Experimental "Fourier-Ray" Mountain Wave Forecasts
Jun Ma: Computational Physics, Inc., Springfield, VA
Stephen Eckermann: Code 7646, Naval Research Laboratory, Washington, DC

  
   During MidCiX, Code 7646 at NRL is issuing a series of tests forecasts using our entirely new Fourier-ray method to assess its suitability (longer term) as a next-generation dynamical core for the Mountain Wave Forecast Model (MWFM).  For more information and background, consult the references listed below.
   The forecasts, provided for nominal Colorado and New Mexico geographical domains (as shown opposite right), are being  issued here sporadically as purely experimental products. Our goal here is to compare the output from early versions of the Fourier-ray code during MidCiX with more operational forecast products provided by the MWFM and 3DLOM. While mission scientists are welcome to peruse these forecasts, please note that all the forecasts on this page are 100% experimental, and as such should not be used as a basis for any kind of mission planning.

REFERENCES:
Broutman, D., J. W. Rottman and S. D. Eckermann, A hybrid method for analyzing wave propagation from a localized source, with application to mountain waves, Q. J. R. Meteorol. Soc., 127, 129-146, 2001.
Broutman, D., J. W. Rottman and S. D. Eckermann, Maslov's method for stationary hydrostatic mountain waves, Q. J. R. Meteorol. Soc., 128, 1159-1172, 2002.
Broutman, D., J. W. Rottman and S. D. Eckermann, A simplified Fourier method for nonhydrostatic mountain waves, J. Atmos. Sci., 60, 2686–2696, 2003.
Broutman, D., J. W. Rottman and S. D. Eckermann, Ray methods for internal waves in the atmosphere and ocean, Ann. Rev. Fluid Mech., 36, 233-253, 2004.

Latest Test Fourier-Ray Forecasts
 Initialized 6_May_2004 0:00Z

COLORADO

Fourier-Ray Runs

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 0/12 Hour 24/36 Hour 48/60 Hour 72/84 Hour

NEW MEXICO

Fourier-Ray Runs

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 0/12 Hour 24/36 Hour 48/60 Hour 72/84 Hour

Comparison MWFM-2 Forecasts

 

 0/12 Hour 24/36 Hour 48/60 Hour 72/84 Hour

MWFM-2 250 hPa Temperature Amplitudes using NCEP GFS

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MWFM-2 250 hPa Temperature Amplitudes using NCEP ETA

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MWFM-2 250 hPa Temperature Amplitudes using NOGAPS

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