Cabauw Experimental Results from the Project for Intercomparison of Land-Surface
BBC/4DC meeting Leipzig 13.-16.05.02 Structure of microphysical cloud parameters in Cu and StCu...
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Transcript of BBC/4DC meeting Leipzig 13.-16.05.02 Structure of microphysical cloud parameters in Cu and StCu...
BBC/4DC meeting Leipzig 13.-16.05.02
Dr. Dagmar Nagel
GKSS Research Center GeesthachtInstitute for Coastal Research
Max-Planck-Strasse 1D 21502 Geesthacht
GermanyEmail: [email protected]
BBC/4DC meeting Leipzig 13.-16.05.02
BBC/4DC meeting Leipzig 13.-16.05.02
1. Instrumentation1.1 Aircraft1.2 Probes
2. Calibration
4. Results
5. Outlook
2.1 Absolute sizing2.2 Highspeed calibration
4.1 Products4.2 Examples from the field campaign
BBC/4DC meeting Leipzig 13.-16.05.02BBC/4DC meeting Leipzig 13.-16.05.02
Merlin IV of Meteo France with PMS probes
1. Instrumentation
BBC/4DC meeting Leipzig 13.-16.05.02
1. Instrumentation
PMS FSSP-ER /PMS FSSP-100
PMS OAP 2D2-C PMS OAP 2D2-P
Nevzorov probe
Size range between 2 µm to 6.4 mm
BBC/4DC meeting Leipzig 13.-16.05.02
2. CalibrationAbsolute calibration with monodisperse droplet generator
0 5 10 15 20 25 30 35 40 45 500
5
10
15
20
25
30
35
40
45
50
Range 1 08/2001 water droplets 08/2001 glass beads
drop
let d
iam
eter
[ µm
]
FSSP-ER droplet diameter [ µm ]
BBC/4DC meeting Leipzig 13.-16.05.02
2. CalibrationHighspeed calibration at 100 m/s – determination of the sample volume
Measurement
X
Z
Y
filter
DOF
Definitionparticle flow
vARdDOFtV
sample volume :
concentration :
)()(),(tVdNdtC
d
Signal (red) and annulus (blue) produced by a glass fiber
BBC/4DC meeting Leipzig 13.-16.05.02
2. CalibrationHighspeed calibration at 100 m/s – determination of the sample volumn
10 20 30 40 50 60 70 80 90 100 1102.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
quarz 1 quarz 1b - 6b quarz 6a quarz 10b, 11b glass 2 glass 1a - 8a water droplets
at 1 to 3 m/s static value
DO
F [ m
m ]
FSSP - Dm [ µm ]
DOF as function of different materials at low speeds (2 m/s) for FSSP-ER, range 0
BBC/4DC meeting Leipzig 13.-16.05.02
2. CalibrationHighspeed calibration at 100 m/s – determination of the sample volume
DOF als Funktion der Geschwindigkeit
BBC/4DC meeting Leipzig 13.-16.05.02
2. CalibrationHighspeed calibration at 100 m/s – channel shift
0 20 40 60 80 100 120 140 1600
2
4
6
8
10
12
14
16
Ch01 Ch02 Ch03 Ch04 Ch05 Ch06 Ch07 Ch08 Ch10 / Ch11 Ch11 / Ch12 Ch13 / Ch 14 Ch15
chan
nel
speed [ m/s ]Channel shift measured with FSSP-100 at speeds between 15 m/s and 100 m/s
BBC/4DC meeting Leipzig 13.-16.05.02
3. Calculation procedure
Combination of single spectra from all three probes for 10s periods
Products:number concentration
effective radius
water content
effective radius
number concentration
liquid and ice water content
Time series of every flight section for every probe for
Spectra of every probe for every flight section
10s time series of bulk data like
10s merged spectra of all three probes
BBC/4DC meeting Leipzig 13.-16.05.02
3. Calculation procedure
Combination of single spectra from all three probes for 10s periods
1 10 100 100010-6
10-5
10-4
10-3
10-2
10-1
100
101
102
103
104
105
106
FSSP-ER 2D2-C 2D2-P
dN/d
D [
l-1µm
-1 ]
equivalent diameter [ µm ]
23.09.01 Merlin flight 45, leg 3
1 10 100 100010-6
10-5
10-4
10-3
10-2
10-1
100
101
102
103
104
105
106
FSSP-ER 2D2-C 2D2-P merged spectra
dN/d
D [
l-1µm
-1 ]
equivalent diameter [ µm ]
13.09.01 Merlin flight 41, leg 8
25 % limit
50 % limit
50 % limit
BBC/4DC meeting Leipzig 13.-16.05.02
1 11.09.01 40 S1 – S2 – S44
+2 partly880 -1200 m 6 590 – 2400 m
2 13.09.01 41 S1 – B5 8 900 – 2400 m -
3 20.09.01 42 S1 – S354
1840 – 2050 m1820 – 2340 m
3 1230 – 2670 m
4 22.09.01 44 S1 – S3
5 23.09.01 45 S1 – S3 7 570 – 1210 m 9 580 – 1200 m
6 23.09.01 46 S1 – S3 6 740 – 1360 m -
7 25.09.01 47 S1 – S2 4 590 – 920 m 1 600 – 3160 m
8 26.09.01 48 S1 – S23
+ 5 partly590 – 1840 m 6 580 – 2720 m
9 27.09.01 49 S1 – S51
+ 3 partly 610 – 1550 m 12 620 – 1540 m
4. Results
Data overview
DateNo. Merlin flight between hor. legs soundingsbetween between
Not useable due to missing data!
