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@ARTICLE{Spang:32642,
      author       = {Spang, R. and Remedios, J. J.},
      title        = {{O}bservations of a distinctive infra-red spectral feature
                      in the atmospheric spectra of polar stratospheric clouds
                      measured by the {CRISTA} instrument},
      journal      = {Geophysical research letters},
      volume       = {30},
      issn         = {0094-8276},
      address      = {Washington, DC},
      publisher    = {American Geophysical Union},
      reportid     = {PreJuSER-32642},
      pages        = {1875},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] Polar stratospheric cloud particles (PSCs) are known to
                      strongly influence the infra-red emission spectrum of the
                      lower stratosphere in cold polar winters. The
                      characteristics of these infra-red features have been
                      examined using limb sounding spectra recorded by the CRISTA
                      experiment in August 1997 when many Antarctic PSCs were
                      observed. A distinctive spectral feature centered at 820
                      cm(-1) has been identified in many of these spectra, the
                      first time that a particular band has been observed in the
                      spectra of PSCs in the atmosphere. The feature can be
                      attributed to the nu(2) band of the NO3- ion and strongly
                      suggests a condensed nitric acid component to the particles
                      in the form of solid nitric acid trihydrate (NAT) or liquid
                      ternary solution (STS). The spectral signatures belong to a
                      definite sub-set of the PSC observations recorded by CRISTA.
                      The particles are observed at temperatures well above 192 K,
                      allowing for temperature errors, and it is suggested that
                      NAT particles are the most likely source of the spectral
                      signature. In addition, it is shown that PSC events in which
                      no spectral signature is present are only observed below 192
                      K and display a very similar HNO3- temperature relationship
                      to STS particles.},
      keywords     = {J (WoSType)},
      cin          = {ICG-I},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB47},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre},
      pid          = {G:(DE-Juel1)FUEK257},
      shelfmark    = {Geosciences, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000185250700002},
      doi          = {10.1029/2003GL017231},
      url          = {https://juser.fz-juelich.de/record/32642},
}