10 the subdivision of the atmosphere where most weather phenomena occur is the Ideas

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the atmosphere

The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth’s surface is called the exosphere.

The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth’s surface, is called the exosphere.

The Troposphere

This is the lowest part of the atmosphere – the part we live in. It contains most of our weather – clouds, rain, snow. In this part of the atmosphere the temperature gets colder as the distance above the earth increases, by about 6.5°C per kilometre. The actual change of temperature with height varies from day to day, depending on the weather.

The troposphere contains about 75% of all of the air in the atmosphere, and almost all of the water vapour (which forms clouds and rain). The decrease in temperature with height is a result of the decreasing pressure. If a parcel of air moves upwards it expands (because of the lower pressure). When air expands it cools. So air higher up is cooler than air lower down.

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The lowest part of the troposphere is called the boundary layer.  This is where the air motion is determined by the properties of the Earth’s surface.  Turbulence is generated as the wind blows over the Earth’s surface, and by thermals rising from the land as it is heated by the sun.  This turbulence redistributes heat and moisture within the boundary layer, as well as pollutants and other constituents of the atmosphere. 

The top of the troposphere is called the tropopause. This is lowest at the poles, where it is about 7 – 10 km above the Earth’s surface. It is highest (about 17 – 18 km) near the equator.

The Stratosphere

This extends upwards from the tropopause to about 50 km. It contains much of the ozone in the atmosphere. The increase in temperature with height occurs because of absorption of ultraviolet (UV) radiation from the sun by this ozone. Temperatures in the stratosphere are highest over the summer pole, and lowest over the winter pole.

By absorbing dangerous UV radiation, the ozone in the stratosphere protects us from skin cancer and other health damage. However chemicals (called CFCs or freons, and halons) which were once used in refrigerators, spray cans and fire extinguishers  have reduced the amount of ozone in the stratosphere, particularly at polar latitudes, leading to the so-called “Antarctic ozone hole”.

Now humans have stopped making most of the harmful CFCs we expect the ozone hole will eventually recover over the 21st century, but this is a slow process.

The Mesosphere

The region above the stratosphere is called the mesosphere. Here the temperature again decreases with height, reaching a minimum of about -90°C at the “mesopause”.

The Thermosphere and Ionosphere

The thermosphere lies above the mesopause, and is a region in which temperatures again increase with height. This temperature increase is caused by the absorption of energetic ultraviolet and X-Ray radiation from the sun.

The region of the atmosphere above about 80 km is also caused the “ionosphere”, since the energetic solar radiation knocks electrons off molecules and atoms, turning them into “ions” with a positive charge. The temperature of the thermosphere varies between night and day and between the seasons, as do the numbers of ions and electrons which are present. The ionosphere reflects and absorbs radio waves, allowing us to receive shortwave radio broadcasts in New Zealand from other parts of the world.

The Exosphere

The region above about 500 km is called the exosphere. It contains mainly oxygen and hydrogen atoms, but there are so few of them that they rarely collide – they follow “ballistic” trajectories under the influence of gravity, and some of them escape right out into space.

The Magnetosphere

The earth behaves like a huge magnet. It traps electrons (negative charge) and protons (positive), concentrating them in two bands about 3,000 and 16,000 km above the globe – the Van Allen “radiation” belts. This outer region surrounding the earth, where charged particles spiral along the magnetic field lines, is called the magnetosphere.

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Further information

Visit our Atmosphere National Science Centre

Read about our UV and ozone research 

Extra Information About the subdivision of the atmosphere where most weather phenomena occur is the That You May Find Interested

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Layers of the atmosphere – NIWA

Layers of the atmosphere - NIWA

  • Author: niwa.co.nz

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  • Sumary: The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere.

