Synergistic effects of biogenic volatile organic compounds and soil nitric oxide emissions on summertime ozone formation in China
Synergistic effects of biogenic volatile organic compounds and soil nitric oxide emissions on summertime ozone formation in China
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生物挥发性有机化合物与土壤一氧化氮排放对中国夏季臭氧形成的协同效应
DOI：
10.1016/j.scitotenv.2022.154218
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发表时间：
2022-03-12
影响因子：
9.8
通讯作者：
Shao, Min
中科院分区：
文献类型：
--
作者：
Chen, Weihua;Guenther, Alex B.;Shao, Min
自然排放在调节地面臭氧（O-3）的形成中起着关键作用，特别是生物挥发性有机化合物（BVOCs）和土壤一氧化氮（SNO）的排放，它们对O-3形成的单独影响已被量化和评估。然而，它们的协同效应仍然不清楚，尚未得到很好的评估。通过应用天气研究和预报（WRF）模式与天然气和气溶胶排放化学模型（WRF/Chem-MEGAN）模型相结合，本研究揭示了在存在足够的BVOC排放时，作为燃料，SNO排放作为燃料添加剂，促进BVOC的化学反应和随后的O-3的产生。因此，2014年中国东部BVOC和SNO排放对夏季O-3产生的协同效应超过其单独效应之和高达10-20 μ g m（-3）。为了将O-3浓度降低到对应于没有BVOC或SNO的自然排放的水平（即，在基准情景下，人为挥发性有机化合物（AVOC）排放量考虑到BVOC和SNO排放量必须减少基准情景的1.76倍。这项研究表明，BVOC和SNO排放的协同效应可以阻碍地面O-3的监管，并随后在中国的人为前体物排放控制施加更严格的要求。这项研究的结果也可以为其他地区仍在对抗地面O-3污染的努力提供信息。
Natural emissions play a key role in modulating the formation of ground-level ozone (O-3), especially emissions of biogenic volatile organic compounds (BVOCs) and soil nitric oxide (SNO), and their individual effects on O-3 formation have been previously quantified and evaluated. However, their synergistic effects remain unclear and have not yet been well assessed. By applying the Weather Research and Forecasting (WRF) model coupled with the Chemistry Model of Emissions of Gases and Aerosols from Nature (WRF/Chem-MEGAN) model, this study reveals that in the presence of sufficient BVOC emissions, which act as a fuel, SNO emissions act as a fuel additive and promote the chemical reactions of BVOCs and the subsequent production of O-3. Consequently, the synergistic effects of BVOC and SNO emissions on summertime O-3 production surpassed the sum of their individual effects by as much as 10-20 mu g m(-3) in eastern China in 2014. In order to reduce O-3 concentration to a level corresponding to no natural emissions of BVOC or SNO (i.e., the BASE scenario), the anthropogenic volatile organic compound (AVOC) emissions in the scenario considers BVOC and SNO emissions must be reduced by 1.76 times that of the BASE scenario. This study demonstrates that the synergistic effects of BVOC and SNO emissions can impede ground-level O-3 regulation and can subsequently impose stricter requirements on anthropogenic precursor emission control in China. The results of this study can also inform efforts in other regions that are still combating ground-level O-3 pollution.