ACPD Atmospheric Chemistry and Physics Discussions ACPD 1680-7375 Copernicus GmbH Göttingen, Germany 10.5194/acpd-9-8307-2009 Monitoring of atmospheric composition using the thermal infrared IASI/MetOp sounder Clerbaux C. 1 2 Boynard A. 1 3 Clarisse L. 2 George M. 1 Hadji-Lazaro J. 1 Herbin H. 2 4 Hurtmans D. 2 Pommier M. 1 Razavi A. 2 Turquety S. 1 5 Wespes C. 2 Coheur P.-F. 2 UPMC Univ Paris 06, CNRS UMR8190, LATMOS/IPSL, Paris, France Spectroscopie de l'Atmosphère, Chimie Quantique et Photophysique, Université Libre de Bruxelles (ULB), Brussels, Belgium Université Paris 12 et 7, CNRS UMR 7583, Laboratoire Interuniversitaire des Systèmes Atmosphériques/IPSL, Créteil, France now at: Laboratoire d'Optique Atmosphérique, Université des Sciences et Technologies de Lille, Villeneuve d'Ascq cedex, France now at: UPMC Univ Paris 06, CNRS UMR8539, Laboratoire de Météorologie Dynamique/IPSL, Paris, France 30 03 2009 9 2 8307 8339 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.atmos-chem-phys-discuss.net/9/8307/2009/acpd-9-8307-2009.html The full text article is available as a PDF file from http://www.atmos-chem-phys-discuss.net/9/8307/2009/acpd-9-8307-2009.pdf

Atmospheric remote sensing from satellite is an essential component of the observational strategy deployed to monitor atmospheric pollution and changing composition. The IASI nadir looking thermal infrared sounder onboard MetOp will provide 15 years of global scale observations for a series of key atmospheric species, with unprecedented spatial sampling and coverage. This paper gives an overview of the instrument's capability for measuring atmospheric composition in the perspective of chemistry and air quality studies. The assessment is made in terms of species, accuracy and vertical information. Global distributions are presented for CO, CH<sub>4</sub>, O<sub>3</sub> (total and tropospheric), HNO<sub>3</sub>, NH<sub>3</sub> and volcanic SO<sub>2</sub>. Local distributions of organic species measured during fire events, such as C<sub>2</sub>H<sub>4</sub>, CH<sub>3</sub>OH, HCOOH, and PAN are also shown. For each species or process, the link is made to specialized papers in this issue.

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