Validation of ACE and OSIRIS ozone and NO 2 measurements using ground-based instruments at 80° N

摘要: Abstract. The Optical Spectrograph and Infra-Red Imager System (OSIRIS) the Atmospheric Chemistry Experiment (ACE) have been taking measurements from space since 2001 2003, respectively. This paper presents intercomparisons between ozone NO2 measured by ACE OSIRIS satellite instruments ground-based at Polar Environment Research Laboratory (PEARL), which is located Eureka, Canada (80° N, 86° W) operated Canadian Network for Detection of Change (CANDAC). included in this study are four zenith-sky differential optical absorption spectroscopy (DOAS) instruments, one Bruker Fourier transform infrared spectrometer (FTIR) Brewer spectrophotometers. Ozone total columns DOAS were retrieved using new Composition (NDACC) guidelines agree to within 3.2%. with spectrophotometers mean relative differences that smaller than 1.5%. suggests these NDACC data successful producing a homogenous accurate dataset 80° N. Satellite 14–52 km 17–40 partial 500 PEARL calculated ACE-FTS Version 2.2 (v2.2) plus updates, v3.0, ACE-MAESTRO (Measurements Aerosol Extinction Stratosphere Troposphere Retrieved Occultation) v1.2 SaskMART v5.0x Optimal Estimation v3.0 products. validated v2.2 nearly identical, 0.0 ± 0.2% −0.2 0.1% minus NO2, constructed 0–14 ozonesonde compared column measurements. satellite-plus-sonde 0.1–7.3%. For 17 upward scaled noon photochemical model. Mean OSIRIS, do not exceed 20%. measures more other 25–52%. Seasonal variation observed, suggesting there systematic errors and/or model corrections. spring-time measurements, additional coincidence criteria based on stratospheric temperature location polar vortex found improve agreement some instruments. FTIR, 2007–2009 difference improved −5.0 0.4% −3.1 0.8% dynamical selection criteria. was largest improvement, likely because both measure direct sunlight therefore well-characterized lines-of-sight scattered addition ±1° latitude criterion intercomparison results, due sharp latitudinal gradient during sunrise. show any obvious trends over missions, indicating continue perform well.