PPL » Meteorology » Weather Maps
8.4 Weather Maps
8.4.2 Identify the following features found on surface weather maps:
Isobars are lines on a weather map, connecting points of equal atmospheric pressure.
(b) anticyclone (“high”);
An anticyclone is an anticlockwise circulation of winds around a central region of high atmospheric pressure, in the Southern Hemisphere.
(c) depression (“low” or “cyclone”);
A depression is a clockwise circulation of winds around a central region of low atmospheric pressure, in the Southern Hemisphere.
(d) ridge of high pressure;
A ridge is an extension of a high.
(e) trough of low pressure;
A trough is an extension of a low.
A col is the area between two highs and two lows where hardly any pressure gradient exists.