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@ARTICLE{Voigt:48506,
      author       = {Voigt, C. and Schlager, H. and Ziereis, H. and Kärcher, B.
                      and Luo, B. P. and Schiller, C. and Krämer, M. and Popp, P.
                      J. and Irie, H. and Kondo, Y.},
      title        = {{N}itric acid uptake in cirrus clouds},
      journal      = {Geophysical research letters},
      volume       = {33},
      issn         = {0094-8276},
      address      = {Washington, DC},
      publisher    = {American Geophysical Union},
      reportid     = {PreJuSER-48506},
      pages        = {L05803},
      year         = {2006},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] Uptake of nitric acid (HNO3) in Arctic cirrus ice
                      crystals was observed on 11 February 2003 by in-situ
                      instruments onboard the M55 Geophysica aircraft. The cirrus
                      cloud with a mean ice water content of 5.4 mg m(-3) covered
                      northern Scandinavia for several hours and extended up to
                      the thermal tropopause at 12.3 km. Within the cirrus region,
                      on average $9\%$ of the total HNO3 measured as reactive
                      nitrogen (NOy) is present in ice particles, increasing to
                      $19\%$ at temperatures below 205 K. In contrast to previous
                      studies, we discuss the HNO3 uptake in ice in terms of
                      HNO3/H2O molar ratios in ice crystals. The HNO3 content of
                      the ice increases with increasing gas phase HNO3
                      concentrations and decreasing temperatures. Enhanced uptake
                      of HNO3 in ice and heterogeneous chemistry on cold cirrus
                      clouds may disturb the upper tropospheric ozone budget.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Geosciences, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000236269100004},
      doi          = {10.1029/2005GL025159},
      url          = {https://juser.fz-juelich.de/record/48506},
}