ACP Atmospheric Chemistry and Physics ACP Atmos. Chem. Phys. 1680-7324 Copernicus Publications Göttingen, Germany 10.5194/acp-13-4171-2013 Exceptional emissions of NH<sub>3</sub> and HCOOH in the 2010 Russian wildfires R'Honi Y. 1 Clarisse L. https://orcid.org/0000-0002-8805-2141 1 Clerbaux C. 1 2 Hurtmans D. 1 Duflot V. 1 Turquety S. 3 Ngadi Y. 1 Coheur P.-F. 1 Spectroscopie de l'Atmosphère, Chimie Quantique et Photophysique, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium UPMC Univ. Paris 06, Université Versailles St.-Quentin, CNRS/INSU, LATMOS-IPSL, Paris, France UPMC Univ. Paris 06, CNRS/INSU, LMD-IPSL, Paris, France 18 04 2013 13 8 4171 4181 Copyright: © 2013 Y. R'Honi et al. 2013 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://acp.copernicus.org/articles/13/4171/2013/acp-13-4171-2013.html The full text article is available as a PDF file from https://acp.copernicus.org/articles/13/4171/2013/acp-13-4171-2013.pdf

In July 2010, several hundred forest and peat fires broke out across central Russia during its hottest summer on record. Here, we analyze these wildfires using observations of the Infrared Atmospheric Sounding Interferometer (IASI). Carbon monoxide (CO), ammonia (NH<sub>3</sub>) and formic acid (HCOOH) total columns are presented for the year 2010. Maximum total columns were found to be one order (for CO and HCOOH) and two orders (for NH<sub>3</sub>) of magnitude larger than typical background values. The temporal evolution of NH<sub>3</sub> and HCOOH enhancement ratios relative to CO are presented. Evidence of secondary formation of HCOOH is found, with enhancement ratios exceeding reported emission ratios in fresh plumes. We estimate the total emitted masses for the period July–August 2010 over the center of western Russia; they are 19–33 Tg (CO), 0.7–2.6 Tg (NH<sub>3</sub>) and 0.9–3.9 Tg (HCOOH). For NH<sub>3</sub> and HCOOH, these quantities are comparable to what is emitted in the course of a whole year by all extratropical forest fires.

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