rob roebeling
DESCRIPTION
Rob Roebeling. CloudNET meeting 18 – 19 October 2004, Delft METEOSAT-8 OBSERVATIONS AND DERIVED CLOUD MICROPHYSICAL PROPERTIES. Climate Monitoring Satellite Application Facility (CMSAF) Funding: European Meteorological Satellite Organization (EUMETSAT) - PowerPoint PPT PresentationTRANSCRIPT
Rob Roebeling
CloudNET meeting18 – 19 October 2004, Delft
METEOSAT-8 OBSERVATIONS AND DERIVED CLOUD MICROPHYSICAL PROPERTIES
Climate Monitoring Satellite Application Facility (CMSAF)
Funding: European Meteorological Satellite Organization (EUMETSAT)
Objective: To generate and archive high quality data products frommeteorological satellites (MSG and AVHRR/METOP) on
a continuous basis, which are relevant for climate research.
DWD (coordinator), FMI, KNMI, RMIB, SMHI and Meteo Swiss
KNMI involvement:• To develop method to retrieve Cloud Physical Products from NOAA-
AVHRR (and METOP) and MSG.• To validate the Cloud Physical Products with in-situ data of dedicate
cloud measurement campaigns
MSG channels and Currently Derived Physical Products.
Cloud Thermodynamic PhaseCloud Liquid Water PathCloud Optical Thickness
Effective RadiusOptical depth
Cloud Top TemperatureDroplet density
Channel 1 (VIS 0.6)
Channel 2 (VIS 0.8)
Channel 3 (NIR 1.6)
Channel 4 (IR 3.9)
Channel 5 (WV 6.2)
Channel 6 (WV 7.3)
Channel 7 (IR 8.7)
Channel 8 (IR 9.7)
Channel 9 (IR 10.8) (Tb)
Channel 10 (IR 12)
Channel 11 (IR 13.4)
Channel 12 (HRV)
Radiative Transfer Modelling
R(sur)
Above the cloud
Below the cloud
ac
bc
Scattering and absorption• Phase• Optical Thickness • Geometric
Thickness• Droplet Density• Effective Radius
Reflectance,
MSG images for Channels 1, 3
Channel 1: 0.6 microns
Channel 3: 1.6 microns
Calibration and Cloud-phase
Water Clouds
Land
Sea
Ice Clouds
Scatterplot 1.6 vs. 0.6 micron channels
Scatterplot 1.6 micron channel, NOAA vs. MSG
Cloud Optical Depth
Meteosat 8, 19 April 2004 Cloud Liquid Water Path
Example for Cabauw (Channel 1 & 3)
NOAA
Example for Cabauw (Channel 9, CTT & Phase)
NOAA
Example for Cabauw (Optical thickness, LWP)
Example for Cabauw: (Reff, Cloud Thickness (H) & n)
Reff (H) + (H)
H + n (cst)
H
Conclusions Meteosat-8 and NOAA reflectance at 0.6 micron are
similar.
Meteosat-8 and NOAA reflectance at 1.6 micron have a ratio of 1.3
All 12 channels will be included in the CloudNet data-base for the three sites.
Products to be include in the CloudNet data-base Cloud Thermodynamic Phase, Cloud Liquid Water Path, Cloud Optical Thickness, Effective Radius,
Cloud Top Temperature, Droplet density