1Finnish Meteorological Institute, Helsinki, Finland
2Russian State Hydrometeorological University, St. Petersburg, Russia
3St.Petersburg Research Centre for Environmental Safety, St. Petersburg, Russia
4Lappeenranta University of Technology, Lappeenranta, Finland
Received: 09 Jul 2012 – Published in Atmos. Chem. Phys. Discuss.: 02 Aug 2012
Abstract. The problem of characteristic vertical profile of smoke released from wildland 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) satellite observations of active wildland fires, and (iii) meteorological conditions evaluated for each fire using output of the numerical weather prediction model. Injection profiles of the plumes from all fires recorded globally from March 2000 till November 2012 are estimated with a time step of 1 h. The resulting 4-dimensional dataset is split into daytime and nighttime subsets. The subsets are projected onto a global grid with a resolution of 1° × 1° × 500 m, aggregated to a monthly level, and normalised by total emissions in each vertical column. Evaluation of the obtained dataset was performed in several ways. Firstly, the quality of the semi-empirical formula for plume-top computations was evaluated using updated MISR fire Plume Height Project data. Secondly, the upper percentiles of the profiles are compared with an independent dataset of space lidar CALIOP. Thirdly, the results are compared with the distribution suggested for AEROCOM modelling community. Finally, the inter-annual variations of the calculated profiles are estimated.
Revised: 08 May 2013 – Accepted: 10 Jun 2013 – Published: 24 Jul 2013
Citation: Sofiev, M., Vankevich, R., Ermakova, T., and Hakkarainen, J.: Global mapping of maximum emission heights and resulting vertical profiles of wildfire emissions, Atmos. Chem. Phys., 13, 7039-7052, doi:10.5194/acp-13-7039-2013, 2013.