1 / 139

IHOP 2002 Radar Observations & Moisture Dynamics Analysis

Explore refractivity observations by radar during IHOP 2002 to analyze moisture dynamics and boundary effects. Learn about surface moisture patterns, wind influences, and practical implications.

emckee
Download Presentation

IHOP 2002 Radar Observations & Moisture Dynamics Analysis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Highlights of Refractivity Observations by Radar (and Some More) during IHOP_2002 Frédéric Fabry and ShinJu Park McGill University Montréal, Canada

  2. A Few Definitions IHOP_2002: International H2O Project. Its goal: Determine how much does knowing 4-D H2O distribution help in QPF. Refractivity (N): A quantity related to the index of refraction (n) of air: N = 106(n−1) = 77.6 P/T + 373000 e/T2. Surface N can be measured by radar up to a range of about 50 km using ground targets. Since over that range, P and T are (fairly) uniform, N can be used to infer e and Td.

  3. IHOP: Instrumentation Deployment

  4. IHOP: S-Pol

  5. IHOP: Ground Targets at S-Pol Liberal KS OK Early fears that ground targets would be in short supply in the Panhandle were unfounded, thanks to unburied power/phone lines, farms, elevators… Hooker Beaver Beaver R. valley Homestead OK TX Booker Perryton

  6. Rapid moistening Storm Outflow Wet Real-Time/Default Display 60 Diurnal cycle (mostly) Dry Wet

  7. Example: Surface Moistening, 25 May Sunny, cool, calm morning; will warm quickly Anomalous propagation echoes Previous rain No wind (!) Maximizes local effects

  8. Example: Surface Moistening, 25 May Previous rain

  9. Example: Surface Moistening, 25 May Previous rain

  10. Example: Surface Moistening, 25 May Previous rain

  11. Example: Surface Moistening, 25 May Previous rain

  12. Example: Surface Moistening, 25 May Previous rain

  13. Example: Surface Moistening, 25 May Previous rain

  14. Example: Surface Moistening, 25 May Previous rain

  15. Example: Surface Moistening, 25 May Previous rain

  16. Example: Surface Moistening, 25 May Previous rain

  17. Example: Surface Moistening, 25 May Previous rain

  18. Example: Surface Moistening, 25 May Previous rain

  19. (g m-2 s-1) 360 W 120 W Flux computed thanks to a lot of crude assumptions (too high contrast expected) Example: Surface Moistening, 25 May Previous rain

  20. Example: Surface Moistening, 25 May

  21. Example: Surface Moistening, 25 May

  22. Example: Surface Moistening, 25 May

  23. Example: Surface Moistening, 25 May

  24. Example: Surface Moistening, 25 May

  25. Example: Surface Moistening, 25 May

  26. Example: Surface Moistening, 25 May

  27. Example: Surface Moistening, 25 May

  28. Example: Surface Moistening, 25 May Previous rain Note how “fragile” the moisture patch was under light winds

  29. Contrasting Example: 29 May 72 hrs later, on a sunny day prior to 29 May No wind again. Maximizes local effects Some weak differential moistening

  30. Contrasting Example: 29 May

  31. Contrasting Example: 29 May

  32. Contrasting Example: 29 May

  33. Contrasting Example: 29 May

  34. Contrasting Example: 29 May East winds building up

  35. Contrasting Example: 29 May East winds building up

  36. Contrasting Example: 29 May East winds building up

  37. Moisture boundary Contrasting Example: 29 May East winds building up

  38. Moisture boundary Contrasting Example: 29 May

  39. Moisture boundary Contrasting Example: 29 May

  40. Moisture boundary Contrasting Example: 29 May

  41. Moisture boundaries Contrasting Example: 29 May Winds shift to SE behind 2nd boundary

  42. Moisture boundaries Contrasting Example: 29 May Winds shift to SE behind 2nd boundary

  43. Moisture boundaries Contrasting Example: 29 May Winds shift to SE behind 2nd boundary

  44. Moisture boundaries Contrasting Example: 29 May Winds shift to SE behind 2nd boundary

  45. Contrasting Example: 29 May

  46. Contrasting Example: 29 May

  47. Contrasting Example: 29 May

  48. Contrasting Example: 29 May

  49. Contrasting Example: 29 May

  50. Contrasting Example: 29 May

More Related