Ozone Layer PPT
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
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 ...
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.
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.
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)
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.
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 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 ...
Stratospheric Ozone Depletion, Ground-Level Ozone and the Electromagnetic Spectrum Wave Characteristics Important relationship: the higher a wave’s frequency, the greater its impact or penetration energy and the shorter its wavelength Compare two wave examples drawn on board - which has the ...
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 ...
What is Surface Ozone? Ozone occurs naturally in Earth’s atmosphere wherever sunlight or chemical reactions break apart oxygen molecules (O2)
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.
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
The Ozone Layer. Most people would say that, the ozone is not even needed, that the ozone is only a small useless layer. Sure it’s useless, if you enjoy skin cancer and being burned to death.
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.
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 ...
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?
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 (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 ...
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.
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
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)
Aim: Learn about causes and effects of ozone depletion New words: ozone, ozone layer, troposphere, stratosphere, U.V. (ultraviolet radiation) Do Now:
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
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 ...
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."
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.
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.
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.
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.
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
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 ...
WHAT IS THE OZONE HOLE? The ozone hole is the general thinning of the ozone layer in the stratosphere, which occurs mainly in the spring, over the polar regions.
Ozone The Problem: The Disappearing Antarctic Ozone Layer: A Springtime Feature 2006: The worst The Culprits: Chlorofluoromenthanes The Ozone Layer was Disappearing Much Faster than Expected.
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, ...
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 ...
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 ...
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?
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.
Tropospheric vs. Stratospheric Ozone. Tropospheric Ozone. Ground level ozone. Unstable. Reacts chemically with plants, rubber, and the tissues of living creatures – including you!
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.
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
Relationship between changes in oxygen concentration and the development of the ozone layer. 3500mya Cyanobacteria (photosynthetic) began producing molecular oxygen.
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 Loss and Skin Cancer Problem 1986 - Susan Solomon found the correlation between the disappearance of ozone and increased concentration of chloroflurocarbons (CFC’s) CFC’s Refrigerants popularized in industry during the 1950’s During the winter months concentrates in the South Pole ...
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 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 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
What is “good” and “bad” ozone? Ozone occurs in two layers of the atmosphere. The layer surrounding the earth's surface is the troposphere.