What is the UV Index and how to calculate it - OTT Blog
Web30 Mar 2022 · From UV-E radiation measurements, the UV-Index is calculated as follow: Take the output from the UV-E radiometer according to ISO 17166:1999/CIE S007/E-1998. Transform the output voltage to W/m² with the instrument’s sensitivity, for example 0.4 Volt, which corresponds to an erythemal radiation value of 0.0675 W/m².
How to Compute the UV Index: 9 Steps (with Pictures) - wikiHow
Web18 Feb 2023 · As established by the inventors of the UV Index, the strength of UV at each wavelength from 290 to 400 nm is summed to represent the overall impact UV radiation has on human skin. Sticking with the example shown above, the total effect of UV is 330 (85 + 175 + 70 = 330).
What is the UV index and how is it calculated? | HowStuffWorks
Web12 Mar 2024 · The UV index is calculated based on four factors: The thickness of the ozone layer over your city (detected using satellites) The cloud cover over your city (clouds block UV radiation to varying degrees) The time of year (in winter, UV radiation is lower than in the summer because of the sun's angle)
UV Index | Find out the UV Index in your area | NIVEA
WebThe UV Index is issued daily to advise you on the strength of the sun's UV rays in your region. The UV Index scale is divided into 5 levels and ranges from low (1-2) to extremely high (11+). For each level, we recommend you use SPF that tailors to your skin’s needs. Remember, the higher the UV Index scale number, the stronger the rays.
Learn About the UV Index | US EPA - U.S. Environmental …
Web5 Feb 2024 · 280 x 1.06 x 0.73 = 216.7. The final step of the calculation scales the total UV effect, dividing it by 25 and rounding to the nearest whole number. The result is a number that usually ranges from 0 (darkness or very weak sunlight) to the mid-teens (very strong sunlight). This value is the UV Index.
Ultraviolet index - Wikipedia
WebDescription. Typical variation of UV index by time of day and time of year, around 40.71 -74.01, based on FastRT UV Calculator [4] The UV index is a linear scale that measures the intensity of UV radiation with respect to sunburn.
What is the UV index? An expert explains what it means and how …
Web20 Dec 2021 · The UV index tells you how much ultraviolet radiation is around at ground level on a given day, and its potential to harm your skin. UV radiation is a component of sunlight that can cause...
Radiation: The ultraviolet (UV) index - World Health Organization …
Web20 Jun 2022 · What is the UV index? a measure of the level of UV radiation; 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; an important vehicle to alert people about the need to use sun protection.
The UV Index Explained - WebMD
Web12 Feb 2024 · Low exposure (green): 1-2. Moderate exposure (yellow): 3-5. High exposure (orange): 6-7. Very high exposure (red): 8-10. Extreme exposure (violet): 11+. The index only predicts levels of UV...
UV Index: How is It Computed? - Climate Prediction Center
WebThe UV Index value is determined by dividing the dose rate (milliWatts per square meter) by the standard of 25 milliWatts per square meter. This results in a number that usually ranges from 0 (where there is no sun light) to the mid 'teens. Currently, the tropospheric aerosol loading is derived from a semi-annual climatology.
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