Why is the hole in ozone layer forming over Antarctica?

Question

Antarctica is uninhabited and most of the indrustries are over 2 nortern hemisphere and if it has something to do with the poles it should be over north pole

Answer 1

When the topic of the ozone layer arises, many people immediately think of the hole over Antarctica, but few know why the hole is actually there. In 1985, British scientists discovered this hole. A special condition exists in Antarctica that accelerates the depletion of the ozone layer. Every Arctic winter, a polar vortex forms over Antarctica. A polar vortex is �a swirling mass of very cold, stagnant air surrounded by strong westerly winds� (Roan, 126). Since there is an absence of sun during Arctic winters, the air becomes incredibly cold and the formation of ice clouds occurs. When the sun returns in the spring, the light shining on the nitrogen oxide filled ice particles activates the formation of chlorine. This excess of ozone destroying chlorine rapidly accelerates the depletion of the ozone layer. Finally, when the polar vortex breaks up, the rapid dissolution decreases. It is evident that the effects of the polar vortex are dramatic. �For about two month every southern spring, the total ozone declines by about 60% over most of Antarctica. In the core of the ozone hole, more than 75% of the ozone is lost and at some altitudes, the ozone virtually disappeared in October, 1993� (Nilsson, 19). The average size of the ozone hole is larger than most continents, including South America, Europe, Australia, and Antarctica, and the maximum size of the ozone hole in 1996 was larger than North America (See Figure 5). Finally, one must note that the �hole� over Antarctica is truly a �hole� only in the Antarctic spring, when the depletion is extremely severe due to the vortex.
The hole above Antarctica has clearly proven to be detrimental. Plankton, organisms that live on carbon, light, and nutrients such as nitrogen, are near the bottom of the food chain, and are accustomed to low levels of UV. In December of 1994, on the island of Bacharcaise off Antarctica, increased levels of UV radiation decreased the number of photoplankton dramatically. Photoplankton are the main source of food for krill, which in turn are the main source of food for various birds and whales in the Antarctic region
At this time, due to the decreased number of photoplankton, the krill level was so low that it could not support the penguin population. Thus, some penguins were forced to travel up to two hundred miles in search of food, but most returned with none. Furthermore, when summer came, only approximately ten of the 1800 hatched penguin chicks survived. This tragedy illustrates the fact that even underwater creatures are not protected from harmful UV rays, and is a perfect example of the entire food chain being affected due to an increase in the UV radiation as a result of the thinning ozone layer.

Answer 2

The ozone layer is created when the solar wind collides with the earth's magnetic field. There are the beta particles that are attracted to the north pole and make it negative. then the Alpha particles are attracted to the south pole and that makes it positive. The hole is more pronounced in the south because the Alpha particle has much more mass. The hole occurs like a particle gun that blows the hole in the ozone layer and when in the north u see the northern lights.

Answer 3

people of many countries conducted the nuclear tests on antarctica.the citizens of many countries including india selected a part of the continent &said that this is mine and i will use it for my nuclear tests.the tests were conducted in this place since years.therefore there is air pollution in that place dye to release of CFCs and oxides which reacted with the ozone layer as they went up.as a result of which the ozone layer is getting depleted and Australia is yet another country which is facing this problem.it understood the need of this layer qnd the world govt. has banned nuclear tests any where on the earth.

Answer 4

It is formed due to the phenomenon of greenhouse effect and global warming.