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Section Contents
- ISMstandard
ISM Metadata
The Ice Sheet Model (ISM) metadata is an attempt to standardise the data produced and consumed by ice sheet models. The proposed standard utilises the netCDF API and is based on the CF conventions for climate and forecast metadata. Defining metadata that describes what each variable represents allows data users to compare model results and develop and share powerful data processing and visualisation tools.
The ISM Metadata is intented to be an addition to the CF convention which is based on the COARDS conventions. Documentation of the CF convention can be found on the CF webpage.
News
- Ice Sheet Variables accepted by CF (24 November 2004)
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The variables defined here have been accepted to the CF standard. All further development will happen there.
- ISM-0.2 Released (20 October 2004)
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Some updates to the set of variable names. This version of standard names will be proposed to the CF mailing list.
- ISM-0.1 Released (20 November 2003)
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Initial release of the ISM conventions. Not many people have seen this yet.
Standard Name Table
The standard name table is intended to be an extension of the CF standard name table. It is written in xml and is described in the CF manual.| PDF version | HTML version | XML version |
Vertically Scaled Ice Thickness Variable
The simulated ice thickness is usually scaled to the interval [0,1], where the ice surface is at s=0 and the ice base at s=1. In analogy to the atmosphere_sigma_coordinate a variable land_ice_sigma_coordinate is defined:z(n,k,j,i) = topo(n,j,i) + (1-sigma(k))*thick(n,j,i)where topo(n,j,i) is the bedrock elevation and thick(n,j,i) the ice thickness at time n at node (j,i). See also the section on Vertical Coordinate Definitions of the CF manual.