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@ARTICLE{Ern:6488,
      author       = {Ern, M. and Preusse, P.},
      title        = {{Q}uantification of the contribution of equatorial {K}elvin
                      waves to the {QBO} wind reversal in the stratosphere},
      journal      = {Geophysical research letters},
      volume       = {36},
      issn         = {0094-8276},
      address      = {Washington, DC},
      publisher    = {American Geophysical Union},
      reportid     = {PreJuSER-6488},
      pages        = {L21801},
      year         = {2009},
      note         = {The work of M. Ern was supported by the European Commission
                      (European Union's 6th framework program) within the EC
                      Integrated Project SCOUT-O3 (505390-GOCE-CT-2004). We thank
                      the whole SABER team, in particular M. G. Mlynczak, J. M.
                      Russell III, and L. L. Gordley, for providing the excellent
                      data set of SABER temperatures. Thanks also go to the
                      European Centre for Medium-Range Weather Forecasts (ECMWF)
                      for providing the ECMWF operational analyses used. Helpful
                      comments by two anonymous reviewers are gratefully
                      acknowledged.},
      abstract     = {Both global scale waves (e. g., Kelvin, equatorial Rossby,
                      or Rossby-gravity waves) and mesoscale gravity waves
                      contribute to the wind reversals of the quasi biennial
                      oscillation (QBO). The relative contributions of the
                      different wave types are highly uncertain. In our work we
                      quantify the contribution of equatorial Kelvin waves to the
                      reversal from stratospheric easterlies to westerlies
                      averaged over two QBO cycles in the period 2002-2006. Our
                      analysis is based on longitude-time spectra of temperatures
                      measured by the SABER satellite instrument, as well as
                      temperatures from ECMWF operational analyses. Kelvin waves
                      of zonal wavenumber 1-6 and periods longer than 2.5 days are
                      covered. It is found that the contribution of Kelvin waves
                      is about $30-50\%$ of the observed wind reversal and only
                      $20-35\%$ of the expected total wave forcing. The larger
                      part of the wave forcing therefore has to be contributed by
                      other waves, likely mesoscale gravity waves. Citation: Ern,
                      M., and P. Preusse (2009), Quantification of the
                      contribution of equatorial Kelvin waves to the QBO wind
                      reversal in the stratosphere, Geophys. Res. Lett., 36,
                      L21801, doi: 10.1029/2009GL040493.},
      keywords     = {J (WoSType)},
      cin          = {ICG-1},
      ddc          = {550},
      cid          = {I:(DE-Juel1)VDB790},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK406},
      shelfmark    = {Geosciences, Multidisciplinary},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000271579300002},
      doi          = {10.1029/2009GL040493},
      url          = {https://juser.fz-juelich.de/record/6488},
}