How Does Temperature Affect Air Movement? by Molly Elliott on Prezi
You can wet your finger and hold it up to find the wind's direction. warm air does. Therefore, a cold air mass is called a high-pressure area. P is pressure,; V is volume; m is mass; R is the universal gas constant; T is temperature. Now, density, ρ = m / V. Which leads to the equation. The wind blows because of differences in air pressure from one location to another. Wind blows from areas of high pressure toward areas of low pressure.
One climbs up and stands on another's shoulders. The weight of the acrobat on top puts more pressure on the one below. Then another acrobat climbs up and stands on the second acrobat's shoulders. Now there's even more pressure on the acrobat on the bottom because he is under the weight of the two acrobats above him.
It's the same with air. Yes, air has weight, and probably more than you think. In fact, the weight of the air on your desk at school weighs about 11, pounds. That's about the same weight as a school bus!
Since air pressure pushes in all directions, the air pressure pushing up from under your desk balances out the air pushing down on it, so the desk doesn't collapse under the weight.
Weather Related Migraines: 8 Tips to Dodge Another Brain Storm - Migraine Again
Just like an acrobat with two people stacked on his shoulders would want to move to where there wasn't so much pressure on him, air moves from areas where the pressure is higher to where it is lower.
The difference in air pressure between two adjacent air masses over a horizontal distance is called the pressure gradient force. The greater the difference in pressure, the greater the force and the stronger the wind. The Coriolis effect and wind direction An important factor affecting the direction in which winds actually blow is the Coriolis effectnamed for French mathematician Gaspard-Gustave de Coriolis — InCoriolis discovered that a force appears to be operating on any moving object situated on a rotating body, such as a stream of air traveling on the surface of a rotating planet.
Because of the spinning of Earth, any moving object above the planet's surface tends to drift sideways from its course of motion.
Thus winds are deflected from their straightforward direction. In the Northern Hemisphere, the Coriolis effect tends to drive winds to the right. In the Southern Hemisphere, it tends to drive winds to the left. Words to Know Coriolis effect: A force exemplified by a moving object appearing to travel in a curved path over the surface of a spinning body.
Small-scale winds that result from differences in temperature and pressure in localized areas. Difference in air pressure between two adjacent air masses over a horizontal distance.
Friction and wind movement The Coriolis effect and pressure gradient forces are the only factors affecting the movement of winds in the upper atmosphere. Such is not the case near ground level, however. An additional factor affecting air movements near Earth's surface is friction.
What you should know about barometric pressure and headaches
As winds pass over the surface, they encounter surface irregularities hills, mountains, etc. The decrease in wind speed means that the Coriolis effect acting on the winds also decreases. Since the pressure gradient force remains constant, the wind direction is driven more strongly toward the lower air pressure, often resulting in gusts.
Local winds Local winds are small-scale winds that result from differences in temperature and pressure in localized areas. Sea and land breezes are typical of such winds. According to our Facebook audienceThe Migraine Forecast is remarkably accurate.
We like the Ambient Weather Barometer. The advantage of having it on your desk or in your kitchen is the visual heads-up it will give you of barometric changes. Limit Your Other Triggers — Once you know that a storm is on its way or underway, the key to avoiding a weather related migraine attack is to limit your exposure to other triggers. Avoid positive or negative stress, guard your sleep, avoid any potential food and drink triggers, ensure you exercise and practice the best prevention protocol possible.
Weather Related Migraines: 8 Tips to Dodge Another Brain Storm
If All Else Fails, Move — Yes, this seems like a radical idea to many, but if Chronic Migraines are ruining your life and you can get better control of a major trigger by moving, this might be an option for you.
Before you do, ponder the wise advice of lifelong Migraine blogger Kerrie Smyres, who relocated from Seattle to Phoenix. In the US, discover the best and worst places to live with Migraines.