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-====== Open Source Unified EMEP model ======
-=====Welcome=====
-The EMEP models have been instrumental to the development of air quality policies in Europe since the late seventies, mainly through their support to the strategy work under the [[http://www.unece.org/env/lrtap/welcome.html|Convention on Long-range Transboundary Air Pollution]]. In the 1990's the EMEP models became also the reference atmospheric dispersion model for use in the Integrated Assessment Models supporting the development of air quality polices under the EU Commission. While results from the EMEP models have been largely distributed to the international community through the [[http://www.emep.int|EMEP programme]], this is the first time that model code of one of the EMEP chemical transport models is publicly available.
-This webpage releases the Unified EMEP model version rv3_7 together with a full input data set for 2008, under [[http://www.gnu.org/copyleft/gpl.html|GPL license v3]].
-The Unified EMEP model is designed to calculate air concentrations and deposition fields for major acidifying and eutrophying pollutants, photo-oxidants and particulate matter. The present release of the model is intended to:
-  * facilitate insight in the model assumptions, the parametrisations used, the requirements for input data and the actual model code
-  * encourage dialogue and collaboration with modelling community
-  * allow individual model runs and insight on how to run different scenarios
-Questions on the Unified EMEP model can be addressed to [[emep.mscw@met.no]]. Support to the user community will be developed here with your contribution. Please let us know what your needs for information are.
-=====Documentation=====
-The Unified EMEP model is a chemical transport model developed at the Air Pollution Section at the Norwegian Meteorological Institute (met.no) /Meteorological Synthesizing Centre - West (MSC-W). The Unified EMEP model is a limited-area, terrain following sigma coordinate model designed to calculate air concentration and deposition fields for
-    * acidifying and eutrophying compounds (S, N)
-    * ground level ozone (O3)
-    * particulate matter (PM2.5, PM10).
-as well as their long-range transport and fluxes across national boundaries (Transboundary air pollution). A history of the development of the Unified EMEP model can be found [[http://www.emep.int/models.html#mscwmodels|http://www.emep.int/models]].
-====Release calendar====
-  * **2008-02-07** First release of the Unified EMEP model code version rv3 under the GPL license v3. The release of the code included also a full input data set for 2005 covering the former EMEP domain and model results for comparison available from the Unified EMEP model [[ftp://ftp.met.no/projects/emep/emep_unified_model/|Open Source 2008 ftpsite]].
-  * **2011-04-01** Current release of the Unified EMEP model code version rv3_7 under the GPL license v3. The release of the code includes also a full input data set for 2008 covering the current EMEP domain (EECCA), some tools and model results for comparison available from the Unified EMEP model [[ftp://ftp.met.no/projects/emep/OpenSource2011/|Open Source 2011 ftpsite]].
-====Model Description====
-Documentation for this version of the model is currently (March 2011) being written up for submission to the EMEP special issue in the journal Atmos. Chem. and Physics. This paper
-will be referred to as Simpson et al. (2011), and if accepted links provided on the EMEP web-page. The provisional title and author list is:
-''Simpson, D., Benedictow, A., Berge, H., Bergstrom, R.  Fagerli, H., Gauss, M., Hayman, G.D., Jenkin, M.W., Jonson, J.E., Nyiri, A, Semeena, V.S, Tsyro, S., Tuovinen, J.P., Valdebenito, A., and Wind, P., The EMEP  MSC-W chemical transport model.''
-=====Download=====
-You are recommended to [[#registration_as_an_emep_user|register as an EMEP User]] and read all chapters of the Unified EMEP model {{:fou:UniUserGuide_20110331.pdf|User Guide}} before you start downloading data from the following links:
-  * a complete set of [[#input data]] to allow for model runs for year 2008
-  * the open source [[#model code]] of the EMEP Unified version rv3_7
-  * [[#model results]] for the year 2008 for comparison of a successful run
-  * [[#model tools]] available for reading sites and sondes output
-The [[#release_calendar|Release Calendar]] tracks historical and future release dates for new software versions and bug fixes. And before you start downloading please check the [[#computer_requirements|Computer Requirements]] to check the availability for performing a successful Unified EMEP model run.
-====Computer requirements====
-To compile the Unified EMEP model you need:
-  * Fortran 95 compiler
-  * NetCDF Library (>3.5.1)
-  * MPI Library (>1.0)
-It is necessary to compile with double precision reals (8 bytes reals). The program has
-been used on computers ranging from a Linux laptop to supercomputers (Itanium2 cluster,
-Intel Xeon cluster, Cray XT4, IBM power5+). It is compatible with all compilers tested
-so far: Intel, PGI, gfortran, XL fortran. A Makefile is included, the path to netcdf (INCL
-and LLIB) have to be adapted to your machine, and the fortran compiler (F90) and
-flags (F90FLAGS) to the compiler you are using.
