2 edition of Why Does the Ozone Hole Form? (Chemconnections) found in the catalog.
Why Does the Ozone Hole Form? (Chemconnections)
February 27, 2003
by John Wiley & Sons Inc
Written in English
|The Physical Object|
Why does the stratosphere increase in temp. as altitude increase? Where and when does this hole form? Antarctic and southern hemisphere in spring (August-October) What happens over the Antarctic regarding the polar vortex that contributes to the ozone hole? There is a circling whirlpool of polat stratospheric winds. When did the DU start? Ozone (O 3) in the troposphere—the atmosphere's lowest layer—is termed "bad ozone" because elevated levels lead to human health problems as .
One of the greatest and most dangerous effects of pollution on the ozone layer is that it creates holes in the atmosphere, which allow powerful ultraviolet rays from the sun to reach the Earth’s surface. Many varieties of atmospheric pollutants — toxic chemicals, synthetic substances, such as DDT, and manmade chemicals — enter the atmosphere. The term "ozone depletion" means more than just the natural destruction of ozone, it means that ozone loss is exceeding ozone creation. Think again of the "leaky bucket." Putting additional ozone-destroying compounds such as CFCs into the atmosphere is like increasing the size of the holes in Author: Steve Graham.
The 'ozone hole' is a slangy expression meaning a dip in the amount of total ozone above Antarctica. The low value of ozone is because certain manmade chemicals hover in the higher regions of the atmosphere above earth and 'eat' the ozone. Loss of ozone causes some extra heat to be retained but not a lot compared to greenhouse gases. What’s more, the size of the resulting ozone “hole” each year can vary greatly, depending on factors such as the temperature in the stratosphere. The colder it is, the more ozone gets destroyed.
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Ozone hole facts. These reactions convert the inactive chlorine reservoir chemicals into more active forms, especially chlorine gas (Cl 2).When the sunlight returns to the South Pole in October, UV light rapidly breaks the bond between the two chlorine atoms, releasing free chlorine into the stratosphere, where it takes part in reactions that destroy ozone molecules while regenerating the.
ChemConnections: Why Does the Ozone Hole Form. (ChemConnections) [Sharon Anthony, Tricia Ferrett] on *FREE* shipping on qualifying offers. Students learn about the structure of the atmosphere and the oxygen chemistry responsible for producing the ozone layer. Rowland and Molina’s two-step chlorine-catalyzed cycle.
This makes the area especially susceptible to ozone depletion. When sun hits PSCs in early spring, large amounts of chlorine monoxide form from the substances that contain chlorine.
Fortunately, by early summer, ozone from other areas comes in to help fill this hole [source: Fahey]. But because of our CFC production, the hole returns each : Jane Mcgrath. In the early s, scientists began to realize that CFCs were creating a thin spot—a hole—in the ozone layer over Antarctica every spring.
This series of satellite images shows the ozone hole on the day of its maximum depth each year from through Ozone is naturally created when UV radiation hits oxygen gas molecules (O 2) and breaks some of them apart into single oxygen atoms. These single atoms of oxygen then bond with other O 2 gas molecules, forming O 3.
In a similar reaction, O 3 molecules can be broken down into atoms of O and molecules of O 2. In this way, ozone, oxygen gas, and. The Earth's ozone layer ozone layerThe region of the stratosphere containing the bulk of atmospheric ozone. The ozone layer lies approximately kilometers ( miles) above the Why Does the Ozone Hole Form?
book surface, in the stratosphere. Depletion of this layer by ozone depleting substances (ODS) will lead to higher UVB levels, which in turn will cause increased skin cancers and cataracts and potential damage. The ozone hole isn't actually a "hole" in the literal sense, but rather more of a wearing thin of the normal ozone levels.
It is defined by the scientific community as anywhere in which the amount of column ozone in the atmosphere is under Dobson Units. Ozone layer is depleted by the chlorine present in Chloroflurocarbon (CFC). It is widely believed that CFC is emitted by the refrigerant used for cooling.
However CFC is present all our Earth's atmosphere and even in lower stratosphere. Ozone hole. The ozone hole is caused by the effect of pollutants in the atmosphere destroying stratospheric ozone.
During the Antarctic winter something special happens to the Antarctic weather. Firstly, strong circular winds form that blow around the whole continent, this is known as the "polar vortex" - this isolates the air over Antarctica from the rest. To mark the peak of ozone hole season, we're highlighting four ways that climate and the ozone hole are related—and one important way they aren't.
But before you read any further, please take a Author: Rebecca Lindsey. PSCs form more readily in the extreme cold of the Arctic and Antarctic stratosphere. This is why ozone holes first formed, and are deeper, over Antarctica.
Early models failed to take PSCs into account and predicted a gradual global depletion, which is why the sudden Antarctic ozone hole was such a surprise to many scientists.
This module is driven by the question, "Why does the ozone hole form in the Antarctic Spring?" Students will use the world wide web to learn about the structure of the atmosphere and the ozone layer, when the ozone hole is formed, and its current status.
The oxygen chemistry which "naturally" makes and destroys ozone will be covered, along with. The ozone hole season is past its peak and ozone levels over Antarctica are slowly rising, with the ozone hole slowly shrinking.
The polar vortex has been very stable throughout the season, however the final spring warming is expected towards the end of the month. Ozone gas is continuously formed by the action of UV rays on molecular oxygen, and also degraded into molecular oxygen in stratosphere.
There should be a balance between production and degradation of ozone in stratosphere. Of late, the balance has. Fueled in part by fears of the ozone hole worsening, 24 nations signed the Montreal Protocol limiting the use of CFCs in These days, scientists understand a lot Author: Erin Blakemore.
The gaping hole in the ozone layer of the atmosphere over the Antarctic was caused primarily by high concentrations of ozone-depleting chemicals called CFCs.
The vast hole in the ozone was discovered by scientists in the s, who upon discovering the dramatic loss. Buy Why Does the Ozone Hole Form. (Chemconnections) by Moore, Bradley (ISBN: ) from Amazon's Book Store. Everyday low prices and free delivery on eligible : Bradley Moore.
Ozone Hole History Ozone Creation One billion years ago, early aquatic organisms called blue-green algae began using energy from the Sun to split molecules of H2O and CO2 and recombine them into organic compounds and molecular oxygen (O2).
About 90% of the ozone in the Earth's atmosphere is found in the region called the is the atmospheric layer between 16 and 48 kilometers (10 and 30 miles) above the Earth's surface. Ozone forms a kind of layer in the stratosphere, where it is more concentrated than anywhere else. Ozone and oxygen molecules in the stratosphere absorb ultraviolet light from the Sun, providing.
The ozone hole occurs in a polar region, where Total Column Ozone levels drop to below Dobson units. The Southern polar hole was about nominal for the last 20 years. The ozone hole forms because: ozone is unstable - over the winter, the budget of.
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Free shipping for many products! Technically a substantial thinning of the ozone layer, the ozone "hole" has been opening every spring since the s, the scientists reported. Their data, collected at the Halley Research Station.Ozone is a molecule made of 3 oxygen atoms.
It is formed by the action of UV light on Oxygen high up in the upper atmosphere. Ozone filters out UV light from reaching the surface of the earth and.