A review of biomass burning emissions part II: intensive physical properties of biomass burning particles

[摘要] The last decade has seen tremendous advances in atmospheric aerosol particleresearch that is often performed in the context of climate and global changescience. Biomass burning, one of the largest sources of accumulation modeparticles globally, has been closely studied for its radiative, geochemical,and dynamic impacts. These studies have taken many forms includinglaboratory burns, in situ experiments, remote sensing, and modeling. While thediffering perspectives of these studies have ultimately improved ourqualitative understanding of biomass-burning issues, the varied nature ofthe work make inter-comparisons and resolutions of some specific issuesdifficult. In short, the literature base has become a milieu of small piecesof the biomass-burning puzzle. This manuscript, the second part of four,examines the properties of biomass-burning particle emissions. Here wereview and discuss the literature concerning the measurement of smokeparticle size, chemistry, thermodynamic properties, and emission factors.Where appropriate, critiques of measurement techniques are presented. Weshow that very large differences in measured particle properties haveappeared in the literature, in particular with regards to particle carbonbudgets. We investigate emissions uncertainties using scale analyses, whichshows that while emission factors for grass and brush are relatively wellknown, very large uncertainties still exist in emission factors of boreal,temperate and some tropical forests. Based on an uncertainty analysis of thecommunity data set of biomass burning measurements, we present simplifiedmodels for particle size and emission factors. We close this review paperwith a discussion of the community experimental data, point to lapses in thedata set, and prioritize future research topics.

[学科分类] 大气科学