Lower Tropospheric Eddy Momentum Fluxes in Idealized Models and Reanalysis Data

Details

• Journal Title:
  Journal of the Atmospheric Sciences
• Personal Author:
  Lutsko, Nicholas J. ; Held, Isaac M. ; Zurita-Gotor, Pablo ; O’Rourke, Amanda K.
• NOAA Program & Office:
  OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory) ; CICSP (Cooperative Institute for Climate Science)
• Description:
  In Earth’s atmosphere eddy momentum fluxes (EMFs) are largest in the upper troposphere, but EMFs in the lower troposphere, although modest in amplitude, have an intriguing structure. To document this structure, the EMFs in the lower tropospheres of a two-layer quasigeostrophic model, a primitive equation model, and the Southern Hemisphere of a reanalysis dataset are investigated. The lower-tropospheric EMFs are very similar in the cores of the jets in both models and the reanalysis data, with EMF divergence (opposing the upper-tropospheric convergence) due to relatively long waves with slow eastward phase speeds and EMF divergence (as in the upper troposphere) due to shorter waves with faster eastward phase speeds.
• Keywords:
  Angular Momentum Dynamics Eddies Fluxes Jets Waves, Atmospheric
• Source:
  Journal of the Atmospheric Sciences, 74(11)
• DOI:
  https://doi.org/10.1175/JAS-D-17-0099.1
• Document Type:
  Journal Article
• Rights Information:
  Other
• Compliance:
  Submitted
• Main Document Checksum:
  urn:sha256:f345ad09f32f5288603c99a4fdf05670ea341b09fb07166bafe5ca24e0a2cda2
• Download URL:
  https://repository.library.noaa.gov/view/noaa/32292/noaa_32292_DS1.pdf
• File Type:
  [PDF - 2.16 MB ]