TY - JOUR
T1 - A blind test retrieval experiment for infrared limb emission spectrometry
AU - von Clarmann, T.
AU - Ceccherini, S.
AU - Doicu, A.
AU - Dudhia, A.
AU - Funke, B.
AU - Grabowski, U.
AU - Hilgers, S.
AU - Jay, V.
AU - Linden, A.
AU - López-Puertas, M.
AU - MartíN-Torres, F. -J.
AU - Payne, V.
AU - Reburn, J.
AU - Ridolfi, M.
AU - Schreier, F.
AU - Schwarz, G.
AU - Siddans, R.
AU - Steck, T.
PY - 2003/12/1
Y1 - 2003/12/1
N2 - The functionality and characteristics of six different data processors (i.e., retrieval codes in their actual software and hardware environment) for analysis of high-resolution limb emission infrared spectra recorded by the space-borne Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) have been validated by means of a blind test retrieval experiment based on synthetic spectra. For this purpose a self-consistent set of atmospheric state parameters, including pressure, temperature, vibrational temperatures, and abundances of trace gases and aerosols, has been generated and used as input for radiative transfer calculations for MIPAS measurement geometry and configuration. These spectra were convolved with the MIPAS field of view, spectrally degraded by the MIPAS instrument line shape, and, finally, superimposed with synthetic measurement noise. These synthetic MIPAS measurements were distributed among the participants of the project "Advanced MIPAS level-2 data analysis" (AMIL2DA), who performed temperature and species abundance profile retrievals by inverse radiative transfer calculations. While the retrieved profiles of atmospheric state parameters reflect some characteristics of the individual data processors, it was shown that all the data processors under investigation are capable of producing reliable results in the sense that deviations of retrieved results from the reference profiles are within the margin that is consistent with analytical error estimation.
AB - The functionality and characteristics of six different data processors (i.e., retrieval codes in their actual software and hardware environment) for analysis of high-resolution limb emission infrared spectra recorded by the space-borne Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) have been validated by means of a blind test retrieval experiment based on synthetic spectra. For this purpose a self-consistent set of atmospheric state parameters, including pressure, temperature, vibrational temperatures, and abundances of trace gases and aerosols, has been generated and used as input for radiative transfer calculations for MIPAS measurement geometry and configuration. These spectra were convolved with the MIPAS field of view, spectrally degraded by the MIPAS instrument line shape, and, finally, superimposed with synthetic measurement noise. These synthetic MIPAS measurements were distributed among the participants of the project "Advanced MIPAS level-2 data analysis" (AMIL2DA), who performed temperature and species abundance profile retrievals by inverse radiative transfer calculations. While the retrieved profiles of atmospheric state parameters reflect some characteristics of the individual data processors, it was shown that all the data processors under investigation are capable of producing reliable results in the sense that deviations of retrieved results from the reference profiles are within the margin that is consistent with analytical error estimation.
KW - Atmospheric Composition and Structure: Middle atmosphere-composition and chemistry
KW - Global Change: Atmosphere (0315
KW - 0325)
KW - Global Change: Remote sensing
KW - MIPAS
KW - retrieval
KW - remote sensing
U2 - 10.1029/2003JD003835
DO - 10.1029/2003JD003835
M3 - Article
SN - 2169-897X
VL - 108
JO - Journal of Geophysical Research - Atmospheres
JF - Journal of Geophysical Research - Atmospheres
IS - D23
ER -