Ultraviolet index
De ultraviolet index, anaa UV index, be an international standard measurement of de strength of de sunburn-producing ultraviolet (UV) radiation for a particular place den time. Dem dey primarily use am insyd daily den hourly forecasts aim for de general public. De UV index be designed as an open-ended linear scale, directly proportional to de intensity of UV radiation, wey dey adjust for wavelength based for wat dey cause human skin make e sunburn.[1] De purpose of de UV index be make e help people effectively protect dema bodies from UV radiation, wich get health benefits for moderation buh for excess dey cause sunburn, skin aging, DNA damage, skin cancer, immunosuppression,[2] den eye damage, such as cataracts.
Na de scale be developed by Canadian scientists insyd 1992, wey dem adopt den standardize am by de UN ein World Health Organization den World Meteorological Organization insyd 1994.[3] Public health organizations recommend say make people protect dema bodies (for example, by make dem apply sunscreen to de skin den make dem wear a hat den sunglasses) if dem spend substantial time outdoors wen de UV index be 3 anaa higher.
Index usage
[edit | edit source]When de day ein predicted UV index dey within various numerical ranges, de recommendations for protection be as follows:[4]
| UV index | Media graphic color | Risk of harm from unprotected sun exposure, for the average adult | Recommended protection |
|---|---|---|---|
| 0–2 | Green | "Low" | A UV index reading of 0 to 2 dey mean low danger from de Sun ein UV rays give de average person.
Make you wear sunglasses for bright days. If you burn easily, cover up den use broad spectrum SPF 15+ sunscreen. Bright surfaces,[5] sand, water, den snow,[6] go increase UV exposure. |
| 3–5 | Yellow | "Moderate" | A UV index reading of 3 to 5 dey mean moderate risk of harm from unprotected sun exposure.
Stay for shade insyd near midday wen de sun be strongest. If outdoors, make you wear sun-protective clothing, a wide-brimmed hat, den UV-blocking sunglasses. Make you generously apply broad spectrum SPF 50+ sunscreen every 1.5 hours, even for cloudy days, den after swimming anaa sweating. Bright surfaces, such as sand, water, den snow, go increase UV exposure. |
| 6–7 | Orange | "High" | A UV index reading of 6 to 7 dey mean high risk of harm from unprotected sun exposure. Dem dey hia protection against skin den eye damage.
Reduce time insyd de sun between 10 a.m. den 4 p.m. If outdoors, make you seek shade den wear sun-protective clothing, a wide-brimmed hat, den UV-blocking sunglasses. Make you generously apply broad spectrum SPF 50+ sunscreen every 1.5 hours, even for cloudy days, den after swimming anaa sweating. Bright surfaces, such as sand, water, den snow, go increase UV exposure. |
| 8–10 | Red | "Very high" | A UV index reading of 8 to 10 dey mean very high risk of harm from unprotected sun exposure. Make you take extra precautions secof unprotected skin den eyes go be damaged wey fi burn quickly.
Minimize sun exposure between 10 a.m. den 4 p.m. If outdoors, make you seek shade den wear sun-protective clothing, a wide-brimmed hat, den UV-blocking sunglasses. Make you generously apply broad spectrum SPF 50+ sunscreen every 1.5 hours, even for cloudy days, den after swimming anaa sweating. Bright surfaces, such as sand, water, den snow, go increase UV exposure. |
| 11+ | Violet | "Extreme" | A UV index reading of 11 anaa more dey mean extreme risk of harm from unprotected sun exposure. Make you take all precautions secof unprotected skin den eyes fi burn for minutes.
Make you try avoid sun exposure between 10 a.m. den 4 p.m. If outdoors, make you seek shade den wear sun-protective clothing, a wide-brimmed hat, den UV-blocking sunglasses. Make you generously apply broad spectrum SPF 50+ sunscreen every 1.5 hours, even for cloudy days, den after swimming anaa sweating. Bright surfaces, such as sand, water, den snow, go increase UV exposure. |
References
[edit | edit source]- ↑ "UV Index Overview". U.S. Environmental Protection Agency. 2022.
- ↑ Hanneman, K. K.; et al. (January 2006). "Ultraviolet immunosuppression: Mechanisms and consequences". Dermatologic Clinics. 24 (1): 19–25. doi:10.1016/j.det.2005.08.003. PMID 16311164.
- ↑ Heckman, C. J.; Liang, K.; Riley, M. (2022). "Awareness, Understanding, Use, and Impact of the UV Index: A Systematic Review of Over Two Decades of International Research". Preventive Medicine. 123: 71–83. doi:10.1016/j.ypmed.2019.03.004. PMC 6534479. PMID 30844501.
- ↑ "UV Index Scale". Sun Safety. U.S. Environmental Protection Agency. 2013-02-04. Retrieved June 28, 2019.
- ↑ Dresbach, Sereana Howard & Brown, Wanda (2008). "Ultraviolet Radiation" (PDF). The Invisible Environment Fact Sheet Series. The Ohio State University. CDFS-199-08. Archived from the original (PDF) on January 17, 2009.
- ↑ Organization, World Meteorological (2002). Global Solar UV Index: A Practical Guide. World Health Organization. hdl:10665/42459. ISBN 978-92-4-159007-5.
External links
[edit | edit source]
- Real-time Global Ultraviolet Index - A graphical view of the current UV index for the globe.
- Radiation: The ultraviolet (UV) index - World Health Organization
- Europe UV Index Forecast - European Climate and Health Observatory
- Australian UV Index Forecast - Australian Bureau of Meteorology
- United States UV index forecast - National Weather Service: Climate Prediction Center
- UV Index Forecasts - UV Index Today: Hourly USA UV Index Forecasts