Model:HAMSOM

HAMSOM

Metadata

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
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exchange and diffusivity coefficients are determined from a simple zero-order turbulence closure scheme which has also been replaced by a higher order closure scheme (GOTM).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	NO 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
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Code development status
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Model availability	As code
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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
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Pre-processing software needed?	Yes
Describe pre-processing software
Post-processing software needed?	Yes
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Visualization software needed?	Yes
If above answer is yes
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Is there a manual available?	No
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OpenMI compliant	Not yet"Not yet" is not in the list (Yes, No but planned, No but possible, No not possible) of allowed values for the "Code openmi compliant or not" property.
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WMT component	Not yet"Not yet" is not in the list (Yes, In progress, No but possible, No not possible) of allowed values for the "Code CMT compliant or not" property.
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Model info

Authors

Dr. Bernhard Mayer

Source code

Model citations

Nr. of publications:	62
Total citations:	1821
h-index:	26
m-quotient:	0.9

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HAMSOM

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References

Nr. of publications:	62
Total citations:	1821
h-index:	26
m-quotient:	0.9

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