Lower Stratospheric Fronts
- N. Hemisphere:
- North America
- Atlantic Ocean
- Europe
- Asia
- Pacific
- S. Hemisphere:
- South America
- Southern Africa/Indian Ocean
- South Pacific
South Pacific
Black: 200-hPa height in meters. Shaded: magnitude of the potential temperature gradient in K (100 km)-1
- Brown: Potential temperature.
- Thick black: 1.5 PVU surface.
- Dashed: magnitude of the wind speed in m s-1
- Shaded: Magnitdue of the potential temperature gradient in K (100 km)-1
- Brown: Potential temperature.
- Dashed: magnitude of the wind speed in m s-1
- Blue shading: Ascent. Omega every -2 x 10-3 hPa s-1
- Orange shading: Descent. Omega every 2 x 10-3 hPa s-1
- Blue contours: geostrophic cold air advection every -3 x 10-4 K s-1
- Red contours: geostrophic warm air advectioni every 3 x 10-4 K s-1