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Revision as of 15:59, 24 June 2024

GEOSChem 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

31 May 2024: GEOS-Chem 14.4.0 is now available!
02 Feb 2024: Read the GEOS-Chem Newsletter 2024, Issue #1
A GEOS-Chem Google Scholar page is now available!
- Click 'Follow' to be notified of new publications.
- Contact Bex Horner with issues or questions.
The GEOS-Chem Youtube Channel has 350+ subscribers and a new URL: https://www.youtube.com/~geoschem
NASA/GMAO is now producing GEOS chemical forecasts (GEOS-CF) using GEOS-Chem coupled to the NASA/GEOS ESM

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 GEOS-Chem in CESM wiki page for more information about running GEOS-Chem in the NCAR CESM Earth System Model.

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.

@@ Line 1: / Line 1: @@
-<big>'''GEOS-Chem Wiki'''</big>
+__NOTOC__
+{|border="1" width="925px" bordercolor="#000000" cellspacing="0" cellpadding="5"
+|-valign="middle" height="80" bgcolor="##4494cc;" align="center"
+|<p><font color="#FFFFFF" size="+3">'''GEOS&#150;Chem Wiki'''</font></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://www.as.harvard.edu 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.]
+|}
-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.
+{|border="0" width="925px" bordercolor="#FFFFFF" cellspacing="0" cellpadding="5"
-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!
+|-valign="top"
+|
-text
+----
-== Code Developers' Forums ==
+<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>
-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.
+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].
-=== Coding ===
+|}
-* [[GEOS-Chem versions under development]]
-* [[Machine issues & portability]]
-* [[Floating point math issues]]
-* [[Bugs and fixes]]
-* [[Outstanding issues yet to be resolved]]
-=== Diagnostics ===
+{|border="1" width="925px" bordercolor="#000000" cellspacing="0" cellpadding="5"
-* [http://acmg.seas.harvard.edu/geos/doc/man/appendix_5.html Overview of diagnostics characteristics]
-* [[Mass Flux (ND24/25/26)]]
-* [[Additional diagnostics]]
-=== Emissions ===
+|-valign="top"
-* [[Overview]]
+|colspan="3" align="center" bgcolor="#CCCCCC"|'''<font size="+2">[[GEOS-Chem overview]]</font>'''
-* [[Aircraft emissions]]
+|-valign="top"
-* [[Anthropogenic emissions]]
+|width="225px" align="center"|<font size="+2">[[GEOS-Chem versions|Past releases]]</font>
-** [http://acmg.seas.harvard.edu/geos/word_pdf_docs/emissions_v8_02_03.pdf Description of anthropogenic emissions inventories in GEOS-Chem v8-02-03]
+|width="450px" align="center" bgcolor="#CCFFFF"|<font size="+2">[[GEOS-Chem 14.4.0|'''Current release: GEOS-Chem 14.4.0''']]</font>
-** [http://wiki.seas.harvard.edu/geos-chem/images/Anth_emiss_gc_v8-01-04.pdf Description of anthropogenic emissions inventories in GEOS-Chem v8-01-04]
+|width="225px" align="center"|<font size="+2">[[GEOS-Chem model development_priorities|Future releases]]</font>
-** [http://acmg.seas.harvard.edu/geos/word_pdf_docs/INVENTORY_GC_public-pre_v8.pdf Table of available anthropogenic emissions inventories for use w/ GEOS-Chem (pre-v8)]
-* [[Biofuel emissions]]
-* [[Biogenic emissions]]
-* [[Biomass burning emissions]]
-* [[Lightning NOx emissions]]
-=== Chemistry ===
+|}
-* [[Chemistry Issues]]
-* [[NOx-Ox-HC-aerosol|NOx-Ox-hydrocarbon-aerosol (aka "full-chemistry") simulation]]
-* [[Photolysis mechanism]]
