Stability & Adiabatics
Lift a parcel of air through a real atmosphere with ELR, DALR and SALR to see whether it rises or sinks
Stability & Adiabatics is part of lifetime access
Log in if you already have lifetime access, or unlock all 53 simulators, the full question bank and every flashcard for ₹3,499.
Or try the free ones: Wind Triangle and Altimeter.
Your account is on the free plan. Unlock all 53 simulators, the full question bank and every flashcard for ₹3,499, once.
Practise the questions
Stability & Adiabatics93 questionsRevise with flashcards
Stability & Adiabatics17 cardsMore Meteorology simulators
Altimeter SettingFreeDensity AltitudeLifetimeCloud Heights & FormsLifetimeFrontal PassageLifetimeWhat to try
- Pick Conditionally unstable and press Lift and release to see the parcel climb, form cloud and keep rising.
- Switch to Stable and see it sink back. Then try the inversion, which stops the parcel at once.
- Raise the surface temperature and the dew point spread. Watch cloud base move up by about 400 ft for each degree of spread.
- Compare the three lapse rates on the readout: ELR, DALR 3°C per 1000 ft and the SALR, which changes with the air.
Exam point
ELR below SALR: absolutely stable. ELR above DALR (3°C per 1000 ft): absolutely unstable. ELR between SALR and DALR: conditionally unstable. A parcel keeps rising only while it is warmer than the air around it.
Study aid only. Figures here are simplified and fictional, so always use current DGCA and ICAO documents and the approved manual for real operations.