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@ARTICLE{Lehmann:22109,
      author       = {Lehmann, C.I. and Kim, Y.-H. and Preusse, P. and Chun,
                      H.-Y. and Ern, M. and Kim, S.-Y.},
      title        = {{C}onsistency between {F}ourier transform and small-volume
                      few-wave decomposition for spectral and spatial variability
                      of gravity waves above a typhoon.},
      journal      = {Atmospheric measurement techniques},
      volume       = {5},
      issn         = {1867-1381},
      address      = {Katlenburg-Lindau},
      publisher    = {Copernicus},
      reportid     = {PreJuSER-22109},
      pages        = {1637 - 1651},
      year         = {2012},
      note         = {This work was funded by ESA under the grant "Observation of
                      Gravity Waves from Space", contract number: 22561/09/NL/AF.},
      abstract     = {Convective gravity wave (GW) sources are spatially
                      localized and emit at the same time waves with a wide
                      spectrum of phase speeds. Any wave analysis therefore
                      compromises between spectral and spatial resolution. Future
                      satellite borne limb imagers will for a first time provide
                      real 3-D volumes of observations. These volumes will be
                      however limited which will impose further constraints on the
                      analysis technique. In this study a three dimensional
                      few-wave approach fitting sinusoidal waves to limited 3-D
                      volumes is introduced. The method is applied to simulated
                      GWs above typhoon Ewiniar and GW momentum flux is estimated
                      from temperature fluctuations. Phase speed spectra as well
                      as average profiles of positive, negative and net momentum
                      fluxes are compared to momentum flux estimated by Fourier
                      transform as well as spatial averaging of wind fluctuations.
                      The results agree within $10-20\%.$ The few-wave method can
                      also reveal the spatial orientation of the GWs with respect
                      to the source. The relevance of the results for different
                      types of measurements as well as its applicability to model
                      data is discussed.},
      keywords     = {J (WoSType)},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {Atmosphäre und Klima},
      pid          = {G:(DE-Juel1)FUEK491},
      shelfmark    = {Meteorology $\&$ Atmospheric Sciences},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000306975500010},
      doi          = {10.5194/amt-5-1637-2012},
      url          = {https://juser.fz-juelich.de/record/22109},
}