Isentropes can show much about the type of the front.
Some Questions:
- What structure do the isentropes show?
- Is it typical for an occlusion and if yes, why?
- If it is typical for an occlusion, for which type: a warmfront, a coldfront or a neutral occlusion?
- Are there any changes in the time period of the 12 hours?
Both parameters are connected. Therefore it makes sense to combine both superimposed on the isentropes.
Some Questions:
- Which structure does divergence show in respect to the isentropes?
- Is there any convergence and if yes, in which area of the isentropes?
- Up to which height?
- Which structure does omega show in respect to the isentropes and to the cloud tops?
- Where is upward motion compared to the cloud pixel?
Temperature advection especially in combination with frontal surfaces tells a lot about the character of the fronts.
Some Questions:
- If you superimpose temperature advection, which structure does this parameter show in respect to the isentropes?
- Where is warm and where is cold advection?
- Are the resulting patterns typical for an occlusion cloud band?
- If there cold advection on top of warm advection - does this give an important information and signal to the forecaster?
Positive vorticity advection maxima in upper levels are an important source for upward motion and tell in relation to the cloud systems much about the ongoing physical situations.
Some Questions:
- Are there PVA maxima in upper levels in the area of the cloud system?
- In which levels are these maxima?
- Where are the maxima in relation to the cloud band?
- Where are they in relation to the isentropes?
- Are there also maxima in low levels and if yes, what does this mean?
- Is this typical for an occlusion cloud band?
Potential vorticity tells much about tropospheric and stratospheric air masses and so about the downward protrusion of stratospheric air into the troposphere. Usually PV values > 2 units are characteristic for stratospheric air.
Some Questions:
- Where in the vertical cross section is typically stratospheric air?
- Values of PV > 2 units can be found down to which height?
- Does this change during the period of the 12 hours?
- Where is this lowest height in relation to the isentropes and the occlusion cloud system?
- There are relatively high values of about 1 unit within the troposphere
- Where can they be found in relation to the occlusion system?
- Which physical meaning do they have?