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@ARTICLE{Holland:33393,
      author       = {Holland, F. and Hofzumahaus, A. and Schäfer, H.-J. and
                      Kraus, A. and Pätz, H.-W.},
      title        = {{M}easurements of {OH} and {HO}2 radical concentrations and
                      photolysis frequencies during {BERLIOZ}},
      journal      = {Journal of Geophysical Research},
      volume       = {108},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-33393},
      pages        = {D4},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] This paper presents the measurements of OH and HO2
                      radical concentrations as well as photolysis frequencies of
                      different molecules during the Berliner Ozone (BERLIOZ)
                      field experiment in July/August 1998 at the rural site
                      Pabstthum about 50 km NW of Berlin. Radical concentrations
                      were measured using laser-induced fluorescence (LIF)
                      spectroscopy, while filter radiometers and a scanning
                      spectroradiometer were used to obtain photolysis
                      frequencies. The radical data set covers the time period
                      from 20 July to 6 August and consists of more than 6000
                      simultaneous measurements of OH and HO2 with a typical time
                      resolution of about 90 s. The maximum OH and HO2 daytime
                      concentrations were 8 x 10(6) and 8 x 10(8) cm(-3),
                      respectively. While nighttime values of OH were usually
                      below the detection limit of our instrument (3.5 x 10(5)
                      cm(-3)), HO2 did show significant concentrations throughout
                      most of the nights (on average 3 x 10(7) cm(-3)). The OH
                      concentration was mainly controlled by solar UV radiation
                      and showed a high linear correlation with J(O-1 D). A
                      deviation from this general behavior was observed around
                      dawn and dusk, when OH concentrations well above the
                      detection limit were observed, although J(O-1 D) was
                      essentially zero. A comparison with data sets from previous
                      campaigns revealed that even though the linear correlation
                      is found in other environments as well the slope [OH]/ J(O-1
                      D) differs significantly. The diurnal cycles of HO2 were
                      less dependent on the solar actinic flux but were
                      predominantly influenced by NO. During episodes of high NO,
                      HO2 remained below the detection limit (1 x 10(7) cm(-3))
                      but started to rise rapidly as soon as NO started to
                      decrease.},
      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:000181500200001},
      doi          = {10.1029/2001JD001393},
      url          = {https://juser.fz-juelich.de/record/33393},
}