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How does the moist adiabatic lapse rate compare with the dry-adiabatic lapse rate?
Wiki User
∙ 13y ago
environmental lapse rate involves the actual temperature of the atmosphere at various heights.
adiabatic cooling is the cooling of air caused when air is not allowed to expand or compress.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoEnvironment lapse rate is nothing but rate of reduction/decrease with height for an atmospheric variable, mostly temprature is considered.
It will not sound good, if we don't discuss it mathematically,
r = - dT/dH , which can be phrased as negative of the rate of change of temprature with change in altitude.
T =Temprature, H = Height
Of course there are two types of lapse rate
1.Environmental lapse rate - This actually refers to the actual change of temperature with altitude for the stationary atmosphere (i.e. the temperature gradient)
The environmental lapse rate also represented as ELR, is the rate of reduction of temperature with height in the stationary atmosphere at a given time and location.
2.The adiabatic lapse rate - This refer to the change in temperature of a mass of air as it moves upwards.
Further there are two adiabatic rates:
a.Dry adiabatic lapse rate
The dry adiabatic lapse rate also shorted as DALR is the rate of temperature decrease with height for a parcel of dry or unsaturated air rising under adiabatic conditions.
b.Moist/saturated adiabatic lapse rate
This applies when the air is saturated with water vapor at said dew point also shorted as MALR or saturated adiabatic lapse rate - SALR.
The following are the key differences:
Environmental Lapse rate is change of temperature with altitute for a stable atmosphere where as adiabatic lapse rates is the change in temperature of a mass of air as it moves upwards.
Wiki User
∙ 12y agorelationship between adiabatic and Ambient lapse rate provides information about the stability of the rising parcel of air. when adiabatic lapse rate is greater than ambient lapse rate, the situation is stable. In this case the rising air cools at a rate greater than the surrounding air. when ambient rate is greater than the adiabatic rate, unstable condition prevails.
Wiki User
∙ 13y agoThe moist rate may be more or less, depending on the conditions.
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When the environmental lapse rate is between the dry and moist adiabatic lapse rates conditions are described as what?
They are called conditionally unstable,
What is the rate of cooling as you increase in elevation?
The rate at which adiabatic cooling occurs with increasing altitude for wet air (air containing clouds or other visible forms of moisture) is called the wet adiabatic lapse rate, the moist adiabatic lapse rate, or the saturated adiabatic lapse rate.
Why is the lapse rate of moist air less than that of the dry air?
I think maritime polarWhen dry air is lifted, the temperature drops at the dry adiabatic lapse rate. If the lifted air is moist and eventually becomes saturated, then water vapor will start to condense. Energy is released when water vapor turns from solid to liquid (opposite of needing to add energy to liquid to make it evaporate, such as when you have to turn up the temperature on a stove to boil water). This release of energy - the "latent heat of vaporization" - warms the air, so the lapse rate is less for saturated air.
Which property remains unchanged during an adiabatic saturation moist air?
Wet bulb temperature
What is Saturn air like?
moist moist moist
When the environmental lapse rate is between the dry and moist adiabatic lapse rates conditions are described as what?
They are called conditionally unstable,
Is the adiabatic lapse rate higher when its cloudy or not?
There are two types of adiabatic lapse rates...wet and dry. (wet is also referred to as saturated or moist) To the extent that the cloudiness your question refers to represents saturated air, then no, the wet adiabatic lapse rate would be lower (approximately 1.5C/1000') than the dry adiabatic lapse rate (approximately 3C/1000').
What is the rate of cooling as you increase in elevation?
The rate at which adiabatic cooling occurs with increasing altitude for wet air (air containing clouds or other visible forms of moisture) is called the wet adiabatic lapse rate, the moist adiabatic lapse rate, or the saturated adiabatic lapse rate.
The rate of temperature change (0.6 degrees C for every 100 m) of saturated air as it rises or falls is the moist-adiabatic?
lapse rate
What is the normal environmental lapse rate?
Usually somewhere between moist and dry adiabatic lapse rates: 6.5 C/1000 m - 10C/1000 m. It varies though seasonally, with location, and with time of day.
The lapse rate for moist air is lower than for dry air because?
- Moist air has water vapor in it. - As a moist air parcel rises, the water vapor will condense (latent heat of condensation) - latent heat is released, meaning a temperature increase occurs within that air parcel, effectively dampening its lapse rate. Thus, the latent heat of condensation is working to decrease the lapse rate because sensible heat is being released in the process; its called the Moist Adiabatic Rate (MAR) In contrast, the Dry Adiabatic Rate (DAR) considered for Dry air (no water vapor) does not involve condensation, and thus no latent heat is released; meaning the lapse rate is unaffected.
Why is there a difference between the dry and moist adiabatic lapse rates?
Air that is rising at the dry adiabatic rate can simply cool at the rate at which the decreasing pressure forces it to. Once it cools to its dew point at the lifting condensation level, it must condense some of its moisture in order to cool anymore (it is already saturated at this point). Condensation is a process that releases latent heat into the atmosphere, warming the air. Therefore, this heat released counteracts some of the adiabatic cooling that continues to take place as the air rises, and the net effect is a rate of cooling that is reduced. This is the saturated (or moist) adiabatic lapse rate.
The rate of temperature change 0.6 degrees C for every 100 m of saturated air as it rises or falls is the moist adiabatic?
Lapse rate
Why is the lapse rate of moist air less than that of the dry air?
I think maritime polarWhen dry air is lifted, the temperature drops at the dry adiabatic lapse rate. If the lifted air is moist and eventually becomes saturated, then water vapor will start to condense. Energy is released when water vapor turns from solid to liquid (opposite of needing to add energy to liquid to make it evaporate, such as when you have to turn up the temperature on a stove to boil water). This release of energy - the "latent heat of vaporization" - warms the air, so the lapse rate is less for saturated air.
Explain why the lapse rate of moist air is less than that of dry air?
I think maritime polarWhen dry air is lifted, the temperature drops at the dry adiabatic lapse rate. If the lifted air is moist and eventually becomes saturated, then water vapor will start to condense. Energy is released when water vapor turns from solid to liquid (opposite of needing to add energy to liquid to make it evaporate, such as when you have to turn up the temperature on a stove to boil water). This release of energy - the "latent heat of vaporization" - warms the air, so the lapse rate is less for saturated air.
Which property remains unchanged during an adiabatic saturation moist air?
Wet bulb temperature
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.
