Question

give reason pressure belt oscillate

Answer 1

All air movements have their roots in pressure differentials in the atmosphere, called pressure gradients. Systematic differences in the Earth's land temperature affect air pressure, and significant patterns of pressure that persist over time are called pressure belts, or wind belts. Wind belts depend on temperature, so temperature changes can move the belts and also change wind patterns.

Solar Heating

The heat from the sun is strongest at the equator, where solar rays are more intense. This means that the land and ocean surface near the equator tends to be warmer than elsewhere. Other factors lead to differences in surface temperature, such as the geography of the land, and oceans tend to be cooler and more stable in temperature than land. The end result is that there are large, systematic imbalances in surface temperatures on Earth in addition to smaller, local ones.

Pressure Gradients

Surface temperatures affect the temperature of the air above them. Because hotter air is less dense, it tends to rise, while the reverse is true for cool air -- it is more dense and tends to sink. Rising warm air creates low pressure, and sinking cool air creates high pressure. The difference in pressure between any two points in the atmosphere is called the pressure gradient. Because air moves from high pressure to low pressure, pressure gradients create wind by inducing rapid air movements to from high to low pressure.

Answer 2

All air movements have their roots in pressure differentials in the atmosphere, called pressuregradients. Wind belts depend on temperature, so temperature changes can move the belts and also change wind patterns.