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Chalmers (Sweden), CNRS (France), DWD (Germany),
GKSS (Germany), HUT (Finland), IAP Bern (Switzerland),
Overview of data available from CLIWA-NET measurement campaigns
Ulrich Löhnert:
Production of level2 data
Hannelore Bloemink:
Analysis of supercooled water layers
GKSS:
Investigation of drizzle using radar data
Thomas Rose:
Status of low-cost radiometer design
Overview of Measurements CNN I
Station Microwave IR-Rad. Ceilometer Cloud Radar BALTRAD
Bern xCabauw x xChilbolton x x 94 GHzGeesthacht x 95 GHz xHelsinki x xKiruna xLindenberg x x x xOnsala x xParis x Potsdam x x xSt. Petersburg x 3, 9.6 GHz x
KNMI MIUB Chalmers IFM Vaisala
BBC Workshop Leipzig, May 15-16, 2002
Overview of Measurements CNN II
Station Microwave IR-Rad. Ceilometer Cloud Radar BALTRAD
Bern xCabauw x x x 3 GHzChilbolton x 94 GHzGeesthacht x 95 GHz xGotland xHelsinki x xKiruna xLindenberg x x x xOnsala x xParis x Potsdam x x xSt. Petersburg x 3, 9.6 GHz xKNMI MIUB Chalmers IFM Vaisala CETP
BBC Workshop Leipzig, May 15-16, 2002
Measured and derived quantities
level0:brightness temperatures (MRAD)Infrared temperature (IRAD)
cloud base height (BASE)backscatter profile (BSCT)BALTRAD radar reflectivity at station (DBZC)cloud radar reflectivity/velocity/LDR profile (CPR?)azimuth and elevation scans from MRL-5 radar (AZIM,ELEV)
level1: liquid water path (LWPP)integrated water path ( ‘‘ ‘‘) temperature profiles (TEMP)
humidity profile (HUMI)
level2: LWPS (all data from one station with same timeresolution, crosschecked, rainflags from different sources) LWC, TEMP + HUMI radar/microwave (Cabauw during BBC)
LI (CNN I+II), GE (I), CA (II)
Level1b (CNN I)Level1a (CNN II)
BBC Workshop Leipzig, May 15-16, 2002
Level2 for CNN
BBC Workshop Leipzig, May 15-16, 2002
'Liquid Water Content','[gm^2]',1'Integrated Water Vapor','[kgm^2]',1'Precipitation from ceilometer < 1 = 0','[mm/h]',1'Precipitation flag from IR-shutter','[]',1'Precipitation flag from MICCY-shutter','[]',1'Precipitation flag from rain gauge','[]',1'Radar reflectivity factor from BALTRAD < 0 -> = 0 ','[dBZ]',1'Precipitation flag from Video','[]',1'Number of cloud bases from ceilometer','[]',1'Height of lowest cloud base','[m]',1'Temperature from infrared radiometer','[C]',1'Cloudiness flag from Video','[]',1'Other retrieval results indicate problem 1=true','[]',1%% BEGIN COMMENTSPrecipitation and Cloudiness index from different sources0 - no precipitation (no cloud)1 - precipitaion (cloud) or data value-99. - no data
Level2 for CNN
BBC Workshop Leipzig, May 15-16, 2002
Level2 for CNN
Quicklooks can be found together with data files!
also available as single files over whole campaigne.g. /pub/out/cnn1/level2a/HE_lwp_cnn1_l2a.dat.gztime (days) LWP (gm-2) IWV (kgm-2) zbase (m) Tir(K) 56.514468 250.2 23.1 1310.0 7.156.514479 268.1 23.1 1310.0 7.256.514491 272.4 23.1 1310.0 7.256.514502 274.5 23.1 1310.0 7.1
BBC Workshop Leipzig, May 15-16, 2002
Data Volume CNN I + II
55M cnn1/grab_bag 321M cnn2/grab_bag
611M cnn1/level0a 1.4G cnn2/level0a
439M cnn1/level1a 135M cnn2/level1a
110M cnn1/level1b
197M cnn1/level2a
1.4G cnn1 1.9G cnn2
BBC Workshop Leipzig, May 15-16, 2002
Cloud observations in CNN I
BBC Workshop Leipzig, May 15-16, 2002
Station Rain cloudy clear zB Tir LWP IWV Tir LWP IWV