Photochemistry of the African troposphere: Influence of biomass‐burning emissions
Photochemistry of the African troposphere: Influence of biomass‐burning emissions
复制标题
非洲对流层的光化学：生物质燃烧排放的影响
DOI：
--
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
G. Helas
中科院分区：
文献类型：
--
作者：
L. Marufu;F. Dentener;J. Lelieveld;M. Andreae;G. Helas
1993年，根据全球模式计算，估计了非洲热带稀树草原、森林砍伐、农业废物燃烧和生物燃料消耗的生物质燃烧（热解）排放对对流层臭氧丰度的相对重要性。我们还计算了这种排放源对世界其他地区对流层臭氧的重要性，并将其与非洲区域和全球范围内的不同来源进行了比较。参考年非洲上空对流层臭氧总丰度的估计年平均值为26 Tg。热源、工业、生物和闪电排放分别占16%、19%、12%和27%，而平流层臭氧输入占26%。在非洲上空的行星边界层中，生物质燃烧的贡献为24%。非洲与生物质燃烧有关的臭氧有很大一部分被带离非洲大陆。在全球范围内，生物质燃烧对对流层臭氧的贡献率为0.9%。我们的模型计算表明，非洲是一个最重要的地区，生物质燃烧相关的对流层臭氧，占全球每年的热致臭氧增强29 Tg在1993年的35%。
The relative importance of biomass-burning (pyrogenic) emissions from savannas, deforestation, agricultural waste burning, and biofuel consumption to tropospheric ozone abundance over Africa has been estimated for the year 1993, on the basis of global model calculations. We also calculated the importance of this emission source to tropospheric ozone in other regions of the world and compared it to different sources on the African regional and global scales. The estimated annual average total tropospheric ozone abundance over Africa for the reference year is 26 Tg. Pyrogenic, industrial, biogenic, and lightning emissions account for 16, 19, 12, and 27%, respectively, while stratospheric ozone input accounts for 26%. In the planetary boundary layer over Africa, the contribution by biomass burning is ∼24%. A large fraction of the African biomass-burning-related ozone is transported away from the continent. On a global scale, biomass burning contributes ∼9% to tropospheric ozone. Our model calculations suggest that Africa is the single most important region for biomass-burning-related tropospheric ozone, accounting for ∼35% of the global annual pyrogenic ozone enhancement of 29 Tg in 1993.