1. Team Scalar and Momentum Advection
Assignment #1
Kirstin Gleicher, Michelle Pitcel, and Andrew Rosenow

2. Simulation Differences
Used Milbrandt microphysics scheme
Altered momentum and scalar advection closure order
Control Run
Momentum was 5th order
Scalar was 3rd order
Experimental Run
Momentum was 4th order
Scalar was 2nd order

3. Reflectivity Images

4. Mesocyclone Tracking AlgorithmΔx
Looks for the first time with precipitation (reflectivity)
Finds the maximum column-average vorticity
Searches for the next vorticity maximum in two moving domains-one for each post-split supercell
Δx, Δy = 10 km
Left
Mover
Domain Δy
Previous meso location
Right
Mover
Domain Δy Δx

5. Reflectivity
Images
Experiment Run
Control Run

6. Reflectivity
Images
Experiment Run
Control Run

7. Reflectivity
Images
Experiment Run
Control Run

8. Reflectivity
Images
Experiment Run
Control Run

9. Reflectivity
Images
Experiment Run
Control Run

10. Reflectivity
Images
Experiment Run
Control Run

11. Reflectivity
Images
Experiment Run
Control Run

12. Reflectivity
Images
Experiment Run
Control Run

13. Reflectivity
Images
Experiment Run
Control Run

14. Reflectivity
Images
Experiment Run
Control Run

15. Reflectivity
Images
Experiment Run
Control Run

16. Reflectivity
Images
Experiment Run
Control Run

17. Reflectivity
Images
Experiment Run
Control Run

18. Reflectivity
Images
Experiment Run
Control Run

19. Reflectivity
Images
Experiment Run
Control Run

20. Reflectivity
Images
Experiment Run
Control Run

21. Reflectivity
Images
Experiment Run
Control Run

22. Reflectivity
Images
Experiment Run
Control Run

23. Reflectivity
Images
Experiment Run
Control Run

24. Reflectivity
Images
Experiment Run
Control Run

25. Reflectivity
Images
Experiment Run
Control Run

26. Reflectivity
Images
Experiment Run
Control Run

27. Reflectivity
Images
Experiment Run
Control Run

28. Reflectivity
Images
Experiment Run
Control Run

29. Reflectivity
Images
Experiment Run
Control Run

30. Reflectivity
Images
Experiment Run
Control Run

31. Reflectivity
Images
Experiment Run
Control Run

32. Reflectivity
Images
Experiment Run
Control Run

33. Reflectivity
Images
Experiment Run
Control Run

34. Reflectivity
Images
Experiment Run
Control Run

35. Reflectivity
Images
Experiment Run
Control Run

36. Reflectivity
Images
Experiment Run
Control Run

37. Reflectivity
Images
Experiment Run
Control Run

38. Reflectivity
Images
Experiment Run
Control Run

39. Planview Plots

40. Reflectivity
Images
Experiment Run
Control Run

41. Vorticity Tendency – m

42. Vorticity Tendency – 1km

43. Vorticity Tendency – 4km

44. Vorticity Tendency – 10km

45. Timeseries Plots

46. Advection Red = Experimental Blue = Control S-1 S-1 Time Step

47. Divergence Red = Experimental Blue = Control S-1 S-1 Time Step

48. Stretching Red = Experimental Blue = Control S-1 S-1 Time Step

49. Solenoidal Red = Experimental Blue = Control S-1 S-1 Time Step

50. Vorticity Tendency Red = Experimental Blue = Control S-1 S-1
Comparison of Maximum in Total Vorticity Tendency at 1km
Red = Experimental
Blue = Control
Comparison of Maximum in Total Vorticity Tendency at 5km
Comparison of Maximum in Total Vorticity Tendency at 10km
S-1
S-1
Time Step
Time Step

51. Conclusions
Changing Advection schemes causes spurious waves to propagate throughout the model domain.
May need to change resolution if changing advection schemes
Despite the waves, simulated supercell showed similar structure within models runs.