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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Emission factors of hydrocarbons, halocarbons, trace gases and particles from biomass burning in Brazil
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Emission factors of hydrocarbons, halocarbons, trace gases and particles from biomass burning in Brazil

机译：巴西生物质燃烧产生的碳氢化合物，卤代烃，微量气体和颗粒的排放因子

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Airborne measurements of the emissions of gases and particles from 19 individual forest, cerrado, and pasture fires in Brazil were obtained during the Smoke, Clouds, and Radiation-Brazil (SCAR-B) study in August-September 1995. Emission factors were determined for a number of major and minor gaseous and particulate species, including carbon dioxide, carbon monoxide, sulfur dioxide, nitrogen oxides, methane, nonmethane hydrocarbons, halocarbons, particulate (black and organic) carbon, and particulate ionic species. The magnitude of the emission factors for gaseous species were determined primarily by the relative amounts of flaming and smoldering combustion, rather than differences in vegetation type. Hydrocarbons and halocarbons were well correlated with CO, which is indicative of emissions primarily associated with smoldering combustion. Although there was large variability between fires, higher emission factors for SO2 and NOx were associated with an increased ratio of flaming to smoldering combustion; this could be due to variations in the amounts of sulfur and nitrogen in the fuels. Emission factors for particles were not so clearly associated with smoldering combustion as those for hydrocarbons. The emission factors measured in this study are similar to those measured previously in Brazil and Africa. However, particle emission factors from fires in Brazil appear to be roughly 20 to 40% lower than those from North American boreal forest fires. [References: 37]
机译：在1995年8月至9月进行的烟，云和巴西辐射实验（SCAR-B）中，对巴西19种森林，塞拉多和牧场大火的气体和颗粒物的排放进行了航空测量。确定了排放因子许多主要和次要的气态和颗粒物，包括二氧化碳，一氧化碳，二氧化硫，氮氧化物，甲烷，非甲烷碳氢化合物，卤代烃，颗粒（黑色和有机）碳和颗粒离子物。气态物质排放因子的大小主要由燃烧和阴燃的相对量决定，而不是由植被类型的差异决定。碳氢化合物和卤代烃与一氧化碳密切相关，这表明主要与阴燃有关的排放。尽管火灾之间的差异很大，但SO2和NOx的较高排放因子与燃烧与阴燃的比率增加有关。这可能是由于燃料中硫和氮含量的变化所致。与碳氢化合物相比，颗粒物的排放因子与阴燃无关。在这项研究中测得的排放因子与之前在巴西和非洲测得的相似。但是，巴西大火的颗粒物排放因子似乎比北美北方森林大火的颗粒物排放因子低约20％至40％。 [参考：37]

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