Determining Stability » Potential Instability Superadiabatic Lapse Rates from Layer Lifting

In evaluating the effect of lifting potentially unstable layers, one sometimes finds cases where a superadiabatic lapse rate appears to result. This may occur when the moisture content decreases sharply with height, as in "dry-type inversions." These conditions are frequently associated with subsidence and trade-wind inversions.
On this sounding, click the layer that you think is most likely to become superadiabatic with 100 hPa of lifting, as might occur with the passage of a fast-moving cold front.
The correct answer is the 800-750 hPa layer.
If you lift the layer 100 hPa, the saturated bottom cools at the moist (saturation) adiabatic lapse rate, and the unsaturated top cools at the dry adiabatic rate, resulting in a superadiabatic lapse rate in the 700-650 hPa layer.
If you lift the layer 100 hPa, the saturated bottom cools at the moist (saturation) adiabatic lapse rate, and the unsaturated top cools at the dry adiabatic rate, resulting in a superadiabatic lapse rate in the 700-650 hPa layer.
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