esbmtk 0.2.0

An Earth Sciences Box Modeling Toolkit

Table of Contents

1. ESBMTK - An Earth-sciences box modeling toolkit
2. News
3. Contributing
4. Installation
5. Documentation
6. Todo
7. License

ESBMTK - An Earth-sciences box modeling toolkit

ESBMTK is python library which aims to simplify typical box modeling projects the in Earth-Sciences. I started this project to teach myself python and explore object oriented programming. The code became however functional enough that the focus of this project has shifted to make box modeling more approachable for classroom teaching. So performance and scalability are not great. Specifically, the solved is a simple forward Euler scheme, so stiff problems are not handled gracefully.

At present, it will calculate masses/concentrations in reservoirs and fluxes including isotope ratios. It provides a variety of classes which allow the creation and manipulation of input signals, and the generation of graphical results. There is however no support for chemical reactions (including equilibrium reactions).

News

• Nov. 5^th, released version 0.2. This version is now unit aware. So rather than having a separate keyword for unit, quantities are now specified together wit their unit, e.g., rate = "15 mol/s". This breaks the API, and requires that existing scripts are modified. I thus also removed much of the existing documentation until I have time to update it.

• Oct. 27^th, added documentation on how to integrate user written process classes, added a class which allows for concentration dependent flux. Updated the documentation, added examples

• Oct. 25^th, Initial release on github.

Contributing

Don't be shy. Contributing is as easy as finding bugs by using the code, or maybe you want to add a new process code? If you have plenty of time to spare, ESMBTK could use a solver for stiff problems, or a graphical interface ;-) See the todo section for ideas.

Installation

ESBMTK relies on the following python versions and libraries

• python > 3.6
• matplotlib
• numpy
• pandas
• logging
• typing
• builtins
• nptyping
• numbers
• pint
• copy
• time

If you work with conda, it is recommended to install the above via conda. If you work with pip, the installer should install these libraries automatically. ESBMTK itself can be installed with pip

• pip install esbmtk

Documentation

The documentation is available in org format or in pdf format. See the documentation folder, specifically the quickstart guide.

At present, I also provide the following example cases (as py-files and in jupyter notebook format)

• A trivial carbon cycle model which shows how to set up the model, and read an external csv file to force the model.

pyramid shaped signal, and how to use the rate constant process to adjust concentration dependent flux ratesconcentration dependent flux rates.

Todo

• expand the documentation
• provide more examples
• do more testing

License

ESBMTK: A general purpose Earth Science box model toolkit Copyright (C), 2020 Ulrich G. Wortmann

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.