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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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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
March 1 2005 comparison Model GERB(ARG) OLR RSW ARG: 238th row ARG: 245th row
Time-seriesGlobal and regional clear-sky time-series using collocated data
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
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
Clear-sky Time-series: Mediterranean OLR Albedo dOLR GERB -Model dAlbedo
Clear-sky Time-series: S. Atlantic OLR Albedo dOLR GERB -Model dAlbedo
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
Left: before Right: after GERB Model (or difference)
GERB CERES July 2004 MeansOLRAlbedo
GERB minus CERES July 2004 Means:GERB and CERES (AQUA-FM4-Ed2)
Desert Dust: update- V3 TOMS data- July 2004 comparisons- Case Study?
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
Model (Type I) GERB (ARCH) July 2004: Clear-sky OLRClear-sky OLR difference Model (Type I) minus GERB (ARCH)
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?
Cirrus Outflow: OLR and vertical velocity, 1 July 2003 MODEL GERB MODIS cirrus
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