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@ARTICLE{Krisch:885521,
      author       = {Krisch, Isabell and Ern, Manfred and Hoffmann, Lars and
                      Preusse, Peter and Strube, Cornelia and Ungermann, Jörn and
                      Woiwode, Wolfgang and Riese, Martin},
      title        = {{S}uperposition of gravity waves with different propagation
                      characteristics observed by airborne and space-borne
                      infrared sounders},
      journal      = {Atmospheric chemistry and physics},
      volume       = {20},
      number       = {19},
      issn         = {1680-7324},
      address      = {Katlenburg-Lindau},
      publisher    = {EGU},
      reportid     = {FZJ-2020-03901},
      pages        = {11469 - 11490},
      year         = {2020},
      abstract     = {Many gravity wave analyses, based on either observations or
                      model simulations, assume the presence of only a single
                      dominant wave. This paper shows that there are much more
                      complex cases with gravity waves from multiple sources
                      crossing each others' paths. A complex gravity wave
                      structure consisting of a superposition of multiple wave
                      packets was observed above southern Scandinavia on 28
                      January 2016 with the Gimballed Limb Observer for Radiance
                      Imaging of the Atmosphere (GLORIA). The tomographic
                      measurement capability of GLORIA enabled a detailed 3-D
                      reconstruction of the gravity wave field and the
                      identification of multiple wave packets with different
                      horizontal and vertical scales. The larger-scale gravity
                      waves with horizontal wavelengths of around 400 km could
                      be characterised using a 3-D wave-decomposition method. The
                      smaller-scale wave components with horizontal wavelengths
                      below 200 km were discussed by visual inspection. For the
                      larger-scale gravity wave components, a combination of
                      gravity-wave ray-tracing calculations and ERA5 reanalysis
                      fields identified orography as well as a jet-exit region and
                      a low-pressure system as possible sources. All gravity waves
                      are found to propagate upward into the middle stratosphere,
                      but only the orographic waves stay directly above their
                      source. The comparison with ERA5 also shows that ray tracing
                      provides reasonable results even for such complex cases with
                      multiple overlapping wave packets. Despite their coarser
                      vertical resolution compared to GLORIA measurements,
                      co-located AIRS measurements in the middle stratosphere are
                      in good agreement with the ray tracing and ERA5 results,
                      proving once more the validity of simple ray-tracing models.
                      Thus, this paper demonstrates that the high-resolution
                      GLORIA observations in combination with simple ray-tracing
                      calculations can provide an important source of information
                      for enhancing our understanding of gravity wave
                      propagation.},
      cin          = {IEK-7 / JSC},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013 / I:(DE-Juel1)JSC-20090406},
      pnm          = {244 - Composition and dynamics of the upper troposphere and
                      middle atmosphere (POF3-244) / 511 - Computational Science
                      and Mathematical Methods (POF3-511)},
      pid          = {G:(DE-HGF)POF3-244 / G:(DE-HGF)POF3-511},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000578985500001},
      doi          = {10.5194/acp-20-11469-2020},
      url          = {https://juser.fz-juelich.de/record/885521},
}