IASI measurements of reactive trace species in biomass burning plumes 1Spectroscopie de l'Atmosphère, Service de Chimie Quantique et de Photophysique, Université Libre de Bruxelles (U.L.B.), Brussels, Belgium
2UPMC Univ. Paris 06, Université Versailles St-Quentin, CNRS/INSU, LATMOS-IPSL, Paris, France
*now at: UPMC Université Paris 06, Laboratoire de Météorologie Dynamique/IPSL, Ecole Polytechnique, Palaiseau, France
**Research Associate and Scientific Research Worker with the FRS-F.N.R.S, Belgium
Received: 18 February 2009 – Published in Atmos. Chem. Phys. Discuss.: 01 April 2009 Abstract. This work presents observations of a series of short-lived species in
biomass burning plumes from the Infrared Atmospheric Sounding Interferometer
(IASI), launched onboard the MetOp-A platform in October 2006. The strong
fires that have occurred in the Mediterranean Basin – and particularly
Greece – in August 2007, and those in Southern Siberia and Eastern Mongolia
in the early spring of 2008 are selected to support the analyses. We show
that the IASI infrared spectra in these fire plumes contain distinctive
signatures of ammonia (NH3), ethene (C2H4), methanol
(CH3OH) and formic acid (HCOOH) in the atmospheric window between 800
and 1200 cm−1, with some noticeable differences between the plumes.
Peroxyacetyl nitrate (CH3COOONO2, abbreviated as PAN) was also
observed with good confidence in some plumes and a tentative assignment of a
broadband absorption spectral feature to acetic acid (CH3COOH) is made.
For several of these species these are the first reported measurements made
from space in nadir geometry. The IASI measurements are analyzed for plume
height and concentration distributions of NH3, C2H4 and
CH3OH. The Greek fires are studied in greater detail for the days
associated with the largest emissions. In addition to providing information
on the spatial extent of the plume, the IASI retrievals allow an estimate of
the total mass emissions for NH3, C2H4 and CH3OH.
Enhancement ratios are calculated for the latter relative to carbon monoxide
(CO), giving insight in the chemical processes occurring during the
transport, the first day after the emission.
Revised: 05 August 2009 – Accepted: 05 August 2009 – Published: 10 August 2009
Citation: Coheur, P.-F., Clarisse, L., Turquety, S., Hurtmans, D., and Clerbaux, C.: IASI measurements of reactive trace species in biomass burning plumes, Atmos. Chem. Phys., 9, 5655-5667, doi:10.5194/acp-9-5655-2009, 2009.