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@ARTICLE{Wu:187529,
      author       = {Wu, C. and Pullinen, I. and Andres, S. and Carriero, G. and
                      Fares, S. and Goldbach, H. and Hacker, L. and Kasal, T. and
                      Kiendler-Scharr, A. and Kleist, E. and Paoletti, E. and
                      Wahner, A. and Wildt, Jürgen and Mentel, Th. F.},
      title        = {{I}mpacts of soil moisture on de novo monoterpene emissions
                      from {E}uropean beech, {H}olm oak, {S}cots pine, and
                      {N}orway spruce},
      journal      = {Biogeosciences},
      volume       = {12},
      number       = {1},
      issn         = {1726-4189},
      address      = {Katlenburg-Lindau [u.a.]},
      publisher    = {Copernicus},
      reportid     = {FZJ-2015-01158},
      pages        = {177 - 191},
      year         = {2015},
      abstract     = {Impacts of soil moisture on de novo monoterpene (MT)
                      emissions from Holm oak, European beech, Scots pine, and
                      Norway spruce were studied in laboratory experiments. The
                      volumetric water content of the soil, Θ, was used as the
                      reference quantity to parameterize the dependency of MT
                      emissions on soil moisture and to characterize the severity
                      of the drought.When Θ dropped from 0.4 m3 × m−3 to ~0.2
                      m3 × m−3 slight increases of de novo MT emissions were
                      observed but with further progressing drought the emissions
                      decreased to almost zero. In most cases the increases of MT
                      emissions observed under conditions of mild drought were
                      explainable by increases of leaf temperature due to lowered
                      transpirational cooling. When Θ fell below certain
                      thresholds, MT emissions decreased simultaneously with Θ
                      and the relationship between Θ and MT emissions was
                      approximately linear. The thresholds of Θ (0.044–0.19 m3
                      × m−3) were determined, as well as other parameters
                      required to describe the soil moisture dependence of de novo
                      MT emissions for application in the Model of Emissions of
                      Gases and Aerosols from Nature, MEGAN.A factorial approach
                      was found appropriate to describe the impacts of Θ,
                      temperature, and light. Temperature and Θ influenced the
                      emissions largely independently from each other, and, in a
                      similar manner, light intensity and Θ acted independently
                      on de novo MT emissions. The use of Θ as the reference
                      quantity in a factorial approach was tenable in predicting
                      constitutive de novo MT emissions when Θ changed on a time
                      scale of days. Empirical parameterization with Θ as a
                      reference was only unsuccessful when soil moisture changed
                      rapidly},
      cin          = {IEK-8 / IBG-2},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IEK-8-20101013 / I:(DE-Juel1)IBG-2-20101118},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243) / HITEC - Helmholtz
                      Interdisciplinary Doctoral Training in Energy and Climate
                      Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-243 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000347960800011},
      doi          = {10.5194/bg-12-177-2015},
      url          = {https://juser.fz-juelich.de/record/187529},
}