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|<p><font color="#FFFFFF" size="+3">'''GEOS&#150;Chem Wiki'''</font></p>
|<p><font color="#FFFFFF" size="+3">'''GEOS&#150;Chem Wiki'''</font></p>


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----


<p align="center"><big>'''GEOS-Chem Community Mission: to advance understanding of human and natural influences on the environment<br>through a comprehensive, state-of-the-science, readily accessible global model of atmospheric composition.'''</big></p>
<p align="center"><big>'''GEOS-Chem Community Mission: to advance understanding of human and natural influences on the environment<br>through a comprehensive, state-of-the-science, readily accessible global model of atmospheric composition.'''</big></p>


The [http://acmg.seas.harvard.edu/geos/ GEOS–Chem model] is a global 3-D model of atmospheric composition driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the [http://gmao.gsfc.nasa.gov/ NASA Global Modeling and Assimilation Office]. It is applied by [http://acmg.seas.harvard.edu/geos/geos_people.html research groups around the world] to a wide range of atmospheric composition problems, Central management and support of the model is provided by the [http://acmg.seas.harvard.edu/index.html Atmospheric Chemistry Modeling Group at Harvard University.]
The [http://geos-chem.org GEOS–Chem model] is a global 3-D model of atmospheric composition driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the [http://gmao.gsfc.nasa.gov/ NASA Global Modeling and Assimilation Office]. It is applied by [https://geoschem.github.io/geos-chem-people-projects-map/ research groups around the world] to a wide range of atmospheric composition problems. Central management and support of the model is provided by the [https://acmg.seas.harvard.edu/ Atmospheric Chemistry Modeling Group at Harvard University] and by the [https://sites.wustl.edu/acag/ Atmospheric Composition Analysis Group at Washington University].


This wiki is meant to facilitate communication between GEOS-Chem users and developers. If this is '''your first time here''', check out [[Features of the GEOS-Chem public wiki|the features page]]. If you would like to contribute to the wiki, please register as a user by clicking ''create account'' at the top right corner of this page.
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New information is continually being added to the wiki, so please check back here often, or even better, [[Features_of_the_GEOS-Chem_public_wiki#Let_the_GEOS-Chem_wiki_inform_you_of_recent_changes.21|subscribe to the recent changes' RSS feed]]: you will not miss a discussion!
{|border="1" width="925px" bordercolor="#000000" cellspacing="0" cellpadding="5"
 
|-valign="top"
|colspan="3" align="center" bgcolor="#CCCCCC"|'''<font size="+2">[[GEOS-Chem overview]]</font>'''
|-valign="top"
|width="225px" align="center"|<font size="+2">[[GEOS-Chem versions|Past releases]]</font>
|width="450px" align="center" bgcolor="#CCFFFF"|<font size="+2">[[GEOS-Chem 14.4.0|'''Current release: GEOS-Chem 14.4.0''']]</font>
|width="225px" align="center"|<font size="+2">[[GEOS-Chem model development_priorities|Future releases]]</font>


|}
|}


{|border="1" width="1000px" bordercolor="#000000" cellspacing="0" cellpadding="5"
== News ==
|-valign="top" align="center"
*31 May 2024: [[GEOS-Chem 14.4.0]] is now available!
|width="334px"|'''Getting started w/ GEOS-Chem:'''
*02 Feb 2024: Read the [https://drive.google.com/file/d/1v0cHAf6S8EMpUZNb7eVqvcRwbIAIxpRI/view?usp=sharing GEOS-Chem Newsletter 2024, Issue #1]
|width="333px"|'''[[GEOS-Chem welcome letter for new users|Welcome letter for new users]]'''
*A [https://scholar.google.com/citations?user=ho-sNj4AAAAJ GEOS-Chem Google Scholar page] is now available!
|width="333px"|'''[[GEOS-Chem basics]]'''
**Click 'Follow' to be notified of new publications.
**Contact [mailto:rebekah.horner.20@ucl.ac.uk Bex Horner] with issues or questions.
*The GEOS-Chem Youtube Channel has 350+ subscribers and a new URL: <tt>'''https://www.youtube.com/~geoschem'''</tt>
*NASA/GMAO is now producing [https://gmao.gsfc.nasa.gov/weather_prediction/GEOS-CF/ GEOS chemical forecasts (GEOS-CF)] using GEOS-Chem coupled to the NASA/GEOS ESM


