[GERB Logo image]

SImulations from an Nwp model to Exploit Radiation data from a new Geostationary satellite, Explore radiative processes and Evaluate models (SINERGEE)

The SINERGEE project exploits data from the Meteosat-8 geostationary satellite and simulations from the Met Office weather forecast model in studies involving data validation, model evaluation and to explore radiative processes. Initially comparisons of broadband radiative fluxes between the Geostationary Earth Radiation Budget instrument (GERB) and the Met Office forecast model are undertaken. It is planned to combine the GERB data with Spinning Enhanced Visible and Infra-Red Imaged (SEVIRI) products. Here is the latest SINERGEE comparison for 1200 UTC.

LATEST COMPARISONS | PAST COMPARISONS | MEAN COMPARISONS | ANIMATIONS | TIME SERIES | PUBLICATIONS | DOCUMENTS | METHOD | RESULTS | LINKS |

Near-real time comparisons of GERB and Met Office global model:

  • SINERGEE/RADAGAST comparsions over N. Africa: 1200 UTC | Niamey time-series
  • SINERGEE latest GERB(ARG product)+SEVIRI global comparisons: 0000 UTC | 0600 UTC | 1200 UTC | 1800 UTC
  • SEVIRI (ARG times): 0000 UTC (WV / IR) 0600 UTC (WV / IR) 1200 UTC (WV / IR) 1800 UTC (WV / IR)
  • ARCH OLR for LAM: Recent GERB/SEVIRI hybrid OLR product (ARCH) generated for use in evaluating Met Office Limited Area Model (LAM).
    Software monitoring: overnight sinergee jobs | 10-day sinergee processing | time-series | dabex | lam jobs

    If Radagast data miner dies...
    ssh -l radagast radagast.nerc-essc.ac.uk
    ps -aef | grep sentinel
     will show if the job is running or not. To re-acdtivate, type:
    g_sentinel a g
    Also look in $LOGS for a lock file; this should be here otherwise the job will kill itself.(gentinel_loop_xxxx). To stop cleanly, type:
    gentoff

    LINKS:
    GERB at Imperial (Secure old/Secure new) | RAL | RMIB | TOMS Aerosol | AERONET
    Meteosat-8 Dust products: Derived product dust imagery
    OVERALL MEANS:
    |     00 | 06 | 12 | 18 | CLEAR-SKY: 06 | 12 | 18 |
    ARCHIVED INSTANTANEOUS COMPARISONS (BARG/ARG/UM/SEVIRI)

    TIME-SERIES:
    Clear-sky comparisons:     Mediterranean ; S. Atlantic| All-sky comparisons: Global | Tropical Africa: land+sea, land only

    GLOBAL: 00 | 06 | 12 | 18 | ocean: 00 | 06 | 12 | 18 | land: 00 | 06 | 12 | 18 | Clear-sky ocean:12| Clear-sky land: 12|
    TROPICS: 00 | 06 | 12 | 18 | ocean: 00 | 06 | 12 | 18 | land: 00 | 06 | 12 | 18 |
    N.HEMIS: 00 | 06 | 12 | 18 | ocean: 00 | 06 | 12 | 18 | land: 00 | 06 | 12 | 18 | Clear-sky N.ATLANTIC ocean: 12 | 18 |
    S. HEMIS: 00 | 06 | 12 | 18 | ocean: 00 | 06 | 12 | 18 | land: 00 | 06 | 12 | 18 | Clear-sky S.ATLANTIC ocean: 12 | 18 |
    SUB SAT: 00 | 06 | 12 | 18 | ocean: 00 | 06 | 12 | 18 | land: 00 | 06 | 12 | 18 |
    W.SAHARA: 00 | 06 | 12 | 18 | Clear-sky :12