4
5
6
7
8
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 13.09.01
13.09.01 09:32:00 leg 1, 907 m
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 13.09.01
1 10 100 1000 1000010-6
10-5
10-4
10-3
10-2
10-1
100
101
102
103
104
105
106
1 10 100 1000 10000100
101
102
103
104
105
106
107
next to Cabauw with precipitation
in cloud next to B5 below cloud base
dN/d
D [
l-1µm
-1 ]
equivalent diameter [ µm ]
dV
/dD
[ µm
3 l-1µm
-1 ]
equivalent diameter [ µm ]
Typical size and volume distribution at leg 1, 907 m
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 13.09.01
Effective radius and total water content between S1 and B5
0
500
1000
1500
2000
2500
3 5 10 20 30 40 50 75 100 125 150 200 250
Hei
ght [
m ]
Reff
[ µm ]
0
500
1000
1500
2000
2500
0 5 10 15 20 25 30 35 40 45 50 55
Hei
ght [
m ]
Distance from S1 = Cabauw [ km ]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50Water content [ g/m3 ]
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 13.09.01
0
500
1000
1500
2000
2500
LWC [ g/m3 ]
Hei
ght [
m ]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
0
500
1000
1500
2000
2500
0 5 10 15 20 25 30 35 40 45 50 55 Distance from S1 = Cabauw [ km ]
IWC [ g/m3 ]
Hei
ght [
m ]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
Liquid and ice water content between S1 and B5
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 20.09.01
20.09.01 12:21:06 leg 5, 2036 m
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 20.09.01
1600
1800
2000
2200
2400
3 5 10 20 30 40 50 75 100 125 150 200 250
Hei
ght [
m ]
1600
1800
2000
2200
2400
0 5 10 15 20 25 30 35 40 45 50 55 60 Distance from S1 = Cabauw [ km ]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.50
Hei
ght [
m ]
Reff
[ µm ]
TWC [ g/m3 ]
Effective radius and total water content between S1 and S3, part 2
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 20.09.01
Liquid and ice water content between S1 and S3, part 2
1600
1800
2000
2200
2400
LWC [ g/m3 ]
Hei
ght [
m ]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50
1600
1800
2000
2200
2400
0 5 10 15 20 25 30 35 40 45 50 55 60 Distance from S1 = Cabauw [ km ]
Hei
ght [
m ]
1E-4 1E-3 0.01 0.01 0.01 0.02 0.03 0.03 0.04 0.04 0.04 0.05IWC [ g/m3 ]
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 20.09.01
1600
1800
2000
2200
2400
0 2 4 6 8 10 12 14 16 18 20
1600
1800
2000
2200
2400
0.0 0.1 0.2 0.3 0.4 0.5
11:24:17 - 11:27:16 13:14:32 - 13:15:41 13:16:33 - 13:18:18
Reff [ µm ]
Hei
ght [
m ]
Water content [ g/m3 ]
Decent (black) at the beginning and decent (red) and ascent (green) at the end of the flightbetween S1 and S3
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 23.09.01
23.09.01 13:28:40 leg 3, 892 m
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 23.09.01
Liquid water content and number concentration between S1 and S3
600
800
1000
1200
1400H
eigh
t [ m
]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50LWC [ g/m3 ]
600
800
1000
1200
1400
0 5 10 15 20 25 30 35 40 45 50 55 60 65 Distance from S1 = Cabauw [ km ]
Hei
ght [
m ]
1E-1 5E-1 1E0 5E0 1E1 5E1 1E2 5E2 1E3 5E3 1E4 5E4 1E5 5E5 1E6Concentration [ l-1 ]
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 23.09.01
600
800
1000
1200
1400
3 5 10 20 30 40 50 75 100 125 150 200 250
Hei
ght [
m ]
600
800
1000
1200
1400
