describe stratospheric ozone destruction
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STRATOSPHERIC OZONE DEPLETION Ozone is also destroyed naturally in the stratosphere, being dissociated by ultraviolet radiation: This is the reaction that is responsible for O3's absorbtion of uv radiation that would otherwise reach earth.
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- But the ozone that is a byproduct of certain human activities does become a problem at ground level and this is what we think of as 'bad' ozone. With increasing populations, more automobiles, and more industry, there's more ozone in the lower atmosphere. Tropospheric ozone is often called bad ozone because it can damage living tissue and break down certain materials. 2  Concentrations of ozone are not uniform in the troposphere. 3  Longer exposure to ozone will increase the negative effects.
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- The ozone layer is a concentration of ozone molecules in the stratosphere. About 90% of the planet's ozone is in the ozone layer. The layer of the Earth's atmosphere that surrounds us is called the troposphere.The stratosphere, the next higher layer, extends about 10–50 kilometers above the Earth's surface.Stratospheric ozone is a naturally occurring gas that filters the sun's ultraviolet (UV) radiation.ost atmospheric ozone is concentrated in a layer in the stratosphere, about 15–30 kilometers above the Earth's surface. Ozone is a molecule containing three oxygen atoms. It is blue in color and has a strong odor. Normal oxygen, which we breathe, has two oxygen atoms and is colorless and odorless.
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- Ozone is a form of oxygen, the molecule contains three oxygen atoms and has the same chemical structure whether it is found high in the atmosphere or at ground-level. Ozone is unstable and will readily combine with other atoms. High in the atmosphere stratosphere ozone is present, and protects against ultraviolet radiation. In contrast to the good ozone in the stratosphere, ozone can present a problem at certain concentrations at ground-level. It is generated both from certain types of pollution and natural sources, including when atmospheric conditions cause stratospheric ozone down toward the earth's surface.
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- STRATOSPHERIC OZONE DEPLETION Ozone depletion is a global problem that is caused by human activities. This newmodule in the Global Change Instruction Program describes the chemistry of ozone,how ozone destruction is attributed to human activity, and what society is doing toavert further damage to the ozone layer.TRATOSPHERIC OZONE DEPLETION Ozone depletion is a global problem that is caused by human activities. This newmodule in the Global Change Instruction Program describes the chemistry of ozone,how ozone destruction is attributed to human activity, and what society is doing toavert further damage to the ozone layer.
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Other Direct Greenhouse Gases - Tropospheric Ozone The largest net source of tropospheric ozone is influx from the stratosphere. Large amounts of ozone are also produced in the troposphere by photochemical reactions, the amounts increasing with high levels of air pollution.Much of this ozone, though, is balanced by photochemical ozone destruction.he largest net source of tropospheric ozone is influx from the stratosphere. Large amounts of ozone are also produced in the troposphere by photochemical reactions, the amounts increasing with high levels of air pollution.
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- Ozone depletion and its causes. Ozone depletion is the term commonly used to describe the thinning of the ozone layer in the stratosphere. Ozone. depletion occurs when the natural balance between the production and destruction of ozone in the stratosphere is. tipped in favour of destruction. Human activity is the major factor in tipping that natural balance, mostly from. releasing artificial chemicals, known as ozone‐depleting substances (ODS), to the atmosphere.
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Stratospheric Ozone Layer Depletion and Recovery Most ozone is found in a layer more than 10 kilometers (6 miles) above the Earth. This stratospheric ozone layer prevents the Sun's harmful, high-energy radiation from reaching Earth's surface.
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- Ozone in the stratosphere absorbs most of the ultraviolet radiation from the Sun. Without ozone, the Sun’s intense UV radiation would sterilize the Earth’s surface. Ozone screens all of the most energetic, UV-c, radiation, and most of the UV-b radiation.
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- Most ozone (about 90%) resides in a layer that begins between 6 and 10 miles (10 and 17 kilometers) above the Earth's surface and extends up to about 30 miles (50 kilometers). This region of the atmosphere is called the stratosphere.The ozone in this region is commonly known as the ozone layer. The remaining ozone is in the lower region of the atmosphere, which is commonly called the troposphere. The figure (above) shows an example of how ozone is distributed in the atmosphere.zone thus plays a key role in the temperature structure of the Earth's atmosphere. Without the filtering action of the ozone layer, more of the Sun's UV-B radiation would penetrate the atmosphere and would reach the Earth's surface.
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Ozone layer Since stratospheric ozone is produced by solar UV radiation, one might expect to find the highest ozone levels over the tropics and the lowest over polar regions. The same argument would lead one to expect the highest ozone levels in the summer and the lowest in the winter.
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- Emissions from human activities and natural processes are large sources of chlorine-and bromine-containing gases for the stratosphere. When exposed to ultraviolet radiation from the Sun, these halogen source gases are converted to more reactive gases also containing chlorine and bromine. Important examples of the reactive gases that destroy stratospheric ozone are chlorine monoxide (CIO) and bromine monoxide (BrO).
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Tropospheric ozone Tropospheric ozone is a greenhouse gas and initiates the chemical removal of methane and other hydrocarbons from the atmosphere.
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Ozone depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about four percent in the total amount of ozone in Earth's stratosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar regions.[1] The latter phenomenon is referred to as the ozone hole ...
