Java Models of Earth System Regulation

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The Earth from space.
To try the models out for yourself, click here to go to the JModels website.
Simulating the dynamic equilibrium of the ocean's phosphorus cycle.
Welcome to JModels
Java Models of Earth System Regulation


The JModel suite consists of a number of models of aspects of the Earth System. They are written in the Java language for maximum portability, and are capable of running on most computing platforms including Windows, MacOS and Unix/Linux. The models are controlled via graphical user interfaces (GUI), so no knowledge of computer programming is required to run and perform experiments with them.

The models currently available from the JModels website are:

Ocean phosphorus cycle
Ocean cycle of
Ocean nitrogen and phosphorus cycles
Ocean cycles of
nitrogen and phosphorus
Ocean silicon and phosphorus cycles
Ocean cycles of
silicon and phosphorus
Ocean and atmosphere carbon cycle
Ocean and atmosphere
carbon cycle
Planetary radiation balance model


The main purpose of the models is to investigate how material and energy cycles of the Earth system are regulated and controlled by different feedbacks. While the central focus is on these feedbacks and Earth System stabilisation, the models can also be used in other ways and for this reason there are several different pathways through this Wiki.

Depending on your area of interest you should select between the following paths: