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@PHDTHESIS{Wu:283055,
      author       = {Wu, Cheng},
      title        = {{E}missions of {B}iogenic {V}olatile {O}rganic {C}ompounds
                      and {O}zone {B}alance under {F}uture {C}limate {C}onditions},
      volume       = {308},
      school       = {RWTH Aachen},
      type         = {Dr.},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2016-01737},
      isbn         = {978-3-95806-121-7},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {VI, 93 S.},
      year         = {2016},
      note         = {RWTH Aachen, Diss., 2015},
      abstract     = {Ozone (O$_{3}$) is a phytotoxic trace gas in the
                      troposphere where it is photochemically produced from
                      volatile organic compounds (VOCs) and nitrogen oxides
                      (NO$_{x}$ = NO + NO$_{2}$). The dominant sink of O$_{3}$ in
                      the air over areas with dense plant cover is dry deposition
                      on plant surfaces. However, plants canalso contribute to
                      photochemical O$_{3}$ formation because they emit biogenic
                      VOCs (BVOCs). In this study, the role of vegetation for
                      tropospheric ozone balance was investigated by
                      consideringthe following processes: O$_{3}$ depletion by dry
                      deposition on plant surfaces, O$_{3}$ depletion by gas phase
                      reactions with plant emitted BVOCs, and photochemical
                      O$_{3}$ production from BVOCs. Furthermore, drought and heat
                      stress were applied to the plants, and possible impacts of
                      these stresses on plant performance and on the tropospheric
                      ozone balance were investigated. Dry deposition of O$_{3}$
                      was dominated by O$_{3}$ uptake through the plants stomata
                      with negligible losses on cuticle and stem. For strong BVOC
                      emitter, O$_{3}$ destruction by gas phase reactions with
                      BVOCs wassignificant at low NO$_{x}$ conditions. Switching
                      from low NOx to high NO$_{x}$ conditions led to O$_{3}$
                      production. A ratio of O$_{3}$ formation rates over BVOC
                      loss rates was measured for $\alpha$-pinene as single BVOC
                      and for BVOC mixtures emitted from real plants. For O$_{3}$
                      formation under BVOC limited conditions, this ratio was in
                      the range of 2–3 ppb/ppb. The ratio of O$_{3}$ uptake/BVOC
                      emission reflects the capability of aplant as a potential
                      source of O$_{3}$, while NO$_{x}$ concentration and
                      BVOC/NO$_{x}$ ratio determine whether the emitted BVOCs act
                      as an additional sink or a source of O$_{3}$. O$_{3}$ uptake
                      rates and BVOC emission rates are affected by environmental
                      variables such as temperature, light intensity and stresses
                      to plants. The impacts of them are different and thus the
                      capability of a plant to be a source of O$_{3}$ is also
                      affected by these variables. The focus of this work was the
                      evaluation of the impact of drought and heat stress because
                      future climate change will bring more and intense heat waves
                      and elongated drought periods. With the application of
                      moderate drought, the capability of a plant to be a source
                      of O$_{3}$ increased; under conditions of severe drought the
                      impact of plants in the O$_{3}$ balance decreased to almost
                      zero. Heat stress also changes the capability of the plant
                      to be a source of O$_{3}$. However, this change depends on
                      the basic emission mechanisms of BVOCs and the severity of
                      stress.},
      cin          = {IEK-8},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)11 / PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/283055},
}