Today in the weather forecast Humidity is 87%....what does it mean...
is it....
there is 87% of water vapor in air? and the remaining 13% is is what?
what if it decrease to 80% what is the remaining 20%?
what does this exactly indicate...
i know when it is more humid we perspire more
is it....
there is 87% of water vapor in air? and the remaining 13% is is what?
what if it decrease to 80% what is the remaining 20%?
what does this exactly indicate...
i know when it is more humid we perspire more
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Yes.you are right.
Air is mix of Nitrogen, Oxgen, CO2 , water vapor and other gases.
Weather forecasts are from the point of view of human comfort (not absolute humidity, but relative humidity)..so to know this percentage, it is combination of temperature and "dew point". the number of water vapor molecules in the air TO the number of water vapor molecules that COULD be in that same volume of air.
"Humans are sensitive to humid air because the human body uses evaporative cooling as the primary mechanism to regulate temperature. Under humid conditions, the rate at which perspiration evaporates on the skin is lower than it would be under arid conditions. Because humans perceive the rate of heat transfer from the body rather than temperature itself, we feel warmer when the relative humidity is high than when it is low.
For example, if the air temperature is 24 °C (75 °F) and the relative humidity is zero percent, then the air temperature feels like 21 °C (69 °F).[7] If the relative humidity is 100 percent at the same air temperature, then it feels like 27 °C (80 °F).[7] In other words, if the air is 24 °C (75 °F) and contains saturated water vapor, then the human body cools itself at the same rate as it would if it were 27 °C (80°F) and dry."
Air is mix of Nitrogen, Oxgen, CO2 , water vapor and other gases.
Weather forecasts are from the point of view of human comfort (not absolute humidity, but relative humidity)..so to know this percentage, it is combination of temperature and "dew point". the number of water vapor molecules in the air TO the number of water vapor molecules that COULD be in that same volume of air.
"Humans are sensitive to humid air because the human body uses evaporative cooling as the primary mechanism to regulate temperature. Under humid conditions, the rate at which perspiration evaporates on the skin is lower than it would be under arid conditions. Because humans perceive the rate of heat transfer from the body rather than temperature itself, we feel warmer when the relative humidity is high than when it is low.
For example, if the air temperature is 24 °C (75 °F) and the relative humidity is zero percent, then the air temperature feels like 21 °C (69 °F).[7] If the relative humidity is 100 percent at the same air temperature, then it feels like 27 °C (80 °F).[7] In other words, if the air is 24 °C (75 °F) and contains saturated water vapor, then the human body cools itself at the same rate as it would if it were 27 °C (80°F) and dry."