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- In the stratosphere, ozone is created primarily by ultraviolet radiation. When high-energy ultraviolet rays strike ordinary oxygen molecules (O 2), they split the molecule into two single oxygen atoms, known as atomic oxygen. A freed oxygen atom then combines with another oxygen molecule to form a molecule of ozone.There is so much oxygen in our atmosphere, that these high-energy ultraviolet rays are completely absorbed in the stratosphere. The relative heights of atmospheric layers.hen high-energy ultraviolet rays strike ordinary oxygen molecules (O 2), they split the molecule into two single oxygen atoms, known as atomic oxygen. A freed oxygen atom then combines with another oxygen molecule to form a molecule of ozone.
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- Stratospheric Ozone, the Protector. This section provides an overview of the ozone layer, that is, the layer of life-protecting ozone found at the top of the stratosphere. A brief history of the discovery of the ozone 'hole' is included.The general concepts found in this section include the following:n the graphic below, the destructive cycle of a chlorine atom is shown. 1  UV radiation breaks off a chlorine atom from a CFC molecule. 2  The chlorine atom attacks an ozone molecule (), breaking it apart and destroying the ozone. 3  The result is an ordinary oxygen molecule () and a chlorine monoxide molecule (ClO).
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- In the troposphere near the Earth’s surface, ozone forms through the splitting of molecules by sunlight as it does in the stratosphere. However in the troposphere, nitrogen dioxide, not molecular oxygen, provides the primary source of the oxygen atoms required for ozone formation.hen an electrically excited free oxygen atom encounters an oxygen molecule, they may bond to form ozone. Destruction of ozone in the stratosphere takes place as quickly as formation of ozone, because the chemical is so reactive. Sunlight can readily split ozone into an oxygen molecule and an individual oxygen atom.
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Ozone Depletion Pollution with chlorofluorocarbons alone has already resulted in a significant reduction in world ozone levels—enough to see an associated increase in skin cancer. In fact, every year a gigantic “hole” forms in the ozone layer over Antarctica, which may be a direct result of this damage. Many scientific research papers have shown a correlation between decreases in stratospheric ozone and skin cancer (for a review see: Diaz, HJ (2014) Impact of Stratospheric Ozone Depletion on Solar Radiation-Induced Skin Cancer.
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- Tropospheric ozone. Near Earth’s surface, ozone is produced by chemical reactions involving naturally occur-ring gases and gases from pollution sources. Ozone produc-tion reactions primarily involve hydrocarbon and nitrogen oxide gases, as well as ozone itself, and all require sunlight for completion.ropospheric ozone. Near Earth’s surface, ozone is produced by chemical reactions involving naturally occur-ring gases and gases from pollution sources. Ozone produc-tion reactions primarily involve hydrocarbon and nitrogen oxide gases, as well as ozone itself, and all require sunlight for completion.
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- The difference between stratospheric and tropospheric ozone is: Stratospheric ozone is GOOD (protects life on Earth from UV radiation) and tropospheric ozone is BAD (leads to harmful photochemical smog). Question.ood. c. Stratospheric ozone occurs near the earth and tropospheric ozone occurs higher up in the atmosphere. d. Stratospheric ozone causes health problems and tropospheric ozone protects us from harmful ultraviolet radiation.
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- Q3 Why do we care about atmospheric ozone? Good ozone. Stratospheric ozone is considered good for humans and other life forms because it absorbs ultra-violet-B (UV-B) radiation from the Sun (see Figure Q3-1). If not absorbed, UV-B radiation would reach Earth’s surface in amounts that are harmful to a variety of life forms. In
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- Tropospheric ozone is formed by the interaction of sunlight, particularly ultraviolet light, with hydrocarbons and nitrogen oxides, which are emitted by automobiles, gasoline vapors, fossil fuel power plants, refineries, and certain other industries.he general concepts found in this section include the following: 1  Ozone is a naturally occurring gas found in the troposphere and other parts of the atmosphere. 2  Tropospheric ozone is often called bad ozone because it can damage living tissue and break down certain materials. 3  Concentrations of ozone are not uniform in the troposphere. 4  Longer 5  ... T
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- 1 Tropospheric ozone is often called bad ozone because it can damage living tissue and break down certain materials. 2  Concentrations of ozone are not uniform in the troposphere. 3  Longer exposure to ozone will increase the negative effects.he general concepts found in this section include the following: 1  Ozone is a naturally occurring gas found in the troposphere and other parts of the atmosphere. 2  Tropospheric ozone is often called bad ozone because it can damage living tissue and break down certain materials.
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Good Ozone, Bad Ozone Stratospheric ozone is found in the stratosphere, a layer of air way up in the atmosphere. The stratosphere is between 8 and 30 miles above the ground-too far away for you to breathe any of its air! The ozone in this layer of air protects plants, animals, and us by blocking the most harmful rays of the sun.
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What is Ozone? Stratospheric “good” ozone. Ninety percent of the ozone in the atmosphere sits in the stratosphere, the layer of atmosphere between about 10 and 50 kilometers altitude. The natural level of ozone in the stratosphere is a result of a balance between sunlight that creates ozone and chemical reactions that destroy it.zone protects life on Earth from the Sun’s ultraviolet (UV) radiation. In the lower atmosphere (the troposphere) near the Earth’s surface, ozone is created by chemical reactions between air pollutants from vehicle exhaust, gasoline vapors, and other emissions.
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- Stratospheric ozone production. Ozone is naturally produced in the stratosphere by a two-step reactive process. In the first step, solar ultraviolet radiation (sunlight) breaks apart an oxygen molecule to form two separate oxygen atoms.ropospheric ozone. Near Earth’s surface, ozone is produced by chemical reactions involving naturally occur-ring gases and gases from pollution sources. Ozone produc-tion reactions primarily involve hydrocarbon and nitrogen oxide gases, as well as ozone itself, and all require sunlight for completion.