CASES-99 MINI sodar at LEON

 

Date

Time
(GMT)

Event

Parameter change

10/04/99

22:35

end of convection

 

10/05

00:10

weak ground layer (50 m), becomes stronger at 00:55; slow oscillation of upper boundary (50 - 75 m); becomes weak and shallow at 04:00 (25 - 50 m)

 
 

04:20

possible wave in sfc layer (duration ~ 6 min.)

 
 

08:30

sfc layer starts to grow slowly from >25 m to 75 m at 11:00

 
 

10:40

six short (5 min.) "wave packets" or "burst of turbulence", the last one at 11:50

 
 

11:00

sfc layer weakens and dissipates

 
 

13:00

sfc layer starts to grow again, possible precursor of convection

 
 

13:25

inversion break-up, sfc layer lifts off; w<0 within raising layer

 
 

15:00

capping inversion raises beyond sodar range (200 m)

 
 

22:20

end of convection

 

10/06

00:55

sfc layer appeared (15 m)

 
 

01:13

possible wave packet;

 
 

01:20

sharp growth of sfc layer thickness (up to 50 m); remains till morning

 
 

04:35

weak layer appears at ~70 m, descends and merges with sfc layer (04:50)

 
 

12:00

possible waves in sfc layer (short period) till inversion break up

 
 

13:20

inversion break-up, sfc layer lifts off; w<0 within raising layer

 
 

14:50

capping inversion raises beyond sodar range (200 m)

 
 

22:00

end of convection; no signal till 23:35

 

10/07

00:10

sfc layer ("spiky pattern") without distinct upper boundary (150-175 m); exists till 13:30

 
 

15:00

very weak signs of convection (?)

 
 

21:40

end of convection

 
 

23:00

first signs of sfc layer, weak approx. 75 m

 

10/08

00:00

sfc layer forms (110 m); some oscillations of upper boundary till 02:00

 
 

02:00

increase of "darkness" of sfc layer

 
 

04:15

possible waves in sfc layer (short period)till 04:30 (end of chart)

 
 

04:30

no charts till 16:45 10/09/1999

 

10/09

21:55

end of convection

 
 

22:10

noise measurement till 23:05

 

10/10

00:10

sfc layer forms (50 m), remains till 02:15 when it weakens and dissipates

 
 

03:10

sfc layer arises again (20 m =>50 m)

 
 

04:40

growth of sfc layer thickness up to 75 m;

 
 

06:20

sfc layer becomes "lighter"

 
 

06:40

more dark layer (quasi-elevated h=30-75 m) forms within ground layer; it merges with clutter layer at 06:55

 
 

07:03

the same as above, merges with clutter layer at 07:25

 
 

08:03

possible wave packet (short period), duration 5 min.

 
 

10:10

inner layer (of greater darkness) starts to grow up; at 10:45 fills whole sfc layer; then darkness diminishes with slowly growing thickness up to 150 m at 14:00

 
 

12:45

various wave-like or descending layer structures within ground layer till 14:00

 
 

14:10

sfc layer dissipates, lefts on its place very weak elevated layer H=125, h=10

 
 

14:15

break up of noct. inversion; thin (~20 m) sfc layer ascends from the ground

 
 

15:25

capping inversion raises beyond sodar range (200 m)

 
 

22:30

end of convection; noise & no signal till 01:27 next day

 

10/11

01:28

solitary wave like event; it is recorded at all sites

 
 

01:55

second burst of turbulence

 
 

02:15

sfc layer forms; upper boundary of a "weak but thick" (>200 m) layer descends with increasing darkens

 
 

04:25

burst of turbulence within sfc layer; possible waves after

 
 

05:45

sfc layer gradually transforms into a layer with inner spiky structure and without clear defined upper boundary; remains till morning

 
 

09:30

 

only vert. ?

 

09:40

possible waves in sfc layer (became visible because of greater time resolution?) till morning

 
 

13:10

inversion break up; sfc layer starts to ascend

 
 

13:25

low boundary of inversion layer lifts off the ground

 
 

13:35

 

three comp. mode?

 

15:15

capping inversion (lower boundary) raises beyond sodar range (200 m)

 
 

22:30

end of convection

 
 

23:45

sfc layer forms (50 m)

 

10/12

01:30

 

vert. only

 

01:40

shadow of elevated layer; remains till 01:52

 
 

02:10

inner layer (25 m) with greater darkness till 02:30

 
 

04:30

 

three comp. mode?

