Providing a place where researchers can connect with each other and share information about biogeochemical ecosystem modelling.
The GRAMP website infrastructure includes the following new features:
Model repository and model tree
As models are developed, a number of model variants will emerge due to changes in underlying assumptions about the system. To allow users to understand which variant they are using and which is best for their given purpose, documentation is needed to explain how each model version differs and why each was created. To help in this respect, GRAMP describes a framework for developing a “Model Tree” which shows similarities and differences in model variants, and provides a model repository for users to store and retrieve different versions online. GRAMP enables seamless management and code sharing between the GRAMP site and the model repository.
Model performance tool
Linking detailed model description with model performance might help improve process understanding and detection of the origin of model errors. Most of the time model calibration is carried out by trial and error or by using optimization techniques. Both of these methods are designed to search for combinations of parameters which provide the best fit. Model performance then has to be assessed against measurements. To allow the user to assess how well the model performs, a model application and performance tool has been developed which displays model performance in graphical and data format.
Publications database interface
Within the GRAMP site an application which interfaces with the publications database is being developed, linking detailed description and model performance. This will illustrate (through pie or bar charts) how the various biogeochemical models hosted at the GRAMP website are applied (by geography, activity, land use, etc.) and will allow the user to find published papers describing how well they perform in each situation.
These have been developed and integrated within the GRAMP site, and allow users to set up free online meetings, share desktops and telecast webinars. Our ambition is for the GRAMP website to become a vibrant virtual lab where modellers can come together to build capacity, share experience, correct errors and develop new insights.
The DNDC model is GRAMP’s flagship project which is growing and evolving rapidly. The GRAMP site currently includes information on the capabilities of the different versions of DNDC and allows viewers to explore each model through the Model Browser. The intention is for GRAMP to include other models over time.
Access GRAMP at http://www.gramp.org.uk/