% 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{KiendlerScharr:19819,
      author       = {Kiendler-Scharr, A. and Andres, S. and Bachner, M. and
                      Behnke, K. and Broch, S. and Hofzumahaus, A. and Holland, F.
                      and Kleist, E. and Mentel, T.F. and Rubach, F. and Springer,
                      M. and Steitz, B. and Tillmann, R. and Wahner, A. and
                      Schnitzler, J.-P. and Wildt, J.},
      title        = {{I}soprene in poplar emissions: effects on new particle
                      formation and {OH} concentrations},
      journal      = {Atmospheric chemistry and physics},
      volume       = {12},
      issn         = {1680-7316},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {PreJuSER-19819},
      pages        = {1021 - 1030},
      year         = {2012},
      note         = {The work was supported by the German Science Foundation
                      (DFG) (SCHN653/4 to J.-P. S.) within the German joint
                      research group "Poplar - A Model to Address Tree-Specific
                      Questions" and by the European Community's Seventh Framework
                      Programme ([FP7/2007-2013]) EU project PEGASOS under grant
                      agreement no. 265307.},
      abstract     = {Stress-induced volatile organic compound (VOC) emissions
                      from transgenic Grey poplar modified in isoprene emission
                      potential were used for the investigation of photochemical
                      secondary organic aerosol (SOA) formation. In poplar, acute
                      ozone stress induces the emission of a wide array of VOCs
                      dominated by sesquiterpenes and aromatic VOCs. Constitutive
                      light-dependent emission of isoprene ranged between 66 nmol
                      m(-2) s(-1) in non-transgenic controls (wild type WT) and
                      nearly zero (<0.5 nmol m(-2) s(-1)) in isoprene
                      emission-repressed plants (line RA22), respectively.
                      Nucleation rates of up to 3600 cm(-3) s(-1) were observed in
                      our experiments. In the presence of isoprene new particle
                      formation was suppressed compared to non-isoprene containing
                      VOC mixtures. Compared to isoprene/monoterpene systems
                      emitted from other plants the suppression of nucleation by
                      isoprene was less effective for the VOC mixture emitted from
                      stressed poplar. This is explained by the observed high
                      efficiency of new particle formation for emissions from
                      stressed poplar. Direct measurements of OH in the reaction
                      chamber revealed that the steady state concentration of OH
                      is lower in the presence of isoprene than in the absence of
                      isoprene, supporting the hypothesis that isoprenes'
                      suppressing effect on nucleation is related to radical
                      chemistry. In order to test whether isoprene contributes to
                      SOA mass formation, fully deuterated isoprene (C5D8) was
                      added to the stress-induced emission profile of an isoprene
                      free poplar mutant. Mass spectral analysis showed that,
                      despite the isoprene-induced suppression of particle
                      formation, fractions of deuterated isoprene were
                      incorporated into the SOA. A fractional mass yield of
                      $2.3\%$ of isoprene was observed. Future emission changes
                      due to land use and climate change may therefore affect both
                      gas phase oxidation capacity and new particle number
                      formation.},
      keywords     = {J (WoSType)},
      cin          = {IBG-2 / IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-2-20101118 / I:(DE-Juel1)IEK-8-20101013},
      pnm          = {Terrestrische Umwelt / Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK407 / G:(DE-Juel1)FUEK491},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000300321500027},
      doi          = {10.5194/acp-12-1021-2012},
      url          = {https://juser.fz-juelich.de/record/19819},
}