 

05:25

spiky top sfc layer with possible waves or fine structure remains till 08:30

 
 

08:30

"two upper boundary" sfc layer: inner layer (100=>50=>150 m) with greater darkness, outer boundary 100=>150 m; remains till 10:00

 
 

10:30

possible waves in sfc layer till 13:00

 
 

13:30

inversion break up; low boundary of inversion layer lifts off the ground

 
 

14:30

capping inversion raises beyond sodar range (200 m)

 
 

21:25

end of convection

 
 

23:30

sfc layer ("spiky pattern") without distinct upper boundary grows from ground to 100 at 00:00

 

10/13

00:00

"two upper boundary" sfc layer till 07:45

 
 

04:00

possible waves in sfc layer till 07:20

 
 

08:00

waves or "falling layer structures" within sfc layer till 10:00

 
 

09:05

upper boundary of the sfc layer goes beyond the sodar range (200 m); intensity of the layer diminishes, various structures till 11:45

 
 

11:45

abrupt increase in signal level at all heights; vertical wind becomes negative at all heights; wave on elevated layer (75-150 m) for approx. 5 min.

 
 

11:55

another elev. layer lifts off the ground; wave; exists till 12:15

 
 

12:00

sfc layer ("spiky pattern") without distinct upper boundary (approx. 50 m); gradually disappears (13:30); possibly upper boundary of ground layer is higher then 200 m

 
 

14:25

gradual development of convection like structures; no raising layer

 
 

22:20

end of convection

 
 

23:30

weak sfc layer without distinct boundary

 

10/14

02:45

sfc layer (40 m) forms

 
 

04:20

"two upper boundary" sfc layer till 07:15

 
 

07:30

weak sfc layer (175 - 150 m) with "spiky" structures near ground (75 m) till 11:35

 
 

12:50

"darker" sublayers form within the sfc layer at the upper boundary and near ground; merge together at 13:20

 
 

13:35

sfc layer transforms into elev. one (detaches from the ground); remains till 14:40; possible beginning of convection

 
 

14:40

elev. layer dissipates and ascends; convection structures develop beneath

 
 

15:10

capping inversion raises beyond sodar range (200 m)

 
 

22:15

end of convection

 
 

23:25

sfc layer forms (100 m); thickness grows up to >200 m at 02:50 next day

 

10/15

03:00

possible waves within sfc layer

 
 

04:30

upper boundary of sfc layer descends lower 200 m; again goes up 05:40; remains higher 200 m all night

 
 

11:00

possible waves in sfc layer till 14:10

 
 

15:00

gradual development of convection like structures; no raising layer; very feeble convection (?) all day

 

10/16

00:00

no charts till 16:55

 
 

17:00

no charts till 22:00 10/17/1999

 

10/17

22:50

end of convection

 
 

23:00

weak non-layer sporadic structures near ground till 02:00 next day

 

10/18

01:40

burst of turbulence 15 min.; abrupt change of vertical wind from downward to upward

 
 

01:55

very thin sfc layer (~20 m) is possible

 
 

06:25

burst of turbulence 5 min.

 
 

06:30

sfc layer (25 to 50 m) till 10:35

 
 

11:00

sfc layer (25 to 50 m) till 12:30

 
 

12:30

sfc layer: thickness grows, intensity diminishes

 
 

13:35

shadow of elev. layer at 25 to 75 m for 10 min.

 
 

13:55

break up of inversion, sfc layer starts to ascend

 
 

14:45

elev. layer dissipates at approx. 125 m; convection develops

 
 

22:25

end of convection

 

10/19

01:15

sfc layer (30 m) forms

 
 

04:10

growth of sfc layer up to 150 m at 05:50 with simultaneous diminishing of its intensity;

 
 

04:15

shadow of elev. layer (75 to 150 m) for 15 min.

 
 

06:00

sfc layer breaks up into sporadic structures (waves? falling layers?); continue till 09:00

 
 

08:20

weak elev. layer at approx. 150 m for 20 min.

 
 

09:35

weak, intermittent elev. layer at 75 - 40 m for 50 min.

 
 

13:50

break up of inversion, sfc layer starts to ascend

 
 

15:00

elev. layer dissipates at approx. 175 m; developed convection

 
 

22:15

end of developed convection; some weak plum like structures for 70 min.

parameter change?

 

23:40

weak various structures below 75 m till 06:00 next day

 

10/20

06:05

thin sfc layer forms (20 m) then gradually grows to 75 m at 13:00

 
 

07:20

shadow of elev. layer at 75 m for 10 min.

 
 

08:10

weak elev. layer at 100 - 75 m; could be traced till 09:10

 
 

13:30

inversion break up; sfc layer lifts off; no distinct lower boundary of elev. layer

 
 

14:25

upper boundary of elev. layer raises beyond sodar range (200 m)

 
 

22:15

end of convection

 
 

23:50

sfc layer forms (50 m)

 

10/21

00:25

wave; break up of sfc layer

 
 

00:40

wave motions on thin elev. layer; short period/small amplitude modulated by long period/high amplitude; possible wave/falling layer structures till 02:30

 
 

02:00

sfc layer forms (25 m), gradually grows up to 150 m by 07:00

 
 

02:55

first signs of elev. layer at 175 m; could be traced till 14:30

 
 

04:10

noise measurement for 10 min.

 
 

05:00

possible waves within sfc layer for 60 min.

 
 

06:55

elev. layer merges with sfc layer; remain together for approx. 70 min.;

possible waves within sfc layer for 55 min.

