G1250 - last section of powerpoints Flashcards
cumulonimbus clouds shape indicates ? and intensity of vertical motion
stability
what is the definition of stability
determined by the response of an object displaced from its initial postion
what are the three types of stability
stable
unstable
neutral
how to define stable
object displaced from initial position returns to that position
how to define unstable
object displaced from initial position accelerates away from that position
how to define neutral
object displaced from Initial positionh remains were displaced
how to define a parcel
a small hypothetical volume
what are the three interactions of a parcel with the surrounding environment
flexible boundaries
no MASS exchange with surrouding environment
no ENERGY exchange with surrounding environment… adiabatic
what are the rates at which parcels cool
dry adiabatic 10c/km
moist adiabatic 6c/km
what is sounding
rate of temperature change in the environment is NOT constant
sounding is the vertical temp profile of
the environment
how do you determine atmosphere stability for a given sounding
parcel at surface
assume parcel and environment air are identical at the surface
lift parcel from surface to 1km
if the temp of the parcel air is colder than that of the environment then parcel more dense than environment parcel sinks to surface
stable
if the temp of the parcel air is warmer than that of the environment then parcel less dense than environment
parcel accelerates away from the surface
unstable
if the temp of the parcel air is equal to that of the environment then parcel and environment densities are identical
parcel remains at 1km
neutral
if the parcel is colder than the surrounding environment at 1km, then the parcel density will be ? that of the surrounding environment
greater than
if the parcel is warmer than the surrounding environment at 1km then the parcel density will be ? than that of the surrounding environment
less than
if the parcel and environment temperature at 1km are equal, then the parcel density will be ? then that of the surrounding environment
equal to
if the parcel is colder than the surrounding environment at 1km, then the parcel will ? and the atmosphere is ?
sink, stable
if the parcel is warmer than the surrounding environment at 1km, then the parcel will ? and the atmosphere is ?
rise, unstable
if the parcel and environment temperatures at 1km are equale, then the parcel will ? and the atmosphere is ?
neither rise nor sink, neutral
