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Stable Equilibrium Unstable
?_________ ? Equilibrium
? ______ ? Equilibrium
Adiabatic cooling Adiabatic warming Unsaturated Air
Adiabatic cooling Adiabatic warming Saturated Air (on the way up) 30 o C 24 o C 18 o C 28 o C 38 o C
Stable Atmosphere Lifted, 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 Dry air
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 stable Warm the air above Cool the air below Do Both
Making the air more unstable cool the air above warm the air below Do Both
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)
Key Terms and Concepts ELR--Environmental Lapse Rate 5°C- 6.5°C/1000 m – temperature of the STILL air as you ascend through the troposphere. ALR--Adiabatic.
Atmospheric Stability and Cloud Formation. RECAP Mechanical equilibrium: stable, unstable, neutral. Adiabatic expansion/compression: no heat exchange.
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**
Atmospheric Stability. Mechanical Equilibrium Equilibrium. Definition: ♦ The body is at rest ♦ The sum of all forces acting on the body is zero. Types.
Atmospheric Moisture Lapse Rate By K. Y. NG 105 Temp. °C Height (m) CondensationLevelDALR 10°C / 1000 m SALR 5°C.
Chapter 6. Importance of Clouds Release heat to atmosphere Help regulate energy balance Indicate physical processes.
Atmospheric Stability The resistance of the atmosphere to vertical motion. Stable air resists vertical motion Unstable air encourages vertical motion.
Textbook chapter 2, p chapter 3, p chapter 4, p Stability and Cloud Development.
Outline Further Reading: Chapter 06 of the text book - stability and vertical motions - five examples - orographic precipitation Natural Environments:
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Chapter 6 Stability and Cloud Development. Stability & Cloud Development This chapter discusses: 1.Definitions and causes of stable and unstable atmospheric.
Atmospheric Stability Terminology I Hydrostatic Equilibrium –Balance, in the vertical, between PGF and gravity –The general state of the atmosphere –Net.
CHAPTER 5 CLOUDS AND STABILITY CHAPTER 5 CLOUDS AND STABILITY.
ATS 351 ATS 351 Lecture 6 Stability & Skew-T Diagrams.
Atmospheric Destabilization Processes Upper Level Mixed Layer Synoptic Lifting Dynamic Destabilization Differential Advection.
METEO 003 LAB 6 Due Friday Oct. 17 th. Chapter 8 Question 1 a,b,c Radiosonde: instrument carried by a weather balloon to measure atmospheric variables.
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.
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.
MET 61 1 MET 61 Introduction to Meteorology MET 61 Introduction to Meteorology - Lecture 6 Stability Dr. Eugene Cordero San Jose State University W&H:
Thermodynamics, Buoyancy, and Vertical Motion Temperature, Pressure, and Density Buoyancy and Static Stability Adiabatic “Lapse Rates” Dry and Moist Convective.
Atmospheric Stability and Air Masses. Adiabatic Temperature Changes Adiabatic temperature changes occur when air is compressed or expands When it expands,
Meteo 3: Chapter 8 Stability and Cloud Types Read Chapter 8.
Atmospheric Stability. Stability of Atmosphere is affected by Temperature of the surrounding environment Temperature of the air parcel.
Moisture and Atmospheric Stability AOS 101 Discussion Discussion Leader – Val.
Lapse Rates and Stability of the Atmosphere. What is a lapse rate? A lapse rate is defined as the rate of change in temperature observed while moving.
Tephigrams ENVI1400 : Lecture 8. ENVI 1400 : Meteorology and Forecasting2 Tephigrams are thermodynamic diagrams – one of a range of such diagrams developed.
1 The Thermodynamic Diagram Adapted by K. Droegemeier for METR 1004 from Lectures Developed by Dr. Frank Gallagher III OU School of Meteorology.
Lab 9 – Due Nov 14 Chapter 13 10a,b,c Chapter 14 3a,b Chapter 15 1a,d 5a,b,c 6 8a,b,c 11a.
Vertical Motion and Temperature Rising air expands, using energy to push outward against its environment, adiabatically cooling the air A parcel of air.
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