<Li> From the initial dew point temperature (Td) of the parcel at its starting pressure, follow the line for the constant equilibrium mixing ratio (or "saturation mixing ratio") upward . </Li> <Li> The intersection of these two lines is the LCL . </Li> <P> Until recently, it was thought that there was no exact, analytic formula for the LCL . In 2017, the exact, analytic, and explicit expression for the temperature, pressure, and height of the LCL was derived by David Romps: </P> <Dl> <Dd> T LCL = c (W − 1 (RH l 1 / a c e c)) − 1 T p LCL = p (T LCL T) c p m / R m z LCL = z + c p m g (T − T LCL) a = c p m R m + c v l − c p v R v b = − E 0 v − (c v v − c v l) T trip R v T c = b / a, (\ displaystyle (\ begin (alignedat) (1) T_ (\ text (LCL)) & \; \; = \; c \ left (W_ (- 1) \ left ((\ text (RH)) _ (l) ^ (1 / a) \, c \, e ^ (c) \ right) \ right) ^ (- 1) T \ \ p_ (\ text (LCL)) & \; \; = \; p \ left ((\ frac (T_ (\ text (LCL))) (T)) \ right) ^ (c_ (pm) / R_ (m)) \ \ z_ (\ text (LCL)) & \; \; = \; z+ (\ frac (c_ (pm)) (g)) \ left (T - T_ (\ text (LCL)) \ right) \ \ a& \; \; = \; (\ frac (c_ (pm)) (R_ (m))) + (\ frac (c_ (vl) - c_ (pv)) (R_ (v))) \ \ b& \; \; = \; - (\ frac (E_ (0v) - (c_ (vv) - c_ (vl)) T_ (\ text (trip))) (R_ (v) T)) \ \ c& \; \; = \; b / a \,, \ end (alignedat))) </Dd> </Dl>

Where can you see the lifting condensation level and what is the evidence for its existence