1. The set up of the RICO intercomparison case Louise Nuijens, A. Pier Siebesma and Margreet van Zanten Photo courtesy Bjorn Stevens KNMI and Wageningen University, The Netherlands

2. Initial objective to focus one single day: January 11 th 2004 –Almost complete suite of measurement facilities present –Average amount of precip : 0.6 mm/day

3. However, not the best choice: 1.Atmospheric state variable during the day 2.No way to derive LS-budget for one specific day 3.LES results create too vigorous clouds

4. Alternative: Construct a composite based on a suppressed period from 16/12/04 till 08/01/05 Average precip in this period: 0.34 mm/day

5. Average Soundings for this period

6. To obtain LS forcings: Use a high-res hindcast for the whole RICO period.

7. Total rainfall rate RACMO

8. Large Scale Forcings: subsidenceHor. q-advection Hor. T-advection

9. Radiative Tendency

10. Surface Conditions

11. Budget Analysis -15 -36 + 75 -69 +5 + 10 -6 -11 -125 + 140 - 10 0.3K/day 0.05 g/kg /day

12. SCM vs LES profiles

13. RICO vs BOMEX

14. Microphysics Flight Nc [cm -3 ]Precipitation [Wm -2 ] RF06 63.5 +/- 56.1 22.5 +/- 0.8 RF07 30.4 +/- 23.7 5.5 +/- 0.4 RF08 40.9 +/- 36.3 22.5 +/- 0.5 RF09 44.5 +/- 35.0 6.2 +/- 0.2 RF010 47.4 +/- 43.7 12.1 +/- 0.8 RF011 52.7 +/- 59.2 12.7 +/- 0.6 Nc of case study set to 45

15. What is a cloud? (or how to define a cloudy/rainy gridcell?) Set up: q c or N r > 0 (or  ) -> not so useful for bin models We need a physically based threshold! Choices:* threshold based on q c /q r or N c /N r * waterweighted (to calculate mean N) Preferentially one which is suitable for RICO data analysis as well.

16. DALES sensitivity

17. RAMS@NOAA sensitivity

18. DHARMA sensitivity

19. Threshold Based on q c and q r : 0.01and 0.001 g/kg Based on N r 5 per liter Photo courtesy Bjorn Stevens