1. Microphysics Measurements During CLACE 2014 G.J. Lloyd 1, R. Farrington, P.Connolly 1 T.W. Choularton 1, M. Gallagher 1 and K. N. Bower 1 1 Centre for Atmospheric Science, SEAES, University of Manchester, M13 9PL, Manchester, U.K.

2. Priority Cases 30 Jan – 2 Feb Saharan Dust Event 8 – 9 Feb Liquid/Ice transitions 18 – 19 Feb Saharan Dust 11 – 12 Feb Inc/Dec Ice Fractions 14 Feb Further ice/liq fluctuations

3. Aims Identify periods of changing microphysics – Short term fluctuations (seconds) – Larger temporal scale changes (hours) Are these changes associated with something? – Temperature – Wind – Aerosol

4. Instrumentation 3VCPI (2DS) Measurement of cloud particles 10 < d p < 1280 µm Discrimination of lce/Liquid CDP Measurement of liquid droplets 2 < d p < 50 µm WIBS4 Aerosol Measurements

5. 11 – 12 Feb

6. A B

7. A 1.28mm

8. B

9. 11 – 12 Feb

10. 30 Jan – 2 Feb

14. A B

15. A 1.28mm

16. B

17. 30 Jan – 2 Feb

18. 2D-S Irregular Concentration vs WIBS4 FL Concentration

19. 30 Jan – 2 Feb

20. Swift Transitions – 8 Feb

21. 1.28mm

25. 18 – 19 Feb

29. Wind Blown Snow??

30. Wind Blown Snow

32. Conclusions Transitions between liquid and glaciated conditions frequent Significant ‘Saharan’ dust events identified Some signs of a correlation between inc ice and inc fluorescent aerosol? Wind blown snow may not contribute significantly