The strength of the sun's ultraviolet (UV) radiation is expressed as a Solar UV Index or Sun Index.The UV Index does not exceed 8 in the UK (8 is rare; 7 may occur on exceptional days, mostly in the two weeks around the summer solstice). A changing lifestyle and sun-seeking behaviour are responsible for much of the increase in skin cancers. For a wide range of timescales, sunburn in response to controlled UV radiation occurs in proportion to the total number of photons delivered, not varying with the intensity or duration of exposure. WebThe Global Solar UV Index (UVI) is a simple measurement of the UV radiation level at the Earth's surface. Unsurprisingly, climate change is not having a positive effect on skin cancer trends around the world. The scale was developed by Canadian scientists in 1992, and then adopted and standardized by the UN's World Health Organization and World Meteorological Organization in 1994. Average Sea Surface Temperature (AVHRR, 1985-97), Sea Surface Temperature (AVHRR, 1981-2006), Sea Surface Temperature Anomaly (AMSR-E, 2002-11), Sea Ice and Snow Extent, Northern Hemisphere, Sea Ice Concentration and Snow Extent, Global, What Climate Change Means for Glaciers, Storms, Fires, Clouds, and More. Monthly mean UVI at the local noon over Europe for January until June over the time period 19832015 based on satellite data. The index ranges from 0 to 11+ and the values are grouped into various exposure categories. Ground reflection: grass, soil and water reflect less than 10% of UV radiation; fresh snow reflects as much as 80%; dry beach sand about 15% and sea foam about 25%. If sun protection is required, this should include all protective means, i.e. ", "SunSmart Global UV App helps protect you from the dangers of the sun and promotes public health", "Your Time in the Sun, Measured to the Minute", https://en.wikipedia.org/w/index.php?title=Ultraviolet_index&oldid=1148252647, Articles with unsourced statements from July 2022, Creative Commons Attribution-ShareAlike License 3.0. UV radiation exposure is cumulative during the day. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests. The values of the index range from zero upward - the higher the UVI, the greater the potential for damage to the skin and eye, and the less time it takes for harm to occur. Sunburn is caused by UV radiation which cannot be felt. The specified UV Index values serve as a benchmark for a typical atmospheric condition at each respective location. WebUV index. The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website. The values of the index range from zero upward - the higher the UVI, the greater the potential for damage to the skin and eye, and the less time it takes for harm to occur. A higher index value indicates a greater potential for harmful effects to the skin and eyes. The UVI is an international standard index that describes the level of solar UV radiation on the earths surface. The UV index is used to forecast the strength of the sun's ultraviolet rays. If you dont feel the hot rays of the sun you wont get sunburnt. WebThese maps show the average annual, monthly and seasonal values of the UV Index over Australia for the period 1979-2007 under cloud-free conditions at local noon, when the sun is at its highest. The clear/sunny sky peak UVI index is reduced by cloud cover. It is estimated that as little as a 10% reduction in ozone thickness will result in an additional 300,000 non-melanoma and 4,500 melanoma skin cancer cases (10).
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