1. 02.04.2004GIST 21 st, Boulder The Surface Radiation Budget within the Satellite Application Facility on Climate Monitoring (CM-SAF) 02.04.2004 Rainer Hollmann 2 with Annegret Gratzki 2 Richard Müller 2, Carlos Geijo-Guerrero 3, Alex Kryvobok 4 2 Deutscher Wetterdienst, 3 INM, Madrid, Spain 4 UMHI, Kiev

2. 02.04.2004GIST 21 st, Boulder The Surface Radiation Budget within the CM-SAF Satellite Application Facility on Climate Monitoring Surface Shortwave Radiation general approach initial validation results first pre-operational images Surface Longwave Radiation general approach initial validation results first pre-operational images Conclusions Overview of Talk

3. 02.04.2004GIST 21 st, Boulder The Satellite Application Facility concept

4. 02.04.2004GIST 21 st, Boulder SAF - Structure and Hosts United Kingdom - UKMO - Numerical Weather Prediction Denmark - DMI - GRAS Portugal - IM - Land Surface Analysis Finland - FMI - Ozone Monitoring Spain - INM - Support to Now- casting and Very Short Range Forecasting France - MF - Ocean and Sea Ice Germany - DWD - Climate Monitoring E U M E T S A T

5. 02.04.2004GIST 21 st, Boulder CM-SAF: The Partners

6. 02.04.2004GIST 21 st, Boulder support climate monitoring at regional scale provide climate data sets provide validation data CM-SAF: objectives and characteristics Operational environment Long term with reprocessing capability Quality Assurance + Control provision of validated homogeneous and consistent data sets

7. 02.04.2004GIST 21 st, Boulder CM-SAF: The Area under investigation… > 2007 > 2004 > 2007 BL-Area: Europe and part of North Atlantic Ocean (60° W – 60° E, 30° N – 80° N) > 20??

8. 02.04.2004GIST 21 st, Boulder CM-SAF: The Schedule 20002010 123456 78 9 DEVELOPMENT PHASE B r i d g i n g P h a s e ENVISAGED incl. R&D O p e r a t i o n s MSG_1 (27.08.2002) METOP_1 IOP incl. R&D AVHRR+MSG / BL AVHRR BL AVHRR+MSG / FD

9. 02.04.2004GIST 21 st, Boulder The Surface Radiation Budget within the CM-SAF Satellite Application Facility on Climate Monitoring Surface Shortwave Radiation general approach initial validation results first pre-operational images Surface Longwave Radiation general approach initial validation results first pre-operational images Conclusions

10. 02.04.2004GIST 21 st, Boulder Surface Radiation Budget: Schematic overview of processing MSG (SEVIRI GERB) NOAA-AVHRR/EPS Cloudproducts Per pixel Surface Radiation Budget Per pixel Background LUT NWP-model data Gridding merging Albedo Per pixel

11. 02.04.2004GIST 21 st, Boulder Cloud top height March 2004 Full area has been split up into ~ 30 tiles for cloud processing 1 x 1 km² spatial resolution instantaneous data of an overpass 06.03.2004 02:48

12. 02.04.2004GIST 21 st, Boulder Monthly mean cloud cover Feb. 2004 Full area, 15 km x 15 km spatial resolution

13. 02.04.2004GIST 21 st, Boulder Solar Surface Radiation: General approach/Layout prototype Satellite Data int. water vapour  sfc  toa Surface Obs. e.g. spec. albedo maps, surface type GME analyses Background data & maps Validation Model runs of SHDOM for N atmosph. conditions Lookuptable for SIS = f (  sza,  _sfc  _toa,T) Inst. SIS monthly means, Daily means, mean diurnal cycle User Improvement

14. 02.04.2004GIST 21 st, Boulder Surface Shortwave Radiation (SIS): Validation Two initial validation exercises: Take GERB-like METEOSAT-7 fluxes as input + ECMWF model water vapour => case study for Cabauw 21-23.09.2001 Take ISCCP-DX data (cloud data + L vis ) + NTB + ECMWF water vapour  5 months for validation with surface meas.  Comparison with GEWEX-SRB for August 1995

15. 02.04.2004GIST 21 st, Boulder Surface shortwave radiation for 22. - 24. September 2001 *: METEOSAT derived fluxes : Measurements in Cabauw (NL)  : Cloudcover in % (given by satellite) Time in hours after 22. September 0:00 UTC Shortwave surface flux in W/m² Surface Shortwave Radiation: Validation (I) 100 % 0 %

