Exercises

The IR 10.8 μm satellite image below shows two frontal systems, one over the Atlantic and the other over central Europe. Both systems involve high wind speeds at 300 hPa (Click here for the NWP parameter "isotachs at 300 hPa").

Choose the right position

Find the three regions with transverse cloud bands by clicking on the image above. MSG IR 10.8 μm image from 2 January, 2016 at 12:00 UTC.

For a larger image click here

2. Choose the right answer

Shear gravity waves are also called:
a) Kelvin-Helmholtz waves
One prerequisite for the formation of shear gravity waves is that the wind profile shows: inflection points.
b) at least one
Transverse cloud bands are a sign for:
c) vertical oscillations of the air
Shear gravity waves can also form in the lower parts of the troposphere if: are present.
b) high vertical wind shear