thermo_diagrams_[EDocFind.com] - Thermodynamic Diagrams...

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Thermodynamic Diagrams
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Thermodynamic Diagrams What are they and why do we need them? Need them to present & visualize thermodynamic processes They are used to keep track of how high in the atmosphere the air parcel is (P and z) and what temperature it has There are many other atmospheric variables on the thermo diagram so we can keep track of: whether the parcel of air is dry (or moist) or saturated, where clouds form (and how thick they are), how much precipitation may fall, how severe thunderstorms may get, what type of precipitation falls, etc. Another advantage … we can measure energy associated with parcels!
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Lines on a Tephigram Dry Adiabats – lines of constant lapse rate (DALR) Pseudo-adiabats or wet adiabats – lines of constant lapse rate (SALR) Temperature – in degrees Celsius Pressure – in millibars (mb) Mixing ratio – in g/kg Area between lifted parcel and environmental curve indicates stability
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Closer Look at the Tephi I s o t h e r m g n l i Deg F
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Closer Look at the Tephi m i x n g r a t o e s l d
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Closer Look at the Tephi a d i b t s o r n g e l
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Closer Look at the Tephi isobars – green solid lines (curved)
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Closer Look at the Tephi s a t u r e d i b o n g l ( c v ) also called psuedo-adiabats Note how SALR slope becomes Similar to DALR as w decreases!
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Use of Tephigram To assess stability Stable, unstable, conditionally unstable Stable, unstable, conditionally unstable (or conditional (or conditional instability) instability) Slope of the atmospheric profile or environmental lapse rate relative to SALR or DALR Steeper the slope (leaning more to the left with height), more unstable Remember lapse rates are negative so bigger number
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thermo_diagrams_[EDocFind.com] - Thermodynamic Diagrams...

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