Exceptional emissions of NH3 and HCOOH in the 2010 Russian wildfires 1Spectroscopie de l'Atmosphère, Chimie Quantique et Photophysique, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium
18 Apr 2013
2UPMC Univ. Paris 06, Université Versailles St.-Quentin, CNRS/INSU, LATMOS-IPSL, Paris, France
3UPMC Univ. Paris 06, CNRS/INSU, LMD-IPSL, Paris, France
Received: 25 October 2012 – Published in Atmos. Chem. Phys. Discuss.: 07 December 2012 Abstract. 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 (NH3) 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 NH3) of magnitude larger than typical background values.
The temporal evolution of NH3 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 (NH3) and 0.9–3.9 Tg (HCOOH). For
NH3 and HCOOH, these quantities are comparable to what is
emitted in the course of a whole year by all extratropical forest fires.
Revised: 18 March 2013 – Accepted: 22 March 2013 – Published: 18 April 2013
Citation: R'Honi, Y., Clarisse, L., Clerbaux, C., Hurtmans, D., Duflot, V., Turquety, S., Ngadi, Y., and Coheur, P.-F.: Exceptional emissions of NH3 and HCOOH in the 2010 Russian wildfires, Atmos. Chem. Phys., 13, 4171-4181, doi:10.5194/acp-13-4171-2013, 2013.