Why the ozone layer is more depleted over antartica where there is no pollution?
345675
The Recipe For Ozone Loss\n\nTo summarise then, we have looked at the 'ingredients' or conditions necessary for the destruction of ozone that we see in Antarctica. The same applies more or less to the loss of ozone in the Arctic stratosphere during winter. Although in this case the loss is not nearly so severe.\n\nTo recap then, the requirements for ozone loss are:\n\nThe polar winter leads to the formation of the polar vortex which isolates the air within it.\n\nCold temperatures form inside the vortex; cold enough for the formation of Polar Stratospheric Clouds (PSCs). As the vortex air is isolated, the cold temperatures and the PSCs persist.\n\nOnce the PSCs form, heterogeneous reactions take place and convert the inactive chlorine and bromine reservoirs to more active forms of chlorine and bromine.\n\nNo ozone loss occurs until sunlight returns to the air inside the polar vortex and allows the production of active chlorine and initiates the catalytic ozone destruction cycles. Ozone loss is rapid. The ozone hole currently covers a geographic region a little bigger than Antarctica and extends nearly 10km in altitude in the lower stratosphere.
545797
Posts here are generally on the right path.\nThe ozone hole is actually a NATURAL phenomena.  It occurs every year over Antarctica because of the cold weather and circulation patterns there.\n\nHowever, the hole was shown to be getting larger the past few decades.  This is primarily due to the use of Chloroflorocarbons... propellants in spray cans.  As most of the world has found replacements and usage has dropped, the damage is beginning to decrease.  However, CFCS have a resident time in the atmosphere of about a century... so it is believed the effects will continue to linger for a while before relaxing.\n\nI just found this link:\nhttp://ozonewatch.gsfc.nasa.gov/\nwhich allows you to keep tabs on the current hole and see how it compares to previous years.  It appears the area of the hole has grown larger the past few decades... but the intensity of the minimum has decreased.  So it depends upon how you look at it!\n\nWish you well,\nGod bless,\nShane
443894
an ice age increases the coverage of ice on the planet which obviously makes it colder.. but also means that radiation from the sun is reflected back into the atmosphere making it cooler again and perpetuating the ice age. precipitation also decreases, ie it rains and snows less (antartica is the driest continent in the world). wind is produced by air currents which are created by warm air rising in various patterns around the globe, so wind patterns would alter which would also affect the climate. additionally ocean currents would be altered by the increase of ice and colder waters, which would again alter the climates in maritime areas
768729
This is an interesting but certainly not simple question. Ozone is formed naturally in the stratosphere as O2 molecules absorb UV light and break down to O radicals. These O radicals then react with O2 molecules and collide with another third body to remove excess energy to form O3 molecule.\n\nO2 + hv → 2 O\nO + O2 +M → O3 + M\n\nThese O3 molecules in the stratosphere is considered as our friend because they absorb most of the harmful UV radiation so that we will not be exposed to that. \n\nMore and more studies have shown that our stratospheric ozone is decreasing. This is due to the CFCs that we used long time ago. These CFCs was used heavily long time ago because of its high vapor pressure property. For example, it can be used as fire extinguishants, propellants, and solvents. One problem about these molecules is that they are very non-reactive in the lower atmosphere. As a result, they accumulate in the atmosphere and until they diffuse to the upper atmosphere, where the strong UV can break them down. As these CFCs react with strong UV and form Cl radicals, these Cl radicals undergo a "chain reaction" to destroy our ozone. As you may imagine from the name, each Cl radicals can effectively destroy many ozone molecules before it reacts with something else and be removed. So, only a very small amount is enough to destroy lots of ozone. CFCs have been banned long time ago, but because of its non-reactive property, the ozone hole problem that we are having today is caused by yesterday's CFCs.\n\nOzone in the lower troposphere, on the other hand, is considered as pollutants. It is because these ozone can react with many hydrocarbon in the presence of sunlight to generate smog (which is also called photochemical smog because they are generated in the presence of solar radiation). These smog not only reduce our visibility, they also irritate our respiratory systems. High concentration of ozone can also cause lots of damage to vegetation.\n\nThese lower tropospheric ozone is formed mostly due to reaction of NOx (NO and NO2) with sunlight in the presence of some hydrocarbons. As you may know, the vehicle emission contains lots of NOx, which is one of the reason for causing the tropospheric ozone.
