WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004 The BALTEX BRIDGE Campaign (BBC) cases Susanne...
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Transcript of WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004 The BALTEX BRIDGE Campaign (BBC) cases Susanne...
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
The BALTEX BRIDGE Campaign (BBC) cases
Susanne Crewell, Nicole van Lipzig, Wenchieh Yen
Meteorological Institute Munich
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
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.
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
.
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001
Cabauw
Radiosoundings, μ- & IR radiometer, lidarsuper site
MODIS 10:40 UTC
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
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: LWC
Satellite retrieval from KNMI
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
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
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.,
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
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
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
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
Ulrika Willen
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparison: Cabauw site
LWC
RACMO (ECHAM4) RACMO (ECMWF) LM
RCA Méso-NH
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
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
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
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
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)
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
ACTOS systemHolger Siebert IfT Leipzig
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
21 May 2003
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
Model comparisonCloud cover at Cabauw
different vertical resolutionsfor RCA model
Ulrika Willen
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
WMO Cloud Modelling Workshop, Hamburg, 12. Juli 2004
23 September 2001: Wind400
200
0
10
5
0
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