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Why does relative humidity decrease after the sun rises and increase after the sun sets?
"Because relative humidity is related with the temperature of the air. Relative humidity is the rate of water vapour to the maximum amount of water vapour can air hold at that temperature. The amount of water vapour that air can hold is increses as the temperature of the air increases. If the air holds same amount of water while the temperature is incresing, relative humidity of the air decreses because maximum amount of water that air can hold increases and the rate of humidity to tha maximum humidity decreses."
Someone had given this answer, and it is partially correct, however, their bizarre English and grammar skills make it hard to understand. I think what they meant was that relative humidity is the amount of water vapor in the air, compared to what the air can "hold" at a given temperature. As temperature increases, the amount of water vapor or moisture the air can hold does as well.
So, after the sun rises the temperature of the air increases, so does the amount of moisture the air can hold and the actual amount of water vapor in the air may stay the same, thus decreasing the relative humidity. The opposite happens at night.
Relative humidity = (actual vapor density/ saturation density) x100%
What else can I help you with?
Why do cumulus clouds look like floating cotton?
First, warm air, heated by the surface, rises. As it rises, the temperature drops, which increases the relative humidity. Once the relative humidity passes 100%, water vapor in the air begins to condense. The formation of a cumulus cloud occurs when the water vapor condenses on various nuclei in the air. This creates the puffy cotton-like look of cumulus clouds.
What process happens when a cloud forms?
The ground is heated up differently due to receiving different amount of insolation and air over warmer parts will rise first. Rising air expand with low pressure at high altitude. Air mass cool and relative humidity increase and saturation humidity decreases. Air force upwards, surrounding air is not as warm as rising air. When air reach dew point, water vapour starts to condense on atmospheric particles which acts as a condensation nuclei. Relative humidity reaches 100% saturation. Cloud formation continues as high as air rises. When air stop rising, cloud development stops. More uplift means the clouds will be taller and deeper. HOPE IT HELPS! :):)
Will clouds form over islands that have no mountains?
Yep. All you need is something to cause moist air to rise. Without the mountain to lift horizontal wind to vertical draft, the adiabatic process will lift the flat land's hotter moist air versus the the normal environment lapse rate. As this moist air rises, it cools & relative humidity increases until it reaches the dew point & the water condenses out to form a cloud.
How does warm wet air rise?
Warm wet air rises because it is less dense than the surrounding cooler air. As the warm air rises, it expands and cools, causing water vapor within it to condense and form clouds. This process is known as convection, where the warm air displaces the cooler air above it, creating upward movement.
Why does A balloon filled with hydrogen rises to a certain height then stops rising further?
A hydrogen balloon rises due to the buoyant force that is exerted on it by the surrounding air. As it ascends, the air becomes less dense, causing the buoyant force to decrease until it eventually matches the weight of the balloon, resulting in it reaching a point of equilibrium and no longer rising.
When warmer air rises above the frontal surface expands and cools as it ascends does it relative humidity increase or decrease?
When warmer air rises above the frontal surface, it expands and cools as it ascends. As the air cools, its relative humidity increases because cooler air has a lower capacity to hold moisture, leading to saturation and potentially precipitation.
What happens to relative humidity as a parcel or air rises?
As a parcel of air rises, it expands and cools adiabatically. This cooling causes relative humidity to increase, as the air temperature drops and its capacity to hold moisture decreases. If the air parcel reaches its dew point temperature, the relative humidity will reach 100% and condensation or cloud formation may occur.
How does relative humidity change with temperature?
As temperature increases, relative humidity decreases. This is because warmer air can hold more moisture, so the relative humidity percentage decreases as the air temperature rises.
During a clear calm day the relative humidity will tend to BLANK from sunrise to early afternoon?
During a clear calm day, the relative humidity will tend to decrease from sunrise to early afternoon as the air temperature rises and air is able to hold more moisture.
When the air rises does it increase or decrease?
When air rises, it expands and cools, which causes its density to decrease. Conversely, when air descends, it compresses and warms, which causes its density to increase.
What term refers to the temperature at which the relative humidity is 100?
That would be "dewpoint"...When the air temperature falls to the dewpoint (or dewpoint rises to the air temperature), then you have 100% relative humidity.
How does a change in temperature affect relative humidity and specific humidity?
When the temperature of air is cooled or reduced the relative humidity (RH) increases. The moisture content of the air remains the same until the RH rises to the point of 100% saturation and condensation occurs.
Does the rate of water evaporation increase or decrease as temperature rises?
As temperature rises, the rate of water evaporation increases.
What is the effect on relative humidity when the temperature of a body of air increases?
When the temperature of a body of air increases, its relative humidity decreases. Warmer air can hold more moisture, so as the temperature rises, the air can distribute the moisture more evenly and the relative humidity decreases.
When saturated air is warmed?
When saturated air is warmed, its ability to hold water vapor increases, leading to a decrease in relative humidity. This can result in the condensation of excess water vapor, creating clouds or fog if the air is cooled again.
When air is cooled what happens to Relative Humidity?
Yes. Relative humidity is the amount of water vapor actually in the air compared to the amount that could be in the air (saturation point) at the exisiting temperature. So, if the temperature of the air changes and the amount of water vapor in it does not, the relative humidity will be different. But, if the temperature of the air changes and so does the amount of water vapor in it, then the relative humidity could be the same as before the temperature change. That is to say that the air could contain the same percentage of water vapor that it could hold at each temperature, even though the actual amounts are different.
Does air become lighter as the temperature rises?
noThe density decrease when the temperature increase.
