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


The [http://www.as.harvard.edu/ctm/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://www.as.harvard.edu NASA Global Modeling and Assimilation Office]. It is applied by [http://www.as.harvard.edu/ctm/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://www.as.harvard.edu/ctm/index.html Atmospheric Chemistry Modeling Group at Harvard University].
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This wiki is meant to facilitate communication between GEOS-Chem users and developers.  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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== General Information about GEOS-Chem ==
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The links below provide more information about general GEOS-Chem topics.
----


=== Introduction and Overview ===
<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>
* [http://www.as.harvard.edu/ctm/geos/geos_overview.html GEOS-Chem Overview]
* [http://www.as.harvard.edu/ctm/geos/geos_vision.html GEOS-Chem Vision]
* [http://www.as.harvard.edu/ctm/geos/geos_charter.html GEOS-Chem Management Charter]
* [http://www.as.harvard.edu/ctm/geos/geos_people GEOS-Chem People & Projects]
* [[GEOS-Chem welcome letter for new users]]
* [[GEOS-Chem programming staff]]


=== Getting Started with GEOS-Chem ===
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].
* [[Minimum system requirements for GEOS-Chem]]
* [[Downloading GEOS-Chem source code and data]]
* [[GEOS-Chem code development cycle]]
* [[GEOS-Chem programming resources]] (e.g. tutorials, user guides, etc.)
* [http://www.as.harvard.edu/chemistry/trop/geos/doc/style/ GEOS-Chem Programming Style Guide]


=== General Technical Information ===
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* [[GEOS-Chem Debugging Tips|Tips on how to debug GEOS-Chem effectively]]
* [[Reporting GEOS-Chem bugs]]
* [[Parallelizing GEOS-Chem]] with the OpenMP directives
* [[Common GEOS-Chem error messages]]


== Code Developers' Forums ==
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These pages contain more specific information about coding issues, emissions, chemistry, met fields, version history, and other aspects of GEOS-Chem. GEOS-Chem users and developers should feel free to contribute to these pages and to initiate discussion on the various topics listed here.
|-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>


=== Coding ===
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* [[GEOS-Chem versions under development]]
* [[Machine issues & portability]]
* [[Bugs and fixes]]


=== Emissions ===
== News ==
* [[Aircraft emissions]]
*31 May 2024: [[GEOS-Chem 14.4.0]] is now available!
* [[Anthropogenic emissions]]
*02 Feb 2024: Read the [https://drive.google.com/file/d/1v0cHAf6S8EMpUZNb7eVqvcRwbIAIxpRI/view?usp=sharing GEOS-Chem Newsletter 2024, Issue #1]
* [[Biofuel emissions]]
*A [https://scholar.google.com/citations?user=ho-sNj4AAAAJ GEOS-Chem Google Scholar page] is now available!
* [[Biogenic emissions]]
**Click 'Follow' to be notified of new publications.
* [[Biomass burning emissions]]
**Contact [mailto:rebekah.horner.20@ucl.ac.uk Bex Horner] with issues or questions.
* [[Lightning NOx emissions]]
*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


=== Chemistry ===
For access to all past GEOS-Chem newsletters, visit [[GEOS-Chem newsletters|this page]].
* [[NOx-Ox-HC-aerosol|NOx-Ox-hydrocarbon-aerosol (aka "full-chemistry") simulation]]
* [[Mercury|Mercury simulation]]


=== Met Fields ===
== Documentation ==
* [[GCAP]]
* [[GEOS-5]]
* [http://www.as.harvard.edu/ctm/geos/doc/man/gc_a4.html GEOS-Chem Met Fields (from website)]


=== Related Projects ===
=== GEOS-Chem manuals and tutorials ===
* [[GEOS-Chem Adjoint]]
* [http://coco.atmos.washington.edu/cgi-bin/ion-p?page=arctas.ion|GEOS-Chem Near-Real-Time Simulations]


== Resources for Data Visualization ==
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.


