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@ARTICLE{delaTorre:917457,
      author       = {de la Torre, A. and Alexander, P. and Marcos, Tomas and
                      Hierro, R. and Llamedo, P. and Hormaechea, J. L. and
                      Preusse, P. and Geldenhuys, M. and Krasauskas, L. and Giez,
                      A. and Kaifler, B. and Kaifler, N. and Rapp, M.},
      title        = {{A} {S}pectral {R}otary {A}nalysis of {G}ravity {W}aves:
                      {A}n {A}pplication {D}uring {O}ne of the {SOUTHTRAC}
                      {F}lights},
      journal      = {JGR / Atmospheres},
      volume       = {128},
      number       = {1},
      issn         = {0148-0227},
      address      = {Hoboken, NJ},
      publisher    = {Wiley},
      reportid     = {FZJ-2023-00670},
      pages        = {e2022JD037139},
      year         = {2023},
      abstract     = {To understand the main orographic and non-orographic
                      sources of gravity waves (GWs) over South America during an
                      Experiment (Rapp et al., 2021,
                      https://doi.org/10.1175/BAMS-D-20-0034.1), we propose the
                      application of a rotational spectral analysis based on
                      methods originally developed for oceanographic studies. This
                      approach is deployed in a complex scenario of
                      large-amplitude GWs by applying it to reanalysis data. We
                      divide the atmospheric region of interest into two height
                      intervals. The simulations are compared with lidar
                      measurements during one of the flights. From the degree of
                      polarization and the total energy of the GWs, the
                      contribution of the upward and downward wave packets is
                      described as a function of their vertical wavenumbers. At
                      low levels, a larger downward energy flux is observed in a
                      few significant harmonics, suggesting inertial GWs radiated
                      at polar night jet levels, and below, near to a cold front.
                      In contrast, the upward GW energy flux, per unit area, is
                      larger than the downward flux, as expected over mountainous
                      areas. The main sub-regions of upward GW energy flux are
                      located above Patagonia, the Antarctic Peninsula and only
                      some oceanic sectors. Above the sea, there are alternating
                      sub-regions dominated by linearly polarized GWs and sectors
                      of downward GWs. At the upper levels, the total available GW
                      energy per unit mass is higher than at the lower levels.
                      Regions with different degrees of polarization are
                      distributed in elongated bands. A satisfactory comparison is
                      made with an analysis based on the phase difference between
                      temperature and vertical wind disturbances.},
      cin          = {IEK-7},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {2112 - Climate Feedbacks (POF4-211) / 2A3 - Remote Sensing
                      (CARF - CCA) (POF4-2A3)},
      pid          = {G:(DE-HGF)POF4-2112 / G:(DE-HGF)POF4-2A3},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000998847300001},
      doi          = {10.1029/2022JD037139},
      url          = {https://juser.fz-juelich.de/record/917457},
}