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The causality is the other way round: air spirals upwards and BECAUSE of that there is low pressure on the ground. The question should be WHY does the air rises upwards and WHY does it spiral?
The spiralling comes from the coriolis effect. The rising comes from differences in mass density (lower density rises above higher density). That density difference may come from temperature differences.
High pressure areas have the contrary effect: air falls down and causes high pressure on the ground.
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∙ 12y ago
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What are the characteristics of a low pressure system?
In a low pressure system, air is rising. Air spirals inwards in a clockwise direction. In a low pressure system, rising air cools and clouds begin to form. Low pressure systems usually cover a smaller area than high pressure systems and move faster. Low pressure systems are associated with high precipitation.
Why is precipitation heavier in the presistent low-pressure zones of the world?
Low barometric pressure usually indicates that air is flowing upwards. When air moves upwards it cools and the moisture in it may condense to form clouds and possibly produce rain and thunderstorms.
Is a tornado a violent windstorm that spirals around a rotating column of air of intense low pressure and moves in a narrow path over land?
Yes.
3 characteristics of a high pressure system?
In a high pressure system, air is sinking. Air spirals outwards in an anticlockwise direction. In a high pressure system, sinking air becomes warm and stable. High pressure systems usually cover a greater area than low pressure systems and move slower. If located over land, high pressure systems are usually cloud-free.
Why is cool air an area of low pressure?
Cool air is an area of low pressure because temperature is directly proportional to pressure. So when the pressure is low, the air is cool (low temperature).
What happens when air rushes into a low pressure region in the northern hemisphere?
Spirals into a counterclockwise direction.
What are the characteristics of a low pressure system?
In a low pressure system, air is rising. Air spirals inwards in a clockwise direction. In a low pressure system, rising air cools and clouds begin to form. Low pressure systems usually cover a smaller area than high pressure systems and move faster. Low pressure systems are associated with high precipitation.
Describe the pressure flow and condensation level of tornado?
A tornado creates an area of low barometric pressure. Air spirals into the tornado and then spirals upward within it. The low pressure in a tornado cools air flowing into it, causing moisture to condense into the characteristic funnel. In many cases, though not all, the condensation reaches all the way to the ground.
Why is precipitation heavier in the presistent low-pressure zones of the world?
Low barometric pressure usually indicates that air is flowing upwards. When air moves upwards it cools and the moisture in it may condense to form clouds and possibly produce rain and thunderstorms.
Is a tornado a violent windstorm that spirals around a rotating column of air of intense low pressure and moves in a narrow path over land?
Yes.
How does wind make up a tornado?
A tornado is a very intense vortex of air. Air spirals in towards the low pressure at the center of the tornado and is then drawn upwards. Most tornadoes form from a larger vortex called a mesocyclone, which is part of the updraft of some thunderstorms. At some point this vortex tightens and intensifies to form a tornado.
What is the difference between high pressure and low pressure?
about 40 lbs. Answer Improvement. Low pressure tires are used on farm equipment and vehicles like ATVs and the like. High pressure tire are used in industrial situations and autos and trucks. Basically because they are used on very hard or firm surfaces. Low pressure tires are used on soft and wet or marshy surfaces.
What direction do winds associated with a low-pressure system blow in the northern hemisphere?
It moves to the right YOUR WELCOME :)
What does high pressure move towards?
Air always flows from High Pressure towards Low Pressure. Wind is caused by the pressure gradient difference. In a high pressure system, within the Northern Hemisphere, air flows clockwise, outwards and downwards; in a low pressure system (in the NH), air flows anti-clockwise, inwards and upwards.
How does a tornado get its speed?
Tornadoes have very low pressure at their centers, this draws air inward through the pressure gradient force. The air spirals inward and accelerates due to the conservation of angular momentum, reaching great speeds as it approaches and enters the tornado.
Why does the air pressure go down when a tornado is near?
A tornado develops when the rotating updraft of a thunderstorm becomes focused on a smaller area. The updraft of the tornado draws air upwards, creating a center of low pressure.
3 characteristics of a high pressure system?
In a high pressure system, air is sinking. Air spirals outwards in an anticlockwise direction. In a high pressure system, sinking air becomes warm and stable. High pressure systems usually cover a greater area than low pressure systems and move slower. If located over land, high pressure systems are usually cloud-free.
