adiabatic cooling Correct Answer-the cooling effect of reduced pressure on air as it rises higher in the atmosphere and expands.
adiabatic warming Correct Answer-air descends and is compressed by higher air pressure in the lower atmosphere (E.g., Warmed)
adiabatic processes are? Correct Answe...
EESC-212 MIDTERM 2 Questions with Correct Answers
adiabatic cooling Correct Answer-the cooling effect of reduced pressure on air as it rises higher in the atmosphere and expands.
adiabatic warming Correct Answer-air descends and is compressed by higher air pressure in the lower atmosphere (E.g., Warmed)
adiabatic processes are? Correct Answer-A thermodynamic process where there is no heat transfer (E.g., No radiative warming).
lapse rates Correct Answer-The rate of decrease of temperature with height with a parcel of air in the troposphere.
temperature inversions result in? Correct Answer-negative lapse rates.
environmental lapse rate Correct Answer-the observed (E.g., Measured) lapse rate of the troposphere (E.g., Around 6.5C/1000m).
some factors influencing environmental lapse rates? Correct Answer-1) different locations, 2) time of day, 3) seasonality.
how does the temperature profile of the troposphere affect the weather? Correct Answer-the primary effect is on atmospheric stability. atmospheric stability Correct Answer-state of equilibrium of the atmosphere, describes the tendency of air to move vertically up through the atmosphere.
stable atmosphere Correct Answer-1) air parcels do not tend to rise and remain at a static altitude, 2) most commonly occur when temperature inversions are present in the troposphere, 3) layers of warmer air at higher altitudes restricts the rising of air parcels from lower troposphere.
unstable atmosphere Correct Answer-1) air parcels tend to rise vertically
through the troposphere, 2) most commonly occur where strong lapse rates are present, 3) high lapse rates indicate that atmosphere cools rapidly with altitude.
why do we care about atmospheric stability? Correct Answer-unstable conditions cause air to rise and form precipitation, very unstable conditions lead to severe weather (E.g., Thunderstorms, hurricanes).
how do we determine whether the troposphere is unstable or stable? Correct Answer-we need to determine whether a rising air parcel will cool faster or slower adiabatically, relative to the environmental lapse rate (E.g., Cools faster; stable, cools slower; unstable).
two types of adiabatic lapse rate? Correct Answer-dry (E.g., Unsaturated), and wet (E.g., Saturated).
dry adiabatic lapse rate? Correct Answer-9.8C/1000m. wet adiabatic lapse rate? Correct Answer-5.0C/1000m.
why is the wet adiabatic lapse rate less than the dry adiabatic lapse rate? Correct Answer-as wet air cools and condenses, it releases latent heat into rising air (E.g., Will cool slower).
how do we know if an air parcel is saturated? Correct Answer-1) relative
humidity is 100%, 2) air temperature equals the dew-point temperature, 3) actual vapour pressure equals saturation vapour pressure, 4) mixing ratio equals the saturation mixing ratio.
lifting condensation levels (E.g., LCL) Correct Answer-the altitude at which the lapse rate transitions from the dry to wet adiabatic lapse rate (E.g., Base of clouds; Air temperature is equal to dew-point temperature).
dew-point lapse rate Correct Answer-1.8C/1000m.
Once saturated, dew-point lapse rate? Correct Answer-equals the wet adiabatic lapse rate.
chinook winds Correct Answer-warm, dry winds that sometimes move down slopes of mountains (E.g., As winds descend, they warm at dry adiabatic lapse rate).
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