More examples for the three classes
A case for class 1
7 February 2020, 06 UTC;
u.l.: 300-hpa height contours and VCS (vertical cross section) line; u.r.: TFP (thermal front parameter); l.l.: Contours of CVA (cyclonic vorticity advection) 300-hPa; l.r.: Contours of height at which PV = 2 units
7 February 2020, 06 UTC;
Fronts, trough lines, convection lines, High and Low centres;
The blue line in the eastern Mediterranean indicates an upper-level trough line connected to the comma. The main polar front is located far to the west over the Atlantic
7 February 2020, 06 UTC:
horizontal cross-sections, class 1
l.: isentropes and PV > 1 unit; r: isentropes and vorticity advection: anticyclones in blue and cyclones in red
A case for class 2
22 February 2020, 15 UTC;
u.l.: 300-hpa height contours and VCS (vertical cross section) line; u.r.: TFP (thermal front parameter); l.l.: Contours of CVA (cyclonic vorticity advection) 300-hPa; l.r.: Contours of height at which PV = 2 units
22 February 2020, 15 UTC;
Fronts, trough lines, convection lines, H and L centers;
The blue line south of the Peloponnese indicates a trough line connected to the comma.
The main Polarfront is analysed over the Atlantic extending to West- and North Europe.
22 February 2020/ 15 UTC:
vertical cross sections, Class 2
u.l.: isentropes and PV > 1 unit; u. r: isentropes and vorticity advection: anticyclones in blue and cyclones in red
l.l: omega: upward motion in red and downward motion in blue.
Two cases from class 3
15 August 2020, 12 UTC
u.l.: 300-hpa height contours and VCS (vertical cross section) line; u.r.: TFP (thermal front parameter); l.l.: Contours of CVA (cyclonic vorticity advection) 300-hPa; l.r.: Contours of height at which PV = 2 units
15 August 2020, 12 UTC;
l.: Airmass RGB
r.: Fronts, trough lines, convection lines, H and L centers;
15 August 2020, 12 UTC: vertical cross
sections, Class 3
u.l.: isentropes and PV > 1 unit; u. r: isentropes and vorticity advection: anticyclones in blue and cyclones in red
l.l: omega: upward motion in red and downward motion in blue.
Second class 3 case
22 July 2020, 12 UTC
u.l.: 300-hpa height contours and VCS (vertical cross section) line; u.r.: TFP (thermal front parameter); l.l.: Contours of CVA (cyclonic vorticity advection) 300-hPa; l.r.: Contours of height at which PV = 2 units
22 July 2020, 12 UTC;
l.: Airmass RGB
r.: Fronts, trough lines, convection lines, H and L centers;
22 July 2020, 12 UTC: vertical cross sections,
Class 3
u.l.: isentropes and PV > 1 unit; u. r: isentropes and vorticity advection: anticyclones in blue and cyclones in red
l.l: omega: upward motion in red and downward motion in blue.