Difference between revisions of "Main Page"

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__NOTOC__
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|<p><font color="#FFFFFF" size="+3">'''GEOS&#150;Chem Wiki'''</font></p>
<th colspan="2" height="80" valign="middle"><p><font color="#FFFFFF" size="+3">GEOS&#150;Chem Wiki</font></p></th>
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<blockquote><p align="justify">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.]</p></blockquote>
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<blockquote><p align="justify">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.</p></blockquote>
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<blockquote><p align="justify">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!</p></blockquote>
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----
<!-- ===== GENERAL INFO ABOUT GEOS-CHEM                ===== -->
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<p>&nbsp;</p>
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<table width="100%" border="1" bordercolor="#000000" cellspacing="0" cellpadding="5" align="center">
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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>
<th colspan="2" height="50" valign="middle"><p><font color="#FFFFFF" size="+2">General information about GEOS&#150;Chem</font></p></th>
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</tr>
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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 [http://acmg.seas.harvard.edu/index.html Atmospheric Chemistry Modeling Group at Harvard University] and by the [https://sites.wustl.edu/acag/ Atmospheric Composition Analysis Group at Washington University].
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Introduction and overview</big></th>
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<th width="50%"scope="col"><big>Steering Committee And Working Groups</big></th>
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</tr>
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<tr>
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{|border="1" width="925px" bordercolor="#000000" cellspacing="0" cellpadding="5"
  
<!-- Introduction & Overview: Links -->
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|colspan="3" align="center" bgcolor="#CCCCCC"|'''<font size="+2">[[GEOS-Chem overview]]</font>'''
* [[GEOS-Chem welcome letter for new users]]
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* [[Features of the GEOS-Chem public wiki]]
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|width="225px" align="center"|<font size="+2">[[GEOS-Chem versions|Past releases]]</font>
* [http://acmg.seas.harvard.edu/geos/geos_overview.html GEOS-Chem Overview]
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|width="450px" align="center" bgcolor="#CCFFFF"|<font size="+2">[[GEOS-Chem 14.0.2|'''Current release: GEOS-Chem 14.0.2''']]</font>
* [http://acmg.seas.harvard.edu/geos/geos_people.html GEOS-Chem People & Projects]
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|width="225px" align="center"|<font size="+2">[[GEOS-Chem model development_priorities|Future releases]]</font>
* [http://acmg.seas.harvard.edu/geos/word_pdf_docs/resources_guidelines_tips.pdf User Resources, Code Development Guidelines, and Debugging Tips]
+
* [[GEOS-Chem programming staff]]
+
* [[GEOS-Chem newsletters]]
+
* [http://acmg.seas.harvard.edu/geos/geos_search.html GEOS-Chem Search Engines]
+
</td>
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<td width="50%" valign="top">
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* [http://acmg.seas.harvard.edu/geos/geos_steering_cmte.html GEOS-Chem Steering Committee]
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** [[GEOS-Chem model development priorities]]
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* [http://acmg.seas.harvard.edu/geos/geos_working_groups.html GEOS-Chem Working Groups]
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** [[GEOS-Chem Adjoint|Adjoint Model and Data Assimilation Working Group]]
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** [[Aerosols_overview:_projects_and_developments|Aerosols Working Group]]
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** [[Carbon Gases and Organics Working Group]]
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** [[Emissions Working Group]]
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** [[Chemistry Issues|Oxidants and Chemistry Working Group]]
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** [[Regional Air Quality Working Group]]
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</td>
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</tr>
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== News ==
 +
*'''29 Nov 2022:''' [[GEOS-Chem 14.0.2]] is now available!
 +
*'''23 Feb 2022:''' Read the [[Media:GEOS-Chem_Newsletter_2022_Issue_2.pdf|GEOS-Chem Newsletter 2022, Issue #2]]
 +
*'''11 Dec 2020:''' A [https://scholar.google.com/citations?user=ho-sNj4AAAAJ GEOS-Chem Google Scholar page] is now available!
 +
**Click 'Follow' to be notified of new publications.
 +
**Contact [mailto:gongda.lu@ucl.ac.uk Gongda Lu] with issues or questions.
 +
*'''02 Apr 2020:''' The GEOS-Chem Youtube Channel has 100+ subscribers and a new URL: <tt>'''https://youtube.com/c/geoschem'''</tt>
 +
*'''03 Feb 2020:''' View our GEOS-Chem "dry-run" tutorial at our [http://youtube.geos-chem.org GEOS-Chem Youtube channel]
 +
*'''17 Sep 2019:''' 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
  
