MIPAS-STR measurements in the Arctic UTLS in winter/spring 2010: instrument characterization, retrieval and validation

摘要: Abstract. The mid-infrared FTIR-limb-sounder Michelson Interferometer for Passive Atmospheric Sounding–STRatospheric aircraft (MIPAS-STR) was deployed onboard the research M55 Geophysica during RECONCILE campaign (Reconciliation of Essential Process Parameters an Enhanced Predictability Arctic Stratospheric Ozone Loss and its Climate Interactions) in winter/spring 2010. From MIPAS-STR measurements, vertical profiles 2-dimensional cross-sections temperature trace gases are retrieved. Detailed mesoscale structures polar vortex air, extra air filaments identified results at typical resolutions 1 to 2 km horizontal sampling densities 45 or 25 km, depending on programme. Results shown flight 11 March 2010 validated with collocated in-situ measurements temperature, O3, CFC-11, CFC-12 H2O. Exceptional agreement is found comparisons mean differences (vertical profile/along track) 0.2/−0.2 K −0.01/0.05 ppmv O3 corresponding sample standard deviations 0.7/0.6 0.1/0.3 ppmv. comparison retrieved HNO3 from infrared limb-sounder Cryogenic Infrared Spectrometers Telescopes Atmosphere–New Frontiers (CRISTA–NF) indicates a high degree agreement. We discuss current configuration, spectral radiometric calibration retrieval atmospheric parameters spectra. significantly affected by continuum-like contributions, which attributed background aerosol broad signatures interfering gases, important limb-sounding Upper Troposphere/Lower Stratosphere (UTLS) region. Taking into consideration effects, we present scheme suitable accurate retrievals extended set including correction systematic line-of-sight offset.