What Helps Maintain Global Oxygen Concentrations In The Troposphere?


What Helps Maintain Global Oxygen Concentrations In The Troposphere??

What helps maintain global oxygen concentrations in the troposphere? Oxygen levels remain balanced by photosynthesis and cellular respiration.

What gases make up the troposphere?

GAS Today’s Amount % Mesozoic*
Nitrogen 78.0 70.0
Oxygen 21.0 27.0
Argon 0.9 0.9

What does the air in the troposphere do as it heats up from the sun?

What does the air in the troposphere do as it heats up from the sun? Hot air rises cold air sinks. This creates convection currents.

Why ozone is called secondary pollutants?

Ground-level ozone is a colorless and highly irritating gas that forms just above the earth’s surface. It is called a “secondary” pollutant because it is produced when two primary pollutants react in sunlight and stagnant air. These two primary pollutants are nitrogen oxides (NOx) and volatile organic compounds (VOCs).

What is the difference between the troposphere and stratosphere What key role does the stratosphere play in maintaining life on the earth?

Temperatures in the troposphere decrease with altitude. The stratosphere is the next layer up from Earth’s surface. … This ozone absorbs some of the incoming solar radiation shielding life on Earth from potentially harmful ultraviolet (UV) light and is responsible for the temperature increase in altitude.

What occurs in troposphere?

The troposphere is the lowest layer of Earth’s atmosphere. Most of the mass (about 75-80%) of the atmosphere is in the troposphere. Most types of clouds are found in the troposphere and almost all weather occurs within this layer. … Air pressure and the density of the air also decrease with altitude.

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Which gas has highest concentration in troposphere?

Most prevalent gases are nitrogen (78 percent) and oxygen (21 percent) with the remaining 1- percent consisting of argon (. 9 percent) and traces of hydrogen ozone ( a form of oxygen) and other constituents. Temperature and water vapor content in the troposphere decrease rapidly with altitude.

Why do temperatures decrease in the troposphere and increase in the stratosphere?

The troposphere is heated from the ground so temperature decreases with altitude. Because warm air rises and cool air sinks the troposphere is unstable. In the stratosphere temperature increases with altitude. The stratosphere contains the ozone layer which protects the planet from the Sun’s harmful UV radiation.

What happens to air as it rises in the troposphere quizlet?

What happens to air as it rises in the troposphere? It cools condenses and forms clouds. … Air moves from low pressure to high pressure creating wind.

How is the troposphere heated up?

The troposphere gets some of its heat directly from the Sun. Most however comes from Earth’s surface. The surface is heated by the Sun and radiates back into the air.

Is ozone a pollutant in the troposphere?

In the stratosphere ozone protects life on Earth from the sun’s ultraviolet radiation. In contrast at lower levels it is an important greenhouse gas and air pollutant which is harmful to human and ecosystem health. … Tropospheric ozone is a short-lived climate pollutant with an atmospheric lifetime of hours to weeks.

What creates tropospheric ozone?

Tropospheric or ground level ozone is not emitted directly into the air but is created by chemical reactions between oxides of nitrogen (NOx) and volatile organic compounds (VOC).

What produces smog?

Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust coal power plants and factory emissions. … When sunlight hits these chemicals they form airborne particles and ground-level ozone—or smog.

What pollutant is considered harmful in the troposphere but beneficial in the stratosphere?

However at lower elevations of the atmosphere (the troposphere) ozone is harmful to human health. There are human-made industrial chemicals that break down ozone in the stratosphere and create holes in the ozone layer.

Why is the situation in the troposphere defined as unstable?

The situation in the troposphere is defined as unstable because the reaction of the natural atmospheric phenomenon like climate temperature humidity rainfall etc. are not realists predictable and stable. And all weather and atmospheric activities (thunder storm rainfall clouds formation etc.)

Why is the troposphere important?

MEMPHIS TN (WMC) -The troposphere is the lowest layer of Earth’s atmosphere and the site of all-weather on Earth. … Water vapor it important as it will absorb solar energy and thermal radiation from the surface of Earth thus regulating the air temperature.

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How does the troposphere protect us?

Troposphere is protected from hard UV radiation

Because of this protection many molecules are more stable in the troposphere then elsewhere in the atmosphere. This protection makes life possible on Earth.

What is the troposphere most influenced by?

