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. Zawodny19Patrick E. Sheese et al. 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
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
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
Correspondence: Kaley A. Walker (kaley.walker@utoronto.ca)
Received: 06 Mar 2016 – Discussion started: 17 May 2016 – Revised: 25 Sep 2016 – Accepted: 06 Oct 2016 – Published: 05 Dec 2016
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.
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.
This study validates version 3.5 of the ACE-FTS NOy species data sets by comparing diurnally...
