1 / 28

UWKA and WCR

UWKA and WCR. Data summaries, issues, problems, availability, etc WCR data processing : Dave Leon, Sam Haimov, Rick Damiani UWKA data processing: Glenn Gordon, Perry Wechsler, Larry Oolman Students: Qun Miao (PhD), Tim Trudel (MS). http://flights.uwyo.edu/ihop02/. date. UWKA data.

yanka
Download Presentation

UWKA and WCR

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. UWKA and WCR Data summaries, issues, problems, availability, etc WCR data processing : Dave Leon, Sam Haimov, Rick Damiani UWKA data processing: Glenn Gordon, Perry Wechsler, Larry Oolman Students: Qun Miao (PhD), Tim Trudel (MS) http://flights.uwyo.edu/ihop02/

  2. date UWKA data location WCR times UTC WCR modes* comments WCR echo strength CI Coordination with P-3 Falcon S-POL armada 5/22 all OK Homestead 21:45-23:43 VPDD (5), UD (2), P (2) Clear dryline, with deeper drier BL to the west good none + - + + Tornado radar 5/24 all OK Shamrock 18:53-21:13 VPDD (7), UD (4) 6 dryline transects (2 at low levels), 11 cold-front transects (4 at low levels) very good east of cold front, but aligned with it + + - + 6/02 Heiman dead Garden City 21:07-23:30 UP (3), P (1), nadir beam dead 2 microbursts, some hi-based precip poor none + - - - 6/03 Heiman dead Liberal 17:14-20:41 22:33-23:45 VPDD (11), UD (2) 12 legs across a weakening cold front, 1 leg along it mediocre none + - + + mips Tornado radar 6/9 all OK Guymon [17:00-19:09] all beams dead 1 long E-W low-level leg into NM, 3 UWKA soundings - none + - - + 6/10 all OK north of Dodge City [18:56-22:20] all beams dead line-normal stack, 11 legs between 160-1500 m AGL, plus 2 soundings - vigorous, within IOR + - - + 6/12 all OK east of Homestead 17:50-22:00 VPDD (15), UD (4) N-S line-normal stack, none parallel to the ‘fat-line’ good on a fine line, east of the boundary we sampled + - + + 6/15 all OK Dumas 17:39-20:57 VPDD (8), UD (4) E-W line-normal stack, none parallel of the diffuse boundary mediocre none + + (+) + 6/18 all OK Sublette 17:48-22:03 VPDD (6), UD (6) ESE-WNW line-normal stack, none parallel; followed retreating line well mediocre within IOR, but benign + - - + 6/19 all OK Goodland 17:48-22:03 VPDD (7), UD (3), UP (4), P(1) ESE-WNW line-normal stack, one excellent parallel leg good excellent CI sampled + - - +

  3. Summary case study priorities 5/24: highest priority 6/19: high priority 6/12: priority 5/22, 6/3, 6/15, 6/18: possible use (more for intercomparison than for CI case study) Other CI data (purple in previous table): no interest

  4. Wyoming Cloud Radar 95 GHz (3 mm) - Doppler

  5. c c WCR through nadir port Vertical-Plane Dual-Doppler w = -Vn -winsects u = Vf - Vn - uinsects sina tana --> extract circulation (u,w) below AC a

  6. name mode antenna PRF (kHz) pulse (ns) # rg Dr (m) Rmax (m) Flight legs (height AGL) WCR operational modes A-250-SPP SPPmag side 20 225 150 30 4500 CI – along @ ~200 m [default] A-PP4 PPmag4 side 10/15/20 225 150 30 4500 CI – along @ ~200 m [try] A-500-SPP SPPmag side 10 500 150 50 7.5 km CI – along @ ~200 m [try] ABL - @ 0.55 & 0.8 Zi [try] CI – across @ 0.6 Zi [try] low-SPP SPPmag up 20 225 150 15 2250 CI – across @ ~200 m [default] ABL – 50 m & 0.25 Zi [default] bore @ 300 m [default] X-lo-PP4 PPmag4 VPDD 20 225 100 15 1500 CI – across @ 0.6 Zi [default] ABL – @ 0.55 Zi and 0.8 Zi [try] X-hi-PP4 PPmag4 VPDD 20 (10 between bursts) 225 100 30 3000 (z) 2600 (xz) CI – across and box @ 1.5 Zi [default] ABL – @ 0.5 Zi [try] ABL – @ 1.2 Zi [default] M-PP4 PPmag4 nadir/up 20 (10 between bursts) 225 100 15 1500 up 1500 dn ABL – @ 30 m [when feeling lousy] ABL – @ 0.5 Zi [default] CI – across @ 0.6 Zi [try] Add, only if velocity folding is a problem: X-hi-PP6 PPmag6 VPDD 15 & 20 staggered 225 150 20 3000 CI – across and box @ 1.5 Zi [try] CI – across @ 0.6 Zi [try] bore @ 0.8, 1.6, 2.4 km [default]

