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@ARTICLE{Komenda:34166,
      author       = {Komenda, M. and Koppmann, R.},
      title        = {{M}onoterpene emissions from {S}cots pine ({P}inus
                      {S}ylvestris) : field studies of emission rate
                      variabilities},
      journal      = {Journal of Geophysical Research},
      volume       = {107},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-34166},
      pages        = {D13},
      year         = {2002},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] Monoterpene emission rates from young and adult Scots
                      pines (Pinus sylvestris), a typical central European
                      conifer, were measured under ambient conditions using a
                      dynamic enclosure chamber. We investigated diurnal and
                      seasonal cycles of monoterpene emissions and
                      branch-to-branch and plant-to-plant variabilities of
                      emission rates. The four most abundant monoterpenes usually
                      emitted from Pinus sylvestris were alpha-pinene, 3-carene,
                      camphene, and beta-pinene. Emissions of individual
                      monoterpenes were highly correlated to each other and
                      increased exponentially with temperature. We obtained beta
                      coefficients for the temperature dependence of different
                      monoterpenes between 0.08 and 0.13 K-1. The beta
                      coefficients varied with season by a factor of 2; the
                      standard emission rates varied by more than 1 order of
                      magnitude. Highest standard emission rates were found in
                      April; lowest standard emission rates were found in July and
                      October. In July and October the standard emission rates
                      from two different branches of the same tree showed no
                      significant differences; in September they differed by a
                      factor of 2. Seasonal variations of a single branch and
                      branch-to-branch variations in the spectrum of emitted
                      monoterpenes were small. On the other hand, different
                      individual Scots pines emitted a completely different
                      spectrum of monoterpenes, indicating that the monoterpene
                      emission spectrum is only typical for an individual plant
                      but not for the whole plant species. The temperature
                      normalized standard emission rates were found to be highly
                      variable. Values for the sum of monoterpenes ranged between
                      0.06 and 3.7 mug( dry weight)(-1) h(-1) (micrograms
                      monoterpenes per gram dry weight (dw) of needles and hour).
                      Temperature-normalized monoterpene emission rates and
                      temperature dependencies of the emissions were used to
                      calculate monthly flux estimates of monoterpenes for the
                      Hartheimer Wald.},
      keywords     = {J (WoSType)},
      cin          = {ICG-II},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB48},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000178977100024},
      doi          = {10.1029/2001JD000691},
      url          = {https://juser.fz-juelich.de/record/34166},
}