BACK-BENT OCCLUSION - TYPICAL APPEARANCE IN VERTICAL CROSS SECTIONS
by FMI
- Isentropes:
In the beginning the isentropes show the structure of an Occlusion. It turns into a structure of a Cold Front during the process. - Temperature advection:
In the beginning the vertical structure of temperature advection shows a distribution typical for an Occlusion. If the Back Bent Occlusion turns into a Cold Front, which is the most usual case, it can be seen in the change of the distribution of temperature advection.
The process in which a warm occluded front turns into a Cold Front can be seen from a sequence of cross sections:
A Warm Occlusion:
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17 June 2001/18.00 UTC - Vertical cross section; black: isentropes (ThetaE), red thick: temperature advection - WA, red thin:
temperature advection - CA, orange thin: IR pixel values, orange thick: WV pixel values
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A Cold Occlusion:
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18 June 2001/12.00 UTC - Vertical cross section; black: isentropes (ThetaE), red thick: temperature advection - WA, red thin:
temperature advection - CA, orange thin: IR pixel values, orange thick: WV pixel values
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A Cold Front:
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19 June 2001/06.00 UTC - Vertical cross section; black: isentropes (ThetaE), red thick: temperature advection - WA, red thin:
temperature advection - CA, orange thin: IR pixel values, orange thick: WV pixel values
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