|-valign="top" bgcolor="#CCFFFF" align="center"
For access to all past GEOS-Chem newsletters, visit [[GEOS-Chem newsletters|this page]].
|'''Current public release:'''
|'''[[GEOS-Chem v10-01]]'''
|'''[[GEOS-Chem v10-01 benchmark history|v10-01 benchmark history]]'''


|-valign="top" align="center"
== Documentation ==
|'''Version in development:'''
|'''[[GEOS-Chem v11-01]]'''
|'''[[GEOS-Chem v11-01 benchmark history|v11-01 benchmark history]]'''


|-valign="top" align="center"
=== GEOS-Chem manuals and tutorials ===
|'''Version for HPC environments:'''
|'''[[GEOS-Chem HP]]'''
|'''[[GEOS-Chem HP Dev Kit]]'''


|-valign="top" align="center"
Read [https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/related-docs.html '''user manuals'''] for GEOS-Chem 14 and related software.
|'''List of publications:'''
|'''[http://acmg.seas.harvard.edu/geos/geos_pub.html Refer to this page]'''
|


|}
Also see our list of [[Software_maintained_by_GEOS-Chem_community_members|'''software tools maintained by GEOS-Chem users''']].


<br>
The user manual for GEOS-Chem 13.4.1 and prior versions may be found '''[[Getting Started with GEOS-Chem|HERE]]'''.


{|border="1" width="1000px" bordercolor="#000000" cellspacing="0" cellpadding="5"
=== General information about GEOS-Chem ===


|-height="50" bgcolor="#00AAAA" align="center"
The table below lists where you can find general information about GEOS-Chem.
|colspan="2"|<p><font color="#FFFFFF" size="+2">'''General information about GEOS-Chem'''</font></p>


|-valign="top" bgcolor="#CCCCCC"
{| border=1 cellpadding=5 cellspacing=0
!width="1000px" colspan="2"|<big>Introduction to GEOS-Chem and the International GEOS-Chem User Community</big>


|-valign="top"
|-valign="top"
|width="500px"| <!-- Intro and overview -->
!width="200px" bgcolor="#CCCCCC"|Item
*[http://acmg.seas.harvard.edu/geos/geos_overview.html Overview of GEOS-Chem and its user community]
!width="360px" bgcolor="#CCCCCC"|Link
**[http://acmg.seas.harvard.edu/geos/geos_people.html GEOS-Chem People & Projects]
!width="365px" bgcolor="#CCCCCC"|Description
** [[GEOS-Chem Support Team]]
** [[GEOS-Chem newsletters]]
** [http://acmg.seas.harvard.edu/geos/geos_new_developments.html Recommendations for offering co-authorships to GEOS-Chem developers]
** [http://acmg.seas.harvard.edu/geos/geos_dev_history.html GEOS-Chem code development history]
* [[GEOS-Chem basics|Basic information about getting set up with GEOS-Chem]]
** [[GEOS-Chem welcome letter for new users]]
** [http://acmg.seas.harvard.edu/geos/word_pdf_docs/resources_guidelines_tips.pdf User Resources, Code Development Guidelines, and Debugging Tips]
** [[Features of the GEOS-Chem public wiki]]
** [[Customizing your GEOS-Chem Wiki Settings]]
** [http://acmg.seas.harvard.edu/geos/geos_search.html GEOS-Chem Search Engines]
|width="500px"| <!-- Steering committee etc -->
* [http://acmg.seas.harvard.edu/geos/geos_steering_cmte.html GEOS-Chem Steering Committee]
** [[GEOS-Chem model development priorities]]
* [http://acmg.seas.harvard.edu/geos/geos_working_groups.html GEOS-Chem Working Groups]
** [[GEOS-Chem Adjoint|Adjoint Model and Data Assimilation Working Group]]
** [[Aerosols Working Group]]
** [[Carbon Cycle Working Group]]
** [[Chemistry-Climate Working Group]]
** [[GEOS-Chem High Performance Working Group]]
** [[Hg and POPs Working Group]]
** [[Organics Working Group]]
** [[Chemistry Issues|Oxidants and Chemistry Working Group]]
** [[Nested Model Working Group]]
** [[Sources and Surface Uptake Working Group]]
** [[Transport Working Group]]


