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@ARTICLE{Yiit:890931,
      author       = {Yiğit, Erdal and Medvedev, Alexander S. and Ern, Manfred},
      title        = {{E}ffects of {L}atitude-{D}ependent {G}ravity {W}ave
                      {S}ource {V}ariations on the {M}iddle and {U}pper
                      {A}tmosphere},
      journal      = {Frontiers in astronomy and space sciences},
      volume       = {7},
      issn         = {2296-987X},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {FZJ-2021-01256},
      pages        = {614018},
      year         = {2021},
      abstract     = {Atmospheric gravity waves (GWs) are generated in the lower
                      atmosphere by various weather phenomena. They propagate
                      upward, carry energy and momentum to higher altitudes, and
                      appreciably influence the general circulation upon
                      depositing them in the middle and upper atmosphere. We use a
                      three-dimensional first-principle general circulation model
                      (GCM) with implemented nonlinear whole atmosphere GW
                      parameterization to study the global climatology of wave
                      activity and produced effects at altitudes up to the upper
                      thermosphere. The numerical experiments were guided by the
                      GW momentum fluxes and temperature variances as measured in
                      2010 by the SABER (Sounding of the Atmosphere using
                      Broadband Emission Radiometry) instrument onboard NASA’s
                      TIMED (Thermosphere Ionosphere Mesosphere Energetics
                      Dynamics) satellite. This includes the latitudinal
                      dependence and magnitude of GW activity in the lower
                      stratosphere for the boreal summer season. The modeling
                      results were compared to the SABER temperature and total
                      absolute momentum flux and Upper Atmosphere Research
                      Satellite (UARS) data in the mesosphere and lower
                      thermosphere. Simulations suggest that, in order to
                      reproduce the observed circulation and wave activity in the
                      middle atmosphere, GW fluxes that are smaller than observed
                      fluxes have to be used at the source level in the lower
                      atmosphere. This is because observations contain a broader
                      spectrum of GWs, while parameterizations capture only a
                      portion relevant to the middle and upper atmosphere
                      dynamics. Accounting for the latitudinal variations of the
                      source appreciably improves simulations},
      cin          = {IEK-7},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-7-20101013},
      pnm          = {211 - Die Atmosphäre im globalen Wandel (POF4-211)},
      pid          = {G:(DE-HGF)POF4-211},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000627581000001},
      doi          = {10.3389/fspas.2020.614018},
      url          = {https://juser.fz-juelich.de/record/890931},
}