Wind: what it is, types, when it is strong, how it is measured and examples

Wind is the movement of air in the atmosphere, and is produced mainly by differences in temperature and pressure between different areas of the Earth. When the Sun heats the Earth’s surface, it does not do so uniformly; some areas become hotter than others. Hot air, being lighter, tends to rise, while cold air, denser, descends to take its place. This movement of air masses is what we perceive as wind.

There are several types of wind, and they can be classified according to their duration, direction, origin or area where they blow. Let’s see which are the main ones:

• Constant or planetary winds: they are those that always blow in the same direction and with little variation throughout the year. They are due to the rotation of the Earth and the distribution of pressure on the planet. Among them, the trade winds stand out, which blow from the subtropics towards the equator, and the westerly winds, which predominate in the middle latitudes.
• Periodic winds: they change direction depending on the time of year or time of day. A clear example is the monsoons, typical of South Asia, which in summer bring humid air from the ocean towards the continent, causing intense rains, and in winter they blow in the opposite direction, with dry air towards the sea.
• Local winds: they are typical of specific regions and are due to characteristics of the relief or specific climatic conditions. Some examples are the foehn in the Alps, the siroco in the Mediterranean or the zonda in Argentina.
• Variable or irregular winds: they do not have a fixed direction or force. They are caused by atmospheric disturbances, such as storms or cyclones, and their behavior can change suddenly.

To identify the direction of these winds and orient yourself in navigation or weather, the compass rose is used, a diagram that indicates the cardinal points and the predominant winds in a region.

The strength of the wind is measured by the speed with which the air moves. The higher that speed is, the stronger we perceive it. In meteorology, it is considered a strong wind when its speed exceeds 40 kilometers per hour, although the sensation may vary depending on the environment.

To measure the intensity of the wind, the Beaufort scale is used, which ranges from 0 (complete calm) to 12 (hurricane). According to this scale, a strong wind is usually between levels 6 and 7, which is equivalent to gusts capable of moving thick tree branches, raising dust or making it difficult for people to pass.

In this article you will find more information about When is considered strong wind.

Wind is measured mainly in two aspects: its speed and its direction. To do this, meteorology uses specific instruments that allow obtaining precise and constant data.

The best known is the anemometer, which is used to measure wind speed. There are several types. The most common are those with cups, which have three or four small cups that rotate when pushed through the air; The faster they spin, the higher the recorded speed. There are also propeller anemometers, similar to a small fan, and ultrasonic anemometers, which calculate wind speed using sound waves, without moving parts, making them more precise and resistant. Discover more about the Anemometer: what it is, what it is for and how it works.

To know the direction of the wind, the weather vane is used, an arrow-shaped instrument that rotates on an axis until it is aligned with the wind. The tip points in the direction from which the air comes.

The wind has a great influence on both the environment and daily life.

• In nature: wind helps regulate air temperature, disperse seeds and pollen, and transport moisture from the oceans to the interior of continents, contributing to the formation of clouds and rain. It also influences soil and rock erosion, especially in arid or coastal areas, where it can shape entire landscapes over time.
• In daily life: wind influences aspects as diverse as thermal sensation, maritime and air navigation, and wind energy production.

However, wind can also have negative effects when it blows too hard. It can cause trees to fall, affect crops, disrupt transportation or cause damage to homes and infrastructure.

In different parts of the world there are characteristic winds that receive their own names according to their origin, direction or effects on the climate. Let’s look at some of the best-known examples:

• Trade winds: they are constant winds that blow from the subtropics towards the equator. They are warm and humid, and play a key role in tropical climate and the formation of hurricanes. Discover more about the Trade Winds: what they are and how they are formed.
• Mistral: blows in the south of France, especially in the Rhône Valley.
• Sirocco: originates in the Sahara desert and blows towards the Mediterranean Sea. It is a warm, dust-laden wind that can raise temperatures in countries such as Italy, Greece or Spain.
• Zonda: native to Argentina, descends from the Andes mountain range. It is a dry and very warm wind that can sharply raise the temperature in a few hours.
• Foehn: occurs in mountainous regions, such as the Alps or the Andes. It is a warm, dry wind that appears when humid air rises up a slope, cools and discharges its moisture, and then descends the other side, warming quickly.
• Monsoon: is a seasonal wind that changes direction depending on the time of year. In summer it carries humid air from the ocean towards the continent (causing intense rain), and in winter it blows in the opposite direction, with dry air. It is characteristic of South Asia.
• Pampero: blows in the southern plains of South America, especially in Argentina, Uruguay and part of Brazil.

You may be interested in knowing the Types of winds in Spain.

The strongest wind in the world officially recorded was measured on April 10, 1996 on Barrow Island, Australia, during the passage of Cyclone Olivia. At that time, a gust reached 407 kilometers per hour, a speed comparable to that of a high-speed train or even a category 5 hurricane. This mark was recognized by the World Meteorological Organization as the absolute record for the most intense wind ever recorded on the earth’s surface.

Studying the wind is essential because it influences almost all aspects of the planet: climate, ecosystems, navigation, agriculture, aviation and even energy generation. Understanding how it behaves and what causes it allows us to anticipate natural phenomena, take advantage of their benefits and reduce their risks.

In addition, the wind influences natural ecosystems. It transports seeds, disperses pollen, regulates temperature and distributes humidity in the atmosphere. Its study allows us to better understand environmental balances and the processes of desertification or soil erosion.

If you want to read more articles similar to Wind: what it is, types, when it is strong, how it is measured and examples, we recommend that you enter our Meteorological Phenomena category.