Meteorology

Meteorology is the scientific study of the Earth's atmosphere and short-term weather. It helps us understand everyday weather like clouds, precipitation, and wind, as well as big storms such as tropical cyclones and winter storms. This knowledge is important for many areas, including the military, aviation, energy production, transport, agriculture, construction, weather warnings, and disaster management.

Meteorologists use tools like thermometers, barometers, and weather vanes, along with technology such as weather satellites, balloons, reconnaissance aircraft, buoys, and radars, to collect data and make forecasts. The World Meteorological Organization helps make sure weather research and forecasting are done in a standard way around the world.

The study of meteorology goes back thousands of years. Ancient people tried to predict weather using folklore, astrology, and religious rituals. Over time, better tools and science improved our understanding. Today, meteorology uses computers, big data, and supercomputing to create accurate forecasts, even though the atmosphere can be hard to predict.

Etymology

The word meteorology comes from ancient Greek. It is made from two words: metéōros, meaning "things in the sky," and -logia, meaning "the study of." So, meteorology is the study of weather and the air around us.

History

Ancient meteorology up to the time of Aristotle

Early people tried to predict the weather by linking it to gods and ancient religions. They learned to guess when rain and floods would happen by watching yearly cycles, even before they started farming. Priests used astrology to guess about the weather.

Ancient India talked about clouds and seasons, and a book from around 500 AD wrote down weather observations. Babylonian tablets connected thunder and rain, and the Chaldeans watched weather patterns.

The ancient Greeks were the first to make theories about weather. Without tools, they learned by watching and thinking. One Greek, Thales, guessed a solar eclipse in 585 BC and studied the Nile’s flooding. Others said thunder and lightning happened when air moved in clouds. Anaxagoras said hail formed when cold air froze water in clouds.

Aristotelian meteorology

These early ideas helped form Aristotle’s work on weather, written in 350 BC. Aristotle is called the founder of meteorology. His book described the water cycle, which we still learn about today. His ideas were important for almost 2,000 years.

After Aristotle, progress went slower. Theophrastus wrote about weather signs and guesses, using seasons and moon phases to predict changes. His work stayed well-known for many years.

Meteorology after Aristotle

Meteorology kept growing over time. During the Renaissance, scientists like Galileo and Descartes shared new ideas, starting a scientific revolution in weather studies.

In the 1700s, new tools like thermometers and barometers helped scientists measure temperature and air pressure better. The first weather society started in 1780.

The 1800s brought new ways to track storms, like the telegraph, which helped create weather networks. Scientists began using math to guess the weather.

In the 1900s, radar and satellites made it much easier to watch and follow weather. Today, computers help make weather guesses more correct. Meteorology also looks at air quality and climate changes.

Meteorologists

Further information: Meteorologist

Meteorologists are scientists who study the weather. They work in many places, such as government agencies, private companies, research centers, factories, radio stations, television stations, and schools.

Many people see weather forecasts on TV or radio. The people who present this weather news are not always professional meteorologists. Often, these weather presenters are reporters without special training in meteorology. Some groups, like the American Meteorological Society and the National Weather Association, give special approval to weather presenters who meet certain standards.

Equipment

Main article: Meteorological instrumentation

Meteorology uses special tools to study the weather. Rain, wind, and humidity are some of the first things people measured. Tools like the rain gauge, anemometer, and hygrometer were developed in the mid-1400s to measure these.

Weather stations, ships, and buoys collect many types of weather data. They often measure temperature, pressure, wind, and humidity using tools like thermometers, barometers, anemometers, and hygrometers. Some stations also have sensors for air quality, cloud height, rain or snow, lightning, and more. To get data from higher up in the atmosphere, scientists launch radiosondes. They also use radar, Lidar, and satellites to collect information from far away.

Spatial scales

The study of the atmosphere can be divided into different areas based on time and distance. On short timescales, like hours or days, meteorology looks at three main scales: microscale, mesoscale, and synoptic scale. Each scale relates to different sizes and times of weather events.

Microscale meteorology studies weather on a very small scale, about 1 kilometre or less. This includes individual thunderstorms, clouds, and turbulence caused by buildings or hills. Mesoscale meteorology looks at weather from 1 kilometre to 1000 kilometres. This includes things like thunderstorms, rain bands, and weather changes caused by mountains or bodies of water. Synoptic scale meteorology predicts weather changes up to 1000 kilometres and over about 3 days. This scale includes large weather systems like cyclones and jet streams, which are shown on weather maps. Global scale meteorology studies very large weather patterns, such as the movement of heat from the tropics to the poles, which can affect climate and weather over months or years.

Main article: Microscale meteorology

Main article: Mesoscale meteorology

Main article: Synoptic scale meteorology

Branches of meteorology

Based on methodological approach

Physical meteorology

Physical meteorology looks at how the atmosphere behaves. It studies how heat and energy move in the air, how clouds form, and what happens when water drops fall from the sky. It also looks at how light, electricity, and sound act in the atmosphere.

Dynamic meteorology

Dynamic meteorology explores how the air moves. It uses ideas from how fluids flow and how heat works to understand why the atmosphere behaves the way it does. Scientists think of tiny bits of air to study how temperature, pressure, and other factors change.

Synoptic meteorology

Synoptic meteorology is about looking at the weather over big areas at the same time. Meteorologists use maps and pictures from satellites to see how the air moves and changes. This helps them predict the weather for the next few days.

Based on scale

Boundary layer meteorology

Boundary layer meteorology studies the air right above the ground. This layer is affected by the surface, like how hot or cold it is and how rough the ground is. It looks at how heat, things floating in the air, and movement happen in this thin layer of air.

Applications

Weather forecasting

Main article: Weather forecasting

Weather forecasting is a way to guess what the weather will be like in the future. People have tried to guess the weather for thousands of years. Today, we use science and computers to help. We look at things like air pressure and current weather to make our guesses.

Computers help a lot, but we still need people to choose the best guess. The air can change in tricky ways, so forecasts are not always perfect. Weather forecasts help us know when to wear warm clothes, when to carry an umbrella, and how to plan outdoor fun.

Aviation meteorology

Main article: Aviation meteorology

Aviation meteorology looks at how weather affects airplanes. Pilots need to know about things like strong winds, ice, storms, and fog to keep flights safe. Learning about weather is a big part of training for pilots.

Agricultural meteorology

People who study agriculture look at how weather affects plants and farming. They care about things like rain, temperature, and how plants grow. They also study how plants and farms can affect the weather.

Hydrometeorology

Hydrometeorology is about water in the air, like rain and snow. Experts make forecasts to warn about heavy rain or snow that could cause flooding.

Nuclear meteorology

This area studies how radioactive materials move in the air.

Maritime meteorology

Maritime meteorology helps ships at sea by giving forecasts about the weather and waves. Groups like the Ocean Prediction Center and the National Weather Service make these forecasts for oceans around the world.

Military meteorology

Main article: Military meteorology

Military meteorology is about using weather knowledge for the military. In the United States, the Navy and Air Force have special teams that handle weather for their operations.

Environmental meteorology

Environmental meteorology looks at how weather affects things like pollution in the air.

Renewable energy

Main article: Energy meteorology

Meteorology helps us find the best places for wind and solar power by studying things like wind patterns and sunlight.

International cooperation

Weather happens all around the world and does not stop at country lines. To make good weather forecasts, weather services from different countries need to share what they see in the sky. In 1950, a group called the World Meteorological Organization was started to help countries share their weather data and information.