PBL Sensitivity Analyses

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PBL Sensitivity Analyses
February 8, 2006
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LAXMomSonoma Technology, Inc.

• Method N Angevine et al (1994)
• Height of the maximum value of range corrected
  SNR
• Method S Dye et all (1995)
• Median profile of the range-corrected SNR
• RASS stability method
• Tv profiles

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MM5 PBL Options

• 5. MRF PBL -
• Hong-Pan PBL, suitable for high-resolution
  in PBL (as for Blackadar scheme). Efficient
  scheme based on Troen-Mahrt representation of
  countergradient term and K profile in the well
  mixed PBL, as implemented in the NCEP MRF model.
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•  4. Eta PBL
• Mellor-Yamada scheme as used in the Eta model,
  Janjic (1990, MWR) and Janjic (1994, MWR). It
  predicts TKE and has local vertical mixing.  
• 6. Gayno-Seaman PBL -
• Mellor-Yamada TKE prediction. It is
  distinguished from others by the use of
  liquid-water potential temperature as a conserved
  variable, allowing the PBL to operate more
  accurately in saturated conditions (Ballard et
  al., 1991 Shafran et al. 2000).
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