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.

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Presentation transcript:

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.

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

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

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

11 – 12 Feb

A B

A 1.28mm

B

11 – 12 Feb

30 Jan – 2 Feb

A B

A 1.28mm

B

30 Jan – 2 Feb

2D-S Irregular Concentration vs WIBS4 FL Concentration

30 Jan – 2 Feb

Swift Transitions – 8 Feb

1.28mm

18 – 19 Feb

Wind Blown Snow??

Wind Blown Snow

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

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