来自生物质燃烧的大量排放会影响亚洲的长期大气化学
Di Chang1, Qinyi Li2,3,4, Zhe Wang5
1Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz 55128, Germany.
National science review
|September 23, 2024
概括
生物质燃烧是大气的重要来源,影响空气质量和氧化剂. 这项研究量化了亚洲的长期排放及其化学效应,揭示了生物质燃烧在大气过程中的更大作用.
科学领域:
- 大气化学 大气化学
- 气候科学 气候科学
- 环境监测 环境监测
背景情况:
- 生物质燃烧 (BB) 显著影响大气组成,但排放量仍未得到量化.
- 反应性化学在大气过程和空气质量方面发挥着至关重要的作用.
- 关于BB的的长期趋势和区域影响的数据有限.
研究的目的:
- 开发一个高分辨率的,长期排放库存的亚洲BB的化合物.
- 用全球化学气候模型评估BB衍生的对大气的影响.
- 了解BB排放在大气化学和空气质量中的演变作用.
主要方法:
- 利用卫星观测创建一个长期 (2001-2018) 亚洲的HCl,化物和CH3Cl的BB排放清单.
- 亚洲BB估计的平均排放量,确定主要贡献的国家.
- 将新的排放清单纳入CAM-Chem全球化学气候模型.
主要成果:
- 亚洲BB的估计年平均排放量为730 Gg/年,其中中国,缅甸和印度是主要贡献者.
- 观察到明显的季节性模式和由农业实践驱动的显著的空间/年间变化.
- 模拟升高的HCl和CH3Cl水平以及臭氧 (高达3.1%) 和OH基 (高达17%) 的显著变化.
结论:
- 生物质燃烧是大气中大量的来源,影响氧化剂水平和大气化学.
- BB排放在大气氧化过程中扮演的角色比以前被认为的更为重要.
- 未来BB活动的增加可能会显著影响未来的空气质量,特别是在受控的人为排放的情况下.
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