What Are The Pressure Conditions Of Air Above The Equator

What Are The Pressure Conditions Of Air Above The Equator?

The air above the equator tends to have lower air pressure than other areas on Earth. This is because the air there is warmer.

What is the air pressure like above the equator Why?

Equatorial regions is hotter and the air above expands becomes less dense and rises. This produces a low pressure belt at this latitude.

What are the pressure conditions of air above the equator apex?

The air above the Equator is very hot and rises creating an area of low pressure. The Equator experiences high amounts of rainfall due to this rising air resulting in a warm and wet equatorial climate (eg the Amazon and Congo tropical rainforests).

What is the air pressure at Equator?

The atmosphere exerts a pressure of 1034 gm per square cm at sea level. This amount of pressure is exerted by the atmosphere at sea level on all animals plants rocks etc. Near the equator the sea level pressure is low and the area is known as equatorial low.

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Where is the air pressure higher at the equator?

The cold air at the poles is denser than the warm air at the equator hence air pressure at sea level is higher at the poles than at the equator.

What are the pressure conditions of air above the poles?

The air above the poles tends to have higher air pressure than in other parts of the globe. This is because it is much colder there.

Where is the air pressure highest?

The highest sea-level pressure on Earth occurs in Siberia where the Siberian High often attains a sea-level pressure above 1050 mbar (105 kPa 31 inHg) with record highs close to 1085 mbar (108.5 kPa 32.0 inHg).

What layer of the atmosphere has the highest air pressure?

The Troposphere

The Troposphere contains about half of all the air in the entire atmosphere. Because it i at the bottom air pressure or the weight of the air is greatest in this layer.

What is the air like at the equator?

In the tropics near the equator warm air rises. When it gets about 10-15 km (6-9 miles) above the Earth surface it starts to flow away from the equator and towards the poles. Air that rose just north of the equator flows north. Air that rose just south of the equator flows south.

Why is the equator wet?

Near the Earth’s equator solar heating is intense year round. The Sun heats the ocean evaporating tremendous amounts of water. This daily cycle of heating evaporation and convection creates a persistent band of showers and storms around Earth’s middle.

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Why is there low pressure at the equator?

Cold air being more dense sinks and hot air being less dense rises. Consequently the rising warm air at the equator becomes even less dense as it rises and its pressure decreases. An area of low pressure therefore exists over the equator.

What are the factors affecting the air pressure?

Factors Affecting Air Pressure:
  • Temperature: As the temperature increases air expands because of which its density decreases which results in low pressure. …
  • Height from Sea Level: …
  • Moisture in Air (Humidity): …
  • Gravitation of Earth: …
  • Rotation of Earth:

What type of air pressure is at the poles?

In meteorology the polar highs are areas of high atmospheric pressure around the north and south poles the north polar high being the stronger one because land gains and loses heat more effectively than sea.

Is air pressure higher at the equator or the poles?

Explanation: Air pressure is highest at the equator and much lower at the poles. Guy-Lussac’s Law states that pressure is proportional to temperature at constant volume. Often people think that low pressure areas are warmer however this is only the case where volume is not constant.

Where would you expect to have lower pressure at the equator or at the poles?

Because of unequal solar heating temperatures vary over the entire globe the air at the equator is much warmer than at the poles. So the warm light air rises and spreads toward the poles and the colder heavier air sinks toward the equator.

What is the difference between low pressure and high pressure?

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. … A high pressure system has higher pressure at its center than the areas around it. Winds blow away from high pressure.

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Why are there high pressure caps at each pole and a low pressure belt in the equatorial region?

Why are there high-pressure caps at each pole and a low-pressure belt in the equatorial region? … The land heats the air around it and during the afternoon the warm low-density air over the land rises.

Is cold air high pressure?

Cold air is more dense therefore it has a higher pressure. Warm air is less dense and has a lower pressure associated with it. … Cold air on the other hand can create large areas of high pressure because cold air is more dense and hovers near the ground.

