What are the weather observation methods?

Tracking the weather is sometimes as simple as observing the wind direction, but sometimes it is as complicated as launching a satellite worth hundreds of millions of yuan. Meteorological monitoring still depends on some basic measurement methods-observation of temperature, humidity, wind and air pressure. For centuries, these have been part of the work of meteorologists. It is still very complicated to estimate these weather characteristics, but their variables are consistent. In recent decades, these standard observation data collected in the field can be completed by a variety of remote sensing instruments. Radar, satellites and other equipment can now report weather conditions more than ten miles, hundreds of miles or even thousands of miles away.

In the past, mercury thermometers or alcohol thermometers were used to measure temperature, but at the beginning of17th century, the first thermometers used were air and alcohol. The atmosphere gets hot, the liquid expands and the liquid level in the thermometer rises. Nowadays, digital thermometers rely on internal changes in the electronic characteristics of circuits or resistors. Most weather stations publish records of the highest or lowest temperature every 24 hours, mainly according to the actual temperature changes. The United States uses Fahrenheit, while other regions use Celsius.