The ozone hole isn't in Australia; it forms annually over Antarctica, but its edges can sometimes drift over southern parts of Australia and New Zealand during early summer, causing temporary increases in UV radiation, although Australia's thinner ozone layer overall leads to higher UV levels anyway. The main Antarctic hole stays near the South Pole due to the polar vortex, but its breakup can affect nearby regions, and smoke from major fires (like Australia's Black Summer) can temporarily worsen thinning.
Though sun damage is a concern, the ozone hole has never reached Australia. And contrary to another popular belief - it is not a hole that exists all year round. The ozone hole forms and disappears on an annual basis in springtime over Antarctica.
Yes, Australia has some of the world's highest UV Index levels, often reaching "extreme" (11+) in summer due to its proximity to the equator, clear skies, and Earth's orbit placing it closer to the sun during Southern Hemisphere summer, leading to high skin cancer rates. While other equatorial regions also have high UV, Australia's combination of factors makes its sun particularly harsh, requiring sun protection year-round when the index is 3 or above.
This chlorine and bromine activation then leads to rapid ozone loss when sunlight returns to Antarctica in September and October of each year, which then results in the Antarctic ozone hole.
The earth's orbit around the sun is not perfect. So when it's summer in Australia we're actually a little bit closer to the sun compared to when it's summer in Europe. In fact it's actually 10% worse UV in Australia when it is summer in the respectives Hemisphere.
Australia is unlikely to become entirely uninhabitable soon, but climate change is making large areas, especially in the north, extremely hot and potentially unlivable under higher warming scenarios (around 3°C), straining infrastructure, impacting agriculture, and displacing vulnerable populations, while coastal areas face rising sea levels and severe erosion, making parts of cities and towns uninsurable and at risk. The primary threats are extreme heatwaves, bushfires, droughts, floods, and sea-level rise, disproportionately affecting regional, Indigenous, and disadvantaged communities, forcing significant adaptation and threatening the nation's food security.
Countries near the equator, especially in high-altitude regions of South America (Bolivia, Peru, Chile), and also places like Australia (Queensland), Kenya, and Madagascar, experience the world's highest UV Index, with factors like thin air, proximity to the equator, and clear skies contributing to intense, direct sunlight.
The 10 countries with the highest average ozone exposures in 2019 were in Asia and the Middle East. They include Qatar, Nepal, India, Bangladesh, Bahrain, Pakistan, Kuwait, the Islamic Republic of Iraq, the Republic of Korea, and Saudi Arabia.
🇦🇶 The 2025 Antarctic ozone hole closed on 1 December, marking the earliest closure since 2019. This year's ozone hole was also relatively small for the second consecutive year, especially when compared to the larger and more persistent ozone holes observed between 2020 and 2023.
Human activities cause the emission of halogen source gases that contain chlorine and bromine atoms. These emissions into the atmosphere ultimately lead to stratospheric ozone depletion. The source gases that con- tain only carbon, chlorine, and fluorine are called “chlo- rofluorocarbons,” usually abbreviated as CFCs.
Due to its geographical location and close proximity to the equator, Australia experiences some of the highest levels of solar UVR in the world. The earth's elliptical orbit brings the earth closer to the sun in January, during summer in the southern hemisphere, resulting in higher levels of UVR.
The lowest values occur in June-July where the UV Index averages less than 2 over Tasmania, increasing to almost 8-9 in far northern Australia.
The most intense sunlight on Earth can be found in the Atacama Desert.
While the majority of these pollutants achieve Australia's NEPM standards most of the time, particulate matter and ozone most frequently exceed the country's standards for 24-hour exposure. Therefore, PM and ozone are Australia's main pollutants of concern; although of these, PM2.
As one of the handful of countries in the southern hemisphere that lies in proximity to Antarctica, New Zealand is collateral damage. The lack of ozone perhaps makes this next fact unsurprising: New Zealand has one of the highest incidence rates of skin cancer in the world.
If current policies remain in place, the ozone layer is expected to recover to 1980 values (before the appearance of the ozone hole) by around 2066 over the Antarctic, by 2045 over the Arctic and by 2040 for the rest of the world, according to the most recent assessment in 2022.
A diminished ozone layer allows more UV radiation to reach the Earth's surface. For people, overexposure to UV rays can lead to skin cancer, cataracts, and weakened immune systems. Increased UV can also lead to reduced crop yield and disruptions in the marine food chain.
While the ozone layer hole is healing and on the path to recovery by 2060, currently measuring about 7.6 million square miles, wildfire smoke from Australia's Black Summer has destroyed 1% of the ozone layer, a recent assessment found.
A hole that opens annually in the ozone layer over Earth's southern pole was relatively small in 2024 compared to other years. Scientists with NASA and the National Oceanic and Atmospheric Administration (NOAA) project the ozone layer could fully recover by 2066.
Bangladesh is frequently cited as the world's most polluted country based on average annual PM2.5 (fine particulate matter) levels, followed closely by Pakistan and India, with high concentrations driven by vehicle emissions, industrial output, and construction, though Chad sometimes tops the list in specific reports, highlighting ongoing severe air quality challenges in South Asia and parts of Africa.
Ozone layer could 'fully recover' by 2066. Healing continues in the atmosphere over the Antarctic: A hole that opens annually in the ozone layer over Earth's southern pole was relatively small in 2024 compared to other years. NOAA and NASA scientists project the ozone layer could fully recover by 2066.
There is seasonal variation in the ozone layer over New Zealand. The ozone layer is thickest during spring and thinnest during autumn.
Australia has some of the highest levels of UV radiation in the world –in fact, just 15 minutes of unprotected exposure (when the UV levels are 3 or above) is enough to start to cause damage to your skin. UV radiation from the sun is also one of the best natural sources for vitamin D so a balance is important.
Unbleached cotton contains natural lignins that act as UV absorbers. Shiny polyesters and even lightweight satiny silks can be highly protective because they reflect radiation. High-tech fabrics treated with chemical UV absorbers or dyes prevent some penetration from UV rays. Fit: Loose-fitting apparel is preferable.
Melanin offers only minimal UV protection. Even after your skin darkens, a tan provides the equivalent of about 2-4 Sun Protection Factor (SPF), much lower than dermatologists recommend for daily sun exposure.