532115
ozone is one of the gases in our atmosphere.\n\nit protects us from some of the more poisonous rays of the sun - radiation that is very harmful to life on earth.\n\nOzone is exactly half of Oxygen, meaning oxygen always has two atoms stuck together, ozone only has one.\n\nIf the ozone layer goes, we will all die of cancer faster than you can imagine, among other gross diseases and starvation (coz food won't grow with all that poisonous radiation).\n\nIn australia, more ppl get skin cancer than anywhere else, because there is a huge hole in the ozone layer right on top of australia.\n\nDo you know that smell that comes when lightning strikes right before a delicious thunderstorm?? There is this yummy smell in the air - that's ozone you're smelling. The lightning (electricity basically) splits the oxygen molecules in the air - this is ozone.
236055
The southern hemisphere has the biggest problem with ozone depletion because winter temperatures in the stratosphere create a global vortex that traps elemental chlorine over Antarctica, leading to a seasonal depletion and rebuilding of molecular ozone over the same area - The ozone hole is seasonal, not constant, and observations show it is recovering from its lowest recorded ozone levels. During southern hemisphere winters, the thinned ozone areas surrounding the lower latitudes can cause South America, Australia, New Zealand, and other land areas in those higher southern latitudes to experience excess solar UVA and UVB incidence.
684212
the weather is pretty cold because it it far from the sun.It's temperature is -214 C.Its atmosphere is mainly made of hydrogen and methane gas.It has seasons different from us because it is tipped over its side
259202
Here is a link that might help.  It is part of a general page on the Ozone Layer...\n\nhttp://en.wikipedia.org/wiki/Ozone_layer#Ozone_depletion\n\nhttp://en.wikipedia.org/wiki/Ozone_layer
591984
It gets colder as you go up through the troposphere because the air is "thinner".\n\nThere is less atmosphere here due to less gravity.\n\nB/c there is less air, there will be less heat. Air is an insulator that holds heat. Less air = less heat.\n\n:)
139411
Because, when used, the CFC is broken apart by ultraviolet radiation releasing a free chlorine atom. This atom will enter the ozone layer and "steel" an oxygen atom from an ozone(O3) molecule. The O2 left over enters the atmosphere as normal oxygen gas. The chlorine atom from the Cl-O molecule then separates to go break up other ozone molecules.\nThis may seem like no big deal, but if many CFCs are released and left in the ozone for a long time, many ozone molecules are destroyed.  The CFCs remain in the atmosphere for many many years.
668088
it is a little of both. yes the earth has heated but weather goes in circular movement. so there are periods of time when the earth heats up and then cools down. yes we are polluting the air and are loosing ozone, but the biggest factor is from methane gas produced by farm animals. we (Christians) are suppose to be good Stewart's of Gods gifts to us. so we need to learn to recycle, conserve and use the planet wisely. one of the things that would help the most is just planting trees. have an cooling effect on earth.
387707
Temperature decreases w/ height as you move up through the troposphere b/c of a decrease in air pressure.\n\nAir pressure steadily declines as you move up b/c there is less gravity. Since gravity acts on everything that has mass, including air, it holds most of the earth's air close to the ground. Air acts as an insulator or blanket, absorbing long wave radiation reradiated from the earth. When you move upward away from the surface, the air thins out. There is less air to hold heat.\n\nHowever, once you leave the troposphere, you enter the stratosphere. Here the temps steadily increase due to the presence of the ozone layer. The ozone traps heat.\n\nAs you move away from the stratosphere you will enter the mesosphere where temps decrease again due to less air & movement away from the ozone layer.\n\nAs you go even higher & enter the Thermosphere, the temps increase again b/c solar radiation is so intense that the few air particles that are present are super heated. The chances of being burned are slight to none b/c the air particles are few & far between. After all that is what is holding the actual heat.
1038313
Earth...It has plenty of Atmosphere, Might have a little Co2 in it but, just plain oxygen.
1095694
The air around the planet is a viscous fluid and will travel with the rotation of the earth.  This does not take into accounts things such as wind currents or the jet stream which are different things.  There is a little bit of lag in the higher altitudes but its negligible
168302
Because they deplete the ozone layer.
1079707
You had better not TOUCH my freon guage.\n\nBtw... freon is seldom used anymore since it has been identified as a polutant responsible for ozone depletion.
1051172
Actually, the Ozone is starting to recover.  There was an 8% increase compared to what is was 20 years ago.  Society needs to be encouraged to continue reducing emissions and recycling what they can.