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What is the highest pressure possible?

Summary: An international team of scientists has created the highest static pressure ever achieved in a lab: Using a special high pressure device the researchers investigated the behavior of the metal osmium at pressures of up to 770 Gigapascals — more than twice the pressure in the inner core of the Earth.

What is considered high air pressure?

What is high atmospheric pressure? Atmospheric pressure is usually measured in inches of mercury (inHg or Hg). High air pressure is considered to be greater than 31 inches or can be less than 29 inches. Normal pressure at sea level is 29.92 inches.

What layer of atmosphere has the lowest air pressure?

The mesosphere is extremely cold especially at its top about −90 degrees C (−130 degrees F). The air in the mesosphere has extremely low density: 99.9 percent of the mass of the atmosphere is below the mesosphere. As a result air pressure is very low.

Which layer of the atmosphere has the second highest air pressure?

Thermosphere
Thermosphere. The thermosphere is the second-highest layer of Earth’s atmosphere. It extends from the mesopause (which separates it from the mesosphere) at an altitude of about 80 km (50 mi 260 000 ft) up to the thermopause at an altitude range of 500–1000 km (310–620 mi 1 600 000–3 300 000 ft).

Which layer of the atmosphere that has thickest air and highest pressure?

the troposphere

In the troposphere temperatures typically go down the higher you go since most of the heat found in the troposphere is generated by the transfer of energy from Earth’s surface. The troposphere is the densest atmospheric layer compressed by the weight of the rest of the atmosphere above it.

Is the air less dense at the equator?

The mass upflow or down flow of air in a given region is a factor that affects the air pressure. The density of the atmosphere near the surface is not constant in other words. At the poles it is very cold and dense and the equator it is warm and less dense.

What type of air mass is dominant near the equator?

Tropical air masses

Tropical air masses form within 25 degrees latitude of the equator. This means that the temperature will be warm or even hot. These masses abbreviated with a “T ” can develop over land or water.

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Why does the Sahara get no rain?

Hot moist air rises into the atmosphere near the Equator. … As it approaches the tropics the air descends and warms up again. The descending air hinders the formation of clouds so very little rain falls on the land below. The world’s largest hot desert the Sahara is a subtropical desert in northern Africa.

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What is the coldest zone of the earth?

What is the coldest place on Earth? It is a high ridge in Antarctica on the East Antarctic Plateau where temperatures in several hollows can dip below minus 133.6 degrees Fahrenheit (minus 92 degrees Celsius) on a clear winter night.

What is the closest city to the equator?

Quito
Quito is the closest capital city to the equator. Quito’s altitude is listed at 2 820 m (9 250 ft).

Why does air in low pressure region spiral upwards?

A low pressure area/ region means where a warm and moist air rises from the surface of the Earth. Here the Coriolis effect stops air moving in a straight line and so winds move in a spiral inwards and upwards in this case of a low pressure .

What band of pressure is created around the equator?

low pressure

Rising air in the Hadley cell along the equator produces deep clouds thunderstorms and rain in a band of low pressure called the Intertropical Convergence Zone (ITCZ).

Why does air flow from high to low pressure?

High pressure moves to low pressure because high pressure particles are pushing harder than the low pressure particles. Air will try to come to uniform pressure . Potential energy of air getting converted to kinetic energy .

What are the 3 factors that affect air pressure?

1)The 3 main factors that affect barometric (air) pressure are:
  • Temperature.
  • Altitude or Elevation.
  • Moisture ow water vapour.

How does altitude affect air pressure?

As altitude rises air pressure drops. In other words if the indicated altitude is high the air pressure is low. … As altitude increases the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level.

What can increase air pressure?

Air pressure can be increased (or decreased) one of two ways. First simply adding molecules to any particular container will increase the pressure. A larger number of molecules in any particular container will increase the number of collisions with the container’s boundary which is observed as an increase in pressure.

[Why series] Earth Science Episode 3 – High Air Pressure and Low Air Pressure

Atmospheric Pressure

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