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@ARTICLE{Rolletter:1040968,
      author       = {Rolletter, Michael and Hofzumahaus, Andreas and Fuchs,
                      Hendrik and Novelli, Anna and Wahner, Andreas},
      title        = {{K}inetics of the reactions of {OH} with {CO}, {NO},and
                      {NO}2 and of {HO}2 with {NO}2 in air attropospheric water
                      vapour concentrations},
      journal      = {Atmospheric chemistry and physics},
      volume       = {25},
      number       = {6},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2025-02090},
      pages        = {3481 - 3502},
      year         = {2025},
      abstract     = {The termolecular reactions of hydroxyl radicals (OH) with
                      carbon monoxide (CO), nitric oxide (NO), and nitrogen
                      dioxides (NO2) and the termolecular reaction of hydroperoxy
                      radicals (HO2) with NO2 greatly impact the atmospheric
                      oxidation efficiency. Few studies have directly measured the
                      pressure-dependent rate coefficients in air at 1 atm
                      pressure and water vapour as third-body collision partners.
                      In this work, rate coefficients were measured with a high
                      accuracy $(<5 \%)$ at 1 atm pressure, at room
                      temperature, and in humidified air using laser flash
                      photolysis and detection of the radical decay by
                      laser-induced fluorescence. The rate coefficients derived in
                      dry air are cm3 s−1 for the OH reaction with CO,
                       cm3 s−1 for the OH reaction with NO,  cm3 s−1
                      for the OH reaction with NO2, and  cm3 s−1 for the HO2
                      reaction with NO2. For the OH reactions with CO and NO, no
                      dependence on water vapour was observed for the range of
                      water partial pressures tested (3 to 22 hPa), and for NO2,
                      only a weak increase of $3 \%$ was measured, in agreement
                      with the study by Amedro et al. (2020). For the rate
                      coefficient of HO2 with NO2 an enhancement of up to
                      $25 \%$ was observed. This can be explained by a faster
                      rate coefficient of the reaction of the HO2–water complex
                      with NO2 having a value of  cm3 s−1.},
      cin          = {ICE-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)ICE-3-20101013},
      pnm          = {2111 - Air Quality (POF4-211)},
      pid          = {G:(DE-HGF)POF4-2111},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001450816600001},
      doi          = {10.5194/acp-25-3481-2025},
      url          = {https://juser.fz-juelich.de/record/1040968},
}