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On the twenty-first-century wet season projections over the Southeastern United States



The surface lifted index (SFI) is a measure of atmospheric stability. It is defined as the difference between the environmental air temperature at 500 mb and the temperature a parcel of air will achieve if lifted dry adiabatically to its lifting condensation level (LCL) and then lifted moist adiabatically to 500 mb. Positive values of SFI are considered to be stable, and negative values are considered unstable.

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Last updated: 24 March, 2014 @ 11:42 AM (KP)