|-valign="top" bgcolor="#CCCCCC"
|-valign="top"
!width="1000px" colspan="2"|<big>Getting started with GEOS-Chem</big>
|'''GEOS-Chem website'''
|[http://www.geos-chem.org geos-chem.org]
|Website that links to GEOS-Chem information and resources


|-valign="top"
|-valign="top"
|
|'''Welcome Letter'''
* [[GEOS-Chem basics]] (e.g. tutorials, user guides, etc.)
|[http://geos-chem.org/welcome.html geos-chem.org/welcome.html]
* [[Frequently asked questions about GEOS-Chem]]
|A welcome letter for new users of GEOS-Chem
* [[Minimum system requirements for GEOS-Chem]]
* [[Downloading GEOS-Chem source code and data]]
* [[GEOS-Chem performance]]
* [[Creating GEOS-Chem run directories]]
* [[GEOS-Chem coding style guide]]
* GEOS-Chem [[GEOS-Chem horizontal grids|horizontal grids]] and [[GEOS-Chem vertical grids|vertical grids]]
|
* [[Initial conditions for GEOS-Chem]]
* [[Centralized chemistry time step]]
* [[GEOS-Chem coding and debugging#GEOS-Chem debugging tips|Tips on how to debug GEOS-Chem effectively]]
* [[Parallelizing GEOS-Chem]] with the OpenMP directives
* [[Common GEOS-Chem error messages]]
* [[Adding tracers to GEOS-Chem|Adding tracers to GEOS-Chem (v10-01 and prior)]]
* [[GEOS-Chem_species_database#Adding_new_species_to_the_GEOS-Chem_species_database|Adding species to GEOS-Chem (v11-01 and later)]]
* [[Adding passive species to GEOS-Chem]]
|}


<br>
|-valign="top"
 
|'''GEOS-Chem Overview'''
{|border="1" width="1000px" bordercolor="#000000" cellspacing="0" cellpadding="5"
|[[GEOS-Chem overview]] (wiki page)
 
|A page with linking to many GEOS-Chem topics.
|-height="50" bgcolor="#00AAAA" align="center"
|colspan="2"|<p><font color="#FFFFFF" size="+2">'''GEOS-Chem Code Developers' Forums'''</font></p>
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Coding</big>
!width="500px"|<big>Meteorological Fields</big>


|-valign="top"
|-valign="top"
| <!-- Coding -->
|'''GEOS-Chem Narrative'''
*Software development
|[http://geos-chem.org/narrative.html geos-chem.org/narrative.html]
**[[GEOS-Chem versions under development]]
|A narrative descrption of GEOS-Chem that you can include in scientific papers (plus instructions for citing GEOS-Chem)
**[[Version control with Git]]
*[[GEOS-Chem coding and debugging]]
**[[GEOS-Chem coding style guide]]
**[[Bugs and fixes|List of GEOS-Chem bugs and in which version they were resolved]]
**[[Currently unresolved issues in GEOS-Chem]]
**[[Known issues caused by compiler bugs|Known GEOS-Chem issues caused by compiler bugs]]
**[[Machine issues & portability|Machine issues and portability]]
**[[Debugging with the GEOS-Chem unit tester]]
**[[Common GEOS-Chem error messages]]
**[[GEOS-Chem_coding_and_debugging#Reporting_GEOS-Chem_bugs_to_the_GEOS-Chem_Support_Team|Reporting GEOS-Chem bugs to the GCST]]
*[[GEOS-Chem performance]]
**[[Profiling GEOS-Chem]]
**[[Passing array arguments efficiently in GEOS-Chem]]
**[[Floating point math issues]]
**[[GEOS-Chem performance#7-day time tests|Results from 7-day timing tests]]
| <!-- Met fields -->
*[[Overview of GMAO met data products]]
**[[Version history of GMAO met data products]]
**[[Available met data for nested grid simulations]]
**[[List of reprocessed met fields]]
*[[MERRA-2|GMAO MERRA-2]]
**[[List of MERRA-2 met fields|List of MERRA-2 met fields used by GEOS-Chem]]
**[[MERRA-2 implementation details|Implementing MERRA-2 into GEOS-Chem]]
*[[GEOS-FP|GMAO GEOS-FP]]
**[[List of GEOS-FP met fields|List of GEOS-FP met fields used by GEOS-Chem]]
**[[GEOS-FP implementation details|Implementing GEOS-FP into GEOS-Chem]]
*[[MERRA|GMAO MERRA "reanalysis"]]
**[[List of MERRA met fields|List of MERRA met fields used by GEOS-Chem]]
**[[MERRA implementation details|Implementing MERRA into GEOS-Chem]]
*[[GEOS-5|GMAO GEOS-5.2.0]]
**[[List of GEOS-5 met fields|List of GEOS-5.2.0 met fields used by GEOS-Chem]]
**[[GEOS-5 issues|Issues with GEOS-5.2.0 met data]]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Emissions</big>
!width="500px"|<big>Chemistry</big>


