Atmos. Chem. Phys. Discuss., 12, 19209-19241, 2012
© Author(s) 2012. This work is distributed
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Global mapping of vertical injection profiles of wild-fire emission
M. Sofiev1, R. Vankevich2, T. Ermakova2, and J. Hakkarainen3
1Finnish Meteorological Institute, Helsinki, Finland
2Russian State Hydrometeorological University, St. Petersburg, Russia
3Lappeenranta University of Technology, Lappeenranta, Finland

Abstract. A problem of a characteristic vertical profile of smoke released from wild-land fires is considered. A methodology for bottom-up evaluation of this profile is suggested and a corresponding global dataset is calculated. The profile estimation is based on: (i) a semi-empirical formula for plume-top height recently suggested by the authors, (ii) MODIS satellite observations of active wild-land fires, and (iii) meteorological conditions evaluated at each fireplace using output of ECMWF weather prediction model. Plumes from all fires recorded globally during two arbitrarily picked years 2001 and 2008 are evaluated and their smoke injection profiles are estimated with a time step of 3 h. The resulting 4-dimensional dataset is split to day- and night-time subsets. Each of the subsets is projected to global grid with resolution 1° × 1° × 500 m, averaged to monthly level, and normalised with total emission. Evaluation of the obtained dataset was performed at several levels. Firstly, the quality of the semi-empirical formula for plume-top computations was evaluated using recent additions to the MISR fire plume-height dataset. Secondly, the obtained maps of injection profiles are compared with another global distribution available from literature. Thirdly, the upper percentiles of the profiles are compared with an independent dataset of space-based lidar CALIOP. Finally, the stability of the calculated profiles with regard to inter-annual variations of the fire activity and meteorological conditions is roughly estimated by comparing the sub-sets for 2001 and 2008.

Citation: Sofiev, M., Vankevich, R., Ermakova, T., and Hakkarainen, J.: Global mapping of vertical injection profiles of wild-fire emission, Atmos. Chem. Phys. Discuss., 12, 19209-19241, doi:10.5194/acpd-12-19209-2012, 2012.
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