Why is UV so high in Australia?

During summer, the Earth’s orbit brings Australia closer to the sun (as compared to Europe during its summer), resulting in an additional 7% solar UV intensity. Coupled with our clearer atmospheric conditions, this means that Australians are exposed to up to 15% more UV than Europeans.

What is the highest UV index in Australia?

The UV Index at solar noon is generally in the range 0-12 and values above 11 are considered extreme. In Australia, peak daily values in summer are regularly in excess of 12-14, and can reach 16-17 at more northern latitudes. When the forecast UV Index is ≥3, sun protection is required.

Which country has the highest UV levels?

Summertime UV levels are higher in New Zealand than at similar latitudes in the northern hemisphere [2]. However, other countries in the southern hemisphere have higher UV levels than New Zealand. The following countries have higher UV levels: Peru, Bolivia, Chile and Argentina [3].

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What factors affect the UV level across Australia?

Factors such as latitude, ozone, cloud, reflection from surfaces, time of year and time of day determine UV levels. UV levels vary in intensity and level across Australia on any given day. When the UV Index reaches 3, sensible sun protection is warranted and is unlikely to put people at risk of Vitamin D deficiency.

Is the sun stronger in New Zealand than Australia?

In terms of energy, the sun is stronger in Australia due to it being closer to the equator. But in terms of UV light which causes sunburn, it is stronger in New Zealand due to a thinner ozone layer, and less pollution (clearer air).

Why is there no ozone layer in 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).

What is the most dangerous UV index?

8 to 10: Very High

A UV Index reading of 8 to 10 means very high risk of harm from unprotected sun exposure. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly.

Which country has the harshest sun?

New Zealand now has the highest rate of melanoma skin cancer in the world – eclipsing Australia as the most dangerous place to be exposed to the sun. New research published in the Journal of Investigative Dermatology has found New Zealand has 50 cases of melanoma per 100,000 people, compared with Australia’s 48.

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What UV level is safe?

UVI 1-2 is low, which generally means it’s safe to be outdoors unprotected. Other classifications are moderate (3-5), high (6-7), very high (8-10) and extreme (11+). To some extent, the moderate to very high labels tell us little except that UV intensity is increasing.

What is the highest UV ever recorded?

On Dec. 29, 2003, a world-record UV index of 43.3 was detected at Bolivia’s Licancabur volcano. The UV index is used to forecast the strength of the sun’s ultraviolet rays.

Is Australian sun stronger?

UV radiation is the strongest around noon; the sun gives off its strongest light from 10:00 a.m. to 3:00 p.m. When it comes to seasons, the sun is strongest during the summer, as this is when Australia is closer to the sun (due to the earth’s orbit).

What UV level requires sunscreen?

Sun protection times are issued by the Bureau of Meteorology when the UV Index is forecast to reach 3 or above. At that level, it can damage your skin and lead to skin cancer. Sunscreen should be incorporated into your daily routine on these days.

At what UV Do you need sunscreen?

A UV Index reading 11 or higher puts you in a very dangerous spot for sunburn with damage occurring in less than 10 minutes if unprotected. At this level it is best to avoid all sun exposure between 10AM and 4PM. Find out the UV Index Level near you and protect yourself from damaging skin exposure.

Why is NZ sun so strong?

In high summer, the sunshine in New Zealand is really strong. … Earth’s orbit takes it closer to the sun during the southern summer than during the northern summer. There is less pollution in the southern-hemisphere to block the UV rays. The sun’s burning strength is measured by the UV index.

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Why is there no ozone layer in New Zealand?

Ozone concentrations measured over New Zealand are not affected directly by the ozone hole, which lies over Antarctica each spring. The ozone hole is an area where the ozone layer is less than 220 DU, caused mostly by ozone-depleting substances emitted by people.

What is the sunniest place in New Zealand?

Sunshine. Most places in New Zealand receive over 2,000 hours of sunshine a year – around 83 sunny days. The sunniest areas, Bay of Plenty, Hawke’s Bay and Nelson/Marlborough, receive over 2,350 hours of sunshine.

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