Ozone Layer PPT
THE OZONE LAYER What is it? Where is it? Why is it important to life on Earth? How are we as humans affecting it? What is the ozone layer? The ozone layer is a layer of gas consisting of O3 molecules, called ozone, that forms when free Oxygen molecules bond to O2 molecules.
Ozone and Environment Ozone O3 a gas composed of three atoms of oxygen bluish gas that is harmful to breathe Nearly 90% of the Earth's ozone is in the stratosphere and is referred to as the ozone layer Ozone absorbs a band of ultraviolet radiation called UVB Ozone-Depleting Substance(s) (ODS ...
Ozone (O3) in the Atmosphere The good, the bad, the mesospheric? In the Troposphere (“Bad Ozone”) Harmful pollutant Created in a reaction between nitrogen oxides (NOx), volatile organic compounds (VOCs) and sunlight Highest concentrations in warm summer weather Created in urban areas, blown ...
Effects of Ozone Depletion The Discovery In 1985, using satellites, balloons, and surface stations, a team of researchers had discovered a balding patch of ozone in the upper stratosphere, the size of the United States, over Antarctica.
Our use of certain chemicals threatens the ozone layer A massive ozone thinning over Antarctica during several months in 2009 Our use of certain chemicals threatens the ozone layer Why should we worry about ozone depletion?
What is Ozone? Ozone. is a molecule made of three oxygen atoms. What is the function of the ozone layer? ozone . absorbs ultraviolet solar radiation.
Title: The Ozone Layer Author: Sandra Inga Last modified by: Nicole Powell Created Date: 8/30/2010 12:45:45 AM Document presentation format: On-screen Show (4:3)
Ozone Depletion Reducing the manufacture and release of halogenated organic chemicals What are halogenated organic chemicals? CFCs Chlorofluorocarbons HCFCs Hydrochlorofluorocarbons CFCs Can (in some cases used to) be found in: Aerosol sprays Cleaning fluids Freezers Air conditioners ...
What is the Ozone Layer? Layer of ozone found in the stratosphere. Discovered in 1913 by French physicists . Charles Fabry and Henri Buisson. Ozone layer created by oxygen-ozone cycle
Erosion of Ozone Layer Erosion of Ozone layer Position of ozone layer : Ozone layer is mainly locate at height 20:40Km above sea level in the lower part of stratosphere layer .
Ozone Depletion Protest against ozone depletion http://archive.greenpeace.org/~ozone/gallery/sshow/sshow.html Video show Answer the questions on p. 1 Importance of the ozone layer Near ground level (trochosphere) - pollution Form photochemical smog and acid rain In the stratosphere (15 - 50 km ...
Ozone Depletion at the Poles What is ozone layer Ozone is a bluish, reactive gas, with chemical formula O3. Nearly 90% of the Earth’s ozone concentrates in the stratosphere.
The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere. The ozone layer prevents most UVB from reaching the ground. Ozone absorbs a band of ultraviolet radiation called UVB that is particularly harmful to living organisms.
The Ozone Layer Laura McManus What is the Ozone Layer? A region of the stratosphere Contains relatively high concentrations of ozone located at altitudes of 12-30 miles (19-48 km) above the Earth’s surface.
Ozone Layer Depletion IB SL What Is It? The ozone layer is found in the upper stratosphere and its primary function is to filter ultraviolet short-wave radiation that comes from the sun.
OZONE DEPLETION IS IT A SERIOUS THREAT? The Problem: An increase in Chlorofluorocarbons in the upper stratosphere will break down the existing ozone layer which protects life on earth from intense ultra violet rays.
OZONE and the ENVIRONMENT Just what is Ozone? Ozone is a form of oxygen with a different chemical property Ozone differs from oxygen: Has a distinctive odor Contains 3 oxygen atoms Absorbs damaging ultraviolet (UV) radiation In large concentrations ozone is hazardous Earth’s Atmosphere ...
The Ozone Layer and the Atmosphere By Alastair McNair The Structure of the Atmosphere What the atmosphere is made of The Thermosphere The thermosphere starts just above the mesosphere and extends to 600 kilometres (372 miles) high.
Ozone Layer. Layer in the lower stratosphere. Keeps 95% of harmful UV radiation away. Seasonal depletion of ozone layer above Arctic & Antarctic, overall thinning everywhere but tropics.
Title: The ozone hole Author: Billiet Last modified by: Burchill Created Date: 11/23/2007 4:33:08 PM Document presentation format: On-screen Show Other titles
The Ozone Layer. The ozone layer is a layer of gas present in an upper part of the atmosphere called the stratosphere; the stratosphere is roughly between 20-48km above sea level.
A tour of the ozone hole Courtesy of the Centre for Atmospheric Sciences, Cambridge University and www.solcomhouse.com plus Claire Cosgrove and Peter Webster (EAS)
Stratospheric Ozone Depletion, Ground-Level Ozone and the Electromagnetic Spectrum Electromagnetic Spectrum In our survey of the electromagnetic spectrum, note the great variance in wave frequencies and wavelengths as we move from the higher energy end (e.g., cosmic and X-rays) to the lower ...
Ozone Depletion Group 4 How Do We Know? Satellite Data Continued Background Information Photo-Dissociation How Ozone is Being Reduced Alternatives to CFCs The use of propane and 2-methyl propane as refrigerant coolants Although their use would reduce ozone depletion, both hydrocarbons are ...
