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Numerical Simulations of Catastrophic Floods in China with Regional Climate Model Yiming Liu, Yihui Ding et al. (National Climate Center)

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  • Numerical Simulations of Catastrophic Floods in China with Regional Climate ModelYiming Liu, Yihui Ding et al.(National Climate Center)

  • ContentFrame of RegCM/NCCSimulative ExperimentsConclusions and Discussion

  • Frame ofRegCM/NCC

  • RegCM/NCC Domaincenter point:115E,30Nresolution:60km60km 16

  • Vertical grid structure in RegCM/NCC

  • Modification of NCAR RegCM2Physical Process NCAR RegCM2 RegCM/NCC Land-surface LPM1process BATS LPM2 Cumulus KuoAnthes Mass Flux Scheme convection Grell BettsMillerRadiation transfer CCM2 CCM3 PBL Holtslag TKE

    the Tibetan Plateauthe Three-Dimensional nesting method

  • Initial datalateral boundary dataRegCM/NCC 70-160E, 10-60Ncenter point: 115E, 30N60km 60km 16RegCM/NCCLand-use datasurface dataLPM1LPM2Mass Flux SchemeBetts-MillerCCM3 radiation schemeTerrainTKE schemeThree dimensional nestingOut dataT,Pr,q,u,v,H,Tsoil,qsoil

  • Simulative Experiments

  • Land-surfaceProcess

    OBSLPM-I BATS

    TsJune 1991

  • LPM-2 OBS BATSPrecipitation June 1994

  • ConvectionPrecipitationJune 1991OBSKUOMFS

  • Daily precipitation averaged over region (114-122E,28-34N)In May-July 1991mm/dBlack: OBSGreen: KuoBlue: GrellRed: MFS

  • ConvectionPrecipitationMay-July 1994OBSKuoMFS

  • Convection

    Betts-Millerscheme

    Precipitation1st May -15th July 1991

  • OBS Kuo

    Betts-MillerPrecipitationJune-July 1998

  • CCM2CCM3precipitationMay-July 1998Radiation OBS

  • PBL

    Hotslag

    TKE

    (grasslandplateaucropdesertocean)

  • June 20-30

    July 10-31

    August 1-10

    NCEP Hotslag TKE Daily precipitation (mm/d)

  • Observation

    Height700hPaMay 1-12 1991

  • 2-D nesting methodHeight700HpaMay 1-12 1991

  • 3-D nesting methodHeight700hPaMay 1-12 1991

  • Height 700hPa July 31 1991observation 2-D nesting method 3-D nesting method July 1-31 1991 May 1- July 31 1991

  • May 25,1991Wind, 200hPa

  • May 25,1991Wind, 500hPa

  • May 25,1991Wind, 850hPa

  • Compare of rain belt between OBS and simulation ( RegCM/NCC )

  • Rainfall June 1994

    OBS RegCM2 TKE , TKE, MFS, BM Radccm3, RadCCM3

  • TKE,MFS,RADccm3 TKE,BM,RADccm3 OBS RegCM2Rainfall July 1994

  • Conclusions and DiscussionRegCM/NCC is feasible and steady.Simulative results show that the new schemes can improve the simulation in some degree.In next 1-2 years we will make more simulations and predictive experiments to verify the performance of RegCM/NCC.

  • Thank you.

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