|-valign="top"
|-valign="top"
|<!-- Emissions -->
|'''GEOS-Chem New Developments'''
*[[HEMCO|HEMCO emissions component]]
|[http://geos-chem.org/new-developments.html geos-chem.org/new-developments.html]
**[[HEMCO data directories]]
|A list of significant GEOS-Chem updates and the developers who worked on them
**[[The HEMCO User's Guide]]
**[[Implementation of HEMCO in GEOS-Chem]]
*Emissions categories
**[[Aerosol emissions]]
**[[Aircraft emissions]]
**[[Anthropogenic emissions]]
**[[Scale factors for anthropogenic emissions]]
**[[Biofuel emissions]]
**[[Biogenic emissions]]
**[[Biomass burning emissions]]
**[[Lightning NOx emissions]]
**[[Ship emissions]]
**[[Soil NOx emissions]]
**[[Volcanic SO2 emissions from Aerocom|Volcanic emissions]]
**[[Historical and Future Emissions|Historical and future emissions]]
|<!-- Chemistry -->
*[[GEOS-Chem chemistry mechanisms]]
**[[GEOS-Chem chemistry mechanisms#Stratospheric chemistry|Stratopsheric chemistry options]]
**[[GEOS-Chem chemistry mechanisms#Specialty simulations|Specialty simulations (aka "offline simulations")]]
**[[Photolysis mechanism|Photolysis mechanisms used in GEOS-Chem]]
*[[Species in GEOS-Chem]]
**[[GEOS-Chem species database]]
**[[Physical properties of GEOS-Chem species]]
**[[GEOS-Chem species units]]
**[[Species indexing in GEOS-Chem]]
*Other resources
**[[FlexChem]]
**[[Chemistry Issues]]
**[[Process Analysis Diagnostics]]
**[[Linking GEOS-Chem to CMAQ]]
**[[Coupling GEOS-Chem with RRTMG]]
**[[DSMACC chemical box model]]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Dynamics</big>
!width="500px"|<big>Deposition</big>


|-valign="top"
|-valign="top"
| <!-- Dynamics -->
|'''GEOS-Chem Steering Committee (GCSC)'''
*[[Advection scheme TPCORE]]
|[http://geos-chem.org/steering-committee.html geos-chem.org/steering-committee.html]  
*[[Boundary layer mixing]]
|A listing of current GCSC members and minutes from GCSC meetings
*[[Cloud convection]]
*[[Dynamic tropopause]]
| <!-- Deposition -->
*[[Dry deposition]]
**[[Leaf area indices in GEOS-Chem]]
**[[Olson land map]]
*[[Wet deposition]]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Aerosols</big>
!width="500px"|<big>Benchmarking and Evaluation</big>


