Chapter 5- Cloud Development and Forms

9/25/99


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Table of Contents

Chapter 5- Cloud Development and Forms

How do we get clouds?

Orographic Lifting

Frontal Lifting

Convergence

Buoyancy

Stability of the air

Statically Stable VS Statically Unstable

Statically Unstable

Statically Stable VS Statically Unstable

Statically Stable

Air Parcel VS Atmosphere

Movement of an Air Parcel

Dry Adiabatic VS Wet Adiabatic

MtnSim_adiabat

Classification of the stability of the atmosphere

Absolutely Unstable Air (ELR > DALR)

Absolutely Unstable Air (ELR > MALR)

PPT Slide

Absolutely Stable Air (ELR < DALR)

Absolutely Stable Air (ELR < MALR)

Conditionally Unstable Air (DALR > ELR > MALR)

Factors that influence the ELR

Factors that influence the ELR

Factors that influence the ELR

Factors that influence the ELR

Limitations on the Lifting of Unstable Air

Limitations on the Lifting of Unstable Air

Extremely Stable Air: Inversions

Radiation Inversion

Frontal Inversion

Subsidence Inversion

Cloud Types

Classification of Clouds

High Clouds (prefix of “cirro”)

Characteristics of Cirrus Clouds

High Clouds (Cirrus)

High Clouds (Cirrus)

High Clouds (Cirrus)

High Clouds (Cirrus)

Characteristics of Cirrocumulus Clouds

High Clouds (Cirrocumulus)

High Clouds (Cirrocumulus)

High Clouds (Cirrocumulus)

Characteristics of Cirrostratus Clouds

High Clouds (Cirrostratus)

High Clouds (Cirrostratus)

High Clouds (Cirrostratus)

Middle Clouds (prefix of “alto”)

Characteristics of Altocumulus Clouds

Middle Clouds (Altocumulus)

Characteristics of Altostratus Clouds

Middle Clouds (Altostratus)

Middle Clouds (Altostratus)

Low Clouds

Characteristics of Stratus Clouds

Low Clouds (Stratus)

Low Clouds (Stratus)

Low Clouds (Stratus)

Characteristics of Nimbostratus Clouds

Low Clouds (Nimbostratus)

Low Clouds (Nimbostratus)

Low Clouds (Nimbostratus)

Characteristics of Stratocumulus Clouds

Low Clouds (Stratocumulus)

Low Clouds (Stratocumulus)

Clouds with vertical development (Cumulus and Cumulonimbus)

Characteristics of Cumulus Clouds

Cumulus humilis

Cumulus humilis

Cumulus Congestus

Cumulus Congestus

Characteristics of Cumulonimbus Clouds

Cumulonimbus

Cumulonimbus

Cumulonimbus

Unusual Clouds (Lenticular Clouds)

Unusual Clouds (Lenticular Clouds)

Unusual Clouds (Lenticular Clouds)

Unusual Clouds (Mammatus Clouds)

On all quizzes and exams

Please see me after class

Online Syllabus

September 24 Surface Map

Online Syllabus

paulca@iastate.edu

Author: Paul S. Castleberry

Email: paulca@iastate.edu