For fine particles to get dispersed throughout the globe via atmospheric circulation, in what level of the atmosphere would they have to travel?

Asked by: Phil Mayer

What is the global atmospheric circulation?

The global circulation can be described as the world-wide system of winds by which the necessary transport of heat from tropical to polar latitudes is accomplished. In each hemisphere there are three cells (Hadley cell, Ferrel cell and Polar cell) in which air circulates through the entire depth of the troposphere.

What makes up 99 of the atmosphere?

Nitrogen and oxygen account for 99 percent of the gases in dry air, with argon, carbon dioxide, helium, neon, and other gases making up minute portions.

What makes up less than 1% of the atmosphere?

Argon, carbon dioxide (CO2), and many other gases are also present in much lower amounts; each makes up less than 1% of the atmosphere’s mixture of gases. The atmosphere also includes water vapor. The amount of water vapor present varies a lot, but on average is around 1%.

What particles can be found in the atmosphere?

Earth’s atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.

How does global atmospheric circulation cause high and low pressure belts?

Air rises at the equator, leading to low pressure and rainfall. When the air reaches the edge of the atmosphere, it cannot go any further and so it travels to the north and south. The air becomes colder and denser, and falls, creating high pressure and dry conditions at around 30° north and south of the equator.

What causes global atmospheric circulation?

Even with disruptions like weather fronts and storms, there is a consistent pattern to how air moves around our planet’s atmosphere. This pattern, called atmospheric circulation, is caused because the Sun heats the Earth more at the equator than at the poles. It’s also affected by the spin of the Earth.

Which of the following makes 99% of air?

The atmosphere is composed mainly of nitrogen and oxygen, which make up about 99 per cent of clean, dry air.

What are the 7 atmosphere layers?

From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.

• Troposphere. …
• Stratosphere. …
• Mesosphere. …
• Thermosphere. …
• Exosphere. …
• The Edge of Outer Space.

Why is nitrogen 78 percent of the atmosphere?

‘ Nitrogen makes up 78 per cent of the air we breathe, and it’s thought that most of it was initially trapped in the chunks of primordial rubble that formed the Earth. When they smashed together, they coalesced and their nitrogen content has been seeping out along the molten cracks in the planet’s crust ever since.

What gases make up 1% atmosphere?

Argon makes up about 1% of the atmosphere and comes mostly from the decay of potassium in the Earth’s crust. It is an inert gas, which means that it does not react with other chemicals. Water is cycled through all of Earth’s systems in each of its three phases: solid, liquid, or gas.

Which layer of the atmosphere has very thin and cold air?

the mesosphere

The layer of very rare air above the mesosphere is called the thermosphere. High-energy X-rays and UV radiation from the Sun are absorbed in the thermosphere, raising its temperature to hundreds or at times thousands of degrees. However, the air in this layer is so thin that it would feel freezing cold to us!

What happens to air pressure as you go higher in the atmosphere?

As the atmosphere expands the further you get from the Earth’s surface, it becomes less dense and air pressure decreases.

Why is there low pressure at 60 degrees?

At the same time, the sinking air at the north pole flows south and collides with the air moving north from the 30° high pressure area. The colliding air is forced upward and an area of low pressure is created near 60° north.

What’s the name of the model that describes how air circulates between low and high pressure belts as a result of differing conditions at different latitudes?

The global atmospheric circulation model describes how air circulates between low and high-pressure belts as a result of differing conditions at different latitudes. The Earth’s surface is warmed by the Sun at the equator. The Earth transfers this heat to the air, which then rises because it is hot.

Why does air rise at 60 latitude?

The overall effect of the Polar cell is to move cold air towards the equator. At the poles (i.e. 90° of latitude) the cold air sinks. It then moves towards the equator. At 60° the combination of warm and cold air causes the warm air to rise, resulting in low air pressure at 60°.

What are global atmospheric circulation cells made up of?

The 3 cells that make up the Global Atmospheric Circulation Model: Hadley, Ferrel, and Polar.

What is GAC in geography?

Global atmospheric circulation creates winds across the planet and leads to areas of high rainfall, like the tropical rainforests, and areas of dry air, like deserts.

How does global circulation affect climate?

The combination of oceanic and atmospheric circulation drives global climate by redistributing heat and moisture. Areas located near the tropics remain warm and relatively wet throughout the year. In temperate regions, variation in solar input drives seasonal changes.

Is a global scale tropical atmospheric circulation?

The Hadley cell, named after George Hadley, is a global-scale tropical atmospheric circulation that features air rising near the equator, flowing poleward at a height of 10 to 15 kilometers above the earth’s surface, descending in the subtropics, and then returning equatorward near the surface.

Which is true of upper atmospheric circulation?

Which is true of upper atmospheric circulation? Middle and upper tropospheric circulation is an important component of the atmosphere’s general circulation.

Why does the Earth have three primary atmospheric circulation cells?

The Earth has three primary atmospheric circulation cells as a result of the Coriolis effect. As air moves toward the equator, the rotation of the Earth causes it to curve to the west. This slows its progression toward the equator and the air warms, rises, and head away from the equator.