Before revision: Equatorial Rossby waves, often called planetary waves, are very long, low frequency waves found near the equator and are derived using the equatorial Beta plane approximation, , where " β " is the variation of the Coriolis parameter with latitude, .
After revision: Equatorial Rossby waves, often called planetary waves, are very long, low frequency waves found near the equator and are derived using the equatorial beta plane approximation, , where β is the variation of the Coriolis parameter with latitude, .