Question

Write a short note on the distribution of air pressure in the atmosphere?

Answer 1

Since air has mass, it also has weight. Thepressure of air at a given place is defined as a force exerted in all directions by virtue of the weight of all the air above it. Since air pressure is proportional to density as well as temperature, it follows that a change in either temperature or density will cause a corresponding changein the pressure. The following equation called ‘the gas law’, describes the relationship between pressure, temperature and density—Pressure = Density x Temperature x ConstantAccording to the gas law, an increase in either density or temperature will cause an increase in pressure, provided the other variable (density or temperature) remains constant.

Answer 2

Answer:

Air pressure is defined as the pressure exerted by the weight of air on the earth’s surface. As we go up the layers of atmosphere, the pressure falls rapidly. The air pressure is highest at sea level and decreases with height. Horizontally the distribution of air pressure is influenced by temperature of air at a given place. In areas where temperature is high the air gets heated and rises. This creates a low-pressure area. Low pressure is associated with cloudy skies and wet weather.