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Improved versions of CH4 and N2O profiles derived at the Institute of Meteorology and Climate Research and Instituto de Astrofísica deAndalucía (CSIC) from spectra measured by the Michelson Interferometerfor Passive Atmospheric Sounding (MIPAS) have become available. Forthe MIPAS full-resolution period (2002–2004) these are V5H_CH4_21and V5H_N2O_21 and for the reduced-resolution period (2005–2012) these areV5R_CH4_224, V5R_CH4_225, V5R_N2O_224 and V5R_N2O_225. Here, wecompare CH4 profiles to those measured by the Fourier TransformSpectrometer on board of the Atmospheric Chemistry Experiment (ACE-FTS), theHALogen Occultation Experiment (HALOE) and the Scanning Imaging AbsorptionSpectrometer for Atmospheric CHartographY (SCIAMACHY), to the GlobalCooperative Air Sampling Network (GCASN) surface data. We find theMIPAS CH4 profiles below 25 km to be typically higher of theorder of 0.1 ppmv for both measurement periods. N2O profiles arecompared to those measured by ACE-FTS, the Microwave Limb Sounder on board ofthe Aura satellite (Aura-MLS) and the Sub-millimetre Radiometer on board ofthe Odin satellite (Odin-SMR) as well as to the Halocarbons and otherAtmospheric Trace Species Group (HATS) surface data. The mixing ratios of thesatellite instruments agree well with each other for the full-resolutionperiod. For the reduced-resolution period, MIPAS produces similarvalues as Odin-SMR, but higher values than ACE-FTS and HATS. Below 27 km,the MIPAS profiles show higher mixing ratios than Aura-MLS, and lowervalues between 27 and 41 km. Cross-comparisons between the twoMIPAS measurement periods show that they generally agree quite well,but, especially for CH4, the reduced-resolution period seems to produce slightly higher mixing ratios than the full-resolution data

Validation of revised methane and nitrous oxide profiles from MIPAS–ENVISAT