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# PHYEX INTRODUCTION
PHYsique EXternalisée

## About this document
This document is a presentation of the PHYEX package.
It is divided into different sections:
 - [Developer](./Developer.md): package organisation, how to contribute, coding norms
 - [Coding norms](./CodingNorms.md): coding norms
 - [Integrator](./Integrator.md): how to merge contributions
 - [Offline](./Offline.md): how to compile the library and the test programs, how to use the library with python and how to use the test programs
 - [Plugging](./Plugging.md) : how to plug the physics package in a model
 - [Tools](./Tools.md): description of the check\_commit\_\*.sh scripts (to check bit reproducibility between two commits) and of the prep\_code.sh script
This document is written using the markdown language. With pandoc, each md file can be converted to HTML (pandoc -s \<filename\>.md -o \<filename\>.html) or PDF (pandoc -s \<filename\>.md -o \<filename\>.pdf).
In addition, the tools directory contains the generate\_standalone\_doc.sh script that can build a standalone pdf or html file.
The physics was first developed for the [Meso-NH model](http://mesonh.aero.obs-mip.fr/).

Then, a part of the physics have been used to build the AROME model ([Seity et al, 2011](http://dx.doi.org/10.1175/2010MWR3425.1)).

The last evolution was to extract the physics to build the independent PHYEX package.
The following parametrisations are included in the PHYEX package (see the MesoNH documentation for references):
 - turbulence scheme
 - shallow convection scheme
 - microphysics schemes
In addition to the parametrisations source code, test programs and a library for python binding are also provided.