-* [[Mercury|Mercury simulation]]
-* [[Tagged CO simulation]]
-* [[KPP solvers FAQ]]
-* [[Isoprene]]
-=== Aerosols ===
+== News ==
-* [[Aerosols overview: projects and developments]]
+*31 May 2024: [[GEOS-Chem 14.4.0]] is now available!
-* [[Aerosol-only simulation]]
+*02 Feb 2024: Read the [https://drive.google.com/file/d/1v0cHAf6S8EMpUZNb7eVqvcRwbIAIxpRI/view?usp=sharing GEOS-Chem Newsletter 2024, Issue #1]
-* [[Aerosol thermodynamical equilibrium]]
+*A [https://scholar.google.com/citations?user=ho-sNj4AAAAJ GEOS-Chem Google Scholar page] is now available!
-* [[Secondary organic aerosols]]
+**Click 'Follow' to be notified of new publications.
-* [[Sea salt aerosols]]
+**Contact [mailto:rebekah.horner.20@ucl.ac.uk Bex Horner] with issues or questions.
-* [[Sulfate aerosols]]
+*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
-=== Met Fields ===
+For access to all past GEOS-Chem newsletters, visit [[GEOS-Chem newsletters|this page]].
-* [[GCAP]]
-* GMAO GEOS-5
-** [[List of GEOS-5 met fields]]
-** [[GEOS-5 issues]]
-** [[GEOS-5 met field reprocessing]]
-* [http://acmg.seas.harvard.edu/geos/doc/man/appendix_4.html GEOS-Chem Met Fields (from website)]
-** [[Notes regarding GEOS vertical grids]]
-=== Nested Grid Simulations ===
+== Documentation ==
-* [[GEOS-Chem nested grid simulations]]
-* [[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]
-=== Earth System Model Framework ===
+=== GEOS-Chem manuals and tutorials ===
-* [[Installing ESMF and other required libraries]]
-* [[Code development with the Earth System Model Framework]]
-* [[Automatic documentation with protex|Generating automatic LaTeX documentation with protex]]
-** [http://frodo.elon.edu/tutorial/tutorial/tutorial.html Web-based LaTeX tutorial]
-=== Related Projects ===
+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.  Also see our [[GEOS-Chem in CESM]] wiki page for more information about running GEOS-Chem in the NCAR CESM Earth System Model.
-* [[GEOS-Chem column code]]
-* [[GEOS-Chem Adjoint]]
-* [[GEOS-Chem Near-Real-Time Simulations]]
-== Data Visualization and Analysis ==
+Also see our list of [[Software_maintained_by_GEOS-Chem_community_members|'''software tools maintained by GEOS-Chem users''']].
-=== IDL ===
+The user manual for GEOS-Chem 13.4.1 and prior versions may be found '''[[Getting Started with GEOS-Chem|HERE]]'''.
-* [http://www.ittvis.com/ ITT Visualization (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)]
-* [[Reading binary files in IDL]]
-=== GAMAP ===
+=== General information about GEOS-Chem ===
-* [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]]
-**[[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]]
-== Wiki Documentation ==
+The table below lists where you can find general information about GEOS-Chem.
-* [[Sandbox]]
-* [http://www.mediawiki.org/wiki/Manual:FAQ MediaWiki FAQ]
+{| border=1 cellpadding=5 cellspacing=0
-* [http://meta.wikimedia.org/wiki/Help:Contents MediaWiki User's Guide]
-* [http://meta.wikimedia.org/wiki/Help:Wikitext Examples of Wiki markup text]
+|-valign="top"
-* [http://meta.wikimedia.org/wiki/Help:Reference_card One-page editing reference card]
+!width="200px" bgcolor="#CCCCCC"|Item
-* [http://www.mediawiki.org/wiki/Manual:Configuration_settings Configuration Settings list]
+!width="360px" bgcolor="#CCCCCC"|Link
-* [http://lists.wikimedia.org/mailman/listinfo/mediawiki-announce MediaWiki release mailing list]
+!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.
+|}