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Introduction to Isentropic Analysis

Introduction to Isentropic Analysis. Review: Warm Air Advection. WAA means upward motion ( overrunning ) Start with First Law of Thermo:. Euler’s Equation. Generic lapse rates are positive . Temperature Tendency.

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Introduction to Isentropic Analysis

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  1. Introduction to Isentropic Analysis

  2. Review: Warm Air Advection • WAA means upward motion (overrunning) • Start with First Law of Thermo:

  3. Euler’s Equation Generic lapse rates are positive

  4. Temperature Tendency • Set the two equations equal to each other and solve for the local rate of change in temperature

  5. Temperature Tendency Continued . Frozen Wave Approximation: P

  6. Almost there… zero for adiabatic flow 30 35 40

  7. 12Z Surface Analysis 02/29/12

  8. L

  9. 12Z Composite Reflectivity

  10. Shortcomings… Only applies to one level (except for , of course) Indeed, overrunning air stream goes quickly to a new p or z level It would be really convenient to have only one surface to deal with…

  11. Isentropic Analysis Constant theta surface

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