1. BBC/4DC meeting Leipzig 13.-16.05.02 Structure of microphysical cloud parameters in Cu and StCu clouds during the BBC/4D-Clouds field campaign at Cabauw in September 2001 Dr. Dagmar Nagel GKSS Research Center Geesthacht Institute for Coastal Research Max-Planck-Strasse 1 D 21502 Geesthacht Germany Email: dagmar.nagel@gkss.de BBC/4DC meeting Leipzig 13.-16.05.02

2. 1. Instrumentation 1.1 Aircraft 1.2 Probes 2. Calibration 4. Results 5. Outlook 2.1 Absolute sizing 2.2 Highspeed calibration 4.1 Products 4.2 Examples from the field campaign

3. BBC/4DC meeting Leipzig 13.-16.05.02 Merlin IV of Meteo France with PMS probes 1. Instrumentation

4. BBC/4DC meeting Leipzig 13.-16.05.02 1. Instrumentation PMS FSSP-ER / PMS FSSP-100 PMS OAP 2D2-CPMS OAP 2D2-P Nevzorov probe Size range between 2 µm to 6.4 mm

5. BBC/4DC meeting Leipzig 13.-16.05.02 2. Calibration Absolute calibration with monodisperse droplet generator

6. BBC/4DC meeting Leipzig 13.-16.05.02 2. Calibration Highspeed calibration at 100 m/s – determination of the sample volume Measurement X Z Y filter DOF Definition particle flow sample volume : concentration : d Signal (red) and annulus (blue) produced by a glass fiber

7. BBC/4DC meeting Leipzig 13.-16.05.02 2. Calibration Highspeed calibration at 100 m/s – determination of the sample volumn DOF as function of different materials at low speeds (2 m/s) for FSSP-ER, range 0

8. BBC/4DC meeting Leipzig 13.-16.05.02 2. Calibration Highspeed calibration at 100 m/s – determination of the sample volume DOF als Funktion der Geschwindigkeit

9. BBC/4DC meeting Leipzig 13.-16.05.02 2. Calibration Highspeed calibration at 100 m/s – channel shift Channel shift measured with FSSP-100 at speeds between 15 m/s and 100 m/s

10. BBC/4DC meeting Leipzig 13.-16.05.02 3. Calculation procedure Combination of single spectra from all three probes for 10s periods Products: number concentration effective radius water content effective radius number concentration liquid and ice water content Time series of every flight section for every probe for Spectra of every probe for every flight section 10s time series of bulk data like 10s merged spectra of all three probes

11. BBC/4DC meeting Leipzig 13.-16.05.02 3. Calculation procedure Combination of single spectra from all three probes for 10s periods 23.09.01 Merlin flight 45, leg 313.09.01 Merlin flight 41, leg 8 25 % limit 50 % limit

12. BBC/4DC meeting Leipzig 13.-16.05.02 111.09.0140S1 – S2 – S4 4 +2 partly 880 -1200 m6590 – 2400 m 213.09.0141S1 – B58900 – 2400 m- 320.09.0142S1 – S3 5454 1840 – 2050 m 1820 – 2340 m 31230 – 2670 m 422.09.0144S1 – S3 523.09.0145S1 – S37570 – 1210 m9580 – 1200 m 623.09.0146S1 – S36740 – 1360 m- 725.09.0147S1 – S24590 – 920 m1600 – 3160 m 826.09.0148S1 – S2 3 + 5 partly 590 – 1840 m6580 – 2720 m 927.09.0149S1 – S5 1 + 3 partly 610 – 1550 m12620 – 1540 m 4. Results Data overview DateNo.Merlin flightbetweenhor. legssoundingsbetween Not useable due to missing data! 4 5 6 7 8

13. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 13.09.01 13.09.01 09:32:00 leg 1, 907 m

14. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 13.09.01 Typical size and volume distribution at leg 1, 907 m

15. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 13.09.01 Effective radius and total water content between S1 and B5

16. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 13.09.01 Liquid and ice water content between S1 and B5

17. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 20.09.01 20.09.01 12:21:06 leg 5, 2036 m

18. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 20.09.01 Effective radius and total water content between S1 and S3, part 2

19. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 20.09.01 Liquid and ice water content between S1 and S3, part 2

20. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 20.09.01 Decent (black) at the beginning and decent (red) and ascent (green) at the end of the flight between S1 and S3

21. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 23.09.01 23.09.01 13:28:40 leg 3, 892 m

22. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 23.09.01 Liquid water content and number concentration between S1 and S3

23. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 23.09.01 Effective radius and liquid water content between S1 and S3

24. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 25.09.01 25.09.01 14:21:10 leg 1, 644 m

25. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 25.09.01 Effective radius and liquid water content between S1 and S2

26. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 25.09.01 25.09.01 15:10:50 ascent next to Cabauw

27. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 25.09.01 Ascent at Cabauw (black) and horizontal legs (colored) between S1 and S2

28. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 27.09.01 27.09.01 10:44:32 leg 4, 915 m

29. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 27.09.01 Effective radius and water content at leg 3 (open symbols) and leg 4 (solid symbols) between S1 and S5

30. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 27.09.01 Typical size and volumn distribution between 917 m and 1522 m height next to Cabauw

31. BBC/4DC meeting Leipzig 13.-16.05.02 4. Results 27.09.01 Typical size and volumn distribution between 935 m and 1307 m height in a Cumulus cloud at leg 4

32. BBC/4DC meeting Leipzig 13.-16.05.02 5. Outlook Improvement of the algorithm for the combination of single spectra Comparison with data from Nevzorov probe and PVM Detailed comparison to measurements of ground-based radar