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because land heats up and cools down very fast so at night when the sun is not there the land starts to cool down quickly and the excess of heat is sent back by long wave radiation
Wiki User
∙ 12y ago
Wiki User
∙ 11y agoThe humidity rises at night because it is generally cooler at night than in the daytime. Relative humidity is described as a percentage of the maximum amount of water that air can hold for any given temperature. Because cool air cannot hold as much water as warm air, the relative humidity goes up as the temperature goes down. This is why it is called RELATIVE.
Clouds and fog can be described as areas were humidity is 100% and the clear air around them is some percentage less than 100%. If you take a volume of air with moisture in it and start cooling it, eventually fog will form, meaning you will have reached 100% humidity. People talk about fog burning off but what is really happening is the relative humidity is decreasing as the sun heats the air in the morning.
Wiki User
∙ 9y agoThe relative humidity increases as the temperature lowers. Night temperatures are generally cooler than day time temperatures. As the relative humidity increases, moisture forms. Morning dew is an example of what happens when the relative humidity increases during the cooler night-time temperatures.
Wiki User
∙ 10y agoRelative humidity is higher as the temperature approaches the dew point, meaning usually it will be most humid right before dawn (at night typically, but also early in the morning). Think about when you're most likely to see fog and that's when it's most humid.
Wiki User
∙ 12y agoIf there is no change in the amount of atmospheric moisture, humidity will decrease as the temperature warms. Remember that relative humidity is relative to the amount of moisture the air can hold. If you keep the moisture constant and increase the temperature (increase the amount of moisture the air can hold), you'll have a smaller fraction, and therefore a lower relative humidity.
Vanisha Boodhram
Because land heats up and cools down very fast so at night when the sun is not there the land starts to cool down quickly and the excess of heat is sent back by long wave radiation
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What happens to the humidity as the differences of the dry and wet bulb increase?
the relative humidity will decrease.
What are the two things that increase humidity?
In terms of RELATIVE humidity, you can either add moisture to the air or lower the temperature.
Which is the comparison of the amount of moisture in the air to the amount of moisture it can hold?
relative humidity
When warmer air rises above the frontal surface expands and cools as it ascends does it relative humidity increase or decrease?
Increase
Does steam make humidity rise or lower?
In general, steam is water so you're adding water to the air and raising the humidity. The small caveat is that steam is also going to heat the air, so it can hold more moisture. By adding moisture you increase the numerator of the relative humidity term, and by raising the heat you increase the denominator. In the end, the moisture would win and the relative humidity would increase.
Will humidity increase with air pressure increase in a closed vessel?
The relative humidity in a closed vessel will not change due to pressure. Assuming water is the fluid, the relative humidity will stabilize to 100%.
What happens to the humidity as the differences of the dry and wet bulb increase?
the relative humidity will decrease.
The highest relative humidity on a particular day usually occurs in the midafternoon?
False, a decrease in temperature results in an increase of relative humidity
What will increase the relative humidity in a home during winter?
A Humidifier
Describe the likely temperature and relative humidity that occur during the night?
-35 degrees Celsius.., the relative humidity will be in the high 90%
What are the two things that increase humidity?
In terms of RELATIVE humidity, you can either add moisture to the air or lower the temperature.
What term is defined as the amount of water vapor in the air compared to the amount of water that the air can hold?
This is the measure of relative humidity. At 50 percent relative humidity, the air is holding half of what it could. It is relative humidity because it is related to the temperature and pressure of the air.
Which is the comparison of the amount of moisture in the air to the amount of moisture it can hold?
relative humidity
How can relative humidity increase diffusion rate?
Relative humidity increases when the amount of moisture air can hold increases. The increase can be caused by the introduction of more moist air, OR a temperature drop of the air/moisture mixture without a loss of moisture. Colder air will hold less moisture than warm air; as the temperature goes down the amount of moisture relative to what the air can hold increases.
When warmer air rises above the frontal surface expands and cools as it ascends does it relative humidity increase or decrease?
Increase
Does steam make humidity rise or lower?
In general, steam is water so you're adding water to the air and raising the humidity. The small caveat is that steam is also going to heat the air, so it can hold more moisture. By adding moisture you increase the numerator of the relative humidity term, and by raising the heat you increase the denominator. In the end, the moisture would win and the relative humidity would increase.
Amount of moisture in air compared to amount needed in saturation?
Relative humidity.
