Temperature Lapse Rate
Definition
The rate at which air temperature decreases with altitude. The standard lapse rate is approximately 2 degrees C per 1000 feet. When the actual lapse rate exceeds this, the atmosphere is unstable.
Why Temperature Lapse Rate Matters for Pilots
Weather concepts like Temperature Lapse Rate appear frequently on both FAA and EASA knowledge exams. More importantly, understanding Temperature Lapse Rate helps pilots make sound go/no-go decisions and avoid hazardous conditions in flight. Weather-related accidents remain a leading cause of general aviation incidents.
Exam Tip
This concept is commonly tested in meteorology-related questions on FAA and EASA exams. Make sure you can explain Temperature Lapse Rate in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
Related Terms
International Standard Atmosphere(ISA)
A model atmosphere used for aircraft performance calculations. At sea level: 15 ...
Atmospheric Stability
The tendency of the atmosphere to resist or enhance vertical motion. Stable air ...
Temperature Inversion
A layer of atmosphere where temperature increases with altitude instead of decre...
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