 
 

08:50

possible short period waves (packets?) on elev. layer for 75 min.

 
 

10:10

one more elev. layer descends from above and in 20 min. merges with existing one

 
 

10:40

layered structure transforms into "two upper boundary" sfc layer; remains till 13:00

 
 

13:00

sfc layer divides into sfc (50 m) and elev. parts

 
 

13:40

break up of inversion, sfc layer raises

 
 

13:50

second elev. layer; remains for 10 min.

 
 

14:15

second elev. layer with waves, merges with raising capping inv. by 14:30 or 15:00

 
 

15:50

capping inversion raises beyond sodar range (200 m)

 
 

22: 00

end of convection

 
 

23:00

weak structures near ground (falling layers?) for 60 min.

 
 

23:55

weak sfc layer forms (40 m); remains weak till 01:10

 

10/22

00:15

shadow of elev. layer for 30 min.

 
 

00:50

layer separates from the ground, raises up to 100 m by 01:00, descends down and merges with sfc layer 5 min. later

 
 

01:20

shadow of elev. layer (75 m) for 15 min.

 
 

04:20

several "falling layer" structures within sfc layer

 
 

05:15

sfc layer height diminishes from 125 m to >10 m by 05:55

 
 

05:35

elev. layer appears at 100 m, grow thicker (downward) and merges with sfc layer by 06:00; possible waves

 
 

06:00

intensive sfc layer (75 m) forms after above mentioned merge; remains till 08:50

 
 

08:50

sfc layer disappears; various structures near ground for 70 min.

 
 

10:00

sfc layer forms again (30 m); unevenly grows up to 125 m by 13:30; possible short period waves

 
 

13:40

break up of inversion, sfc layer raises

 
 

14:30

elev. layer dissipates at approx. 150 m; convection develops

 
 

22:10

end of convection

 
 

23:00

sfc layer ("spiky pattern") without distinct upper boundary (75-100 m)

 

10/23

01:10

weak elev. layer merges with sfc layer

 
 

02:10

(?) the same as above

 
 

02:40

(?) the same as above

 
 

02:45

sfc layer forms (75 m); upper boundary is not very distinctive

 
 

07:00

sfc layer ("spiky pattern", 75 m) without distinct upper boundary (150 m); remains till 10:00

 
 

10:35

weak structures in lower 100 m (elev. and falling layers?) till 12:00

 
 

11:40

elev. layer (100 m) with wave packet; 20 min.

 
 

12:10

sfc layer forms, 50 m

 
 

13:30

break up of inversion, sfc layer raises

 
 

14:15

capping inversion raises beyond sodar range (200 m)

 
 

22:35

end of convection

 
 

23:00

weak structures near ground till 03:35 next day

 

10/24

03:40

sfc layer forms (25 m); remains thin all night

 
 

13:45

second upper boundary of sfc layer appears; moves up like usual morning inv. raise, whereas "major" layer remains constant (<50 m) till 14:10

 
 

14:10

break up of inversion, sfc layer lifts off the ground and dissipates at 50 m (100 m ?)

 
 

14:30

developed convection

 
 

22:40

end of convection

 
 

23:35

sfc layer forms, 50 m; gradually grows up to 150 by 09:00; remains all night

 

10/25

01:15

shadow of elev. layer just above sfc one (60 m) for 25 min.

 
 

11:20

"two upper boundary" sfc layer (approx.. 125 and 150 m)

 
 

13:30

beak up of inversion; sfc layer lifts (?) or dissipates (?)

 
 

14:30

developed convection

 
 

22:20

end of convection

 

10/26

00:00

almost no signal till 01:00

 
 

01:00

very shallow sfc layer forms (<20 m); exists all night

 
 

03:35

weak elev. layer (50 m); could be traced till 04:30

 
 

12:00

weak, intermittent elev. layer (50 m); could be traced till 14:10

 
 

14:10

elev. layer merges with sfc one

 
 

14:20

first sigh of inversion break up; sfc layer moves up and lifts off the surface; remains at approx. the same height (HL=20m, HU=75 m) for 40 min.

 
 

15:20

sharp raise of capping layer

 
 

15:40

capping inversion raises beyond sodar range (200 m)

 
 

22:15

end of convection

 
 

23:40

sfc layer forms, 70 m; remains all night, gradually grows up to 150 m by 07:00

 

10/27

09:35

shadow of elev. layer just above sfc one for 30 min.; possible wave on elev. layer

 
 

11:40

possible waves within sfc layer for 45 min.

 
 

13:35

break up of inversion, sfc layer raises

 
 

14:30

capping inversion raises beyond sodar range (200 m)

 
 

21:30

end of convection (?)

 
 

23:00

sfc layer without distinct upper boundary (approx. 100 m); remains all night; gradually grows up to 175 m by 08:00 next day

 

10/28

03:00

"two upper boundary" sfc layer; remains till morning

 
 

10:20

break up of inversion, sfc layer raises