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Weather station

earth science Maturity 5-7 Next article →

A weather station is a specialized facility designed to measure atmospheric conditions. These facilities can be located on land or at sea. They provide the essential data needed for weather forecasting and climate studies. By collecting specific measurements, these stations help scientists understand how the atmosphere behaves.

Mildura Airport Weatherstation
Mildura Airport Weatherstation

The data collected includes temperature, atmospheric pressure, and humidity. Stations also track wind speed, wind direction, and the amount of precipitation that falls.

To collect this data, stations use a variety of specialized instruments. A thermometer measures air and sea surface temperature. A barometer measures atmospheric pressure, which is the weight of the air. A hygrometer is used to measure humidity, or the moisture in the air. To track wind, an anemometer measures wind speed while a wind vane, or weather vane, shows the wind direction.

Davis VantagePro
Davis VantagePro

Other tools include a pyranometer for solar radiation and a rain gauge for liquid precipitation. Some stations even use an evaporation pan to measure how much water evaporates over time.

Proper placement of these instruments is critical for accuracy. Wind measurements must be taken with as few obstructions as possible to avoid interference. However, temperature and humidity sensors require different care. They are often kept inside a vented box called a Stevenson screen. This screen protects the thermometer from direct solar radiation, also known as insolation. It also shields the hygrometer from the wind.

2008-07-01 Elko ASOS viewed from the south cropped
2008-07-01 Elko ASOS viewed from the south cropped

Without this protection, the sun's heat would make the temperature readings inaccurate.

Automated stations, such as those at airports, use even more complex technology. These stations might use a present weather sensor to identify falling precipitation. A disdrometer can measure the size distribution of falling drops. For visibility, a transmissometer is used. To find the height of the clouds, known as the cloud ceiling, a ceilometer is employed.

NOAA weather station at Wake Island harbor
NOAA weather station at Wake Island harbor

Some advanced stations can even monitor the ultraviolet index, soil moisture, and leaf wetness.

Historically, weather observations at sea were conducted by dedicated weather ships. These ships acted as platforms for surface and upper air meteorological measurements. They also supported transatlantic flights and aided in search and rescue operations. In 1948, the International Civil Aviation Organization established a global network of 13 weather ships. By 1996, only 12 of these ships remained in operation. Nine were in the northern Atlantic and three were in the northern Pacific.

Polarfront
Polarfront

Since the 1960s, satellites and buoys have largely replaced these ships.

Today, weather buoys play a primary role in measuring ocean conditions. Moored buoys are connected to the seabed with chains, nylon, or polypropylene. Drifting buoys move with the currents and are much more numerous. There are 1,250 drifting buoys located worldwide.

NOAA-NDBC-discus-buoy
NOAA-NDBC-discus-buoy

These buoys measure sea surface temperature, wave height, and wave period. During the 1980s and 1990s, a network of these buoys helped scientists study the El Niño-Southern Oscillation in the Pacific Ocean.

Weather monitoring is also a community effort through personal weather stations. These are operated by individuals, clubs, or businesses. They use digital consoles to read data like UV radiation and barometric pressure. Many users participate in the Citizen Weather Observer Program (CWOP). They also share data with sites like Weather Underground or the UK Met Office's Weather Observations Website.

PULSONIC - PULSIA - Station Synoptique
PULSONIC - PULSIA - Station Synoptique

This shared information is actually used by the National Weather Service to improve forecast models.

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🖼️ Images & Media (7)
File:Mildura Airport Weatherstation.jpg
Mildura Airport Weatherstation.jpg
File:NOAA weather station at Wake Island harbor.jpg
NOAA weather station at Wake Island harbor.jpg
File:2008-07-01 Elko ASOS viewed from the south cropped.jpg
2008-07-01 Elko ASOS viewed from the...
File:Davis VantagePro.jpg
Davis VantagePro.jpg
File:Polarfront.jpg
Polarfront.jpg
File:NOAA-NDBC-discus-buoy.jpg
NOAA-NDBC-discus-buoy.jpg
File:PULSONIC - PULSIA - Station Synoptique.png
PULSONIC - PULSIA - Station Synoptique.png
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