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Gravity Wave

Discussion in 'Systems & Severe' started by snowbarbie, Jul 26, 2020.

  1. snowbarbie

    snowbarbie Hard Yards

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    Evidence of gravity waves off the spine of the Antarctic peninsula ? - one of the SH "hotspots" for these waves. Gravity waves(& their effects) are not well represented in models, and may represent a source of error in StratosphericPolarVortex forecasts - which in turn, for example, could be reflecting in surface sam forecasts.

    The large air parcel which breaks from the filament of pv, looks to me to possibly contain tropospheric air - the colour bar code at bottom of image places it near or below the pv threshold for the dynamic tropopause (1.5-2 pvu).

    The images are @ ~ 47hpa (600K isentropic surface).

    [​IMG]
    [​IMG]
    [​IMG]
     
  2. POW_hungry

    POW_hungry Old n' Crusty Moderator Ski Pass: Gold

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    Looking at the current (0 hr) Long Cross-section, it puts it between two regions of Eddy Heat Flux:
    [​IMG]

    Long Range indicators show some decoupling circa mid-August, so it sounds like we're seeing the start of PV wobble.