On the quality of MIPAS kinetic temperature in the middle atmosphere

摘要: Abstract. The kinetic temperature and line of sight elevation information are retrieved from the MIPAS Middle Atmosphere (MA), Upper (UA) NoctiLucent-Cloud (NLC) modes high spectral resolution limb observations CO2 15 μm emission using dedicated IMK/IAA retrieval algorithm, which considers non-local thermodynamic equilibrium conditions. These variables accurately derived about 20 km (MA) 40 (UA NLC) to 105 globally both at daytime nighttime. Typical random errors smaller than 0.5 K below 50 km, 0.5–2 50–70 2–7 above. systematic error is typically 1 70 1–3 85 3–11 100 km. average vertical 4 35 3 35–50 4–6 50–90 6–10 We compared our retrievals 2005 2009 with co-located ground-based measurements lidars located Table Mountain Facility Mauna Loa Observatory, SATI spectrograph in Granada (Spain) Davis station spectrometer, satellite ACE-FTS, Aura-MLS TIMED-SABER also temperatures latitudes climatology falling sphere measurements. comparisons show very good agreement, differences 85–90 mid-latitudes. Differences over poles this altitude range larger but can be generally explained terms known biases other instruments. above 90 worsen always instrument