-The code has been tested with 1 to 1024 CPUs, and scales well (for large grids). If
-only one CPU is used 1-2 GB memory is required. If more than one, for example 64
-CPUs are used, 200 MB of memory per CPU is enough (in the case of a 132 X 159 grid
-size). For runs on more than 32 CPUs, a fast interconnect is recommended (infiniband
-for example), for smaller runs, gigabit ethernet is sufficient. It takes ~3.5 hrs on 64*Xeon
-X5355 (2.66GHz) for 1 year simulation.
-When downloading input data in order to do a "base run" please make sure that there
-are 35 Gb disc space available, especially due to large meteorology input files. The model
-can be run for shorter periods, users can download meteorology for only the period they
-are interested in, pluss one day.
-====Registration as an EMEP User====
-It is recommended to [[http://dynamic.emep.int/forum/ucp.php?mode=login|register as an EMEP User]] before you start downloading any input data, model code or model results. Please read through the "Terms of use" and "Privacy Policy" thoroughly before you agree to the terms presented there.
-Your registration gives you access to the [[http://dynamic.emep.int/forum/|EMEP forum]] where questions and answers on the model code and its uses are to be exchanged. Support to the user community of the Unified EMEP model will develop here with your contribution.
-The information given about your e-mail adress in this registration is not to be distributed, but it is stored in a database only available to the administrator of this EMEP Forum. The database can be useful for the EMEP/MSC-W group to have the list of contacts if, for instance, special information about the EMEP model is to be distributed to the Users.
-====Input data====
-A complete set of input files is provided in a tar file available from the EMEP Open Source ftpsite [[ftp://ftp.met.no/projects/emep/OpenSource2011/input_data|input_data]] to allow model runs for the year 2008.
-**IMPORTANT:** The input data available in this ftpsite should be appropriately acknowledged when used for model runs. If nothing else is specified according to references further in this chapter, please acknowledge EMEP/MSC-W in any use of these data.
-The standard input files for the Unified EMEP model are provided in two different formats, netCDF or ASCII. The 3 hourly meteorological input data, BVOC emissions and the initial and boundary conditions of O3 are in netCDF format. All other input data are in ASCII. We presently follow as much as possible the [[http://www.unidata.ucar.edu/software/netcdf/conventions.html|netCDF CF1.0 conventions]] for both input and output data. More details about the input files are described in Chapter 1 of the Unified EMEP model {{:fou:UniUserGuide_20110331.pdf|User Guide}}.
-====Model Code====
-The Unified EMEP model code version rv3_7 are archived into a tar file available from the EMEP Open Source ftpsite [[ftp://ftp.met.no/projects/emep/OpenSource2011/model_code|model_code]]. The tar file include apart from the model source code itself, a runscript, a makefile and a copy of the gpl license. More details about the model code and how to submit a model run are described in the Unified EMEP model {{:fou:UniUserGuide_20110331.pdf|User Guide}}.
-The Unified EMEP model is very flexible with regard to the horizontal resolution and since 2008 the EMEP domain was extended to include EECCA countries. The current version, and the provided gridded input data, have a horizontal resolution of 50x50 km2 (at 60°N) and are defined on a polar stereographic projection.
-====Model Results====
-A reference run for the year 2008 has been done and the results of this run is made available from the EMEP Open Source ftpsite [[ftp://ftp.met.no/projects/emep/OpenSource2011/model_results_2008|model_results]] for comparison for new users to the Unified EMEP model. The main output files are in netCDF (CF1.0) format and some additional output files are in ASCII format. More details about the output files are described in Chapter 3 of the Unified EMEP model {{:fou:UniUserGuide_20110331.pdf|User Guide}}.
-====Model Tools====
-For users interested in reading the ascii site and sonde specfic outputs, two help programmes
-(Rd_sites.f90, Rd_sondes.f90) are provided from the EMEP Open Source ftpsite [[ftp://ftp.met.no/projects/emep/OpenSource2011/model_tools|model_tools]]. More details about the provided tools are described in the Unified EMEP model {{:fou:UniUserGuide_20110331.pdf|User Guide}}.
-=====Verification=====
-The Unified EMEP model is validated and reported to the Cooperative Programme for Monitoring and Evaluation of the Long-range Transmission for Air Pollutants in Europe ([[http://www.emep.int/|EMEP]]) each year by the EMEP/MSC-W group. The reports can be found under the following links:
-    * [[http://www.emep.int/publ/common_publications.html|Status Reports]]
-    * [[http://www.emep.int/OpenSource/index.html|Technical Reports]]
-    * [[http://www.emep.int/mscw/mscw_datanotes.html|Country Reports]]