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Material Based on Chapter 5

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  1. Material Based on Chapter 5 The Planetary Boundary Layer MT 454

  2. The Planetary Boundary Layer Class Slide MT 454

  3. Class Slide MT 454

  4. Class Slide MT 454

  5. Class Slide MT 454

  6. Class Slide MT 454

  7. Class Slide MT 454

  8. Class Slide MT 454

  9. Class Slide MT 454

  10. Red = w’(t) Blue = q’(t) Class Slide MT 454

  11. Class Slide MT 454

  12. Class Slide MT 454

  13. Class Slide MT 454

  14. Class Slide MT 454

  15. Class Slide is the radiative heating rate. Note: MT 454

  16. Class Slide MT 454

  17. Class Slide MT 454

  18. Class Slide MT 454

  19. Class Slide MT 454

  20. Class Slide MT 454

  21. Class Slide MT 454

  22. Class Slide MT 454

  23. Derive TKE Equation Similarly for v’ and w’

  24. Class Slide MT 454

  25. Class Slide • = Frictional dissipation (molecular diffusion) • > 0 TR = Redistribution by transport & pressure forces (no new TKE created) MT 454

  26. Class Slide MT 454

  27. Class Slide MT 454

  28. Analogue in large-scale flow: Class Slide How does this circulation lower center of mass? MT 454

  29. If PBL heated from below, then (z): BPL - TKE increase for unstable PBL BPL > 0 Primary energy source for unstable PBL (In stable PBL, BPL term gives energy loss) w’ < 0 ’ < 0 w’ > 0 ’ > 0 z 

  30. More precise (z) when well-mixed PBL is fully developed. Homogeneous, well-mixed layer Unstable layer maintained near surface by surface heating BPL - Side Note z 

  31. Class Slide MT 454

  32. Class Slide MT 454

  33. Class Slide MT 454

  34. Class Slide MT 454

  35. Class Slide MT 454

  36. Class Slide MT 454

  37. Class Slide MT 454

  38. Class Slide MT 454

  39. Class Slide MT 454

  40. Class Slide MT 454

  41. Class Slide MT 454

  42. Class Slide (See figures) MT 454

  43. Class Slide MT 454

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  45. Class Slide MT 454

  46. Class Slide MT 454

  47. Class Slide MT 454

  48. Class Slide MT 454

  49. Class Slide MT 454

  50. Class Slide (Add friction? See Figure 5.3 in Holton.) MT 454