Meaning of Atmosphere

What is Atmosphere:

The atmosphere either atmosphere is the gas layer stratified that surrounds, by the action of the force of gravity, the Earth, a celestial body or any other body. It is formed from two Greek words: ἀτμός (atmós), meaning ‘vapor’, ‘air’, and σφαῖρα (sfaira), ‘sphere’.

The earth’s atmosphere It is composed of a set of gases, among which nitrogen (78%) and oxygen (21%) stand out, with the remaining percentage (barely 1%) being shared by carbon dioxide, noble gases, steam of water and ozone.

The function of the atmosphere it is to be a protective shield against the hostility of outer space: it keeps temperatures within tolerable extremes, protects us from ultraviolet rays and meteorites, and contains nothing more and nothing less than the indispensable oxygen. In short, the atmosphere creates favorable conditions for life on Earth.

The term is also often used to refer to a certain Social situation: “My boyfriend created a romantic atmosphere to ask me to marry”, or: “In the country reigns a atmosphere of violence”. For example, in Cuba it is said that an atmosphere has been “formed” when an unpleasant situation has been created.

In the field of Physical, the atmosphere is one unit of measurement which is equivalent to the pressure or tension exerted by the atmosphere at sea level. Its value is equal to the pressure of a column of mercury 760 mm high.

In Literatureatmosphere can also refer to the narrative procedures that a writer applies to generate a certain perception about the environment where a story takes place. story. a master of narrative atmospheres is the American short story writer Raymond Carver.

layers of the atmosphere

We can subdivide the earth’s atmosphere in different layers, taking into account their particular characterisitics.

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First of all, we find the troposphere, which is where we all live and, therefore, the closest to our planet. The highest density of gases is located in this layer, and meteorological phenomena, such as rain and clouds, take place in it. Its height varies between 11 and 18 km.

The stratosphere, for its part, reaches about 50 km in height. There we find the ozone layer or ozonospherewhose function is to protect us from the ultraviolet radiation of the Sun.

Then, at a height of approximately 80 km, we come across the mesosphere. In this area, the temperature can drop as altitude increases, down to -90 °C.

For its part, the thermosphere or ionosphere reaches up to 500 km high. This is where meteorites disintegrate. In addition, it is an excellent conductor of electricity, which facilitates the transmission of radio and television waves. Its temperatures can range from -70 °C to 1,500 °C.

Finally, the exosphere It starts from 500 km high and above. It is the area farthest from Earth and, therefore, where we find the least concentration of gases. It is our border with outer space.