    CLEAR-SKY MEDITERRANEAN ocean 06 | 12 | CLEAR-SKY N. AFRICA land 06 | 12

    ADDITIONAL RESULTS

    DESERT DUST:
    July 2003 Comparison:     Clear-sky OLR | TOMS and MISR Aerosol Optical Depth | time series: July 2003 GERBLIKE

    CLOUD:
    Model OLR errors due to Cirrus Outflow (see also MODIS cirrus) and Albedo errors relating to Stratocumulus

    18 Jan Model Changes:
    12z 17th Jan | 18th Jan. | Mean differences (postscript | OLR | Albedo | OLR differences (more) |
    same analysis, new physics minus old for 2 timesteps(no green)(.ps.gz) |
    Sahara clear-sky Albedo and clear-sky OLR differences 1200 UTC and 0600 UTC

    CERES Comparisons (July 2004):

    means and differences.

    ANIMATIONS:
     Diurnal (Imperial) [MPG] | Latest GERB ARG

    July 2004 local time mean GERB animation: colour | greyscale (2.6 MB) (or try these: colour | greyscale [7.6 MB]) | July 2003 18z ARG (3.6 Mb) | July 2003 ARG (14.5 Mb)

    DOCUMENTS:

  • SINERGEE Report #1 (September 24 2003) | SINERGEE Report #2 (May 6 2004) | Namibian Stratocumulus (in progress) | Intraseasonal OLR variations (in progress)
  • GIST 24 (December 2005): Comparison of V999 and V002 GERB data (MS WORD | PDF [both about 1 MB each] | powerpoint presentation [9 MB])
  • Meeting Agenda's: 15/08/03 | 07/05/04 | 27/10/04
  • 6th SINERGEE Meeting (27th October 2004, summary to appear). Presentations (ppt): Tony Slingo | Sean Milton | Richard Allan | Nicolas Bellouin |
  • 22nd April 2005 SINERGEE meeting. Talks by Richard Allan, Sean Milton, Malcolm Brooks.

  • GERB Newsletter (secure): #1 |#2 |#3 |#4 |
  • Validation overview| RMIB GERB data user guide | Geolocation quality (GGSPS)

    PUBLICATIONS:

    Milton, S. F., G. Greed, M. A. Brooks, J. M. Haywood, B. Johnson, Allan, R. P. and A. Slingo, (2007), Modelled and observed atmospheric radiation balance during the West African dry season - the role of mineral dust, biomass burning and surface albedo, J. Geophys. Res., accepted

    Allan, R. P., A. Slingo, S.F. Milton and M.A. Brooks (2007), Evaluation of the Met Office global forecast model using Geostationary Earth Radition Budget (GERB) data, Q. J. Roy. Meteorol. Soc., 133, 1993-2010 (PDF)

    Comer, R.E., A. Slingo, R.P. Allan (2007),Observations of the diurnal cycle of outgoing longwave radiation from the Geostationary Earth Radiation Budget instrument, Geophys. Res. Lett., 34, L02823, doi:10.1029/2006GL028229. PDF Version

    Slingo, A., T. P. Ackerman, R. P. Allan, E. I. Kassianov, S. A. McFarlane, G. J. Robinson, J. C. Barnard, M. A. Miller, J. E. Harries, J. E. Russell, and S. Dewitte (2006), Observations of the impact of a major Saharan dust storm on the Earth's radiation balance, Geophys. Res. Lett., 33, L24817, doi:10.1029/2006GL027869. PDF Version

    Allan, R. P., A. Slingo, S.F. Milton and M.E. Brooks (2006), Exploitation of Geostationary Earth Radiation Budget (GERB) data from 2003-2006 in the evaluation of the Met Office global NWP model, EUMETSAT P.48, Proceedings of the EUMETSAT Meteorological Satellites Conference, Helsinki, Finland Word document | PDF

    Comer, R. E., A. Slingo, R. P. Allan, (2006), The diurnal cycle observed by Meteosat-8 and simulated by a climate model, EUMETSAT P.48, Proceedings of the EUMETSAT Meteorological Satellites Conference, Helsinki, Finland PDF

