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Updated validation of ACE and OSIRIS ozone and NO<sub>2</sub> measurements in the Arctic using ground-based instruments at Eureka, Canada

  • Bognar, K.
  • Zhao, X.
  • Strong, K.
  • Boone, C. D.
  • Bourassa, A. E
  • Degenstein, D. A.
  • Drummond, J. R.
  • Duff, A.
  • Goutail, Florence
  • Griffin, D.
  • Jeffery, P. S.
  • Lutsch, E.
  • Manney, G. L.
  • Mcelroy, C. T.
  • Mclinden, C. A.
  • Millán, L. F.
  • Pazmino, Andrea
  • Sioris, C. E.
  • Walker, K. A.
  • Zou, J.
Publication Date
Jan 01, 2019
Kaleidoscope Open Archive
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This paper presents long-term intercomparisons (2003-2017) between ozone and NO<sub>2</sub> measured by the Optical Spectrograph and Infra-Red Imager System (OSIRIS) and the Atmospheric Chemistry Experiment (ACE) satellite instruments, and by ground-based instruments at the Polar Environment Atmospheric Research Laboratory (PEARL), near Eureka, Nunavut, Canada (80∘N, 86∘W). The ground-based instruments include four zenith-sky differential optical absorption spectroscopy (DOAS) instruments, two Fourier transform infrared (FTIR) spectrometers, and a Brewer spectrophotometer. Comparisons of 14-52 km ozone partial columns show good agreement between OSIRIS v5.10 and ACE-FTS v3.5/3.6 data (1.2%), while ACE-MAESTRO v3.13 ozone is smaller than the other two datasets by 6.7% and 5.9%, respectively. Satellite profiles were extended to the surface using ozonesonde data, and the resulting columns agree with the ground-based datasets with mean relative differences of 0.1-12.0%. For NO2, 12-40 km partial columns from ACE-FTS v3.5/3.6 and 12-32 km partial columns from OSIRIS v6.0 (scaled to 40 km) agree with ground-based partial columns with mean relative differences of 0.7-33.2%. Dynamical coincidence criteria improved the ACE to ground-based FTIR ozone comparisons, while little to no improvements were seen for other instruments, and for NO<sub>2</sub>. A ± 1∘ latitude criterion modestly improved the spring and fall NO<sub>2</sub> comparisons. The results of this study are consistent with previous validation exercises. In addition, there are no significant drifts between the satellite datasets, or between the satellites and the ground-based measurements, indicating that the OSIRIS and ACE instruments continue to perform well

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