009 05 01 12 8.32 LAU 2009 05 01 13 8.61 LAU 2009 05 01 14 9.08 LAU 2009 05 01 15 9.89 LAU 2009 05 01 16 8.17 LAU 2009 05 01 17 9.42 LAU 2009 05 01 18 8.24 LAU 2009 05 01 19 8.01 LAU 2009 05 01 20 6.24 LAU 2009 05 01 21 10.25 LAU 2009 05 01 22 13.58 LAU 2009 05 01 23 16.86 LAU 2009 05 02 00 18.81 LAU 2009 05 02 01 20.42 LAU 2009 05 02 02 21.51 LAU 2009 05 02 03 20.85 LAU 2009 05 02 04 18.84 LAU 2009 05 02 05 16.32 LAU 2009 05 02 06 16.53 LAU 2009 05 02 07 9.41 LAU 2009 05 02 08 7.03 LAU 2009 05 02 09 6.69 LAU 2009 05 02 10 8.68 LAU 2009 05 02 11 6.93 LAU 2009 05 02 12 8.56 LAU 2009 05 02 13 9.16 LAU 2009 05 02 14 7.97 LAU 2009 05 02 15 8.06 LAU 2009 05 02 16 7.72 LAU 2009 05 02 17 6.50 LAU 2009 05 02 18 5.96 LAU 2009 05 02 19 6.88 LAU 2009 05 02 20 7.41 LAU 2009 05 02 21 8.43 LAU 2009 05 02 22 10.01 LAU 2009 05 02 23 13.66 LAU 2009 05 03 00 16.17 LAU 2009 05 03 01 18.98 LAU 2009 05 03 02 19.55 LAU 2009 05 03 03 19.64 LAU 2009 05 03 04 18.92 LAU 2009 05 03 05 16.87 LAU 2009 05 03 06 16.48 LAU 2009 05 03 07 8.80 LAU 2009 05 03 08 7.20 LAU 2009 05 03 09 8.70 LAU 2009 05 03 10 6.91 LAU 2009 05 03 11 8.37 LAU 2009 05 03 12 7.51 LAU 2009 05 03 13 8.26 LAU 2009 05 03 14 8.05 LAU 2009 05 03 15 8.04 LAU 2009 05 03 16 7.51 LAU 2009 05 03 17 7.51 LAU 2009 05 03 18 6.76 LAU 2009 05 03 19 6.28 LAU 2009 05 03 20 6.80 LAU 2009 05 30 05 18.20 LAU 2009 05 30 06 16.28 LAU 2009 05 30 07 14.72 LAU 2009 05 30 08 16.68 LAU 2009 05 30 09 18.75 LAU 2009 05 30 10 23.77 LAU 2009 05 30 11 24.63 LAU 2009 05 30 12 27.14 LAU 2009 05 30 13 27.76 LAU 2009 05 30 14 27.17 LAU 2009 05 30 15 25.95 LAU 2009 05 30 16 27.20 LAU 2009 05 30 17 26.97 LAU 2009 05 30 18 25.10 LAU 2009 05 30 19 24.93 LAU 2009 05 30 20 25.78 LAU 2009 05 30 21 25.44 LAU 2009 05 30 22 27.12 LAU 2009 05 30 23 27.25 LAU 2009 05 31 00 28.18 LAU 2009 05 31 01 27.91 LAU 2009 05 31 02 27.11 LAU 2009 05 31 03 25.56 LAU 2009 05 31 04 24.08 LAU 2009 05 31 05 25.83 LAU 2009 05 31 06 20.49 LAU 2009 05 31 07 20.35 LAU 2009 05 31 08 20.09 LAU 2009 05 31 09 17.59 LAU 2009 05 31 10 16.54 LAU 2009 05 31 11 15.86 LAU 2009 05 31 12 17.90 LAU 2009 05 31 13 19.14 LAU 2009 05 31 14 16.73 LAU 2009 05 31 15 19.63 LAU 2009 05 31 16 13.67 LAU 2009 05 31 17 14.22 LAU 2009 05 31 18 14.81 LAU 2009 05 31 19 13.93 LAU 2009 05 31 20 11.51 LAU 2009 05 31 21 11.60 LAU 2009 05 31 22 12.62 LAU 2009 05 31 23 16.91