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How to ... ?

There is a huge number of possibilities to choose from: 104 published models and 623 qualities, combinable with 50 output possibilities make up a grand total of roughly 3.53*10220 possible combinations to build your custom query. Although I did my best to keep the input form as simple as it is possible without a reduction in functionality, it will naturally take some time to get familiar with it.

The input form is split up in two pages. In the first introductory one you can either redo some queries or customize how the second page of the form will look like. Since everything you choose here will only affect the second page you can also skip this step by clicking on "Continue (directly) to model and quality selection".

The main input on either page will happen in those pairs of big selector boxes. On the left side is always listed what is available, on the right side what you picked. You can add new items to the right list by selecting them in the left one and pressing the right arrow button; accordingly you may remove elements from the right list by selecting them in the right list and pressing the left arrow button.

To understand what happens if you vote for the forth possibility on the first page, you should have a short look on the second one: There is a selector box here where you can choose which models to compare. In the standard case models are grouped by their scale, and sorted by their name. Though this box will be most helpfull when you know the models by their name or are interessted in comparing models of a specific scale. On the other hand this box doesn't give you any clue wether for example the model's source code is available or not.

This is where the selector boxes on page one get important: There you can choose by which (boolean) qualities the models will be grouped in page two. So the standard case is equivalent to choosing "microscale", "mesoscale" and "macroscale" in this box. If you are now interested in comparing all meteorological models that employ the Boussinesq approximation, and that are easy to operate you should choose "Model type > Meteorology" "Approximations > Boussinesq" and "Level of knowledge ... > Basic". Proceeding to the second page you will now find all models that suit your needs grouped together.

This works equally well, if you're looking for the negation of some quality. Let's assume you want to compare all non-hydrostatic macroscale models - then you should choose "Approximations > hydrostatic" and "Model scale > macroscale" on the first page. On page two there will be a section labelled solely "macroscale" that contains what you asked for.

 Now that you got the models grouped according to your wishes, you can continue actually selecting the models to compare, and the qualities to be compared with. These selector boxes work in the same way as the one on the first page and described above.

In the bottom section of the second page you can name your query, and specify how the output should look like. The first drop down box definies the generic type - if to render the result as a new html page or export it in xml, csv or LaTeX format. Furthermore you may find it usefull to transpose the whole table (second drop down box) or limit the qualities picked above to only textual or only boolean ones. Since some texts get quite long and hence destroy the table layout you can also truncate all texts to 128 characters.

That's it. You should now be able to quickly query every aspect of every model. If not so, there are some usefull hints and FAQs below ...


  1. Selection does not play any role when submitting the form
    Please make sure you always press the arrow buttons to apply changes before you submit the form. The only thing that matters on the following page(s) is what was listed in the right selector box.
  2. You cannot remove or add the bold and italic items in the list
    These are categories. Thier only purpose is to set a context for the qualities or models listed. Therefore these items can't be moved in either direction.


  1. How do I cite results from this database?
    Please cite this database as: "This publication is based on the Cost728/Cost732 Model Inventory to be found at http://www.mi.uni-hamburg.de/costmodin".
  2. Further questions?
    Please don't hesitate to ask Heinke Schluenzen.