Model:HAMSOM

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HAMSOM

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Summary Contact Technical specs In/Output Process Testing Other Component info Also known as Hamburg Shelf Ocean Model Model type Single Model part of larger framework Note on status model Date note status model Incorporated models or components: Spatial dimensions 3D Spatial extent Continental, Regional-Scale Model domain Coastal, Marine One-line model description 3D free surface and baroclinic hydrodynamic model Extended model description The development of the HAMSOM coding goes back to the mid eighties where it emerged from a fruitful co-operation between Backhaus and Maier-Reimer who later called his model 'HOPE'. From the very beginning HAMSOM was designed with the intention to allow simulations of both oceanic and coastal and shelf sea dynamics. The primitive equation model with a free surface utilises two time-levels, and is defined in Z co-ordinates on the Arakawa C-grid. Stability constraints for surface gravity waves and the heat conduction equation are avoided by the implementation of implicit schemes. With a user defined weighting between future and presence time levels a hierarchy of implicit schemes is provided to solve for the free surface problem, and for the vertical transfer of momentum and water mass properties. In the time domain a scheme for the Coriolis rotation is incorporated which has second order accuracy. Time- and space-dependent vertical exchange and diffusivity coefficients are determined from a simple zero-order turbulence closure scheme which has also been replaced by a higher order closure scheme (GOTM). The resolution of a water column may degenerate to just one grid cell. At the seabed a non-linear (implicit) friction law as well as the full kinematic boundary condition is applied. Seabed cells may deviate from an undisturbed cell height to allow for a better resolution of the topography. The HAMSOM coding excludes any time-splitting, i.e. free surface and internal baroclinic modes are always directly coupled. Simple upstream and more sophisticated advection schemes for both momentum and matter may be run according to directives from the user. Successful couplings with eco-system models (ECOHAM, ERSEM), an atmospheric model (REMO), and both Lagrangian and Eulerian models for sediment transport are reported in the literature. For polar applications HAMSOM was coupled with a viscous-plastic thermo-hydrodynamic ice model of Hibler type. Since about 15 years in Hamburg, and overseas in more than 30 laboratories, HAMSOM is already being in use as a community model. Keywords: Name Dr. Bernhard Mayer Type of contact Model developer Institute / Organization Center for Marine and Atmospheric Sciences. Institute of Oceanography Postal address 1 Bundesstr. 53. D-20146 Hamburg Postal address 2 Town / City Hamburg Postal code D-20146 State Country Germany Email address bernhard.mayer@zmaw.de Phone Fax Supported platforms Linux, Windows Other platform Programming language Fortran90 Other program language Code optimized Multiple Processors Multiple processors implemented Distributed memory Nr of distributed processors Nr of shared processors Start year development 1985 Does model development still take place? Yes If above answer is no, provide end year model development Code development status When did you indicate the 'code development status'? Model availability As code Source code availability (Or provide future intension) Source web address Source csdms web address Program license type GPL v3 Program license type other Memory requirements Typical run time Describe input parameters Topography 3D temperature and salinity field 2D sea surface height Tidal components River discharge 2D Meteo forcing Input format ASCII, Binary Other input format Describe output parameters Default: 3D Temperature and salinity field 3D Velocities 2D Sea Surface Height Output format Binary Other output format Pre-processing software needed? Yes Describe pre-processing software Post-processing software needed? Yes Describe post-processing software Visualization software needed? Yes If above answer is yes Other visualization software Describe processes represented by the model Describe key physical parameters and equations Describe length scale and resolution constraints Describe time scale and resolution constraints Describe any numerical limitations and issues Describe available calibration data sets Upload calibration data sets if available: Describe available test data sets Upload test data sets if available: Describe ideal data for testing Do you have current or future plans for collaborating with other researchers? Is there a manual available? No Upload manual if available: Model website if any Model forum / discussion board Comments This part will be filled out by CSDMS staff OpenMI compliant No but possible BMI compliant No but possible WMT component No but possible PyMT component Is this a data component Can be coupled with:

Model info Authors Dr. Bernhard Mayer Source code Model citations Nr. of publications: 61 Total citations: 1696 h-index: 26 m-quotient: 0.93 QR-code Link to this page Other models by author HAMSOM

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Nr. of publications:	61
Total citations:	1696
h-index:	26
m-quotient:	0.93

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