What is this in meteorology?
"Station pressure" is a term used in meteorology that describes the air pressure at the message site. In fact, it measures the relationship between the air weight that extends in the column directly above the area of measurement and size of the measured area. The air pressure measurement depends on the altitude and the air temperature on the station, so that the widely different pressure values can be shown simultaneously depending on where the station is located.
Although it cannot be seen or held, the air that forms the Earth's atmosphere is very difficult. The weight of this air exerts pressure on the Earth's surface, which is what is actually measured to obtain air pressure reading. To measure this pressure, a tool known as a barometer is used. Most barometers use either liquid, mercury or metal structure similar to the accordion, as the pressure increases and expands as it decreases. Reading measurement directly from the barometer is known as the station PESTHIP.
The station pressure may vary depending on the altitude of the station. ThereforeThat the pressure measures the air weight in the column above the station, the higher the station, the shorter the air column. The station, which is several thousand feet up to the mountain, will generally have much lower pressure than one on the sea level, simply because there is less air over it.
The temperature is another factor that can affect the station pressure values. As the temperature drops, the air becomes slow and denser, which increases the weight of the air. When the weight increases, the pressure also increases, causing a higher value of the station pressure. The air pressure is also usually higher above the sea than on the ground, because the water heats up more slowly than the soil, thereby maintaining the surface temperature generally lower. It is important to realize that these relationships are often complicated by factors such as the wind and the rotation of the Earth and is usually more complex than the basic concept of the station pressure would indicate.
weather also plays a major role in the air pressure shiftchu; The thermometer and barometer reads are often used to predict weather patterns. A significant decline in the barometer usually suggests that the air mixture is hit by lighter water vapor, which are associated with storms, hurricanes and tornadoes. If the pressure on the station suddenly drops, it may indicate a storm on the horizon. On the other hand, a sudden increase indicates dry weather or ice frosts.
The number of station pressure is usually given either in inches (or centimeters) of mercury or hektopascals. This measurement concerns the extent to which the mercury level is pushed on a liquid -based barometer. Hectopascals, who are also sometimes called MilliBiS, give a more direct reading of air pressure.