  7. WCR/UWKA data • Most WCR data processed at this time • netcdf • time-corrected • corrected for aircraft motion • bad data due to radio-interference corrected or omitted • UWKA probe data at 1 Hz and 25 Hz • Plans for higher level WCR reflectivity and velocities • focus on a few key CI days • probably structured 1 file = 1 flight leg • probably downgraded (eg 30 Hz to 2 Hz) • possibly merged dataset (WCR + UWKA, same time stamp) • probably not: • 2D gridded • Dual-Doppler synthesized

  8. Examples:May 24June 19

  9. 19:42 UTC 24 May AMA 19:52 UWKA N 19:43 cold front dryline WCR up-looking, flight level 165 m

  10. 5/24, 21:07 UTC

  11. frontal motion Total leg length: 12 km

  12. 20:10 Z VPDD cold front and dryline have collapsed Flight level: ~2300 m AGL cold front below @ 20:09 Z frontal motion SSE 164 NNW 344 front & dryline moist air cold air

  13. Height below flight level (m) Time (UTC) WCR nadir antenna reflectivity Flight level: 2300 m AGL dBZ Aspect ratio : 2:1

  14. Height above flight level (m) total length: 11.2 km aspect ratio: 1:1 NW 315 flight level: 360 m AGL frontal motion SE 135 19:33 - 19:35:33 possibly stratus clouds frontal motion WNW 344 ESE 164 20:21:50 - 20:25:40 front km -5 frontal motion SSE 164 NNW 344 km dBZ 6 8 -45 20:27:00 - 20:30:48 km NW 300 frontal motion SE 120 20:42:43 - 20:46:18

  15. 21:06:36-21:13:20 Gravity waves in the cold-frontal stratus frontal motion This is a cloud whose towering tops had grown well above 4 km AGL, part of a line of storm cells aligned with the cold front mixing ratio 9 km Deep convection develops 9 km ahead of sfc cold front w 21:05 21:15 wind direction 21:32 q qe WNW 290 ESE 110

  16. 19 June 20:06 UWKA 20:03 ‘dryline’ wind shift

  17. height AGL (m) 19 June 2000 1500 1 m/s 4 m/s 1 m/s 1000 UWKA flight level (~880 m) 500 0 SE NW wind direction mixing ratio 11 km q qe mixing ratio vertical velocity

  18. June 19 21:22 - 21:25 UTC N flight level: 1280 m MSL ( 300 m AGL) ‘dryline’ wind shift 21:18 UTC looking SE

  19. ‘dryline’ SE NW 1.5 km displacement plume on the dry side mixing ratio relative humidity buoyant plume! qe q

  20. 19 June 21:33 UWKA 21:37 Deep convection pops up on the moist side, some 10 km east of the fine line ‘dryline’ wind shift

  21. height AGL (m) 2000 1000 UWKA flight level (~745 m) 0 Signal overwhelmed by rain drops wind direction mixing ratio NW SE 13.6 km qe q RH w 19 June

  22. Research objectives • Understand WCR echo plumes (mainly BLH) • vertical structure (echo and velocity) • compare vertical velocities (UWKA vs WCR) • document buoyancy and moisture anomalies • interpret the BL dynamics, possibly in relation to land surface heterogeneity • CI case studies • background info (sondes, satellite, ELDORA, ground radars) • focused on WCR & UWKA data • Structure and evolution • Kinematics (updraft, VPDD) • Dynamical interpretation • priorities: May 24, June 19 (, June 12, …)

  23. May 31 – BLH mission – 38 km total length – 1:1 aspect ratio

  24. Vertical velocity structure & bias

  25. May 19 – vertical velocity field

  26. questions • Quiescent BL (BLH-BLE) • Are bug plumes thermals? • Do bug plumes transfer moisture/heat? • Do bugs oppose the updraft in which they are embedded? • What is the vertical velocity structure within plumes? • How do plumes evolve and/or move? • How do plumes behave spatially (spacing, width, geographic preference …)? • How does plume location relate to BL structure (shear, depth, land surface properties? • CI case studies • WCR and UWKA documented structure and evolution • Kinematics (updraft, VPDD) • Dynamical interpretation: what triggers deep convection? • priorities: May 24, June 19 (, June 12, May 22, June 3…)

More Related