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]


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


Sub-tiles for PPS-processing

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Surface incoming shortwave flux Surface downwelling longwave flux

Fractional cloud cover Land surface albedo

Pre-operational results from July 2004


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


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 -


AVERAGE SDLall Stations (W/m²)

October 2002: -11.9 June 2003: -5.5March 2004: -14.3April 2004: -13.4


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


AVERAGE SOLall Stations (W/m²)

October 2002: 0.8 June 2003: 4.3March 2004: -11.1April 2004: -11.6


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


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


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


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


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


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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

09-nov-2004brussels, 09-nov-20041 cm-saf surface radiation budget: first results and plans r....

Documents

surface radiation processing

saf surface radiation

mean differences

hourly surface obs

ppsprocessing brussels

operational production

average sis

utcnetheating rate