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@ARTICLE{Novelli:834427,
      author       = {Novelli, Anna and Hens, Korbinian and Tatum Ernest, Cheryl
                      and Martinez, Monica and Nölscher, Anke C. and Sinha,
                      Vinayak and Paasonen, Pauli and Petäjä, Tuukka and
                      Sipilä, Mikko and Elste, Thomas and Plass-Dülmer,
                      Christian and Phillips, Gavin J. and Kubistin, Dagmar and
                      Williams, Jonathan and Vereecken, Luc and Lelieveld, Jos and
                      Harder, Hartwig},
      title        = {{E}stimating the atmospheric concentration of {C}riegee
                      intermediates and their possible interference in a
                      {FAGE}-{LIF} instrument},
      journal      = {Atmospheric chemistry and physics},
      volume       = {17},
      number       = {12},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2017-04384},
      pages        = {7807 - 7826},
      year         = {2017},
      abstract     = {We analysed the extensive dataset from the HUMPPA-COPEC
                      2010 and the HOPE 2012 field campaigns in the boreal forest
                      and rural environments of Finland and Germany, respectively,
                      and estimated the abundance of stabilised Criegee
                      intermediates (SCIs) in the lower troposphere. Based on
                      laboratory tests, we propose that the background OH signal
                      observed in our IPI-LIF-FAGE instrument during the
                      aforementioned campaigns is caused at least partially by
                      SCIs. This hypothesis is based on observed correlations with
                      temperature and with concentrations of unsaturated volatile
                      organic compounds and ozone. Just like SCIs, the background
                      OH concentration can be removed through the addition of
                      sulfur dioxide. SCIs also add to the previously
                      underestimated production rate of sulfuric acid. An average
                      estimate of the SCI concentration of
                       ∼  5.0  ×  104 molecules cm−3 (with
                      an order of magnitude uncertainty) is calculated for the two
                      environments. This implies a very low ambient concentration
                      of SCIs, though, over the boreal forest, significant for the
                      conversion of SO2 into H2SO4. The large uncertainties in
                      these calculations, owing to the many unknowns in the
                      chemistry of Criegee intermediates, emphasise the need to
                      better understand these processes and their potential effect
                      on the self-cleaning capacity of the atmosphere.},
      cin          = {IEK-8},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-8-20101013},
      pnm          = {243 - Tropospheric trace substances and their
                      transformation processes (POF3-243)},
      pid          = {G:(DE-HGF)POF3-243},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000404653100001},
      doi          = {10.5194/acp-17-7807-2017},
      url          = {https://juser.fz-juelich.de/record/834427},
}