Arctic Cold Front - Typical Appearance in Vertical Cross Sections
by FMI
- Isentropes
- A shallow frontal zone in the lower troposphere
- The tropopause often unclear
- Temperature advection
Cold advection within and behind the frontal zone - Divergence
Convergence within the frontal zone and divergence above it - Vertical Motion (Omega)
Ascending motion ahead of the frontal zone and descending motion behind it
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23 March 2009/11.29 UTC NOAA 18 VIS 0.6+ VIS 0.9+IR 10.9 RGB image; position of vertical cross section indicated
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Temperature advection
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23 March 2009/12 UTC - Vertical cross section; black: isentropes (ThetaE), red thick: temperature advection - WA, red thin: temperature
advection - CA
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Divergence
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23 March 2009/12 UTC - Vertical cross section; black: isentropes (ThetaE), magenta thick: convergence, magenta thin: divergence
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Vertical Motion (Omega)
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23 March 2009/12 UTC - Vertical cross section; black: isentropes (ThetaE), cyan thick: vertical motion (omega) - upward motion, cyan thin:
vertical motion (omega) - downward motion
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