| Summary: | 1P-1 The IASI instrument was launched at the end of 2006 onboard the MetOp satellite. It uses the thermal infrared spectral range to monitor the atmospheric composition at any location two times per day, and is measuring some of the chemical components playing a key role in the climate system and pollution issues. This instrument has an unprecedented horizontal resolution and coverage, from which global, regional and local distributions of trace gas concentrations can be derived. After a presentation of IASI, the poster shows intercomparisons between ozone profiles monitored by IASI and by different NDACC SAOZ observation. The focus is particularly made on Concordia and Dumont d'Urville stations (Antarctic). A detailed comparison with measurements obtained from balloons sondes during the Concordiasi campaign is also provided. Finally, IASI performances over Antarctica are evaluated and limitations are discussed.
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