1、Coupling of the GKSS Suspended Particular Matter (SPM) model with the DMI circulation model: BSHcmod Jens Murawski, Gerhard Gayer,WP6: YEOS Sediment transport model,The development of a prototype of aYellow-Bohai Sea sediment forecasting systemTask 6.5: Implementing and testing of the operational co
2、nfiguration of the GKSS-SPM model. First steps: Coupling of the GKSS-SPM model with the DMI circulation Model BSHcmod. Tests of the SPM-BSHcmod in the North Sea and Baltic Sea.,Whats done?,Rewriting of the f77-SPM-subroutines to f90 language: SPM_module.f90.Numerical Implementation of the GkSS-SPM m
3、odel into the DMI circulation model.Writing of Preprocessing skripts and tools to download and handle wave data.Modification of existing scripts to run the coupled SPM-circulation model, including preprocessing.First tests of the coupled SPM-circulation model in the North Sea / Baltic Sea using the
4、operational setup provided by the GKSS.,Motivation, Features,Why? SPM is of particular importance for the eccosystem. It regulates the penetration depth of light and influences the nutrients concentration in the water column. Where? The Suspendet Matter model is the collaborative development of the
5、GkSS research center and the BSH (Gerhard Gayer et al. 2005). Processes? The regional circulation model (cmod) was extended by an Suspended Particulate Matter module to include vertical exchange processes (sedimentation, resuspension and erosion), bottom processes (consumption and bioturbation) and
6、the horizontal redistribution of SPM due to currents and waves.Features? The new feature of the SPM model is the inclusion of wave effects into the description of the sediment dynamic. The SPM contribution of 79 rivers is included in the model.3 suspended matter fractions: wsink(frac1)=0.0001 m/s ws
7、ink(frac2)=0.00002 m/s wsink(frac3)=0.001 m/s,Modelled processes,Z1 = 0,1mm,Z2 = Z1,10cm,Z3 = hero,10cm,Z4 = 10cm,hero = 0,10cm,transport,vertical exchange,vertical exchange,transport,resuspension,erosion,sedimentation,Bioturbation, diffusion,sinking,1. currents:,2. waves:,Shear Stressvelocity,sinki
8、ng,sedimentation,1 water column: SPM dynamic,0.000195,0.000361,0.000386,0.000410,0.000431,0.000447,0.000459,0.000467,0.000469,0.000466,0.000458,0.000046,0.000093,6.65,6.65,2,08m,2,11m,From Sedimentation to Resuspension,0.000447,0.000445,0.000191,0.000365,0.000391,0.000417,0.000440,0.000460,0.000475,
9、0.000485,0.000490,0.000489,0.000485,0.0,0.000098,6.65,6.65,0.000478,0.000477,Increasing wave height,constant currents,NEA: 24 nm, NS: 6 nm, BS: 1nm,Model domains and nesting,no SPM,SPM,const. bv,const. bv,SPM-configuration at the sea bottom,Global,medium range:ECMWFRegional,short range: Hirlam4x/day
10、,Weather models,6,1,30,6 x 10,10,1,2 x 2,Wave model: WAM cycl. 4,Kitaigoroskii scaling,4x/day60h,River Inflow,Firth ofForth,Humber,Wash,Scheldt,Rhein,Weser,Elbe,q 10 mg/l,Scheldt 100 mg/lWash 60 mg/lHumber 55 mg/lFirth of Forth 48 mg/lElbe 38 mg/lWeser 35 mg/lRhein 30 mg/l,79 rivers,Cliffs,Suffolk 5
11、0 kg/sNorfolk 45 kg/sHolderness 58 kg/s,Suffolk,Norfolk,Holderness,English channel,Constant massInput rate at theSpecified gridpoints in theEnglish Channel(North Seaboundary) andat the Cliffs(Suffolk, Norfolk,Holderness),First results:runtime 23 dayslonger forerunneeded,Next steps,More and longer test runs in the North Sea. Comparrison of DMI model results with GKSS/BSH results.Going to the Yellow sea: SPM bottom configuration map? River loadings (annual variability)? Const. coarse grid boundary values?Validation data Yellow-Bohai Sea?Data assimilation: Satellite information?,Thank you,