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For access to all past GEOS-Chem newsletters, visit [[GEOS-Chem newsletters|this page]].
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== Documentation ==
<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Getting Started With GEOS-Chem</big></th>
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<th width="50%"scope="col"><big>General Technical Information</big></th>
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</tr>
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<tr>
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=== GEOS-Chem manuals and tutorials ===
  
<!-- Getting Started With GEOS-Chem: Links -->
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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.
<td width="50%" valign="top">
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* [[Minimum system requirements for GEOS-Chem]]
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* [[GEOS-Chem supported platforms and compilers]]
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* [[Downloading GEOS-Chem source code and data]]
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* [[GEOS-Chem code development cycle]]
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* [[GEOS-Chem programming resources]] (e.g. tutorials, user guides, etc.)
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* [http://acmg.seas.harvard.edu/geos/doc/man/appendix_7.html GEOS-Chem Programming Style Guide]
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* [[Running GEOS-Chem with TESTRUN]]
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</td>
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<!-- General Technical Information: Links -->
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Also see our list of [[Software_maintained_by_GEOS-Chem_community_members|'''software tools maintained by GEOS-Chem users''']].
<td width="50%" valign="top">
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* [[Initial conditions for GEOS-Chem]]
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* [[GEOS-Chem Debugging Tips|Tips on how to debug GEOS-Chem effectively]]
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* [[Reporting GEOS-Chem bugs]]
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* [[Parallelizing GEOS-Chem]] with the OpenMP directives
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* [[Common GEOS-Chem error messages]]
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</td>
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</tr>
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The user manual for GEOS-Chem 13.4.1 and prior versions may be found '''[[Getting Started with GEOS-Chem|HERE]]'''.
</table>
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=== General information about GEOS-Chem ===
<!-- ===== CODE DEVELOPER'S FORUMS: TITLE              ===== -->
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<p>&nbsp;</p>
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<table width="100%" border="1" bordercolor="#000000" cellspacing="0" cellpadding="5" align="center">
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<tr bgcolor="#00AAAA">
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The table below lists where you can find general information about GEOS-Chem.
<th colspan="2" height="50" valign="middle"><p><font color="#FFFFFF" size="+2">GEOS&#150;Chem Code Developers' Forums</font></p></th>
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</tr>
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{| border=1 cellpadding=5 cellspacing=0
<!-- ===== CODE DEVELOPER'S FORUMS : FIRST ROW          ===== -->
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Coding</big></th>
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<th width="50%"scope="col"><big>Diagnostics</big></th>
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</tr>
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<tr>
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|-valign="top"
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!width="200px" bgcolor="#CCCCCC"|Item
 +
!width="360px" bgcolor="#CCCCCC"|Link
 +
!width="365px" bgcolor="#CCCCCC"|Description
  
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<td width="50%" valign="top">
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|'''GEOS-Chem website'''
* [[GEOS-Chem versions under development]]
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|[http://www.geos-chem.org geos-chem.org]
* [[Machine issues & portability]]
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|Website that links to GEOS-Chem information and resources
* [[Floating point math issues]]
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* [[Bugs and fixes|List of GEOS-Chem bugs and in which version they were resolved]]
+
</td>
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<!-- Diagnostics: Links -->
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|-valign="top"
<td width="50%" valign="top">
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|'''Welcome Letter'''
* [http://acmg.seas.harvard.edu/geos/doc/man/appendix_5.html Overview of diagnostics characteristics]
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|[http://geos-chem.org/geos-welcome geos-chem.org/geos-welcome]
* [[Mass Flux (ND24/25/26)]]
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|A welcome letter for new users of GEOS-Chem
* [[Additional diagnostics]]
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</td>
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</tr>
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|-valign="top"
 +
|'''GEOS-Chem Overview'''
 +
|[[GEOS-Chem overview]] (wiki page)
 +
|A page with linking to many GEOS-Chem topics.
  
