Updated validation of ACE and OSIRIS ozone and NO₂ measurements in the Arctic using ground-based instruments at Eureka, Canada

K. Bognar (1) , X. Zhao (2) , K. Strong (1) , C. D. Boone (3) , A. E Bourassa (4) , D. A. Degenstein (4) , J. R. Drummond (5) , A. Duff (6) , Florence Goutail (7) , D. Griffin (1, 2) , P. S. Jeffery (1) , E. Lutsch (1) , G. L. Manney (8, 9) , C. T. Mcelroy (10) , C. A. Mclinden (2) , L. F. Millán (11) , Andrea Pazmino (7) , C. E. Sioris (2) , K. A. Walker (1) , J. Zou (1)

1 Department of Physics [Toronto]
2 ECCC - Environment and Climate Change Canada
3 Department of Chemistry [Waterloo]
4 ISAS - Institute of Space and Atmospheric Studies [Saskatoon]
5 Department of Physics and Atmospheric Science [Halifax]
6 Department of Physics [Kingston]
7 STRATO - LATMOS
8 NWRA - NorthWest Research Associates
9 Department of Physics [Socorro]
10 ESSE - Department of Earth and Space Science and Engineering [York University - Toronto]
11 JPL - Jet Propulsion Laboratory

This paper presents long-term intercomparisons (2003-2017) between ozone and NO₂ 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 NO₂. A  ± 1∘ latitude criterion modestly improved the spring and fall NO₂ 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

Mots clés: OSIRIS; Ozone; NO2; Arctic; ACE

Domaines: Physique Atmosphérique et Océanique [physics.ao-ph]; Océan, Atmosphère

K. Bognar, X. Zhao, K. Strong, C. D. Boone, A. E Bourassa, et al.. Updated validation of ACE and OSIRIS ozone and NO₂ measurements in the Arctic using ground-based instruments at Eureka, Canada. Journal of Quantitative Spectroscopy and Radiative Transfer, 2019, 238 (November), pp.art. 106571. ⟨10.1016/j.jqsrt.2019.07.014⟩. ⟨insu-02182891⟩