% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Emmerichs:902283,
      author       = {Emmerichs, Tamara and Franco, Bruno and Wespes, Catherine
                      and Kumar, Vinod and Pozzer, Andrea and Rosanka, Simon and
                      Taraborrelli, Domenico},
      title        = {{T}he influence of weather-driven processes on tropospheric
                      ozone},
      journal      = {Atmospheric chemistry and physics / Discussions},
      volume       = {},
      issn         = {1680-7367},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2021-04146},
      pages        = {},
      year         = {2021},
      abstract     = {Abstract. Near-surface ozone is an harmful air pollutant,
                      which is determined to a considerable extent by
                      weather-controlled processes, and may be significantly
                      impacted by water vapour forming complexes with peroxy
                      radicals. The role of water in the reaction of HO2 radical
                      with nitrogen oxides is known from the literature, and in
                      current models the water complex is considered by assuming a
                      linear dependence on water concentrations. In fact, recent
                      experimental evidence has been published, showing the
                      significant role of water on the kinetics of one of the most
                      important reaction for ozone chemistry, namely NO2 + OH.
                      Here, the available kinetic data for the HOx + NOx reactions
                      have been included in the atmospheric chemistry model
                      ECHAM5/MESSy (EMAC) to test its global significance. Among
                      the modified kinetics, the newly added HNO3 channel from HO2
                      + NO, dominates, significantly reducing NO2. A major removal
                      process of near-surface ozone is dry deposition accounting
                      for 20 $\%$ of the total tropospheric ozone loss mostly
                      occurring over vegetation. However, parameterizations for
                      modelling dry deposition represent a major source of
                      uncertainty for tropospheric ozone simulations. This
                      potentially belongs to the reasons why global models, such
                      as EMAC used here, overestimate ozone with respect to
                      observations. In fact, the employed parameterization is
                      hardly sensitive to local meteorological conditions (e.g.,
                      humidity) and lacks non-stomatal deposition. In this study,
                      a dry deposition scheme including these features have been
                      used in EMAC, affecting not only the deposition of ozone but
                      of its precursors, resulting in lower chemical production of
                      ozone. Additionally, we improved the emissions of isoprene
                      and nitrous acid (HONO). Namely, for isoprene emissions we
                      have accounted for the impact of drought stress which
                      confers a higher model sensitivity to meteorology leading to
                      reduced annual emissions down to 32 $\%.$ For HONO, we have
                      implemented soil emissions, which depend on soil moisture
                      and thus on precipitation. We estimate for the first time a
                      global source strength of 7 Tg(N) a−1. Furthermore, the
                      usage of a parameterization for the production of lightning
                      NOx that depends on cloud top height contributes to a more
                      realistic representation of NO2 columns over remote oceans
                      with respect to the satellite measurements of the Ozone
                      Monitoring Instrument (OMI). The combination of all the
                      model modifications reduces the simulated global ozone
                      burden by ≈ 20 $\%$ to 337 Tg, which is in better
                      agreement with recent estimates. By comparing simulation
                      results with measurements from the Infrared Atmospheric
                      Sounding Interferometer (IASI) and the Tropospheric Ozone
                      Assessment Report (TOAR) databases (of 2009) we demonstrate
                      an overall reduction of the ozone bias by a factor of 2.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {2111 - Air Quality (POF4-211)},
      pid          = {G:(DE-HGF)POF4-2111},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.5194/acp-2021-584},
      url          = {https://juser.fz-juelich.de/record/902283},
}