On an energetic index for local instability

L. J. RIVAS SORIANO, E. L. GARCÍA DIEZ

Abstract

In a previous work an energetic index for local instability (IR) was introduced. This index is defined as the difference between moist static energy (h) at 850 hPa pressure level and saturated static energy (h*) at 500 hPa pressure level. In this paper IR is evaluated from 245 soundings over Spain (Madrid-Barajas) and other European points (Rome, Berne, Vienne, Bordeaux and Paris). From this evaluation the operative applicability of this index is shown. In the same way index values are related to instability (taking into account several types of instability) and probability of convective hydrometeors. Furthermore a comparison between IR, Showalter, and Total Totals indexes is made.

 

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