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.
What city has the highest UV index?
On Dec. 29, 2003, a world-record UV index of 43.3 was detected at Bolivia’s Licancabur volcano.
Why UV index in Australia is so high?
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.
Where are the UV rays strongest?
UV is most intense at noon when the sun is at its highest point in the sky, and UV rays have the least distance to travel through the atmosphere. Especially in the hot summer months, it is a good idea to remain indoors during the peak sun hours of 10am and 4pm.
What is the highest UV index?
UV Index Scale
- 0 to 2: Low. A UV Index reading of 0 to 2 means low danger from the sun’s UV rays for the average person. …
- 3 to 5: Moderate. A UV Index reading of 3 to 5 means moderate risk of harm from unprotected sun exposure. …
- 6 to 7: High. …
- 8 to 10: Very High. …
- 11 or more: Extreme.
28 дек. 2016 г.
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.
Where is the sun most intense on Earth?
Only locations lying along one line of latitude on the surface of the Earth can receive sunlight at a 90 degree angle on a given day. All other places receive sunlight at lesser intensities. In general, the sun’s rays are the most intense at the equator and the least intense at the poles.
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 hottest town in Australia?
In Marble Bar, which claims to be Australia’s hottest town, the temperature hit at least 113 degrees on 32 days this summer. Some residents worry that “there’s got to be a point where you actually start to cook.”
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).
Is UV light safe for humans?
UVC radiation is commonly used inside air ducts to disinfect the air. This is the safest way to employ UVC radiation because direct UVC exposure to human skin or eyes may cause injuries, and installation of UVC within an air duct is less likely to cause exposure to skin and eyes.
What color blocks the most UV rays?
Darker colors absorb more UV than lighter colors like whites and pastels. This means the UV rays are less likely to reach your skin. But bright colors such as red can also absorb UV rays. The more vivid the color, the greater the protection—a bright yellow shirt is more protective than a pale one.
Is UV light bad for you?
In addition to skin cancer, exposure to UV rays can cause other health problems: … Exposure to UV rays can cause premature aging of the skin and signs of sun damage such as wrinkles, leathery skin, liver spots, actinic keratosis, and solar elastosis. UV rays can also cause eye problems.
What does 0 of 10 UV index mean?
The UV Index provides a daily forecast of the expected risk of overexposure to the sun. The Index predicts UV intensity levels on a scale of 0 to 10+, where 0 indicates a minimal risk of overexposure and 10+ means a very high risk.
Do I need sunscreen if UV index is 1?
Whether the UV Index is 1 or 5, you should always wear a broad spectrum sunscreen of at least SPF 30. But when the UV Index is above 5, you’ll want to take extra precautions. … You should do this at least every two hours (or more frequently if the UV Index is high).
Is the sun strong in Dubai?
This is a place that sees an average of five rainy days per year and has virtually no clouds, so the sun’s rays are extremely strong. This especially applies for those who are brave enough to try to tan during summer.