生物原型挥发性有机化合物在秋冬期间主导了中国四川盆地近地臭氧的产生
Dasheng Huang1, Qing Li2, Yan Han3
1Research Center for Atmospheric Environment, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; College of Resources and Environment, Chongqing School, University of the Chinese Academy of Sciences (UCAS Chongqing), Chongqing 400714, China.
Journal of environmental sciences (China)
|February 26, 2024
概括
四川盆地臭氧 (O3) 形成受到VOC的限制,而生物源的VOC (BVOC) 是最重要的前体. 这项研究强调了BVOCs.
科学领域:
- 大气化学和空气质量研究大气化学和空气质量研究
- 环境科学与污染研究
背景情况:
- 四川盆地的空气质量很复杂,受到臭氧 (O3) 和细颗粒物 (PM2.5) 的影响.
- 了解O3的形成,特别是在秋季和冬季,对于评估大气氧化能力至关重要.
研究的目的:
- 调查夏末,初秋和冬季在重庆农村地区O3及其前体的形成.
- 确定O3形成对各种前体的敏感性,包括挥发性有机化合物 (VOC),一氧化碳 (CO) 和氧化 (NOx).
主要方法:
- 使用质子转移反应飞行时间质谱法 (PTR-ToF-MS) 进行了持续的现场观察,以测量VOC度.
- 使用零维大气盒模型,使用相对增量反应率 (RIR) 分析O3形成的灵敏度.
主要成果:
- 总VOC度因季节而异,人类引起的VOCs (AVOCs) 和生物引起的VOCs (BVOCs) 的贡献不同.
- 研究区域的O3形成被确定为在VOC限制的状态下.
- 生物源的挥发性有机物 (BVOC) 呈现出最高的相对增量反应率 (RIR),表明它们是O3形成最敏感的前体,特别是在冬季.
结论:
- 在研究的四川盆地地区,臭氧形成主要受VOCs的限制,而BVOCs扮演着重要的角色.
- 这些发现对于了解该地区冬季O3形成机制和气溶的二次形成至关重要.
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