Water vapor release from biomass combustion R. S. Parmar1, M. Welling1, M. O. Andreae1, and G. Helas1,* 1Max Planck Institute for Chemistry, Biogeochemistry Department, P.O. Box 3060, 55020 Mainz, Germany *now at: IIMT Engineering College, Department of Applied Science, Meerut 250001 (UP), India
Abstract. We report on the emission of water vapor from biomass combustion. Concurrent
measurements of carbon monoxide and carbon dioxide are used to scale the
concentrations of water vapor found, and are referenced to carbon in the
biomass. The investigated fuel types include hardwood (oak and African
musasa), softwood (pine and spruce, partly with green needles), and African
savanna grass. The session-averaged ratio of H2O to the sum of CO and
CO2 in the emissions from 16 combustion experiments ranged from 1.2 to
3.7, indicating the presence of water that is not chemically bound. This
non-bound biomass moisture content ranged from 33% in the dry African
hardwood, musasa, to 220% in fresh pine branches with needles. The
moisture content from fresh biomass contributes significantly to the water
vapor in biomass burning emissions, and its influence on the behavior of
fire plumes and pyro-cumulus clouds needs to be evaluated.
Citation: Parmar, R. S., Welling, M., Andreae, M. O., and Helas, G.: Water vapor release from biomass combustion, Atmos. Chem. Phys., 8, 6147-6153, doi:10.5194/acp-8-6147-2008, 2008.