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SINERGEE update Richard Allan, Tony Slingo

Met Office, April 22 nd 2005. SINERGEE update Richard Allan, Tony Slingo Environmental Systems Science Centre, University of Reading Sean Milton, Malcolm Brooks, Jim Haywood Met Office. Recent ARG Comparison: 25 th April 1200 UTC. March 1 2005 comparison.

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SINERGEE update Richard Allan, Tony Slingo

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  1. Met Office, April 22nd 2005 SINERGEE update Richard Allan, Tony Slingo Environmental Systems Science Centre, University of Reading Sean Milton, Malcolm Brooks, Jim Haywood Met Office

  2. Recent ARG Comparison:25th April 1200 UTC

  3. March 1 2005 comparison Model GERB(ARG) OLR RSW ARG: 238th row ARG: 245th row

  4. Time-seriesGlobal and regional clear-sky time-series using collocated data

  5. Global Time Series: 2003-2005 MS7 processing 9 Mar cloud mask 18 Jan Model change 29 Sep,11Oct mod Nov, Dec, Jan 20, 22 Apr: improved geolocation 20 Dec: SW mod

  6. May 2003 to February 2005 Global Time Series: differencesModel minus GERB MS7 processing 9 Mar cloud mask 18 Jan Model change 29 Sep,11Oct mod Nov, Dec, Jan 20, 22 Apr: improved geolocation 20 Dec: SW mod

  7. Clear-sky Time-series: Mediterranean OLR Albedo dOLR GERB -Model dAlbedo

  8. Clear-sky Time-series: S. Atlantic OLR Albedo dOLR GERB -Model dAlbedo

  9. Model changes 18th January

  10. GERB (ARG) MODEL 1200UT Sahara: surface albedo change 17th& 18th Jan 0.5 0.4 0.3 0.2 0.1 0.0 MODIS 16-day surface albedo product

  11. Left: before Right: after GERB Model (or difference)

  12. Monthly mean comparisons

  13. GERB CERES July 2004 MeansOLRAlbedo

  14. GERB minus CERES July 2004 Means:GERB and CERES (AQUA-FM4-Ed2)

  15. Model and GERB means: June-July 2004

  16. Model and GERB means: Jan-Feb 2005

  17. Desert Dust: update- V3 TOMS data- July 2004 comparisons- Case Study?

  18. Model-GERB OLR Model-GERB(ARCH) OLR July 2004: Model minus GERB/ARCH OLR diff:1200 UT TOMS AOD_0.55 Model-GERB(ARCH) OLRc

  19. Model (Type I) GERB (ARCH) July 2004: Clear-sky OLRClear-sky OLR difference Model (Type I) minus GERB (ARCH)

  20. Possible Case Studies • July 2004 experiment • Desert Dust (e.g. 21 July 2004) • Cirrus Outflow (e.g. 1 July 2003) • Convection over land • Stratocumulus • Sahara albedo: further modifications?

  21. 21 July 2004 BT diff. Using LUTs

  22. Cirrus Outflow: OLR and vertical velocity, 1 July 2003 MODEL GERB MODIS cirrus

  23. Namibian Stratocumulus region31st March 2004

  24. Copnclusions • GERB-model comparisons continue • Model changes reduce differences • Sahara Albedo • Ocean clouds • Another big desert dust signal (July 2004) • Future plans • Experiments and case studies using Met Office NWP model

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