This numerical package has been built up in order to examine a linear dynamics in the atmosphere, such as to compute steady linear response to a prescribed forcing, eigenanalysis, and so on.

Fully nonlinear climate models, like atmospheric general circulation models (AGCMs), are recently getting more and more realistic, indicating that they can be used to simulate and understand current climate which involves a number of feedback processes. However, such models are enough complicated, perhaps as well as in nature, making the interpretation --- what is going on in the model --- difficult without carring out thorough analyses of the outputs.

The linearized atmospheric model contained in this package was aimed to help understanding the complicated sequence of feedback in the dynamical atmosphere, by removing nonlinearity in their processes. The dynamical framework is simplified in this model, so that the results would be much easily interpreted. Besides, the package supplies several techniques to deal with linear dynamics, which may be useful to investigate various aspects of the large--scale, atmospheric circulation. On this regard, the linear model is expected to be a powerful tool for climate, in particular meteorological, studies. Models and diagnostic techniques provided by this package include;

• staedy linear response to prescribed forcing which can be solved with
  • direct method
  • time integration of the linear model
  • accelerated iterative method (AIM)
• storm track model
• eigenmode and singular mode computation
• moist linear baroclinic model
• nonlinear dynamical model
• linear barotropic model

2. Development

3. Documents

4. Latest version code

5. Publications using the LBM