=== IDL ===
Also see our list of [[Software_maintained_by_GEOS-Chem_community_members|'''software tools maintained by GEOS-Chem users''']].
* [http://www.as.harvard.edu/chemistry/trop/forum_files/cdh_ColorInIDL.pdf Working with color in IDL by Chris Holmes]
* [http://www.ittvis.com/ ITT Visualziation (vendor)]
* [http://idlastro.gsfc.nasa.gov/idl_html_help/Structures.html Structures in IDL]
* [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://www.dfanning.com/ Coyote's Guide to IDL Programming (David Fanning's Web Site)] - Lots of tips on how to accomplish programming tasks
* [http://www.mpimet.mpg.de/en/misc/software/idl IDL Page at Max Planck Institute for Meteorology]
* [http://www.mpimet.mpg.de/en/misc/software/idl/doc/mgs_script.pdf Martin Schultz's IDL Tutorial (PDF Format)]
* [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]
* [http://cimss.ssec.wisc.edu/~gumley/doc/idltips.pdf The Underground Guide to IDL by Liam Gumley (PDF)]


=== GAMAP ===
The user manual for GEOS-Chem 13.4.1 and prior versions may be found '''[[Getting Started with GEOS-Chem|HERE]]'''.
* [http://www.as.harvard.edu/chemistry/trop/gamap/ GAMAP web page]
* [http://www.as.harvard.edu/chemistry/trop/gamap/documentation/ GAMAP on-line users' guide]
* [[GAMAP tips and tricks]]


== Wiki Documentation ==
=== General information about GEOS-Chem ===
* [http://www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
 
* [http://meta.wikimedia.org/wiki/Help:Contents MediaWiki User's Guide]
The table below lists where you can find general information about GEOS-Chem.
* [http://meta.wikimedia.org/wiki/Help:Wikitext Examples of Wiki markup text]
 
* [http://www.mediawiki.org/wiki/Manual:Configuration_settings Configuration Settings list]
{| border=1 cellpadding=5 cellspacing=0
* [http://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
 
|-valign="top"
!width="200px" bgcolor="#CCCCCC"|Item
!width="360px" bgcolor="#CCCCCC"|Link
!width="365px" bgcolor="#CCCCCC"|Description
 
|-valign="top"
|'''GEOS-Chem website'''
|[http://www.geos-chem.org geos-chem.org]
|Website that links to GEOS-Chem information and resources
 
|-valign="top"
|'''Welcome Letter'''
|[http://geos-chem.org/welcome.html geos-chem.org/welcome.html]
|A welcome letter for new users of GEOS-Chem
 
|-valign="top"
|'''GEOS-Chem Overview'''
|[[GEOS-Chem overview]] (wiki page)
|A page with linking to many GEOS-Chem topics.
 
|-valign="top"
|'''GEOS-Chem Narrative'''
|[http://geos-chem.org/narrative.html geos-chem.org/narrative.html]
|A narrative descrption of GEOS-Chem that you can include in scientific papers (plus instructions for citing GEOS-Chem)
 
|-valign="top"
|'''GEOS-Chem New Developments'''
|[http://geos-chem.org/new-developments.html geos-chem.org/new-developments.html]
|A list of significant GEOS-Chem updates and the developers who worked on them
 
|-valign="top"
|'''GEOS-Chem Steering Committee (GCSC)'''
|[http://geos-chem.org/steering-committee.html geos-chem.org/steering-committee.html]
|A listing of current GCSC members and minutes from GCSC meetings
 
|-valign="top"
|'''GEOS-Chem Working Groups'''
|[http://geos-chem.org/working-groups geos-chem.org/working-groups.html]
|A listing of GEOS-Chem Working Groups and Working Group Co-Chairs
 
|-valign="top"
|'''GEOS-Chem Versions'''
|[[GEOS-Chem versions]] (wiki page)
|A listing of GEOS-Chem versions (with links for more information)
 
|-valign="top"
|'''GEOS-Chem Species List'''
|[https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/species-guide.html View GEOS-Chem Species properties] (ReadTheDocs page)
|A listing of the species used in the GEOS-Chem chemistry mechanisms
 
|-valign="top"
|'''GEOS-Chem Guides'''
|[[GEOS-Chem_overview#GEOS-Chem_Guides|GEOS-Chem Guides (wiki page)]]
|List of several user guides explaining topics in-depth
 
|-valign="top"
|'''Requesting Support'''
|[https://geos-chem.readthedocs.io/en/latest/help-and-reference/SUPPORT.html GEOS-Chem support guidelines]
|ReadTheDocs page with instructions for creating GEOS-Chem support requests using the Github issue trackers
 
|-valign="top"
|'''Submitting code or data'''
|[https://geos-chem.readthedocs.io/en/latest/help-and-reference/CONTRIBUTING.html GEOS-Chem contributing guidelines]
|ReadTheDocs page with instructions for submitting new source code or data updates to be included into GEOS-Chem.
 
|}

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.