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@ARTICLE{Tan:858323,
      author       = {Tan, Zhaofeng and Lu, Keding and Jiang, Meiqing and Su,
                      Rong and Wang, Hongli and Lou, Shengrong and Fu, Qingyan and
                      Zhai, Chongzhi and Tan, Qinwen and Yue, Dingli and Chen,
                      Duohong and Wang, Zhanshan and Xie, Shaodong and Zeng, Limin
                      and Zhang, Yuanhang},
      title        = {{A}tmospheric oxidation capacity in {C}hinese megacities
                      during photochemical polluted season: radical budget and
                      secondary pollutants formation},
      journal      = {Atmospheric chemistry and physics / Discussions Discussions
                      [...]},
      volume       = {959},
      issn         = {1680-7375},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2018-07211},
      pages        = {1 - 23},
      year         = {2018},
      abstract     = {Atmospheric oxidation capacity is the core of converting
                      fresh-emitted substances to secondary pollutants. In this
                      study, we present the in-situ measurements at four Chinese
                      megacities (Beijing, Shanghai, Guangzhou, and Chongqing) in
                      China during photochemical polluted seasons. The atmospheric
                      oxidation capacity is evaluated using an observational-based
                      model with the input of radical chemistry precursor
                      measurements. The radical budget analysis illustrates the
                      importance of HONO and HCHO photolysis, which contribute
                      nearly half of the total radical primary sources. The
                      radical propagation is efficient due to abundant of NO in
                      the urban environments. Hence, the production rate of
                      secondary pollutants, i.e. ozone and fine particle
                      precursors (H2SO4, HNO3, and ELVOCs) is fast resulting in
                      secondary air pollution. The ozone budget demonstrates that
                      strong ozone production occurs in the urban area which
                      results in fast ozone concentration increase locally and
                      further transported to downwind areas. On the other hand,
                      the O3-NOx-VOC sensitivity tests show that ozone production
                      is VOC-limited, among which alkenes and aromatics should be
                      first mitigated for ozone pollution control in the presented
                      four megacities. However, NOx emission control will lead to
                      more server ozone pollution due to the drawback-effect of
                      NOx reduction. For fine particle pollution, the role of
                      HNO3−NO3− partitioning system is investigated with a
                      thermal dynamic model (ISORROPIA2) due to the importance of
                      particulate nitrate during photochemical polluted seasons.
                      The strong nitrate acid production converts efficiently to
                      nitrate particles due to high RH and ammonium-rich
                      conditions during photochemical polluted seasons. This study
                      highlights the efficient radical chemistry maintains the
                      atmospheric oxidation capacity in Chinese megacities, which
                      results in secondary pollutions characterized by ozone and
                      fine particles.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243)},
      pid          = {G:(DE-HGF)POF3-243},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/acp-2018-959},
      url          = {https://juser.fz-juelich.de/record/858323},
}