Apparent temperature
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| Apparent temperature | |
|---|---|
windchill according to the temperature (indicated) and wind speed (acquired by some other method) | |
| Dimension | Index calculated to be similar to a temperature |
Apparent temperature, also known as "feels like",relative humidity and wind speed. The measure is most commonly applied to the perceived outdoor temperature. Apparent temperature was invented by Robert Steadman[3] who published a paper about it in 1984.[4] However, it also applies to indoor temperatures, especially saunas, and when houses and workplaces are not sufficiently heated or cooled.
- The heat index and humidex measure the effect of humidity on the perception of temperatures above +27 °C (81 °F). In humid conditions, the air feels much hotter, because less perspiration evaporates from the skin.
- The wind chill factor measures the effect of wind speed on cooling of the human body below 10 °C (50 °F). As airflow increases over the skin, more heat will be removed. Standard models and conditions are used.
- The globe thermometer exposed to the sun, which is not included in standard meteorological equipment used in official weather conditions reporting (nor are, in most cases, any other explicit means of measuring solar radiation; temperature measurement takes place entirely in a shade box to avoid direct solar effects). It also does not have an explicit relationship with the perceived temperature a person feels; when used for practical purposes, the WBGT is linked to a category system to estimate the threat of heat-related illness.[5]
Since there is no direct measurement of solar radiation in U.S. observation systems, and solar radiation can add up to 15 °F (8.3 °C) to the apparent temperature, commercial weather companies have attempted to develop their own proprietary apparent temperature systems, including
UV index
and cloud cover).
See also
References
- ^ Muroi, Millie; Layt, Stuart (14 July 2022). "In weather forecasts, what does 'feels like' temperature mean?". The Sydney Morning Herald. Retrieved 4 December 2022.
- ^ "BBC Weather - Help and FAQs - BBC Weather". BBC Online. 9 August 2022. Retrieved 4 December 2022.
- ^ "Online calculator: Apparent temperature". planetcalc.com. Retrieved 7 April 2020.
- ISSN 0733-3021.
- ^ "Wet Bulb Globe Temperature is Great for Heat Warnings - Why Don't We Use It?". Forbes.