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@ARTICLE{Ern:35907,
      author       = {Ern, M. and Preusse, P. and Alexander, M. J. and Warner, C.
                      D.},
      title        = {{A}bsolute values of gravity wave momentum flux derived
                      from satellite data},
      journal      = {Journal of Geophysical Research},
      volume       = {109},
      issn         = {0148-0227},
      address      = {Washington, DC},
      publisher    = {Union},
      reportid     = {PreJuSER-35907},
      pages        = {D20103},
      year         = {2004},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {[1] Temperature data obtained by the Cryogenic Infrared
                      Spectrometers and Telescopes for the Atmosphere (CRISTA) are
                      analyzed for gravity waves (GWs). Amplitude, phase and
                      vertical wavelength are determined from detrended
                      temperature height profiles. The retrieved phases are
                      utilized to estimate the horizontal wavelengths. At 25 km
                      altitude an equatorial maximum of horizontal wavelength with
                      a decrease toward mid and high latitudes is found.
                      Simultaneous estimates of both horizontal and vertical
                      wavelengths and temperature amplitudes allow the direct
                      calculation of GW momentum flux (MF) from satellite
                      observations for the first time. However, histograms of
                      horizontal wavelength distributions indicate severe
                      undersampling which prevents the retrieval of the
                      propagation directions of the waves, and suggests our MF
                      estimates may be too low, particularly at the high
                      latitudes. Therefore an empirical aliasing correction has
                      been applied. A world map of MF at 25 km altitude shows high
                      variability and pronounced source regions and deviates in
                      structure from a map of GW variances at the same altitude.
                      Results from the Warner and McIntyre GW parameterization
                      scheme (three-part model) show better agreement with CRISTA
                      MF estimates than with CRISTA squared GW amplitudes. Best
                      agreement is found for low model launch levels. Large error
                      ranges of the estimated MF values obtained in this paper
                      could be substantially reduced by improved horizontal
                      sampling in future satellite missions.},
      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    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000224876600011},
      doi          = {10.1029/2004JD004752},
      url          = {https://juser.fz-juelich.de/record/35907},
}