Cropland nitrogen dioxide emissions and effects on the ozone pollution in the North China plain.
Cropland nitrogen dioxide emissions and effects on the ozone pollution in the North China plain.
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DOI：
10.1016/j.envpol.2021.118617
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发表时间：
2021-12
影响因子：
8.9
通讯作者：
Ruonan Wang;N. Bei;Jiarui Wu;Xia Li;Sui-xin Liu;Jiaoyang Yu;Qianqian Jiang;X. Tie;Guohui Li
中科院分区：
文献类型：
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作者：
Ruonan Wang;N. Bei;Jiarui Wu;Xia Li;Sui-xin Liu;Jiaoyang Yu;Qianqian Jiang;X. Tie;Guohui Li
土壤二氧化氮(NOX=NO2+NNO)排放量已被测量并估计为全球仅次于化石燃料燃烧源的第二大NOX负担贡献者。在区域大气化学模型的空气污染模拟中，农田的NOX排放容易被低估或忽视。利用WRF-CHEM模式，在地面和空间观测NO2的约束下，以生长季为例，研究了中国平原北部农田NOX排放及其对近地表臭氧(O3)污染的贡献。模型模拟显示，在没有卫星测量的NO2柱密度的限制下，农田NOX的排放量被低估了约80%。据估计，在生长季节，生物来源的NOX源占NCP人为NOX排放的一半。此外，农田NOX源对NCP中最大日平均8hO_3浓度的贡献率约为5.0%，对NO2浓度的贡献率约为27.7%。我们的结果表明，农业NOX排放对夏季空气质量的影响是不可忽视的，在设计减排策略时需要考虑。
Soil nitrogen dioxide (NOX= NO2+ NO) emissions have been measured and estimated to be the second most significant contributor to the NOXburden following the fossil fuel combustion source globally. NOXemissions from croplands are subject to being underestimated or overlooked in air pollution simulations of regional atmospheric chemistry models. With constraints of ground and space observations of NO2, the WRF-Chem model is used to investigate the cropland NOXemission and its contribution to the near-surface ozone (O3) pollution in North China Plain (NCP) during a growing season as a case study. Model simulations have revealed that the cropland NOXemissions are underestimated by around 80% without constraints of satellite measured NO2column densities. The biogenic NOXsource is estimated to account for half of the anthropogenic NOXemissions in the NCP during the growing season. Additionally, the cropland NOXsource contributes around 5.0% of the maximum daily average 8h O3concentration and 27.7% of NO2concentration in the NCP. Our results suggest the agriculture NOXemission exerts non-negligible impacts on the summertime air quality and needs to be considered when designing emission abatement strategies.