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Frank Selten, Xueli Wang Wilco Hazeleger, Rein Haarsma, Henk van den Brink,Pier Siebesma, Geert Lenderink, Peter van Velthoven, Alwin Haklander, Camiel.

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Presentatie over: "Frank Selten, Xueli Wang Wilco Hazeleger, Rein Haarsma, Henk van den Brink,Pier Siebesma, Geert Lenderink, Peter van Velthoven, Alwin Haklander, Camiel."— Transcript van de presentatie:

1 Frank Selten, Xueli Wang Wilco Hazeleger, Rein Haarsma, Henk van den Brink,Pier Siebesma, Geert Lenderink, Peter van Velthoven, Alwin Haklander, Camiel Severijns Experiments and sensitivity runs

2 10-year integrations at ECMWF Hindcasts with observed SSTs. Climatological SSTs - present climate - future climate (with future CO 2 concentr.) Sensitivity experiments: - Cloud parameterizations - Land model parameterizations

3 Computational costs 10 year run CY31R1 T95L40 = SBU Budget of EC-Earth group at KNMI: : 218 runs Additional budgets by means of special projects

4 PrepIFS

5 XCdp

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8 Too warm Mediterranean summer temperatures. This is known from RACMO limited area model which is forced by ERA-40 boundaries and has the same physics as IFS model. T2m temperatures in this area are sensitive to vegetation stress

9 Soil physics vegetation stress standard new Soil moisture

10 T2m 12 UTC August 1981 Effect of vegetation stress function in RACMO Standard – New

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15 Sensitivity for cloud parameters No lateral entrainment of thermals in dry convective boundary layer Increased top entrainment for stratocumulus CMIP project

16 Effect of no lateral entrainment on precipitation

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21 SSTs of future climate are computed from AR4 simulations (selected set). SRES-A1 scenario SSTs of control run are computed from ERA-40 data set

22 Summary Model has significant statistical errors Sensitivity runs to investigate origins of model errors. Results of RACMO are used to design these experiments. First GHG experiments are performed

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26 Oceaan model: OPA Huidige ocean-only configuratie: Resolutie: 1/4 graad tripolar grid met 46 lagen. Forcering: DFS3 (4 uurlijkse ERA40 T, q en wind, dagelijkse neerwaarste straling uit CORE, neerslag DRAKKAR set 3) Duur (1958 t/m 2001): 2 maanden op 88 CPUs van SGI Altix CPUs voor genereren van hoge resolutie forcering files en conversie van de output naar NetCDF. Optionele koppeling met PISCES NPZD biogeochemie model Hindcast data beschikbaar voor gebruikers Vanaf mei 2007 grove resolutie OPA gekoppeld aan ECMWF-IFS atmosfeer. (System 4)

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32 Samengevat Model kent behoorlijke systematische fouten Additionele specifieke simulaties en diagnostiek: - verandering bodemdikte/stress-functie - vertikale menging PBL minder - te laag warmtetransport door golven in stratosfeer Discussie via wiki pagina’s: ecearth.knmi.nl

33 Naast ‘tuning’ onderzoek Onderzoek naar wolken feedback in IFS in het kader van CFMIP: ‘cloud feedback intercomparison project’ Onderzoek naar impact stochastische parameterisaties van niet-opgeloste schalen

34 Integrated Forecast System Suite of different models Coupled using OASIS IFS atmospheric model Tessel land model Prescribed SSTs Prescribed atmospheric chemical composition Inclusion of ocean mixed layer model with Q-flux Fully coupled with OPA ocean model Experiments until now: Future experiments:

35 OASIS2 Atmosphere: IFS Ocean: HOPE Today: System 3 OASIS4 Atmosphere: IFS Ocean: OPA OASIS4 Atmosphere : IFS Ocean: OPA Sea-ice Land: IFS H-tessel Chemistry: TM5 Vegetation

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