Troposphere is the lowest layer of the atmosphere in which 75 per cent of the total weight of the atmosphere is centered. The average height of this layer is 13 km. Its height is 18 km on the equator and 8 – 10 km. on the poles. This is the most important layer of the atmosphere. Because all weather phenomena in this sphere.
In this layer, the temperature decreases along with the increase in height from the surface. This decrease in temperature is at the rate of 6.4°C per 1000 meters. This fall in temperature with height is known as normal lapse rate. This layer contains plenty of dust particles and water vapor. Clouds are formed due to this.
Rainfall and other climate and weather related events occur due to this. This layer is a subject of deep study of meteorologists. The upper boundary of this sphere is called the tropopause. Its thickness is only 1.5 km. Above this boundary, there is atmospheric stability. It is also called the roof of seasonal changes.
