Typical Appearance In Vertical Cross Sections
As Deformation Bands occur either in the vicinity of frontal clouds or outside frontal zones, the vertical cross sections, especially the isentropes, may vary substantially from case to case.
- Total deformation
Total deformation maximum at the level of maximum winds (jet stream level), on the pole ward side of the band. - Upper/middle tropospheric humidity
High upper and middle tropospheric relative humidity gradient at the axis of dilation. - Vertical motion
Weak or moderate sinking motion in middle and upper levels of the troposphere, within and towards the cold side of the Deformation Band.
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28 November 2004/06.00 UTC - Meteosat IR image; position of vertical cross section indicated
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Total deformation
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28 November 2004/06.00 UTC - Vertical cross section; black: isentropes (ThetaE), brown: total deformation
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Upper/middle tropospheric humidity
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28 November 2004/06.00 UTC - Vertical cross section; black: isentropes (ThetaE), blue: relative humidity
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Vertical Motion
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28 November 2004/06.00 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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