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Published byMaria Daugherty
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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)
Atmospheric Stability and Cloud Formation. RECAP Mechanical equilibrium: stable, unstable, neutral. Adiabatic expansion/compression: no heat exchange.
Atmospheric Moisture Lapse Rate By K. Y. NG 105 Temp. °C Height (m) CondensationLevelDALR 10°C / 1000 m SALR 5°C.
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.
Outline Further Reading: Chapter 06 of the text book - stability and vertical motions - five examples - orographic precipitation Natural Environments:
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.
Chapter 6. Importance of Clouds Release heat to atmosphere Help regulate energy balance Indicate physical processes.
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**
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:
Atmospheric Stability Terminology I Hydrostatic Equilibrium –Balance, in the vertical, between PGF and gravity –The general state of the atmosphere –Net.
Lecture 5.2: Stability Are you stable or unstable? Does it depend on the situation?
Chapter 6 Stability and Cloud Development. Stability & Cloud Development This chapter discusses: 1.Definitions and causes of stable and unstable atmospheric.
CHAPTER 5 CLOUDS AND STABILITY CHAPTER 5 CLOUDS AND STABILITY.
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.
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.
Stability & Skew-T Diagrams
Vertical Air Motion. Air Parcels Ascend/Descend Adiabatically Expansional CoolingCompressional heating.
Atmospheric Destabilization Processes Upper Level Mixed Layer Synoptic Lifting Dynamic Destabilization Differential Advection.
Atmospheric Stability and Air Masses
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.
Part 2. Water in the Atmosphere Chapter 6 Cloud Development and Forms.
Lapse Rates and Stability of the Atmosphere
Moisture and Atmospheric Stability
1 The Thermodynamic Diagram Adapted by K. Droegemeier for METR 1004 from Lectures Developed by Dr. Frank Gallagher III OU School of Meteorology.
Chapter 11 Section 2 State of Atmosphere. Temperature vs. Heat Temperature: measures the movement of molecules Faster = Warmer Slower = Colder Measured.
Meteo 3: Chapter 8 Stability and Cloud Types Read Chapter 8.
4. 2 Moist air thermodynamics (Reading Text
Water in the Atmosphere Water vapor in the air Saturation and nucleation of droplets Moist Adiabatic Lapse Rate Conditional Instability Cloud formation.
ThermodynamicsM. D. Eastin We just the covered the large-scale hydrostatic environment… We now need to understand whether a small-scale moist air parcel.
Thermodynamics, Buoyancy, and Vertical Motion
Air stability problem Surface air = 35 o C 4000m = -10 o C Dewpoint = +10 o C.
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.
Lab 6: Saturation & Atmospheric Stability
Skew T Log P Diagram AOS 330 LAB 10 Outline Static (local) Stability Review Critical Levels on Thermodynamic Diagram Severe Weather and Thermodynamic.
Tephigrams ENVI1400 : Lecture 8.
Chapter 4 Moisture and Atmospheric Stability. Steam Fog over a Lake.
Weather Cloud Formation May 19, Adiabatic Temperature Changes When air is allowed to expand, it cools, and when its is compressed, it warms. Do.
Water can exist in 3 phases, depending upon pressure and temperature.
Humidity, Saturation, and Stability
A Major Component of Earth’s Weather. The Hydrologic Cycle Water can exist as a solid, liquid, or gas on Earth. The movement of water from different reservoirs.
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.
Cloud Development and Precipitation
Section 04 Adiabatic Processes and Stability Lessons 12 & 13.
Cloud Development and Forms
Atmospheric Stability & Instability
* Reading Assignments: All Sections. 8. Hydrostatic Stability Describe the states of vertical stratification of atmosphere: * Stable equilibrium * Unstable.
Lesson 15 Adiabatic Processes
Climatology Lecture 5 Michael Palmer Room 119, Atmospheric Physics ‘Vertical Motion in the Atmosphere’ …Continued...
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