Planetary boundary layer. The lower levels of the troposphere are usually strongly influenced by Earth’s surface. This sublayer known as the planetary boundary layer is that region of the atmosphere in which the surface influences temperature moisture and wind velocity through the turbulent transfer of mass.

How does convection occur in troposphere?

How does convection occur in the troposphere? Warm air rises and cool air sinks. Which is a type of heat transfer that causes the air at the top floor of a building to be hotter than the air at the bottom floor of a building?

How do scientists measure gas concentrations in the atmosphere?

Scientists measure the amount of greenhouse gases in the atmosphere in several ways. They use satellites and other instruments to measure the amount of greenhouse gases in the air all around the world. They also collect samples of air from specific places and then analyze these samples in a laboratory.

Why do we concentrate primarily on the troposphere rather than on other zones of the atmosphere?

Why do we concentrate on the troposphere more than other layers of the atmosphere? Most of the earth’s gases are here. It is also where weather takes place. … Temperature drop with increasing altitude in the troposphere then rises again in the stratosphere.

What substance is responsible for the increasing concentrations of nitrous oxide in the atmosphere?

About 45% of N2O emissions are produced naturally by bacteria breaking down nitrogen compounds in soil and water. The other 55% of emissions come from human activities especially from burning fuels from industrial processes and from the use of nitrogen fertilisers and manure in agriculture.

What causes the temperatures in the lower troposphere to be warmer?

In the troposphere the temperature generally decreases with altitude. The reason is that the troposphere’s gases absorb very little of the incoming solar radiation. Instead the ground absorbs this radiation and then heats the tropospheric air by conduction and convection.

Does the temperature increase or decrease in the troposphere?

As the density of the gases in this layer decrease with height the air becomes thinner. Therefore the temperature in the troposphere also decreases with height in response. As one climbs higher the temperature drops from an average around 62°F (17°C) to -60°F (-51°C) at the tropopause.

How does temperature change with altitude in the troposphere?

Temperature varies with altitude as follows: In the troposphere temperature decreases as altitude increases. In the stratosphere temperature generally increases as altitude increases due to the increasing absorption of ultraviolet radiation by the ozone layer.

Why does air pressure decrease from troposphere to exosphere?

Chuck W. Atmospheric pressure in the troposphere drops by about 1 inch of mercury for every thousand feet of altitude above sea level. Gravity of the earth holds our atmosphere close to the surface so the density (and pressure) of air gets gradually lower as you go to higher altitude.

What happens to air as it rises through the troposphere?

As one rises through the troposphere the temperature decreases. Air pressure and the density of the air also decrease with altitude. … The troposphere is heated from below sunlight warms the ground or ocean which in turn radiates the heat into the air immediately above it.

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What happens to the air pressure as you move from the troposphere to the exosphere quizlet?

What happens to the air pressure as you move from the troposphere to the exosphere? … More dense air SINKS. Cold air is MORE dense than warm air and thus SINKS. Warm air is LESS dense than cold air and thus RISES.

What is the main source of heat in the troposphere?

the Sun

What is the source of heat for the troposphere? Earth’s surface is a major source of heat for the troposphere although nearly all of that heat comes from the Sun. Rock soil and water on Earth absorb the Sun’s light and radiate it back into the atmosphere as heat.

What moves air and thermal energy throughout the troposphere?

The bulk of heat energy transferred in the troposphere is done by convection. Convection does not only mean thunderstorm clouds but means any mixing of air. Air is always on the move (rising sinking and advecting). The air mixes as it moves into the surrounding air.

How does convection occur in the troposphere Brainly?

Warm air rises and cool air sinks. The warm ground heats the air above it. The Sun’s electromagnetic waves reflect off clouds.

How is ozone helpful in the upper troposphere?

Ozone acts as an important infrared absorber (greenhouse gas) particularly in the upper troposphere and also is an absorber of solar ultraviolet (UV) radiation.

Why is ozone in the troposphere harmful?

Ozone occurs in two layers of the atmosphere. The layer closest to the Earth’s surface is the troposphere. Here ground- level or “bad” ozone is an air pollutant that is harmful to breathe and it damages crops trees and other vegetation. … Once released into the air these ozone-depleting substances degrade very slowly.

What natural chemical breaks down ozone in the troposphere?

Ozone Depletion. When chlorine and bromine atoms come into contact with ozone in the stratosphere they destroy ozone molecules. One chlorine atom can destroy over 100 000 ozone molecules before it is removed from the stratosphere.

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