Articles | Volume 9, issue 12
Atmos. Meas. Tech., 9, 5781–5810, 2016
Atmos. Meas. Tech., 9, 5781–5810, 2016

Research article 05 Dec 2016

Research article | 05 Dec 2016

Validation of ACE-FTS version 3.5 NOy species profiles using correlative satellite measurements

Patrick E. Sheese1, Kaley A. Walker1,2, Chris D. Boone2, Chris A. McLinden3, Peter F. Bernath4, Adam E. Bourassa5, John P. Burrows6, Doug A. Degenstein5, Bernd Funke7, Didier Fussen8, Gloria L. Manney9,10, C. Thomas McElroy11, Donal Murtagh12, Cora E. Randall13, Piera Raspollini14, Alexei Rozanov6, James M. Russell III15, Makoto Suzuki16, Masato Shiotani17, Joachim Urban12,†, Thomas von Clarmann18, and Joseph M. Zawodny19 Patrick E. Sheese et al.
  • 1University of Toronto, Department of Physics, Toronto, Canada
  • 2University of Waterloo, Department of Chemistry, Waterloo, Canada
  • 3Environment Canada, Air Quality Research Branch, Toronto, Canada
  • 4Old Dominion University, Department of Chemistry and Biochemistry, Norfolk, USA
  • 5University of Saskatchewan, ISAS, Department of Physics and Engineering, Saskatoon, Canada
  • 6University of Bremen, Institute of Environmental Physics, Bremen, Germany
  • 7Instituto de Astrofísica de Andalucía, CSIC, Granada, Spain
  • 8Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Brussels, Belgium
  • 9NorthWest Research Associates, Inc., Socorro, NM, USA
  • 10New Mexico Institute of Mining and Technology, Socorro, NM, USA
  • 11Department of Earth and Space Science and Engineering, York University, Toronto, Canada
  • 12Chalmers University of Technology, Department of Earth and Space Sciences, Göteborg, Sweden
  • 13University of Colorado, Laboratory for Atmospheric and Space Physics, Boulder, USA
  • 14Consiglio Nazionale delle Ricerche, Istituto di Fisica Applicata “Nello Carrara”, Firenze, Italy
  • 15Hampton University, Center for Atmospheric Sciences, Hampton, USA
  • 16Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Kanagawa, Japan
  • 17Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
  • 18Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
  • 19NASA Langley Research Center, Hampton, USA
  • deceased, 14 August 2014

Abstract. The ACE-FTS (Atmospheric Chemistry Experiment – Fourier Transform Spectrometer) instrument on the Canadian SCISAT satellite, which has been in operation for over 12 years, has the capability of deriving stratospheric profiles of many of the NOy (N + NO + NO2+ NO3+ 2  ×  N2O5+ HNO3+ HNO4+ ClONO2+ BrONO2) species. Version 2.2 of ACE-FTS NO, NO2, HNO3, N2O5, and ClONO2 has previously been validated, and this study compares the most recent version (v3.5) of these five ACE-FTS products to spatially and temporally coincident measurements from other satellite instruments – GOMOS, HALOE, MAESTRO, MIPAS, MLS, OSIRIS, POAM III, SAGE III, SCIAMACHY, SMILES, and SMR. For each ACE-FTS measurement, a photochemical box model was used to simulate the diurnal variations of the NOy species and the ACE-FTS measurements were scaled to the local times of the coincident measurements. The comparisons for all five species show good agreement with correlative satellite measurements. For NO in the altitude range of 25–50 km, ACE-FTS typically agrees with correlative data to within −10 %. Instrument-averaged mean relative differences are approximately −10 % at 30–40 km for NO2, within ±7 % at 8–30 km for HNO3, better than −7 % at 21–34 km for local morning N2O5, and better than −8 % at 21–34 km for ClONO2. Where possible, the variations in the mean differences due to changes in the comparison local time and latitude are also discussed.

Short summary
This study validates version 3.5 of the ACE-FTS NOy species data sets by comparing diurnally scaled ACE-FTS data to correlative data from 11 other satellite limb sounders. For all five species examined (NO, NO2, HNO3, N2O5, and ClONO2), there is good agreement between ACE-FTS and the other data sets in various regions of the atmosphere. In these validated regions, these NOy data products can be used for further investigation into the composition, dynamics, and climate of the stratosphere.