|-valign="top"
|-valign="top"
| <!-- Aerosols -->
|'''GEOS-Chem Working Groups'''
*[[Aerosol-only simulation]]
|[http://geos-chem.org/working-groups geos-chem.org/working-groups.html]  
*[[Aerosol optical properties]]
|A listing of GEOS-Chem Working Groups and Working Group Co-Chairs
*[[Aerosol thermodynamical equilibrium]]
*[[Carbonaceous aerosols]]
*[[Mineral dust aerosols]]
*[[Secondary organic aerosols]]
*[[Sea salt aerosols]]
*[[Sulfate aerosols]]
*Aerosol Microphysics
**[[APM aerosol microphysics|APM]]
**[[TOMAS aerosol microphysics|TOMAS]]
| <!-- Benchmarks -->
*[http://acmg.seas.harvard.edu/geos/geos_benchmark.html General info about GEOS-Chem benchmark simulations]
**[http://acmg.seas.harvard.edu/geos/geos_1yr_plots.html List of GEOS-Chem 1-year benchmark simulations]
**[[Mean OH concentration]]
**[[GEOS-Chem v11-01 benchmark history]]
**[[GEOS-Chem v10-01 benchmark history]]
**[[GEOS-Chem v9-02 benchmark history]]
**[ftp://ftp.as.harvard.edu/gcgrid/geos-chem/1yr_benchmarks/ FTP site with output from 1-year GEOS-Chem benchmark simulations]
*Other resources
**[[GEOS-Chem participation in community intercomparisons]]
**[[Satellite_Specifications_Table|Satellite Instrument Specifications Table]]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Nested grid simulations</big>
!width="500px"|<big>Diagnostics</big>


|-valign="top"
|-valign="top"
| <!-- Nested grid -->
|'''GEOS-Chem Versions'''
*[[GEOS-Chem nested grid simulations]]
|[[GEOS-Chem versions]] (wiki page)
*[[Setting up GEOS-Chem nested grid simulations]]
|A listing of GEOS-Chem versions (with links for more information)
*[[Available met data for nested grid simulations]]
*[http://acmg.seas.harvard.edu/geos/wiki_docs/nested_grids/geos_data_downloads.pdf Protocol for nested-grid data downloads]
*[[Steps to setup new nested domains]]
*[[GEOS-Chem nested model publications]]
| <!-- Diagnostics -->
*[[List of diagnostics for v11-01|List of current GEOS-Chem diagnostics]]
*[[The HEMCO User's Guide#Diagnostics|Archiving diagnostics from HEMCO to netCDF files]]
*[[Diagnostic time step]]
*[[Mass Flux (ND24/25/26)]]
*[[Additional diagnostics]]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Related projects</big>
!width="500px"|<big>Other resources</big>


|-valign="top"
|-valign="top"
|<!-- Projects -->
|'''GEOS-Chem Species List'''
*[[GEOS-Chem HP]]
|[https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/species-guide.html View GEOS-Chem Species properties] (ReadTheDocs page)
*[[GEOS-Chem Adjoint]]
|A listing of the species used in the GEOS-Chem chemistry mechanisms
*[[GEOS-Chem Near-Real-Time Simulations]]
*[[FlexAOD]]
|<!-- Other resources -->
*[http://www.researcherid.com/rid/C-5595-2014 GEOS-Chem publications page on ResearcherID]
*[http://acmg.seas.harvard.edu/geos/meetings/2015/presentationsposters.html IGC8 Meeting (May 2017) web site]
*[http://acmg.seas.harvard.edu/geos/meetings/2015/presentationsposters.html Presentations from the IGC7 meeting (2015)]
*[http://acmg.seas.harvard.edu/geos/meetings/2013/index.html Presentations from the IGC6 meeting (2013)]
|}
 
<br>
 
{|border="1" width="1000px" bordercolor="#000000" cellspacing="0" cellpadding="5"
 
|-height="50" bgcolor="#00AAAA" align="center"
|colspan="2"|<p><font color="#FFFFFF" size="+2">'''Reference Section'''</font></p>
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>IDL</big>
!width="500px"|<big>GAMAP</big>


