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@ARTICLE{Kleffmann:44373,
      author       = {Kleffmann, J. and Gavriloaiei, T. and Hofzumahaus, A. and
                      Holland, F. and Koppmann, R. and Rupp, L. and Schlosser, E.
                      and Siese, M. and Wahner, A.},
      title        = {{D}aytime formation of nitrous acid: a major source of {OH}
                      radicals in a forest},
      journal      = {Geophysical research letters},
      volume       = {32},
      issn         = {0094-8276},
      address      = {Washington, DC},
      publisher    = {American Geophysical Union},
      reportid     = {PreJuSER-44373},
      pages        = {L05818},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Daytime concentrations of HONO, NOx, OH and photolysis
                      frequencies were measured during the ECHO field campaign in
                      a mixed deciduous forest near Julich, West-Germany, in
                      summer 2003. Midday measurements show clear evidence for a
                      large, yet unexplained daytime source of HONO (similar to
                      500 pptv/h), which represents an important net source of OH
                      radicals due to ongoing HONO photolysis. The evidence for a
                      large HONO daytime source is for the first time completely
                      constrained by measured parameters, needed to determine the
                      daytime budget of HONO. The large contribution of $33\%$ to
                      the primary OH production during noon at the top of the
                      forest canopy suggests that the unexplained source of HONO
                      could have an important impact on the photochemical
                      transformation of biogenically emitted volatile organic
                      compounds (VOCs) by OH into partly oxidized VOCs and
                      secondary organic aerosols during their release from forest
                      regions into the troposphere.},
      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    = {Geosciences, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000227873900007},
      doi          = {10.1029/2005GL022524},
      url          = {https://juser.fz-juelich.de/record/44373},
}