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Unit 7: Atmospheric Stability and Instability

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Stability & Instability   ::   Inversions & Subsidence   ::   Instability & Fire Behavior   ::   Stability or Instability   ::   Summary   ::  Exercises

Exercise 1

Lifting processes for thunderstorm development

Match the various lifting processes with their definitions.

Lifting Process Definition
1. Orographic a. Air that is forced to rise as it is pushed against mountainous terrain.
2. Convergence b. The rising of warm air currents in the atmosphere as a result of surface heating.
3. Convection c. Lifting action which occurs when an air mass of one temperature meets another of differing temperature and other characteristics.
4. Frontal d. Rising air currents due to compression from air coming to a single point, such as in the center of a low pressure area.

Exercise 2

Determining atmospheric stability or instability

Describe the degree of stability or instability of the lower atmosphere in each of the situations below.

Question 1 Question 2
Question 1 Question 2
Question 3 Question 4
Question 3 Question 4
Question 5 Question 6
Question 5 Question 6
Copyright 2008, Michael Jenkins. Cite/attribute Resource . admin. (2005, November 10). Unit 7: Atmospheric Stability and Instability. Retrieved January 07, 2011, from Free Online Course Materials — USU OpenCourseWare Web site: This work is licensed under a Creative Commons License Creative Commons License