Question

As one moves away from equatorial regions,the annual rainfall decreases . Explain fast pls ​

Answer 1

Answer:

Equatorial Waves

In the equatorial region there is a special class of weather-producing waves that combine some of the characteristics of gravity waves and of Rossby waves. Equatorial waves are trapped in latitude, that is, they propagate along the Equator with amplitudes decreasing with latitude. In some circumstances they may also propagate energy and momentum vertically. Two important examples of equatorial waves are the equatorial Kelvin wave and the Rossby-gravity wave. The Kelvin wave has pressure and zonal velocity perturbations symmetric about the Equator, and negligible meridional velocity component. It propagates eastwards, with vertical structure identical to the eastward-propagating buoyancy wave shown in Figure 4, and is an important source of eastward momentum for the equatorial stratosphere.

Rossby-gravity waves are waves that combine characteristics of Rossby waves and gravity waves. They have meridional wind distributions symmetric about the Equator and zonal wind and pressure distributions antisymmetric about the Equator. Away from the Equator the wind and pressure distributions in the Rossby-gravity wave are nearly geostrophic, but near the Equator there are strong departures from geostrophic balance. Rossby-gravity waves propagate westwards relative to the mean flow. They are associated with equatorial weather disturbances, and are also a significant source of westward momentum for the equatorial stratosphere.

Explanation:

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