why there is troposphere?

Answer 1

The Troposphere is the lowermost portion of Earth's atmosphere. It is the densest layer of the atmosphere and contains approximately 75% of the mass of the atmosphere and almost all the water vapor and aerosol.

The troposphere extends from the Earth's surface up to the tropopause where the stratosphere begins. The depth of the troposphere is greatest in the tropics (about 16km) and smallest at the poles (about 8km).

The word troposphere stems from the Greek "tropos" for "turning" or "mixing". The troposphere is the most turbulent part of the atmosphere and is the part of the atmosphere in which most weather phenomena are seen. Generally, jet aircraft fly just above the troposphere to avoid turbulence.

Answer 2

The Troposphere is the lowermost portion of Earth's atmosphere. It is the densest layer of the atmosphere and contains approximately 75% of the mass of the atmosphere and almost all the water vapor and aerosol.

The troposphere extends from the Earth's surface up to the tropopause where the stratosphere begins. The depth of the troposphere is greatest in the tropics (about 16km) and smallest at the poles (about 8km).

The word troposphere stems from the Greek "tropos" for "turning" or "mixing". The troposphere is the most turbulent part of the atmosphere and is the part of the atmosphere in which most weather phenomena are seen. Generally, jet aircraft fly just above the troposphere to avoid turbulence.

why there is troposphere

The basic structure of large scale circulation in the atmosphere remains fairly constant. There are three convection cells in each hemisphere: the Hadley cell, the Ferrel cell, and the Polar cell which guide the prevailing winds and transport heat from the equator to the poles.

Answer 3

This is a very good question. It comes down to static stability. A fluid is statically stable if it is heated from the top and unstable if it is heated from the top. An unstable fluid will tend to mix easily throughout because the fluid heated at the bottom will become less dense and rise, while cooler fluid above will sink. If it is warm at the top, the fluid tends to stay where it's at and mix very little.

In the troposphere, the fluid (air) is heated at the bottom when the ground absorbs incoming sunlight. Very little is absorbed in the rest of the troposphere, so not much heating happens there. Thus, the troposphere tends to be fairly unstable.

In the stratosphere, air is heated by ultraviolet radiation absorbed mainly by ozone. This causes the temperature to increase with height, so it is stable and not much mixing happens.

Thus, the troposphere is the area of the atmosphere between two heat sources, sunlight absorbed at the surface of the earth and ultraviolet radiation absorbed in the stratosphere. Here the temperature increases with height. Water vapor and dust can mix fairly rapidly. Thunderstorms can form. You get the idea.