The ESA MIPAS/Envisat level2-v8 dataset: 10 years of measurements retrieved with ORM v8.22

Abstract. The observations acquired during the full mission of Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument, aboard European Space Agency Environmental Satellite (Envisat), have been analysed with version 8.22 Optimised Retrieval Model (ORM), originally developed as scientific prototype ESA level-2 processor MIPAS observations. results analyses included into 8 (level2-v8) database containing atmospheric fields pressure, temperature, and volume mixing ratio (VMR) main targets H2O, O3, HNO3, CH4, N2O, NO2, along minor gases CFC-11, ClONO2, N2O5, CFC-12, COF2, CCl4, CF4, HCFC-22, C2H2, CH3Cl, COCl2, C2H6, OCS, HDO. covers all measurements by in nominal measurement mode resolution (FR) part (from July 2002 to March 2004) observation modes optimised (OR) January 2005 April 2012). number species level2-v8 dataset makes it particular importance studies stratospheric chemistry. is considered final release products. ORM algorithm operated at vertical grid coincident tangent altitudes or a subset them, spanning (in mode) altitude range from 6 68 km FR phase 70 OR period. In latitude domain, profiles are spaced about 4.7?, while 3.7?. For each retrieved species, auxiliary data retrieval choices described. Each product characterised terms error, spatial resolution, “useful” both phases mission. These depend on characteristics (spectral measurements), (number spectral points analyses, grid), information content trace species. water vapour, ozone, nitric acid, degrees freedom significantly larger than one, mainly due finer grid. phase, some smaller error respect used reduced resolution. way handling possible caveats (negative VMR, representation) discussed. quality assessed through four criteria, two providing successful convergence iterations, one capability reproduce measurements, presence outliers. An easy identify filter problematic contained output files provided. available community portal (https://doi.org/10.5270/EN1-c8hgqx4).