Flashcards in Lesson 302 Formation Of Clouds And Weather Deck (14):
List the 5 reasons why clouds are important in meteorology.
Forms of weather
Effects on the heat budget
State the two main processes in the atmosphere that produce cloud
What are the two main processes of cooling?
Define diabatic process.
One in which there is an exchange or transfer of heat across the boundaries of a parcel i.e.something warm heats up something cold or vice versa.
List the three common types of diabatic cooling in the atmosphere.
Generally ________ wind will favour fog formation whereas ________ wind will lead to the formation of stratus.
An adiabatic process is one in which there is ___________________ across the boundaries of a parcel and heating or cooling occurs through ________ or ________ of the parcel itself due to __________ change.
No exchange of heat
Compression or expansion
List the five synoptic situations where large scale dynamic lift will often produce clouds and weather.
Vicinity of low pressure centres and troughs
Regions of baroclinic development
In advance of warm fronts and TROWALs
Ahead of upper short wave troughs
Jet stream maximums (RELE)
What is the main cause for the formation of cloud in the boundary layer?
Low-level convergence generating upward vertical motion
List the broad scale processes used to asses the presence of boundary layer clouds and precipitation:
Low level convergence
Surface winds >15 KT
Large areas with moist surface conditions
Evaporation of precipitation
Cooling by advection/conduction
Wind speed during night time cloud formation will be the determining factor on type and thickness. State the speeds and type of cloud formed.
>10 KT = SC
<10 KT = FG / ST
The main process for dissipating boundary layer cloud during the day is initiated by ________ _________.
Explain how upslope boundary layer clouds and precipitation are formed.
A flow of air moving over increasingly higher ground will be lifted adiabatically. Whether or not condensation will occur due to the upslope terrain will depend on the moisture content of the air.