0 5 10 15 20 25 30 35 40 45 50 55 60 65 Distance from S1 = Cabauw [ km ]
1E-3 0.01 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.50 0.60 0.70
Hei
ght [
m ]
Reff
[ µm ]
LWC [ g/m3 ]
Effective radius and liquid water content between S1 and S3
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 25.09.01
25.09.01 14:21:10 leg 1, 644 m
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 25.09.01
Effective radius and liquid water content between S1 and S2
0
200
400
600
800
1000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Hei
ght [
m ]
0
200
400
600
800
1000
0 5 10 15 20 25 30 35 40 45 Distance from S1 = Cabauw [ km ]
1E-6 1E-5 1E-4 1E-3 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10
Hei
ght [
m ]
Reff
[ µm ]
LWC [ g/m3 ]
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 25.09.01
25.09.01 15:10:50 ascent next to Cabauw
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 25.09.01
0
500
1000
1500
2000
2500
3000
3500
0 1 2 3 4 5 6 7 8 9 100
500
1000
1500
2000
2500
3000
3500
1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1
0 10 20 30 40 50 60 70 80 90 100110
Reff [ µm ]
Hei
ght [
m ]
Water content [ g/m3 ]
rel. Hum. [ % ]
Ascent at Cabauw (black) and horizontal legs (colored) between S1 and S2
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 27.09.01
27.09.01 10:44:32 leg 4, 915 m
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 27.09.01
0 2 4 6 8 10
1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1
0 2 4 6 8 10 0 2 4 6 8 10 0 2 4 6 8 10 0 2 4 6 8 10 0 2 4 6 8 10
1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1 1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1 1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1 1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1 1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1
600
800
1000
1200
1400
1600
1800
2000
0 2 4 6 8 10
600
800
1000
1200
1400
1600
1800
2000
1E-7 1E-6 1E-5 1E-4 1E-3 0.01 0.1 1
Reff [ µm ]
Water content [ g/m3 ]
Reff [ µm ]
Reff [ µm ]
Reff [ µm ]
Reff [ µm ]
next to S5
Reff [ µm ]
Water content [ g/m3 ]
Water content [ g/m3 ]
Water content [ g/m 3 ]
Water content [ g/m3 ]
next to S5
Water content [ g/m 3 ]
next to S1
Reff [ µm ]
Hei
ght [
m ]
next to S1
Hei
ght [
m ]
Water content [ g/m 3 ]
Effective radius and water content at leg 3 (open symbols) and leg 4 (solid symbols) between S1 and S5
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 27.09.01
1 10 10010-1
100
101
102
103
104
105
106
1 10 100102
103
104
105
106
107
108
917 m 1056 m 1231 m 1408 m 1522 m
dN/d
D [
l-1µm
-1 ]
equivalent diameter [ µm ]
dV
/dD
[ µm
3 l-1µm
-1 ]
equivalent diameter [ µm ]
Typical size and volumn distribution between 917 m and 1522 m height next to Cabauw
BBC/4DC meeting Leipzig 13.-16.05.02
4. Results 27.09.01
1 10 10010-1
100
101
102
103
104
105
106
1 10 100102
103
104
105
106
107
108
935 m 969 m 1016 m 1077 m 1132 m 1186 m 1243 m 1307 m
dN/d
D [
l-1µm
-1 ]
equivalent diameter [ µm ]
dV
/dD
[ µm
3 l-1µm
-1 ]
equivalent diameter [ µm ]
Typical size and volumn distribution between 935 m and 1307 m height in a Cumulus cloud at leg 4
BBC/4DC meeting Leipzig 13.-16.05.02
5. Outlook
Improvement of the algorithm for the combination of single spectra
Comparison with data from Nevzorov probe and PVM
Detailed comparison to measurements of ground-based radar