Time evolution of temperature profiles retrieved from 13 years of IASI data using an artificial neural network

Marie Bouillon (1) , Sarah Safieddine (1) , Simon Whitburn (2) , Lieven Clarisse (2) , Filipe Aires (3) , Victor Pellet (3) , Olivier Lezeaux (4) , Noëlle A. Scott (5) , Marie Doutriaux-Boucher (6) , Cathy Clerbaux (1, 2)

1 TROPO - LATMOS
2 SQUARES - Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing
3 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique et Atmosphères = Laboratory for Studies of Radiation and Matter in Astrophysics and Atmospheres
4 Sté SPASCIA
5 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
6 EUMETSAT - European Organisation for the Exploitation of Meteorological Satellites

The three IASI instruments, launched in 2006, 2012, and 2018, are key instruments to weather forecasting, and most meteorological centers assimilate IASI nadir radiance data into atmospheric models to feed their forecasts. The EUropean organisation for the exploitation of METeorological SATellites (EUMETSAT) recently released a reprocessed homogeneous radiance record for the whole IASI observation period, from which thirteen years (2008-2020) of temperature profiles can be obtained. In this work, atmospheric temperatures at different altitudes are retrieved from IASI radiances measured in the carbon dioxide absorption bands (654-800 cm-1 and 2250-2400 cm-1) by selecting the channels that are the most sensitive to the temperature at different altitudes. We rely on an Artificial Neural Network (ANN) to retrieve atmospheric temperatures from a selected set of IASI radiances. We trained the ANN with IASI radiances as input and the

Domaines: Physique Atmosphérique et Océanique [physics.ao-ph]

Marie Bouillon, Sarah Safieddine, Simon Whitburn, Lieven Clarisse, Filipe Aires, et al.. Time evolution of temperature profiles retrieved from 13 years of IASI data using an artificial neural network. Atmospheric Measurement Techniques Discussions, 2022, pp.(Under Review). ⟨10.5194/amt-2021-302⟩. ⟨insu-03407369v1⟩