    Allan, R. P. (2006), using satellite observations and reanalyses to evaluate climate and weather forecast models, in Current Problems in Atmospheric Radiation (Eds. H. Fischer and B.-J. Sohn), Proceedings of the International Radiation Symposium, 23-28 August 2004, Busan, Korea p.451-454.. PDF document

    Allan, R. P., A. Slingo, S.F. Milton I. Culverwell, Exploitation of Geostationary Earth Radition Budget data using simulations from a numerical weather prediction model: Methodology and data validation, J. Geophys. Res., 110, D14111, 10.1029/2004JD005698, 2005. (PDF)

    Harries, J. E. and coauthors (including A. Slingo and R. P. Allan), The Geostationary Earth Radiation Budget (GERB) Experiment, Bull. Amer. Meteorol. Soc., 86, 945-960, 2005. (PDF)

    Haywood, J. M., R. P. Allan, I. Culverwell, A. Slingo, S. Milton, J. M. Edwards and N. Clerbaux, Can desert dust explain the outgoing longwave radiation anomaly over the Sahara during July 2003? J. Geophys. Res., 110, D05105, doi:10.1029/2004JD005232, 2005. (PDF) | Colour Figures (PDF).

    Milton, S. F., M. Brooks, A. Lock, E. Whelan, D. Wilson and R. P. Allan, 2005, HadGEM1 Physics for the Global NWP Model (Cycle G34): Improvements to Boundary Layer, Large Scale Precipitation, Convection and Saharan Albedo, 2005 NWP Technical report 458, pp. 39 (PDF version)

    Haywood, J. M., R. P. Allan, I. Culverwell, A. Slingo, S. Milton, J. Edwards, 2004, Can desert dust explain the anomalous greenhouse effect observed over the Sahara during July 2003 revealed by GERB/UM intercomparisons, MRF Technical note 49 pp. 32. PDF document

    Allan, R. P., A. Slingo, S. Milton and I. Culverwell, SINERGEE: simulation and exploitation of data from Meteosat-8 using an NWP model, EUMETSAT Meteorological Satellites Conference, Prague, Czech Republic, p. 122-130, 2004 PDF document

    Russell, J. E., J. M. Futyan, R. P. Allan, J. E. Harries, A. Slingo, S. Dewitte and N. Clerbaux, Strategies for determining clear-sky fluxes from GERB data, EUMETSAT Meteorological Satellites Conference, Prague, Czech Republic,p. 490-497, 2004 PDF document

    Russell, J. E., J. E. Harries, J. Hanafin, H. Brindley, J. M. Futyan, R. P. Allan, A. Slingo, and M. A. Ringer, The Geostationary Earth Radiation Budget (GERB) experiment: science and applications, EUMETSAT Meteorological Satellites Conference, Weimar, Germany, 2003 PDF document

    SINERGEE PROCESS

    1) Data from the GERB instrument is retrieved at the GGSPS at RAL and transfered to RMIB for processing
    2) Using SEVIRI imager data (or Meteosat data before SEVIRI data is available) processing of the GERB radiances is undertaken: Using BRDFs, radiative fluxes are calculated from the radiances.
    3) Hook jobs are initiated at the Met Office to calculate diagnostics from the forecast analysis for comparison with the RMIB GERB data and eventually the SEVIRI radiances.
    4) GERB data and Met Office data are retrieved by ftp and transferred to ESSC.
    5) GERB data is regridded to allow comparison with the Met Office products.
    6) Comparison of GERB and Met Office model radiative fluxes are undertaken. (Use of SEVIRI data will eventually be an important part of these comparisons).
    7) Information on the health of the satellite instruments and the skill of the Met Office model will be fed back through the appropriate channels.
    8) As the project progresses, more substantial evaluation of the model and the present day climate can be undertaken.

    GERB products are available via the     RMIB website (or at ftp://gerb.oma.be).