Mass (geopotential) and wind wind error covariances

• Pure geostrophic coupling: F = f0Y

  • Rotational component of wind error variance is directly related to the geopotential

• Partial geostrophic coupling: F = f0Y +F’

  
  
  • áY F’ ñ = 0

• Definition of the analysis variables:

  Y, c et F’: áY F’ ñ = ác F’ ñ = áY c ñ = 0
  

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