aiRthermo (version 1.0)

Kindex: K Instability Index

Description

This function calculates the K instability index (Celsius) from a sounding given by the measured arrays pressure Ps (Pa) temperature Ts (K) and mixing ratio ws (kg/kg).

Usage

Kindex(Ps, Ts, ws, doLog = 0)

Arguments

Ps

A vector with pressure values (Pa) measured by the radiosonde.

Ts

A vector with temperature values (K) measured by the radiosonde.

ws

A vector with mixing ratio values (kg/kg) measured by the radiosonde.

doLog

Use logarithmic vertical interpolation between sounding levels. The default value is 0.

Value

This function returns the K index

Details

If needed levels (850, 700 and 500 hPa) are not found in the input sounding (without extrapolation), the function returns -99999999. Use/do not use logarithmic interpolation in pressure (if needed because mandatory levels such as 700 hPa or 500 hPa are not given in the sounding) when finding the requested levels.

Examples

# NOT RUN {
data(RadiosondeA)
aPs<-RadiosondeA[,1]*100
aTs<-C2K(RadiosondeA[,3])
aws<-RadiosondeA[,6]/1000
aK<-Kindex(aPs,aTs,aws,0)

data(RadiosondeD)
dPs<-RadiosondeD[,1]*100
dTs<-C2K(RadiosondeD[,3])
dws<-RadiosondeD[,6]/1000
dK<-Kindex(dPs,dTs,dws,0)
# }

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