|-valign="top"
|-valign="top"
| <!-- IDL -->
|'''GEOS-Chem Guides'''
*[http://www.harrisgeospatial.com/docs/using_idl_home.html Using IDL (Harris Geospatial Solutions site)]
|[[GEOS-Chem_overview#GEOS-Chem_Guides|GEOS-Chem Guides (wiki page)]]
*[http://idlastro.gsfc.nasa.gov/idl_html_help/Structures.html Structures in IDL]
|List of several user guides explaining topics in-depth
*[http://idlastro.gsfc.nasa.gov/idl_html_help/Pointers.html Pointers in IDL]
*[http://idlastro.gsfc.nasa.gov/idl_html_help/Overview_of_Mathematics_in_IDL.html Overview of Mathematics in IDL]
*[http://idlastro.gsfc.nasa.gov/homepage.html IDL Astronomy User's Library]
*[http://fermi.jhuapl.edu/s1r/idl/idl.html JHU/APL/S1R IDL routines page]
*[http://cow.physics.wisc.edu/~craigm/idl/idl.html Craig Markwardt's IDL library]
*[[Reading binary files in IDL]]
| <!-- GAMAP -->
*[http://acmg.seas.harvard.edu/gamap/ GAMAP web page]
*[http://acmg.seas.harvard.edu/gamap/doc/ GAMAP on-line users' guide]
*[[GAMAP bugs and fixes]]
*[[GAMAP tips and tricks]]
**[[General GAMAP usage]]
**[[TVMAP cheat sheet]]
**[[File I/O with GAMAP]]
***[http://acmg.seas.harvard.edu/gamap/doc/timeseries_brief_tutorial.pdf Working with timeseries output in GAMAP]
**[[Color and graphics with GAMAP]]
***[http://acmg.seas.harvard.edu/geos/wiki_docs/gamap/gamap_color_table_file.pdf Loading Color Tables in GAMAP v2.12]
*** [http://acmg.seas.harvard.edu/forum_files/cdh_ColorInIDL.pdf Working with color in IDL by Chris Holmes]
**[[Regridding with GAMAP]]
**[[Date and time computations with GAMAP]]
**[[Text manipulation with GAMAP]]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>Fortran</big>
!width="500px"|<big>Perl</big>


|-valign="top"
|-valign="top"
|<!-- Fortran -->
|'''Requesting Support'''
*[[Intel Fortran Compiler]]
|[https://geos-chem.readthedocs.io/en/latest/help-and-reference/SUPPORT.html GEOS-Chem support guidelines]
**[http://acmg.seas.harvard.edu/geos/wiki_docs/compilers/main_for_lin_v11.pdf Version 11.1]
|ReadTheDocs page with instructions for creating GEOS-Chem support requests using the Github issue trackers
**[http://acmg.seas.harvard.edu/geos/wiki_docs/compilers/main_for_lin_v12.pdf Version 12.1]
**[https://nf.nci.org.au/facilities/software/intel-ct/13.2.146/Documentation/en_US/compiler_f/main_for/index.htm#GUID-81DC012F-20D6-46B1-A524-BFAC4B6F7747.htm#GUID-81DC012F-20D6-46B1-A524-BFAC4B6F7747 Version XE 13.1]
**[https://software.intel.com/en-us/compiler_15.0_ug_f Version 15.0]
*[[PGI Fortran compiler]]
**[http://acmg.seas.harvard.edu/geos/wiki_docs/compilers/pgiug.pdf User Guide]
**[http://acmg.seas.harvard.edu/geos/wiki_docs/compilers/pgifortref.pdf Reference Guide]
*[[GNU Fortran compiler]]
*[[GEOS-Chem basics#Fortran resources|Fortran tutorials]]
|<!-- Perl -->
*[http://www.perl.com Perl.com]
*[http://www.perl.org/books/beginning-perl/ ''Beginning Perl'' by Simon Cozens (free online book)]
*[http://backpan.perl.org/authors/id/Q/QU/QUONG/perlin20.html Perl in 20 pages]
*[http://www.enginsite.com/Library-Robert%27s-Perl-Tutorial.htm MediaWiki User's Guide]
*[http://www.cpan.org/ Comprehensive Perl Archive Network (CPAN.org)]
 
|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>R</big>
!width="500px"|<big>Python</big>


|-valign="top"
|-valign="top"
|<!-- R -->
|'''Submitting code or data'''
*[http://www.r-project.org/ The R project for statistical computing]
|[https://geos-chem.readthedocs.io/en/latest/help-and-reference/CONTRIBUTING.html GEOS-Chem contributing guidelines]
*[http://journal.r-project.org/ The R journal]
|ReadTheDocs page with instructions for submitting new source code or data updates to be included into GEOS-Chem.
*[http://www.mayin.org/ajayshah/KB/R/index.html R by example]
*[[Using R to analyze GEOS-Chem data]]
|<!-- Python -->
*[[Python code for GEOS-Chem]]
*[http://www.python.org Python.org]: Main site for all things Python
*[http://docs.python.org/2/tutorial/ Python.org Tutorial]
*[http://wiki.python.org/moin/BeginnersGuide/Programmers PythonWiki.org: List of tutorials and resources]
*[https://developers.google.com/edu/python/ Google's Python tutorial]


