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ATMOS Final UPDATED Actual Exam Questions and CORRECT Answers

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ATMOS Final UPDATED Actual Exam Questions and CORRECT Answers Microburst - CORRECT ANSWER- an intense small-scale downdraft produced by a thunderstorm or rain shower Thunderstorm - CORRECT ANSWER- a small storm produced by a cumulonimbus cloud and always accompanied by lightning and thunder...

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  • September 14, 2024
  • 26
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ATMOS
  • ATMOS
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MGRADES
ATMOS Final UPDATED Actual Exam
Questions and CORRECT Answers
Microburst - CORRECT ANSWER✔✔- an intense small-scale downdraft produced by a
thunderstorm or rain shower


Thunderstorm - CORRECT ANSWER✔✔- a small storm produced by a cumulonimbus
cloud and always accompanied by lightning and thunder


a consequence of atmospheric instability and constitutes an overturning of air layers in order
to achieve a more stable density stratification


Determining Stability - CORRECT ANSWER✔✔- 1. Temperature of the parcel (T parcel)


2. Temperature of the environment
(T environment)


Unstable or stable? - CORRECT ANSWER✔✔- If Tparcel > Tenvironment continues to rise
vertically-> Unstable


If Tparcel < Tenvironment sinks back to original position -> Stable


Dry Adiabatic Lapse Rate (DALR) - CORRECT ANSWER✔✔- Parcels that are not saturated


DALR = Γdry = 10C / km


Lifting Condensation Level (LCL) - CORRECT ANSWER✔✔- The altitude at which a
parcel of air reaches saturation (RH=100%) and a cloud forms


Parcel will then rise at moist adiabatic lapse rate

,Moist (Wet) Adiabatic Lapse Rate (MALR) - CORRECT ANSWER✔✔- The process of
condensation releases heat - this heat causes the air parcel to not cool as quickly


(varies from 5 - 9C / km) Γmoist ≈ 6C / km


Conditional Instability - CORRECT ANSWER✔✔- Stable unsaturated air that will result in
instability in the event that the air becomes saturated


Lower atmosphere must have a lot of moisture


Where meteorologists look for thunderstorms - CORRECT ANSWER✔✔- Meteorologists
look for regions with high dew points as a first guess of where thunderstorms might occur


Level of Free Convection (LFC) - CORRECT ANSWER✔✔- The altitude at which a lifted
saturated air parcel first becomes warmer than the environment


If a parcel can reach its LFC, it's free!


Equilibrium Level (EQ) - CORRECT ANSWER✔✔- The altitude at which a freely rising
saturated air parcel cools to its environment • Convection stops • Often near the tropopause


3 Requirements for Formation

Of Thunderstorm - CORRECT ANSWER✔✔- • Moisture (high Td)
• need unstable or conditionally unstable atmosphere
• way to lift air


Single-Cell Thunderstorms size - CORRECT ANSWER✔✔- 10 miles



Squall lines size - CORRECT ANSWER✔✔- on order of 100+ miles wide; 1000 miles long



Super cells size - CORRECT ANSWER✔✔- cloud up to 100 miles; rain area on order of 40-
50 miles

, Single-Cell Thunderstorms (time) - CORRECT ANSWER✔✔- an hour or so



Squall lines (time) - CORRECT ANSWER✔✔- several hours to a day or more



Supercells (time) - CORRECT ANSWER✔✔- several hours



Most Thunderstorms are.....? - CORRECT ANSWER✔✔- Most thunderstorms are of the
ordinary variety


Termed: • Air-Mass Thunderstorms • Single Cell Thunderstorms


• Rather benign
• Resulting from the intrusion of maritime tropical (mT) air northward over land
• Produces scattered (non-organized) or isolated cells


entrainment - CORRECT ANSWER✔✔- Mixing of cooler, drier air into cloud


Rising parcels in a cumulus cloud MIX with their environment


lifecycle of a thunderstorm - CORRECT ANSWER✔✔- 1. Cumulus Stage


2. Mature Stage


3. Dissipating Stage


Cumulus Stage - CORRECT ANSWER✔✔- Updrafts dominate
• Entrainment causes evaporation
• Evaporation is a cooling process
• Cooling air sinks and reduces buoyancy

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