09-Nov-2004Brussels, 09-Nov-20041 CM-SAF Surface Radiation Budget: First Results and Plans R....
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Transcript of 09-Nov-2004Brussels, 09-Nov-20041 CM-SAF Surface Radiation Budget: First Results and Plans R....
09-Nov-2004 Brussels, 09-Nov-2004 1
CM-SAF Surface Radiation Budget: First Results and Plans
R. Hollmann, A. Gratzki, R. MuellerO. Sievers
Deutscher Wetterdienst (DWD)Kaiserleistr. 35
63067 [email protected]
09-Nov-2004 Brussels, 09-Nov-2004 2
CM-SAF Surface Radiation Budget: First Results and Plans
• First Results of Initial operational processing• Validation of SRB products
• Atmospheric Divergence Profile from SEVIRI/GERB• Method• A case study
Overview
09-Nov-2004 Brussels, 09-Nov-2004 3
Sub-tiles for PPS-processing
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09-Nov-2004 Brussels, 09-Nov-2004 4
Surface incoming shortwave flux Surface downwelling longwave flux
Fractional cloud cover Land surface albedo
Pre-operational results from July 2004
09-Nov-2004 Brussels, 09-Nov-2004 5
Carpentras, 100 m aslPayerne, 491 m asl
Validation of Shortwave RadiationJune 2003
All-sky
Clear-sky
Sat-Meas:17.3 W/m²r = 0.93
Sat-Meas:5.8 W/m²r = 0.97
Sat-Meas:2.1 W/m²
Sat-Meas:-2.5 W/m²
09-Nov-2004 Brussels, 09-Nov-2004 6
AVERAGE SIS all Stations (W/m²) June 2003: 12.2March 2004: 8.6April 2004: -14.1
Validation for October 2002, June 2003, March – April 2004
LINDENBERG 10.8 -6.6 -11.0
PAYERNE 17.3 21.9 -8.8
CARPENTRAS 5.8 0.3 -22.4
Sat-Meas
Surface Incoming Solar Radiation
June2003
Mar2004
Apr2004
Instantaneous comparisonat time of overpass vs. hourly surface obs.
Mean differences in W/m²
CABAUW 14.8 18.8 -
09-Nov-2004 Brussels, 09-Nov-2004 7
AVERAGE SDLall Stations (W/m²)
October 2002: -11.9 June 2003: -5.5March 2004: -14.3April 2004: -13.4
Validation for October 2002, June 2003, March – April 2004
LINDENBERG -3.7 8.2 -2.8 10.6
PAYERNE -15.4 -14.1 -27.5 -26.9
CARPENTRAS -14.2 -8.1 -17.2 -24.0
CABAUW -14.1 -11.3 -9.5 -
Sat.-Meas Oct2002
June2003
Mar2004
Apr2004
Surface Downwelling Longwave Radiation
Instantaneous comparisonat time of overpass
09-Nov-2004 Brussels, 09-Nov-2004 8
AVERAGE SOLall Stations (W/m²)
October 2002: 0.8 June 2003: 4.3March 2004: -11.1April 2004: -11.6
Validation for October 2002, June 2003, March – April 2004
LINDENBERG -3.0 2.1 1.0 1.2
PAYERNE 13.8 10.0 -27.8 -24.4
CABAUW -2.2 0.7 -6.5 -
Sat.-Meas Oct2002
June2003
Mar2004
Apr2004
Surface Outgoing Longwave Radiation
Instantaneous comparisonat time of overpass
09-Nov-2004 Brussels, 09-Nov-2004 9
Summary / Outlook:
• Satellite Application Facility on Climate Monitoring has started the pre-operational processing of NOAA-AVHRR overpasses in February 2004
• Operational production ~ Jan 2005
• Surface Radiation Processing, first validation;• mean differences for SIS ~ 15 W/m² • mean differences for SDL ~ 10 W/m²• mean differences for SOL ~ 5 W/m²
• 2nd User Workshop Autumn 2005 in Nuremberg (Germany).• 29.08.-31.08.2005 invitation follows
CM-SAF Surface Radiation Budget: Overview, first Results and Plans
09-Nov-2004 Brussels, 09-Nov-2004 11
Atmospheric Divergence Profile from SEVIRI/GERB
Results:neuronale net´s - for sza-bins of 10° - 3 atm. Layers - SW, LW sep.
RTM calculation
by O. Sievers
Method
09-Nov-2004 Brussels, 09-Nov-2004 12
Atmospheric Divergence Profile from SEVIRI/GERB
image from SEVIRI
@ 23.09.2003, 12:00 UTC
NET-Heating rate in K/daylower troposphere
by O. Sievers
2.0
1.0
0.0
-1.0
-2.0
Application to METEOSAT-8
09-Nov-2004 Brussels, 09-Nov-2004 13
Atmospheric Divergence Profile from SEVIRI/GERB
Examples of vertical profiles of net heating ratefor 23.09.2003, 12:00 UTC
AB
DEC
IH
F G
location of profiles
Heating rate in K/day
He
igh
t in
km
by O. Sievers
09-Nov-2004 Brussels, 09-Nov-2004 14
Atmospheric Divergence Profile from SEVIRI/GERB
by O. Sievers
Summary / Outlook:
• A neuronale net approach has been built up to calculate atmospheric divergence profiles from SEVIRI/GERB radiances
• The accuracy of the method is 0.08 K/d (stratosphere), 0.24 K/d (upper troposphere), 0.14 (lower troposphere) (5 %, 12 %, 19 %)
• Application to METEOSAT-8 (SEVIRI), 23.09.2003 demonstrates its capability
• validation?
09-Nov-2004 Brussels, 09-Nov-2004 15
www.cmsaf.dwd.de
09-Nov-2004 Brussels, 09-Nov-2004 16
Spare slides
09-Nov-2004 Brussels, 09-Nov-2004 17
CM-SAF Surface Radiation Budget: Radiation Divergence Profiles
09-Nov-2004 Brussels, 09-Nov-2004 18
CM-SAF Surface Radiation Budget: Radiation Divergence Profiles
09-Nov-2004 Brussels, 09-Nov-2004 19
CM-SAF Surface Radiation Budget: Radiation Divergence Profiles
09-Nov-2004 Brussels, 09-Nov-2004 20
CM-SAF Surface Radiation Budget: Radiation Divergence Profiles
09-Nov-2004 Brussels, 09-Nov-2004 21
Product Groups
• Water vapour in the atmosphere
• Radiation budget parameters: surface and TOA
• Cloud parameters
Climate Monitoring SAF
09-Nov-2004 Brussels, 09-Nov-2004 22
I2004
I2007
I2008
I2005
I2006
I2009
Initial Operations Phase
Full Operations Phase
V2
V3
Area Extension
EPS
Merging
MSG
(rad & clouds)
HCP
(ATOVS & MSG)
V1NOAA(rad & clouds)
CM-SAF: Schedule & Versioning
CM-SAF Surface Radiation Budget: Overview, first Results and Plans
09-Nov-2004 Brussels, 09-Nov-2004 23
SIS Surface Incoming Short Wave RadiationSNS Surface Net Short Wave Radiation
SDL Surface Downward Long Wave RadiationSOL Surface Out going Long Wave RadiationSNL Surface Net Long Wave Radiation
SRB Surface Radiation BudgetSAL Surface Albedo
Time resolutiondaily mean, monthly mean, monthly mean diurnal cycleSAL (weekly, monthly)Spatial resolution(Pixel), 15 km x 15 km
Surface radiation parameters
Climate Monitoring SAF