== Introduction ==
WRF for GRID (WRF4G) is a framework for the execution and monitoring of the WRF Modelling System in distributed computer resources (see this presentation). It provides a flexible and easy way of designing complex experiments involving many simulations (multiple start/end dates, multi-parametric simulations, long climate runs, ...). The monitor allows a precise control of the experiment's state, where broken simulations are automatically detected and relaunched at the next submission. 

Given a list of computer resources the user can access, WRF4G submits the experiment to them according to the experiment needs. Users can configure different kind of resources (Their local PCs, stand-alone servers, PBS or SGE Clusters,...) and use them at the same time to run different simulations of a WRF experiment. Output files are centrally stored regardless the computing resources used to run the simulations.

WRF4G separates the experiment design from the execution environment. To prepare a experiment, users are required to fill in two files: [wiki:WRF4Gexperiment_wrf4g experiment.wrf4g] which defines the WRF experiment, and [wiki:WRF4Gresources_wrf4g resources.wrf4g], where running environment and storage resources are configured. WRF4G provides a [wiki:WRF4GCommandLineInterface command line interface] that allow the users to prepare, run and monitor their experiments. 

The following picture shows the main WRF4G components and the interaction among them.

[[Image(wrf4g_workflow_ani.gif,50%)]]
 
== Documentation ==
 * [wiki:WRF4GFrameworkConfiguration WRF4G Framework]
 * [wiki:WRF4GInstall Installation Guide]
 * Tutorials: 
  * [wiki:WRF4GTutorial How to run a simple experiment] 
  * [wiki:WRF4GWRFReforecast How to run a reforecast experiment using WRF4G]
  * [wiki:WRF4GTutorial2 Advanced tutorial]
   * [wiki:WRF4GTutorial2#HowtomanageWRF4Gerrors How to manage WRF4G errors] 
   * [wiki:WRF4GTutorial2#HowtoaddnewcomputingresourcestoWRF4G How to add new computing resources to WRF4G]
   * [wiki:WRF4GTutorial2#HowtoaddanewWRFgeographicaldomain How to add a new WRF geographical domain]
   * [wiki:WRF4GTutorial2#Howtoreconfigurethefeaturesofanexperiment How to reconfigure the features of an experiment]
   * [wiki:WRF4GTutorial2#Howtoresubmitanexperiment How to resubmit an experiment]
   * [wiki:WRF4GTutorial2#Howtorerunaspecificchunkofarealization How to rerun a specific chunk of a realization]
   * [wiki:WRF4GTutorial2#Howtousewrf4g_killcommand How to use wrf4g_kill command]
 * [wiki:WRF4GCommandLineInterface WRF4G Command Line Interface]
 * [wiki:WRF4GWRFDistributions WRF Distributions]
 * WRF4G configuration files:
   * Resources setup 
    * [wiki:WRF4Gframework4g_conf framework4g.conf]
    * [wiki:WRF4GGridConfiguration gwd.conf]
   * Experiment setup 
    * [wiki:WRF4Gexperiment_wrf4g experiment.wrf4g]
    * [wiki:WRF4Gresources_wrf4g resources.wrf4g]
    * [wiki:WRF4GProlog prolog.wrf4g]
 * [wiki:WRF4GFAQ FAQ]

== Problems ==
If you happen to have any problems, please [https://www.meteo.unican.es/trac/meteo/newticket?component=WRF4G&owner=carlos&cc=antonio send us a ticket!!]