Earth and Moon

Winds and rainfall

Winds and rainfall

If temperature, humidity and pressure are the elements that determine the weather, wind and precipitation are the most obvious (and perceptible) consequences.

Wind is the circulation of air from one place to another, with more or less force. Its main effect is to mix different layers or airbags.

When moisture is concentrated in an area and it rises to a layer of cooler air, precipitation occurs.

Winds and breezes

The wind is produced when a mass of air becomes less dense, as its temperature rises, it rises and then, another mass of more dense and cold air moves to occupy the space that the former has left.

There are general and permanent winds that run throughout the globe as a result of the general circulation of the atmosphere, and other winds that are triggered by local weather changes. Some of the latter are newspapers, others not; some affect large regions of the earth, others have a very limited scope of action.

The topographic conditions of the Earth cause that there are winds produced by small regional alterations. For example, land breezes, fresh air from the sea to land during the day, and sea breezes, fresh air that travels from land to sea at night.

Something similar occurs in mountain areas. During the day, the mountain breeze of the valley rises towards the summits, and the breeze of the valley, which descends from the summits at night.

Rain, snow, hail, storms

When the humidity of the air exceeds the saturation point, it condenses around small solid particles that float in the atmosphere and clouds form. Some of these clouds develop vertically. Inside, the currents cause the air to rise to cooler areas, while the drops increase in size since, as the temperature drops, the water in the gaseous state tends to become liquid.

If the drops of water or ice outweigh the forces that sustain them, they fall by the force of gravity and form what we call a "precipitation."

Depending on the temperature and the degree of condensation, water can precipitate in the form of liquid rain, but it can also be done in the form of ice crystals (snow) or dense masses of ice of different size (hail).

When the temperature differences between two air masses are very large, condensation occurs with great speed and abundance, there is intense rainfall, accompanied by sudden movements of the air and electrical exchange between the masses (lightning and lightning). This is what we call "storms" and, in some cases, they can get very violent.

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Weather: temperature, humidity, pressureClouds