Table of Contents
Pressure and temperature are related to each other by Gay-Lussac’s Law. The relationship between the two is that air temperature changes the air pressure. For example, as the air warms up the molecules in the air become more active and they use up more individual space even though there is the same number of molecules.
What is the relationship between high and low pressure?
Areas of high and low pressure are caused by ascending and descending air. As air warms it ascends, leading to low pressure at the surface. As air cools it descends, leading to high pressure at the surface.
Does high-pressure mean high temperature?
An area of higher pressure, H, is called a high-pressure system and generally has a denser air mass where air temperature is cool. These systems often bring warmer temperatures and dry weather. The lower concentration of molecules causes lower air pressure in these areas.
What type of weather is associated with high air pressure?
fair weather
A high pressure system is a whirling mass of cool, dry air that generally brings fair weather and light winds. When viewed from above, winds spiral out of a high-pressure center in a clockwise rotation in the Northern Hemisphere. These bring sunny skies.
What happens when the air pressure is high or low?
Places where the air pressure is high, are called high pressure systems. A low pressure system has lower pressure at its center than the areas around it. Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation.
Why is high pressure associated with warm weather?
High pressure can prevent the formation of clouds, allowing for blue skies and clear, warm weather. Air cools as it rises and any moisture in the air can turn into rain or snow and fall back to the ground. This is why low pressure is associated with bad weather.
Why do winds blow towards a low pressure system?
Winds blow towards the low pressure, and the air rises in the atmosphere where they meet. As the air rises, the water vapor within it condenses, forming clouds and often precipitation. Because of Earth’s spin and the Coriolis Effect, winds of a low pressure system swirl counterclockwise north of the equator and clockwise south of the equator.
How does the relationship between temperature and air pressure?
Proportionality of Temperature and Pressure. Atmospheric pressure and temperature are proportional, meaning that when the temperature increases, air pressure increases and when temperature decreases, air pressure decreases. The relationship between temperature and air pressure is referred to as Gay-Lussac’s Law.