O3 Ozone Depletion Ozone (O3) Absorbs harmful UV radiation from sun ozone is produced during lightning storms Chlorofluorocarbons (CFC’s) destroy ozone CFC’s production was banned in 1977 CFC’s “live” for hundreds of years Depletion of the Ozone Layer Freon (CFC ...
OZONE LAYER Aurora How does ozone interact with UV rays? What is UV light? Ozone filters UV Stratospheric ozone is a naturally-occurring gas that filters the sun's ultraviolet (UV) radiation.
What is the ozone layer? Most of the planet’s ozone hangs out in the Stratosphere, the layer above the Troposphere. What is the ozone layer? Ozone in the stratosphere protects people, animals, and plants from harmful ultraviolet rays.
Ozone Layer Depletion of ozone The initial step in the depletion of stratospheric ozone by human activities is the emission of ozone-depleting gases containing chlorine and bromine at Earth ’s surface.Most of these gases accumulate in the lower atmosphere.
The ozone layer, situated in the stratosphere about 15 to 30 km above the earth's surface. Ozone protects living organisms by absorbing harmful ultraviolet radiation (UVB) from the sun. The ozone layer is being destroyed by CFCs and other substances.
Without the Montreal Protocol, skin cancers would have been much worse It will take time for the ozone layer to recover. "Data Reporting and Access."
Title: OZONE LAYER & CFC’S Author: Cobb County School District Last modified by: install Created Date: 3/26/2008 9:09:23 AM Document presentation format
Ozone Depletion J(Hans) van Leeuwen ... (DU) If 100 DU of ozone were brought to the Earth's surface, it would form a layer 1 millimeter thick. In the tropics, ozone levels are typically between 250 and 300 DU year-round. In temperate regions, ...
The Ozone Story Presentation Ozone Secretariat UNEP (updated July 2003) Ozone Distribution in the Atmosphere Scientific Background I History 1839: Ozone discovered by C. F. Schönbein when observing electrical discharges. 1850s: Ozone shown to be a natural atmospheric constituent. 1880 ...
Ozone Depletion Chapter 13-2 Ozone layer A layer in the stratosphere that is made of ozone (O3) Absorbs ultraviolet light from the sun, protects organisms from damage to DNA, especially due to UVB Review: The atmosphere’s four layers CFCs Chlorofluorocarbons – man-made chemicals that were ...
Causes of Ozone Layer Depletion. The main cause of ozone layer depletion was the emission of CFCs (Chloroflurocarbons) containing chlorine. CFCs escape into the atmosphere from refrigeration and propellant devices and other chemical processes
The Ozone Shield The ozone layer is an area in the stratosphere where ozone is highly concentrated. It absorbs most of the UV rays from the sun.
Chapter 2: Protecting the Ozone Layer Why do we need to protect the ozone layer? Isn’t ozone hazardous to human health? Why is the ozone layer getting smaller?
Ozone Depletion O3 Ozone Factoids Good in the stratosphere, bad in the troposphere Produced at a height of ~50 km, settles to a height of 23 km Filters out 95 – 99% of incoming UV-A and UV-B (0.2m - 0.3m; m= 10-6m) Formation may be the mechanism that explains the warming trend in the ...
Ruin is the destination toward which all men rush…”(Hardin 1968, p. 41) Stratospheric Ozone Depletion Ozone layer shields Earth from UV rays Chemicals such as CFCs and halons release chlorine (CI) ...
Ozone Pollution Introduction Ozone Module Day 1 * * * * U.S. industrial revolution began after civil war – boom period between 1860-1890 * * * Several specific events both in the US and abroad have directly affected the history and policy of air conservation and air pollution control and ...
OZONE In 1994, the United Nations General Assembly voted to designate September 16 as "World Ozone Day", to commemorate the signing of the Montreal Protocol on that date in 1987.
Ozone Depletion. Ozone produced from the interaction of hydrocarbons and oxides in the presence of sunlight. At ground level, ozone is a pollutant; in the upper atmosphere it protects earth from excess radiation from sun
Ozone layer. A layer in the stratosphere that is made of ozone (O 3) Absorbs ultraviolet light from the sun, protects organisms from damage to DNA, especially due to UVB
Some kinds of environmental degradation are truly of global concern, such as Global Warming, Depletion of the Ozone Layer, Acid Rain, Pollution (Air, Water, Noise and Land), Urbanization, Deforestation, Soil Degradation, and so on. By survey of common man we found the reasons of env.
Tropospheric vs. Stratospheric Ozone. Tropospheric Ozone. Ground level ozone. Unstable. Reacts chemically with plants, rubber, and the tissues of living creatures – including you!
Ozone depletion Ozone is O3. Making styrofoam, air conditioners, and refrigerants releases CFC’s CFC’s “eat” the ozone ozone protects us from the UV radiation of the sun2wv
Alternatives and replacements for CFC’s with pros and cons. HCFCs (hydrochloroflurocarbons) Positive aspect -break down more quickly in the atmosphere posing less danger to the ozone layer
HOLE IN OZONE LAYER EXPOSED A CITY THE ASSOCIATED PRESS 10-6-00 WELLINGTON, New Zealand – “The hole in the ozone layer over Antarctica stretched over a Chilean city when it ballooned to a record size last month, the ...
By Jordan Watt More Info About the Ozone Layer Antarctic Ozone Layer Credits References More Info About the Ozone Layer Antarctic Ozone Layer Credits References What is the ozone layer?
The ozone hole is the general thinning of the ozone layer in the stratosphere, which occurs mainly in the spring, over the polar regions. The decrease, that has begun to study from 1979, can be up to 70% in the Antarctic and 40% in the area of the Arctic.