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Stable Equilibrium Unstable
?_________ ? Equilibrium
? ______ ? Equilibrium
Unsaturated Air Adiabatic cooling Adiabatic warming
Saturated Air (on the way up) Adiabatic cooling Adiabatic warming18 oC 18 oC Adiabatic warming 24 oC 28 oC 30 oC 38 oC
Stable Atmosphere Dry airLifted, unsaturated air at each level is colder and heavier than the air around it. If given the chance the parcel would return to its original position
Stable Atmosphere Moist air
Unstable Atmosphere Dry air
Unstable Atmosphere Moist Air air
Stable Atmosphere Dry air
Unstable Atmosphere Moist air
Making the air more stableDo Both Warm the air above Cool the air below
Making the air more unstableDo Both cool the air above warm the air below
Subsidence Inversion (creating a stable environment through sinking air) +4.6 km = + 46 °C +4.2 km = + 42 °C
More or Less Stable?
Convective instability(creating an unstable environment through rising air)
If θ/z = 0, the atmosphere is said to be neutral,or neutrally stratified, and the lapse rate is equal to the dry adiabatic lapse rate (DALR) Γ d ~= 10.
4. 2 Moist air thermodynamics (Reading Text
Cloud Development and Precipitation
LAB 6 10/16. Stability – Lapse Rate The rate at which a parcel cools as it rises. A dry* parcel cools at 10 degrees Celsius per kilometer***. A moist**
Cloud Development and Forms
Atmospheric Destabilization Processes Upper Level Mixed Layer Synoptic Lifting Dynamic Destabilization Differential Advection.
Part 2. Water in the Atmosphere Chapter 6 Cloud Development and Forms.
Copyright © 2010 R.R. Dickerson & Z.Q. Li 1 The Slice Method Chapt 4 page 51. A conceptual model accounting for compensating motion by ambient air as a.
Climatology Lecture 5 Michael Palmer Room 119, Atmospheric Physics ‘Vertical Motion in the Atmosphere’ …Continued...
Stability & Movement Figure 7.1 A rock, like a parcel of air, that is in stable equilibrium will return to its original position when pushed. If the rock.
Atmospheric Stability and Cloud Formation. RECAP Mechanical equilibrium: stable, unstable, neutral. Adiabatic expansion/compression: no heat exchange.
Vertical Air Motion. Air Parcels Ascend/Descend Adiabatically Expansional CoolingCompressional heating.
Tephigrams ENVI1400 : Lecture 8.
EG1204: Earth Systems: an introduction Meteorology and Climate Lecture 5 Atmospheric Instability.
Stability & Skew-T Diagrams
Textbook chapter 2, p chapter 3, p chapter 4, p Stability and Cloud Development.
Lecture 5.2: Stability Are you stable or unstable? Does it depend on the situation?
Outline Further Reading: Chapter 06 of the text book - stability and vertical motions - five examples - orographic precipitation Natural Environments:
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