  • Matching Result: This is the lowest part of the atmosphere – the part we live in. It contains most of our weather – clouds, rain, snow. In this part of the atmosphere the …

  • Intro: Layers of the atmosphereThe atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth’s surface is called the exosphere. The atmosphere can be divided into layers based on its temperature, as shown in…
  • Source: https://niwa.co.nz/education-and-training/schools/students/layers

Meteorological Phenomenon – an overview – ScienceDirect.com

Meteorological Phenomenon - an overview - ScienceDirect.com

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  • Sumary: It is a meteorological phenomenon characterized by a closed circulation system around a center of low pressure, driven by heat energy released as moist air drawn in over warm ocean waters rises and…

  • Matching Result: Atmospheric processes may further be subdivided by employing criteria other than spatiotemporal characteristics. For instance, Orlanski (1975) and Thunis …

  • Intro: Meteorological Phenomenon – an overviewIt is a meteorological phenomenon characterized by a closed circulation system around a center of low pressure, driven by heat energy released as moist air drawn in over warm ocean waters rises and condenses.From: Encyclopedia of Ocean Sciences (Second Edition), 2009MeteorologyJ.S.M. Coleman, K.T. Law, in Reference…
  • Source: https://www.sciencedirect.com/topics/earth-and-planetary-sciences/meteorological-phenomenon

Frequently Asked Questions About the subdivision of the atmosphere where most weather phenomena occur is the

If you have questions that need to be answered about the topic the subdivision of the atmosphere where most weather phenomena occur is the, then this section may help you solve it.

Which layer of the atmosphere contains the majority of weather phenomena?

troposphere

Where in the atmosphere do weather phenomena occur?

All weather phenomena occur within the troposphere, although turbulence may extend into the lower portion of the stratosphere. Troposphere means “region of mixing” and is so named because of vigorous convective air currents within the layer.

Quiz: Which layer of the atmosphere has the greatest frequency of weather phenomena?

The majority of what we refer to as weather takes place in the troposphere, which is heated unevenly by the Sun, resulting in convection currents and winds.

What takes place in space?

The very important ozone layer, which helps shield us from ultraviolet radiation (UV) from the sun and actually absorbs the majority of the UV radiation the sun sends our way, is found in the stratosphere. Without this layer of defense, life as we know it would not be possible.

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Why do weather-related events take place in the troposphere?

Basically because that layer contains the majority of the water vapor and is where there is the greatest energy disparity between the surface and the atmosphere.

Why is the troposphere where most weather phenomena take place?

Since the troposphere contains nearly all of the atmosphere’s water vapor or moisture and contains 50% of the total mass of the atmosphere, it is the layer where most of Earth’s weather occurs.

Why do weather-related events take place in the troposphere?

The formation of clouds, rain, thunder, differences in temperature and pressure, etc. are all caused by the presence of water vapor, dust particles, and other elements in the troposphere.

The troposphere is known as the Weathersphere for a reason.

Since water vapor no longer exists in the atmosphere after the tropopause, the troposphere is also referred to as the “weather sphere.” Figure shows the temperature, pressure, and water vapor values for each of the layers of the atmosphere.

How does the troposphere function?

The troposphere, the lowest layer of the Earth’s atmosphere, contains the majority of the atmosphere’s mass (roughly 75–80%), the majority of the planet’s cloud types, and the majority of its weather.

In what does the troposphere exist?

In fact, the troposphere makes up three-quarters of the mass of the entire atmosphere. The air in this lowest layer is made up of 78% nitrogen, 21% oxygen, and the final 1% is composed of argon, water vapor, and carbon dioxide.

How does a thermosphere function?

High latitude thermosphere atoms and molecules are excited into higher energy states by space-borne charged particles (protons, electrons, and other ions) and release this extra energy by emitting photons of light, which we perceive as vibrant auroral displays.

In a nutshell, what is stratosphere?

This diagram illustrates some of the characteristics of the stratosphere, which is a layer of the Earth’s atmosphere and the second layer as one moves upward from the troposphere, the lowest layer, to the mesosphere, the next higher layer above the stratosphere.

What is known about the exosphere?

The exosphere, which is the uppermost part of Earth’s atmosphere as it gradually disappears into space, has extremely thin air and is in many ways similar to the airless void of space.

What do the stratosphere and troposphere mean?

The troposphere, which is the most dense part of the atmosphere and extends from the Earth’s surface to a height of 8 to 14.5 kilometers (5 to 9 miles), is where almost all weather occurs. The stratosphere, on the other hand, begins just above the troposphere and rises to a height of 50 kilometers (31 miles).

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