Waarbij: lev = genomen drukniveau in hPa
vapr = 6.112*exp((17.67*td)/(td+243.5))
e = vapr*1.001+(lev-100)/900*0.0034
mixr = 0.62197*(e/(lev-e))*1000
dwpk = td+273.16
tlcl = 1/(1/(dwpk-56)+log(t/dwpk)/800)+56
theta = t*pow(1000/lev,0.286)
thetae = theta*exp((3.376/Tlcl-0.00254)*mixr*1.0+0.00081*mixr)
Edit: t & td = temperatuur in °K!
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