16. 02.04.2004GIST 21 st, Boulder Payern, Switzerland Surface Shortwave Radiation: Validation (II) Satellite / W/m² In-situ / W/m²

17. 02.04.2004GIST 21 st, Boulder Arkona, Germany Satellite / W/m² In-situ / W/m² Surface Shortwave Radiation: Validation (II)

18. 02.04.2004GIST 21 st, Boulder NSTAT: Number of available validation stations, MA_ME: Measured monthly average, SI_ME: standard deviation of measured data, MA_CA.: Calculated monthly average, SI_CA: standard deviation of calculated data, BIAS calculated - measured in W/m² and % of measured average. Validation results of monthly means SIS, Based on ISCCP-DX/ECMWF input data Surface Shortwave Radiation: Validation (II)

19. 02.04.2004GIST 21 st, Boulder Comparison of SIS monthly mean with SRB-GEWEX (Aug. 1995) CM-SAF SIS in W/m² SRB-GEWEX SIS in W/m² (SW) Surface Shortwave Radiation

20. 02.04.2004GIST 21 st, Boulder Comparison of SIS monthly mean with SRB-GEWEX (Aug. 1995) Monthly mean, regional comparison 1° x 1° lat-lon SIS (CM-SAF) in W/m² SIS (GEWEX) in W/m² Y = 0.8799120291 * X + 16.22678981 Mean bias: 13 W/m² R-squared = 0.82 Surface Shortwave Radiation

21. 02.04.2004GIST 21 st, Boulder First results from February 2004: downwelling Shortwave Daily mean if 3 daylight overpasses Monthly mean if 20 daily means are present

22. 02.04.2004GIST 21 st, Boulder First results from February 2004: Surface albedo monthly mean

23. 02.04.2004GIST 21 st, Boulder The Surface Radiation Budget within the CM-SAF Satellite Application Facility on Climate Monitoring Surface Shortwave Radiation general approach initial validation results first pre-operational images Surface Longwave Radiation general approach initial validation results first pre-operational images Conclusions

24. 02.04.2004GIST 21 st, Boulder The Gupta Parameterisation Cloud-parameterisation Clear sky parameterisation The surface Radiation Budget within the CM-SAF: Longwave Radiation

25. 02.04.2004GIST 21 st, Boulder Surface Longwave Radiation (SDL): Validation Two initial validation exercises: Take radiosoundings for different BSRN stations, run Gupta with that and compare against surface measurements & RTM caculations (Fu-Liou)  case study for Lindenberg August 1995 Take ISCCP-DX cloud data + ECMWF profiles of water vapour and temperature  5 months for validation with surface meas.  Comparison with GEWEX-SRB for August 1995

26. 02.04.2004GIST 21 st, Boulder Investigations of SDL-Biases What is the effect of the improvements? 1995 1997

27. 02.04.2004GIST 21 st, Boulder Monthly mean of downwelling longwave radiation for August 1995 in W/m² Surface Longwave Radiation: Validation (II)

28. 02.04.2004GIST 21 st, Boulder Y=0.9659531439 * X + 6.998371831 mean CM-SAF DLF: 343.78 W/m² mean SRB GEWEX DLF: 339.07 W/m ² R=0.94 Surface Longwave Radiation: Validation (II) 1° x 1° lat – lon boxes

29. 02.04.2004GIST 21 st, Boulder First results from February 2004: downwelling Longwave Monthly average

30. 02.04.2004GIST 21 st, Boulder The Surface Radiation Budget within the CM-SAF Satellite Application Facility on Climate Monitoring Surface Shortwave Radiation general approach initial validation results first pre-operational images Surface Longwave Radiation general approach initial validation results first pre-operational images Conclusions

31. 02.04.2004GIST 21 st, Boulder The Surface Radiation Budget within the CM-SAF Satellite Application Facility on Climate Monitoring has started the pre-operational processing of NOAA-AVHRR overpasses Surface Radiation Processing improve aerosol information monitoring of pre-operational products test runs for GERB/SEVIRI (April 04) test runs with CERES input (~summer 04) Ongoing validation target months Oct. 2002, June 2003, Feb. 2004 building a matchup-database for validation Conclusion, future plans and activities