wmo cloud modelling workshop, hamburg, 12. juli 2004 the baltex bridge campaign (bbc) cases susanne...
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![Page 1: WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004 The BALTEX BRIDGE Campaign (BBC) cases Susanne Crewell, Nicole van Lipzig, Wenchieh Yen Meteorological](https://reader036.vdocuments.mx/reader036/viewer/2022062423/56649e615503460f94b5d168/html5/thumbnails/1.jpg)
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
The BALTEX BRIDGE Campaign (BBC) cases
Susanne Crewell, Nicole van Lipzig, Wenchieh Yen
Meteorological Institute Munich
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Contributions
Felix Ament, University of BonnLokal-Modell (LM) of DWD, x =1.1 to 7 km
- horizontal resolution, - different cloud schemes
Ulrika Willén, SMHIRCA, x = 18 km
- vertical resolution (24, 40, 60 layers)
Erik van Meijgaard, KNMIRACMO, x = 18 km
- different physic packages
Jean-Pierre Charboreau, Laboratoire Aerologique, Méso-NH, x = 2.5 km
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
BALTEX BRIDGE Campaign (BBC)
Crewell, S., et al, The BALTEX Bridge Campaign: An integrated approach for a better understanding of clouds, Bull. Amer. Meteor. Soc. , in press.
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001
0 UTC, 23 Sep 01 0 UTC, 24 Sep 01
Geopotentialheight [gpm]at 500 hPa
IWV [kg m-2]
sea levelpressure
wind at850 hPa
Cabauw
.
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001
Cabauw
Radiosoundings, μ- & IR radiometer, lidarsuper site
MODIS 10:40 UTC
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: aircraft
CASI observations by FU Berlin, Radiances at 753 nm
10 km
1.4 km
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: LWC
Satellite retrieval from KNMI
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001
Cloud radar - refectivity- velocity- LDRLWPLidarRadiosonde
20 30 40 50 60 70 80 90 100R elative Hum id ity [% ]
0
500
1000
1500
2000
2500
3000
He
igh
t [m
] 8 :58 U TC10:01 U TC10:59 U TC13:28 U TC14:43 U TC15:37 U TC
284 286 288 290 292 294 296 298Poten tia l tem pera tu re [K ]
0
500
1000
1500
2000
2500
3000
Hei
ght
[m]
8 :58 U TC10:01 U TC10:59 U TC13:28 U TC14:43 U TC15:37 U TC
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: cloud radar
9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9
T im e [U TC ]
0.2
0.4
0.6
0.8
1.0
1.2
He
ight
[km
]
-55
-50
-45
-40
-35
-30
-25
Reflectiv ity [dBZe] 23.09.2001
9 9.1 9.2 9.3 9.4 9.5 9.6 9.7 9.8 9.9
T im e [U TC ]
0.2
0.4
0.6
0.8
1.0
1.2
Hei
ght
[km
]
- 2
- 1 . 5
- 1
- 0 . 5
0
0 . 5
1
1 . 5
2
Velocity [m /s] 23.09.2001
Markus Quante, GKSS
9.46 9.48 9.5 9.52 9.54 9.56 9.58 9.6 9.62T im e [UT C]
0
0.2
0.4
0.6
0.8
1
LW
C [
gm-3
] PVM 100ANevzorov probeFSSP-ER
Leg 5, 23.09.2001, 584 m
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: LWC
Löhnert, U., S. Crewell, C. Simmer, 2004: An integrated approach towards retrieving physically consistent profiles
of temperature, humidity, and cloud liquid water, J. Appl. Met.,
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: LWC
7:58 to 9:57 UTC
mean LWCadiabatic 90 % percentile aircraft meas. in the vicinity of the measurement site (< 5 km)
LWPIPT= 64 g m-2
LWPadiab= 100 g m-2
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: aircraft
Aircraft observations by Merlin, Partenavia, Cessna
1 10 100 1000 10000diam eter [m ]
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
1E+0
1E+1
1E+2
1E+3
1E+4
1E+5
dN/d
D [
l-1
m-1
]
FSSP-ER2D -C2D -P
EC AV, 02.04.03, fligh t section 7, 954 m
GKSS
particle volume monitor
liquid water content (LWC) of drops with diameter<40 μm; PVM-100A3, 14, p, m, b
LWC, effective radius (reff)
Nevzorov Probe5,
liquid and total (liquid plus ice) water content (TWC)
LWC, TWC
FSSP sizing of single droplets with diameter < 40 μm; FSSP-100 5, m FSSP-100-ER 5, m Fast-FSSP 3,
14, p, m
droplet size distribution (DSD)
optical array probes
droplets with diameter between 25 and 800 μm with OAP-2D2-C5, p, m OAP-2D2-P5, m
DSD
aerosol sensors
aerosol concentration for particles > 0.01 µm with CPC-3010 14, p,m ; PCASP-X 14, p
particle concentration and size distribution
albedometer14,p
1024 channels between 290 an 1000 nm; active horizontal stabilization
spectral irradiances ↓↑
imager radiances between 450 and 1000 nm by casi19, c
spectrally resolved images
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
RACMO with 24 layersand ECHAM4 Physics
RACMO with 40 layersand ECMWF physics
Ulrika Willen
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
Ulrika Willen
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparison: Cabauw site
LWC
RACMO (ECHAM4) RACMO (ECMWF) LM
RCA Méso-NH
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
LM and Precipitation
Cabauw
Precipitation [mm/h]
Fre
quen
cy o
f oc
cure
nce
[%]
0 0-0.1 0.1 -1 > 1
LWP, 23 September 12 UTC
Black contours show edgesof precipitation areas
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
0 UTC, 23 Sep 01 0 UTC, 24 Sep 01
Geopotentialheight [gpm]at 500 hPa
IWV [kg m-2]
sea levelpressure
wind at850 hPa
Cabauw
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
Cabauw
Marc Schröder
LM, LWP 11 UTC0.3, 0.6, 0.9 kg m-2
over land
MODIS, 10:01 UTC
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
LM LWC domain average11 UTC, Top 2700 m
5:15 8:30 11:20 14:17
wind speed wind direction temperature
virt. pot. temp. spec. humidity rel. humidity (+ice sat)
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
ACTOS systemHolger Siebert IfT Leipzig
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
different vertical resolutionsfor RCA model
Ulrika Willen
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Conclusions
two well documented cases (stratiform – convective) from BALTEXBRIDGE Campaigns
all observations (also for all other CLIWA-NET days) are available on request and soon using anonymous ftp at bbc.knmi.nlcliwa_dvd
all models seem to represent synoptic situation well
for stratiform case Meso-NH reproduces low level stratus cloud best
for convective case statistical analysis has to be made
Lokal-Modell has problems with contiguous clouds and the production ofslight precipitation
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: Wind400
200
0
10
5
0
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WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001
low-pressure system, still pronouncedly present in the upper air, moved to Denmark on the 21st, but it crossed the Netherlands again on the 23rd. 21-22 Sep: cloudy with (from time to time heavy) showers. 23 Sep: low-level clouds in the morning transferring into shallow cumulus in the early afternoon.
MODIS 10:40