Vertical Cross Sections
Vertical cross sections are important tools as they allow a view into the vertical extension of synoptic and mesoscale systems. In this chapter several aspects of interest of the prefrontal convergence are discussed:- The isentropes that give an idea of the (un)stable stratification of the troposphere
- The upward motions associated to the convection
- The regions of divergence and convergence and at what levels of the troposphere these are found
Vertical Cross Sections of the prefrontal convection
In the next chapter in several timesteps the vertical cross sections are discussed.
|
30th July 2005: 06UTC |
|
30th July 2005: 12UTC |
|
30th July 2005: 18UTC |
|
31st July 2005: 00UTC |
Summary of the investigations in this chapter
The timeseries of the VCS shows that already at an early stage the prefrontal region is characterised by an unstable stratification. This induces convergence near the surface and the rising motions are also well reflected in this analyses. With the region governed by warm air advection, adding some slight contribution to the positive omega. The cold front is under cold air advection providing a strong contrast.