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@ARTICLE{Novelli:856152,
      author       = {Novelli, Anna and Kaminski, Martin and Rolletter, Michael
                      and Acir, Ismail-Hakki and Bohn, Birger and Dorn, Hans-Peter
                      and Li, Xin and Lutz, Anna and Nehr, Sascha and Rohrer,
                      Franz and Tillmann, Ralf and Wegener, Robert and Holland,
                      Frank and Hofzumahaus, Andreas and Kiendler-Scharr, Astrid
                      and Wahner, Andreas and Fuchs, Hendrik},
      title        = {{E}valuation of {OH} and {HO}2 concentrations and their
                      budgets during photooxidation of 2-methyl-3-butene-2-ol
                      ({MBO}) in the atmospheric simulation chamber {SAPHIR}},
      journal      = {Atmospheric chemistry and physics},
      volume       = {18},
      number       = {15},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2018-05788},
      pages        = {11409 - 11422},
      year         = {2018},
      abstract     = {Several previous field studies have reported unexpectedly
                      large concentrations of hydroxyl and hydroperoxyl radicals
                      (OH and HO2, respectively) in forested environments that
                      could not be explained by the traditional oxidation
                      mechanisms that largely underestimated the observations.
                      These environments were characterized by large
                      concentrations of biogenic volatile organic compounds (BVOC)
                      and low nitrogen oxide concentration. In isoprene-dominated
                      environments, models developed to simulate atmospheric
                      photochemistry generally underestimated the observed OH
                      radical concentrations. In contrast, HO2 radical
                      concentration showed large discrepancies with model
                      simulations mainly in non-isoprene-dominated forested
                      environments. An abundant BVOC emitted by lodgepole and
                      ponderosa pines is 2-methyl-3-butene-2-ol (MBO), observed in
                      large concentrations for studies where the HO2 concentration
                      was poorly described by model simulations. In this work, the
                      photooxidation of MBO by OH was investigated for NO
                      concentrations lower than 200pptv in the atmospheric
                      simulation chamber SAPHIR at Forschungszentrum Jülich.
                      Measurements of OH and HO2 radicals, OH reactivity (kOH),
                      MBO, OH precursors, and organic products (acetone and
                      formaldehyde) were used to test our current understanding of
                      the OH-oxidation mechanisms for MBO by comparing
                      measurements with model calculations. All the measured trace
                      gases agreed well with the model results (within $15\%)$
                      indicating a well understood mechanism for the MBO oxidation
                      by OH. Therefore, the oxidation of MBO cannot contribute to
                      reconciling the unexplained high OH and HO2 radical
                      concentrations found in previous field studies.},
      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},
      UT           = {WOS:000441652600001},
      doi          = {10.5194/acp-18-11409-2018},
      url          = {https://juser.fz-juelich.de/record/856152},
}