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Adiabatic Sc model

Adiabatic Sc model. • Cloud Base constant = Zb. • CDNC constant = No • LWC ad = C w (Z-Zb). Inhomogeneous N  dilution + evaporation  v constant. Homogeneous N  dilution only  v  evaporation. 3.  V. 3.  VO. N / No. N / No. Entrainment - Mixing.

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Adiabatic Sc model

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  1. Adiabatic Sc model • Cloud Base constant = Zb • CDNC constant = No • LWCad = Cw (Z-Zb)

  2. Inhomogeneous N  dilution + evaporation v constant Homogeneous N  dilution only v  evaporation 3 V 3 VO N / No N / No Entrainment - Mixing

  3. VO(Zb) ? CB spatial variability Z6 Z6

  4. NO ? CDNC spatial variability

  5. NO ? Effect of CDNC variability

  6. Poirpoising section

  7. Poirpoising section

  8. Spectra variability

  9. Cloud top structures

  10. Mixing zone1 310 cm-3 202 cm-3 103 cm-3 40 cm-3

  11. Mixing zone2 283 cm-3 202 cm-3 160 cm-3 165 cm-3 70 cm-3

  12. Mixing zone3 650 m 280 cm-3 675 m 280 cm-3 660 m , 190 cm-3 650 m 140 cm-3 655 m , 125 cm- 3

  13. Conclusion - perpectives • Mixing diagram with 10 Hz data ( 10 m spatial resolution)  LWC reduction entirely due to CDNC reduction at cst MVD  Heterogeneous mixing (Dry air from FT is humidified by previous mixing events) • Cloud top structure: quasi-adiabatic regions: LWC  LWCad cst CDNC (No) and droplet spectrum mixed regions : 0 < LWC < LWCad 0 < N < No different spectra with   these featuresreflect different stages of the mixing process  Obj: document the statistics of these structures significant density of big droplets variable density of small droplets

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