Validation of ACE-FTS version 3.5 NO y species profiles using correlative satellite measurements

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