|-valign="top" bgcolor="#CCCCCC"
!width="500px"|<big>NCAR Command Language (NCL)</big>
!width="500px"|<big>Wiki documentation</big>
|-valign="top"
|<!-- NCL -->
*[http://www.ncl.ucar.edu/ NCL main page]
*[http://www.ncl.ucar.edu/Applications/ NCL applications]
*[http://www.ncl.ucar.edu/Document/ NCL documentation]
*[http://www.ncl.ucar.edu/Support/email_lists.shtml Sign up for NCL-Talk email list]
*[[NCL_tools_for_GEOS-Chem|NCL4GC: NCL tools for GEOS-Chem]]
|<!-- Wiki doc -->
*[[Sandbox]]
*[http://www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
*[http://meta.wikimedia.org/wiki/Help:Contents MediaWiki User's Guide]
*[http://meta.wikimedia.org/wiki/Help:Wikitext Examples of Wiki markup text]
*[http://meta.wikimedia.org/wiki/Help:Reference_card One-page editing reference card]
*[http://www.mediawiki.org/wiki/Manual:Configuration_settings Configuration Settings list]
*[http://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
|}
|}

Revision as of 17:45, 31 May 2024

GEOS&#150;Chem Wiki

GEOS-Chem Community Mission: to advance understanding of human and natural influences on the environment
through a comprehensive, state-of-the-science, readily accessible global model of atmospheric composition.

The GEOS–Chem model is a global 3-D model of atmospheric composition driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the NASA Global Modeling and Assimilation Office. It is applied by research groups around the world to a wide range of atmospheric composition problems. Central management and support of the model is provided by the Atmospheric Chemistry Modeling Group at Harvard University and by the Atmospheric Composition Analysis Group at Washington University.

GEOS-Chem overview
Past releases Current release: GEOS-Chem 14.4.0 Future releases

News

For access to all past GEOS-Chem newsletters, visit this page.

Documentation

GEOS-Chem manuals and tutorials

Read user manuals for GEOS-Chem 14 and related software.

Also see our list of software tools maintained by GEOS-Chem users.

The user manual for GEOS-Chem 13.4.1 and prior versions may be found HERE.

General information about GEOS-Chem

The table below lists where you can find general information about GEOS-Chem.

Item Link Description
GEOS-Chem website geos-chem.org Website that links to GEOS-Chem information and resources
Welcome Letter geos-chem.org/welcome.html A welcome letter for new users of GEOS-Chem
GEOS-Chem Overview GEOS-Chem overview (wiki page) A page with linking to many GEOS-Chem topics.
GEOS-Chem Narrative geos-chem.org/narrative.html A narrative descrption of GEOS-Chem that you can include in scientific papers (plus instructions for citing GEOS-Chem)
GEOS-Chem New Developments geos-chem.org/new-developments.html A list of significant GEOS-Chem updates and the developers who worked on them
GEOS-Chem Steering Committee (GCSC) geos-chem.org/steering-committee.html A listing of current GCSC members and minutes from GCSC meetings
GEOS-Chem Working Groups geos-chem.org/working-groups.html A listing of GEOS-Chem Working Groups and Working Group Co-Chairs
GEOS-Chem Versions GEOS-Chem versions (wiki page) A listing of GEOS-Chem versions (with links for more information)
GEOS-Chem Species List View GEOS-Chem Species properties (ReadTheDocs page) A listing of the species used in the GEOS-Chem chemistry mechanisms
GEOS-Chem Guides GEOS-Chem Guides (wiki page) List of several user guides explaining topics in-depth
Requesting Support GEOS-Chem support guidelines ReadTheDocs page with instructions for creating GEOS-Chem support requests using the Github issue trackers
Submitting code or data GEOS-Chem contributing guidelines ReadTheDocs page with instructions for submitting new source code or data updates to be included into GEOS-Chem.
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