The UV Index is accompanied by recommendations for sun protection and is a useful tool for planning Use and reapply broad-spectrum sunscreen of sun protection factor (SPF) 15+ liberally. Emmanuelle Bournay, GRID-Arendal, Tags: Predictions are made by a computer model that accounts for the effects of sun-earth distance, solar zenith angle, total ozone amount, tropospheric aerosol optical depth, elevation, snow/ice reflectivity and cloud transmission, all of which influence the amount of UV radiation at the surface.[6]. WebCountries; All countries (UV) radiation. On Dec. 29, 2003, a world-record UV index of 43.3 was detected at Bolivia's Licancabur volcano. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance. Official websites use .gov To illustrate the spectrum weighting principle, the incident power density in midday summer sunlight is typically 0.6mW/(nm m2) at 295nm, 74mW/(nm m2) at 305nm, and 478mW/(nm m2) at 325nm. Estimated to have over 106,000 new cases in 2021 alone (roughly 5.6% of all new cancer diagnoses this year), melanoma is currently ranked as the 19th most common cancer in the world (2)(3). An index of 0 corresponds to zero UV radiation, as is essentially the case at night. You cant get sunburnt while in the water. 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. This indicator provides state and county level data on monthly and annual average doses of UV irradiance measured daily and at noon. Exposure to solar ultraviolet (UV) radiation Data by country You are here: By category; Public health and environment; Ultraviolet (UV) radiation; Exposure to solar ultraviolet (UV) radiation; Regions. The Global Solar UV Index (UVI) described in this document is a simple measure of the UV radiation level at the Earths surface and an indicator of the potential for skin damage. WebThe UV index climatology shows how much UV exposure a person could get on average during each month. The specified UV Index values serve as a benchmark for a typical atmospheric condition at each respective location. Bright surfaces, such as sand, water, and snow, will increase UV exposure. Summertime values in northern latitudes rarely exceed 8. How does UV radiationaffect yourhealth? To receive email updates about this page, enter your email address: We take your privacy seriously. January. Moderate mean UVI values occur between 30 and 48 N and high UVI south of 35 N. Additionally, very high mean UVI up to 7.8 are detected south of 32 N. Figure 3. April. Unless protective clothing and sunglasses are worn, skin and eyes can be damaged in minutes, For example, assuming similar spectral power distributions, radiation with a UV index of 12 is twice as intense as radiation as a UV index of 6. The clear/sunny sky peak UVI index is reduced by cloud cover. Additionally, wearing broad-spectrum high SPF (sun protection factor) sunscreens while spending any time outdoors is one of the best ways to protect your skin. WebThe Cancers Attributable to UV Radiations. While the smaller wavelength UVC rays often only impact the top layer of our skin, UVA rays can deeply penetrate every layer of the skin, capable of causing cellular disruption in the deepest dermis layer (5). U.S. January Solar DNI Average. The index ranges from 0 to 11+ and the values are grouped into various exposure categories. Generously apply broad spectrum SPF 15+ sunscreen every 1.5 hours, even on cloudy days, and after swimming or sweating. Just fill out the form below. However, higher UV Index values SunSmart Global UV App helps protect you from the dangers of the sun and promotes public health, Independent Oversight and Advisory Committee. Some ZIP Codes may not be in our database. Vital Graphics Series. In Australia, a study in 2011 found the average UV index had increased by 26% between the 1970s and the period 19902009, due to depletion of the ozone layer. May. Figure 4. Take all precautions because unprotected skin and eyes can burn in minutes. These values are also representative of the values expected between 11 am and 1 pm local time (12 pm and 2 pm daylight saving time) under clear skies. Bright surfaces, such as sand, water, and snow, will increase UV exposure. These use the UV index and Fitzpatrick scale skin type to calculate the maximum exposure time before receiving a sunburn. As the Earth continually rotates in its orbit around the sun, certain countries are exposed to higher levels of UV radiation than others. January. January. Table 1 shows the average monthly UV Index across Australia. An official website of the United States government. The top 20 countries for skin cancer diagnoses (and their average summer UV index) are (7): #1 Australia (average UV index of greater than 12), #2 New Zealand (average UV index of greater than 11), #3 Norway (average UV index of 5 or less), #4 Denmark (average UV index of 6 or less), #5 Netherlands (average UV index of 5 or less), #6 Sweden (average UV index of 5 or less), #7 Germany (average UV index of 5 or less), #8 Switzerland (average UV index of 8 or less), #9 Belgium (average UV index of 7 or less), #10 Slovenia (average UV index of 8 or less), #11 Luxembourg (average UV index of 7 or less), #12 Ireland (average UV index of 6 or less), #13 Finland (average UV index of 5 or less), #14 The United Kingdom (average UV index of 8 or less), #15 (tied) Austria and France (average UV index of 7 and 6, respectively), #17 United States (average UV index of 9-10 depending on the state), #18 Czech Republic (average UV index of 7 or less), #19 (tied) Canada and Italy (average UV index of 6 and 9, respectively). The levels of UV radiation and therefore the values of the index vary throughout the day. This indicator provides state-level data on laws regarding sunscreen use in schools and indoor tanning restrictions for individuals younger than 18 years. Without the higher amounts of melanin in the skin, people with fair skin are at an elevated risk for experiencing UV radiation damage to their skin cells. Moderate mean UVI values occur between 30 and 48 N and high UVI south of 35 N. Additionally, very high mean UVI up to 7.8 are detected south of 32 N. Figure 3. As the largest organ in the human body, our skin has a lot of surface area for the potential development of health conditions. clothing, hat and sunglasses, shade and sunscreen. Try to avoid sun exposure between 10 a.m. and 4 p.m. The coldest month in Auckland, New Zealand, is July , with an average high-temperature of 13.8C (56.8F) and an average low-temperature of 10.4C (50.7F) . WebUV Index worldwide. Saving Lives, Protecting People, American Society for Dermatologic Surgery Association, Sunlight/UV Vulnerability and Preparedness, Centers for Disease Control and Prevention, U.S. Department of Health & Human Services. The UVI is an important vehicle to alert people about the need to use sun protection. Some exposure to the Suns rays is beneficial as it helps our bodies produce vitamin D. But too much exposure to UV rays can have harmful effects. WebThe Global Solar UV Index (UVI) The UVI is a simple measure of the UV radiation level at the Earth's surface. The UV index is used to forecast the strength of the sun's ultraviolet rays. To inform people about the risk one can expect from UV rays, the National Weather Service and the U.S. Out of the 50 holiday hotspots, Sri Lanka has the most dangerous radiation level, with an average score of 11.75[4]. These address different target audiences such as occupationally exposed people, tourists, school children and the general public.
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