Why is Ozone hole above single area of earth? Why that area?

Asked by: Joel Rindfleisch

Why is the ozone hole found over Earth’s pole?

The Antarctic ozone hole forms during the Southern Hemisphere’s late winter as the returning Sun’s rays start ozone-depleting reactions. Cold winter temperatures persisting into the spring enable the ozone depletion process, which is why the “hole” forms over Antarctica.

Why is an ozone hole formed only above Antarctica?

The severe depletion of the Antarctic ozone layer known as the “ozone hole” occurs because of the special atmospheric and chemical conditions that exist there and nowhere else on the globe. The very low winter temperatures in the Antarctic stratosphere cause polar stratospheric clouds (PSCs) to form.

Where is the ozone hole above?

Antarctica

What we call the ozone hole is a thinning of the protective ozone layer in the stratosphere (the upper layer of Earth’s atmosphere) above Antarctica that begins every September. Chlorine and bromine derived from human-produced compounds are released from reactions on high-altitude polar clouds.

What is an ozone hole Class 7?

Notes:Ozone hole is formed due to depletion of the ozone layer and this depletion is due to gases like CFCs (Chlorofluorocarbons), CCl4 (carbon tetrachloride), and CF4 (carbon tetrafluoride). These gases break down the ozone (O3) molecules thus depleting the ozone, leading to the thinning of the ozone layer.

Why is there a hole in the ozone layer above Australia?

The stratospheric ozone layer absorbs the biologically damaging wavelengths of ultraviolet (UV) rays but in the 1970s, Australia’s ozone layer was severely thinned as a consequence of heavy use of ozone-depleting, substances such as chloroflurocarbons (CFCs) and hydro-chloroflurocarbons (HCFCs).

When was ozone hole first discovered?

1985

In 1985 Jonathan Shanklin was a junior researcher at BAS when he discovered a hole in the invisible shield that protects us from solar radiation. We catch up with him to learn about his work and how it has made a difference. It’s 36 years since scientists first discovered the hole in the ozone layer.

What is ozone hole short answer?

The term ‘ozone hole’ refers to the depletion of the protective ozone layer in the upper atmosphere (stratosphere) over Earth’s polar regions.

What is ozone hole Class 9?

The ozone hole is the depletion of the ozone layer. The ozone layer absorbs the harmful UV rays coming from the sun and therefore does not allow those rays to reach Earth’s surface. Consequences of ozone depletion: Due to its depletion, more radiation enters the Earth’s atmosphere.

What is ozone hole Class 10?

The increase in heat and depletion of ozone around the Earth’s Polar Regions is called the ozone hole. Chlorine from the CFCs acts as a catalyst and initiates the breakdown of ozone. It combines with the nascent oxygen formed and destroys the ozone cycle.

Which country has no ozone layer?

Antarctica, where ozone depletion has been most severe due to very low temperatures is expected to recover much more slowly.

Which country has the biggest hole in the ozone layer?

Ozone hole over Antarctica is one of the biggest in 15 years

• According to the World Meteorological Organization, the ozone layer hole over Antarctica is one of the largest and deepest in the past 15 years.
• The hole peaked at 24 million square kilometers (approximately 9.3 million square miles).

What is ozone layer for Class 6?

What is the Ozone Layer? The ozone layer is the layer present in the Stratosphere. It absorbs the harmful ultraviolet rays that come from the sun. Moreover, it causes harmful radiation that has a high concentration of ozone (O3) which is harmful to living beings on the earth.

Why is the hole in the ozone greatest over Antarctica quizlet?

Why is the hole in the ozone greatest over Antarctica? Chlorine freed from CFC’s elsewhere migrate to the Antarctic region, where they are trapped by the polar vortex. Which of the following is true of the ionosphere? The region principally absorbs gamma rays, x-rays, and interacts with the solar wind.

Is ozone also depleted over the North Pole?

Summary: Researchers have established that the destruction of ozone over the Arctic in the spring causes abnormal weather throughout the northern hemisphere, with many places being warmer and drier than average — or too wet.

Why do ozone holes appear in polar regions during springtime?

19. Ozone holes appear in polar regions during springtime when ozone-destroying a. chlorine atoms are released from polar stratospheric clouds.

What is special about the South Pole versus the North Pole that leads to ozone depletion?

Ozone losses in the Northern Hemisphere are lower than in the Southern because warmer Arctic temperatures limit the formation of polar stratospheric clouds that destroy ozone. But temperatures in the stratosphere, high above the Arctic, have gradually cooled over the last decade, resulting in increased ozone loss.

Which part of Earth has the most severe ozone layer depletion?

Antarctica

Antarctica, where ozone depletion has been most severe due to very low temperatures is expected to recover much more slowly.

Why is ozone layer loss more in cold regions?

Low temperatures give rise to a special kind of clouds, so-called polar stratospheric clouds (PSCs). On the surface of these cloud particles, chemical reactions take place that convert innocuous halogen compounds into active chlorine (ClO) that is very efficient at destroying ozone.