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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.

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UWKA and WCR

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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/


Uwka and wcr

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

+

-

-

+


Uwka and wcr

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


Wyoming cloud radar

Wyoming Cloud Radar

95 GHz (3 mm) - Doppler


Uwka and wcr

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


Uwka and wcr

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]


Wcr uwka data

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


Examples may 24 june 19

Examples:May 24June 19


Uwka and wcr

19:42 UTC

24 May

AMA

19:52

UWKA

N

19:43

cold front

dryline

WCR up-looking, flight level 165 m


Uwka and wcr

5/24, 21:07 UTC


Uwka and wcr

frontal motion

Total leg length: 12 km


Uwka and wcr

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


Uwka and wcr

Height below flight level

(m)

Time (UTC)

WCR nadir

antenna

reflectivity

Flight level: 2300 m AGL

dBZ

Aspect ratio : 2:1


Uwka and wcr

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


Uwka and wcr

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


Uwka and wcr

19 June

20:06

UWKA

20:03

‘dryline’

wind shift


Uwka and wcr

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


Uwka and wcr

June 19

21:22 - 21:25 UTC

N

flight level: 1280 m MSL

( 300 m AGL)

‘dryline’

wind shift

21:18 UTC

looking SE


Uwka and wcr

‘dryline’

SE

NW

1.5 km displacement

plume on the dry side

mixing ratio

relative humidity

buoyant plume!

qe

q


Uwka and wcr

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


Uwka and wcr

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


Research objectives

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, …)


Uwka and wcr

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


Uwka and wcr

Vertical velocity structure & bias


Uwka and wcr

May 19 – vertical velocity field


Questions

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…)


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