Dynamical conceptual models of upper-level mobile trough formation: comparison and application Academic Article uri icon

abstract

  • A variety of theories have been proposed to explain the genesis and intensification of mobile troughs. For purposes of intercomparison and qualitative application to observed cases, these theories are described in terms of the generation of waves along the tropopause potential vorticity discontinuity. These models are then tested on a case of mobile trough formation which occurred on 19-20 April 1991 and which was poorly forecasted by operational models. A vorticity maximum within the newly-formed trough was amplified and advected southeastward by the developing larger-scale ridge/trough system and later participated in a surface cyclogenesis event. -from Author

published proceedings

  • Tellus, Series A

author list (cited authors)

  • Nielsen-Gammon, J. W.

complete list of authors

  • Nielsen-Gammon, JW

publication date

  • January 1995