Non-local thermodynamic equilibrium limb radiances for the MIPAS instrument on Envisat-1

DOI: 
10.1016/S0022-4073(97)00128-3
Publication date: 
01/05/1998
Main author: 
Lopez-Puertas, M
IAA authors: 
Lopez-Puertas, M
Authors: 
Lopez-Puertas, M; Zaragoza, G; Lopez-Valverde, MA; Martin-Torres, FJ; Shved, GM; Manuilova, RO; Kutepov, AA; Gusev, O; Von Clarmann, T; Linden, A; Stiller, G; Wegner, A; Oelhaf, H; Edwards, DP; Flaud, JM
Journal: 
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
Publication type: 
Article
Volume: 
59
Pages: 
377-403
Number: 
Abstract: 
An evaluation of the effects that the assumption of local thermodynamic equilibrium (LTE) has on the retrieval of pressure, temperature and the five primary target gases (O-3, H2O, CH4, N2O, and HNO3) from spectra to be taken by Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on the Envisat-1 platform has been conducted. For doing so, non-LTE and LTE limb radiances in the spectral range of 689-2275 cm(-1) (4.15-14.6 mu m) with a resolution of 0.05 cm(-1) at tangent heights from 10 to 70 km have been computed. These calculations included the most updated non-LTE populations of a large number of vibrational levels of the CO2, O-3, H2O, CH4, N2O and HNO3 molecules which cause the most prominent atmospheric infrared emissions. A discussion of the most important non-LTE effects on the limb radiances as well as on the retrievals of pressure-temperature and volume mixing ratios of O-3, H2O, CH4, N2O, and HNO3 is presented, together with the most important non-LTE issues that could be studied with the future coming of MIPAS data. (C) 1998 Elsevier Science Ltd. All rights reserved.
Database: 
WOK
Keywords: