In what season in the Antarctic is the ozone hole largest?

In what season in the Antarctic is the ozone hole largest?

spring season
During the Southern Hemisphere spring season (August – October) the ozone hole over the Antarctic increases in size, reaching a maximum between mid-September and mid-October.

During what months do the highest values of ozone occur over the Antarctic?

The ozone hole now occurs every year in Antarctica between the months of September and November, which is the South Pole’s springtime. During this time, ozone levels over most of Antarctica are reduced by about 60% of their usual amount.

When did the ozone hole form?

But in the early 1980s, through a combination of ground-based and satellite measurements, scientists began to realize that Earth’s natural sunscreen was thinning dramatically over the South Pole each spring. This thinning of the ozone layer over Antarctica came to be known as the ozone hole.

Where is the largest ozone hole located?

The 2020 Antarctic ozone hole grew rapidly from mid-August and peaked at around 24.8 million square kilometres on 20 September 2020, spreading over most of the Antarctic continent. It was the longest-lasting and one of the largest and deepest holes since the ozone layer monitoring began 40 years ago.

Is the ozone hole permanent?

Scientists have found evidence that the hole in the ozone layer over Antarctica is finally beginning to heal. If progress continues, it should be closed permanently by 2050.

Where is the ozone layer strongest?

Sources. About 90 percent of the ozone in the atmosphere is contained in the stratosphere. Ozone concentrations are greatest between about 20 and 40 kilometres (66,000 and 131,000 ft), where they range from about 2 to 8 parts per million.

Is the Ozone Hole permanent?

Which country has the biggest hole in the ozone layer?

A NASA instrument has detected an Antarctic ozone “hole” (what scientists call an “ozone depletion area”) that is three times larger than the entire land mass of the United States—the largest such area ever observed.

Where is 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).

Why is there no ozone layer in Australia?

The ozone layer is depleted in two ways. Firstly, the ozone layer in the mid-latitude (e.g. over Australia) is thinned, leading to more UV radiation reaching the earth. Secondly, the ozone layer over the Antarctic, and to a lesser extent the Arctic, is dramatically thinned in spring, leading to an ‘ozone hole’.

How bad is the ozone layer 2020?

For much of the 2020 season, stratospheric ozone concentrations around 20 to 25 km of altitude (50-100hPa) reached near-zero values with the ozone layer depth as low as 94 Dobson Units (a unit of measurement), or approximately one third of its normal value.

How does ozone layer get damaged?

Ozone Depletion. When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules. One chlorine atom can destroy over 100,000 ozone molecules before it is removed from the stratosphere. When they break down, they release chlorine or bromine atoms, which then deplete ozone.