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|-valign="top"
<!-- ===== CODE DEVELOPER'S FORUMS : SECOND ROW        ===== -->
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|'''GEOS-Chem Narrative'''
<!-- ======================================================== -->
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|[http://geos-chem.org/geos-chem-narrative geos-chem.org/geos-chem-narrative]
 +
|A narrative descrption of GEOS-Chem that you can include in scientific papers (plus instructions for citing GEOS-Chem)
  
<!-- Header title -->
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|-valign="top"
<tr bgcolor="#cccccc">
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|'''GEOS-Chem New Developments'''
<th width="50%"scope="col"><big>Emissions</big></th>
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|[http://geos-chem.org/geos-new-developments geos-chem.org/geos-new-developments]
<th width="50%"scope="col"><big>Chemistry</big></th>
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|A list of significant GEOS-Chem updates and the developers who worked on them
</tr>
+
  
<tr>
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|-valign="top"
 +
|'''GEOS-Chem Steering Committee (GCSC)'''
 +
|[http://geos-chem.org/geos-steering-cmte geos-chem.org/geos-steering-cmte]
 +
|A listing of current GCSC members and minutes from GCSC meetings
  
<!-- Emissions: Links -->
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|-valign="top"
<td width="50%" valign="top">
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|'''GEOS-Chem Working Groups'''
* [[Emissions overview]]
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|[http://geos-chem.org/geos-working-groups geos-chem.org/geos-working-groups]  
* [[Aircraft emissions]]
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|A listing of GEOS-Chem Working Groups and Working Group Co-Chairs
* [[Anthropogenic emissions]]
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** [http://acmg.seas.harvard.edu/geos/word_pdf_docs/emissions_v8_02_03.pdf Anthropogenic emissions in GEOS-Chem v8-02-03]
+
** [http://wiki.seas.harvard.edu/geos-chem/images/Anth_emiss_gc_v8-01-04.pdf Anthropogenic emissions in GEOS-Chem v8-01-04]
+
** [http://acmg.seas.harvard.edu/geos/word_pdf_docs/INVENTORY_GC_public-pre_v8.pdf Anthropogenic emissions prior to v8-01-01]  
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** [[Scale factors for anthropogenic emissions]]
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* [[Biofuel emissions]]
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* [[Biogenic emissions]]
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* [[Biomass burning emissions]]
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* [[Lightning NOx emissions]]
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* [[Ship emissions]]
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* [[Soil NOx emissions]]
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* [[Volcanic SO2 emissions from Aerocom|Volcanic emissions]]
+
</td>
+
  
<!-- Chemistry Links -->
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|-valign="top"
<td width="50%" valign="top">
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|'''GEOS-Chem Versions'''
* [[Chemistry Issues]]
+
|[[GEOS-Chem versions]] (wiki page)
* [[NOx-Ox-HC-aerosol|NOx-Ox-hydrocarbon-aerosol (aka "full-chemistry") simulation]]
+
|A listing of GEOS-Chem versions (with links for more information)
* Isoprene chemistry
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** [[Isoprene|List of recent papers about isoprene]]
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** [[New isoprene scheme|Updated isoprene chemistry scheme (v8-02-05)]]
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* [[Linoz stratospheric ozone chemistry]]
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* [[Photolysis mechanism]]
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* [[Dicarbonyls simulation]]
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* [[KPP solvers FAQ]]
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* [[Mercury|Mercury simulation]]
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* [[Tagged CO simulation]]
+
</tr>
+
  
<!-- ======================================================== -->
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|-valign="top"
<!-- ===== CODE DEVELOPER'S FORUMS : THIRD ROW        ===== -->
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|'''GEOS-Chem Species List'''
<!-- ======================================================== -->
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|[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
  
<!-- Header title -->
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|-valign="top"
<tr bgcolor="#cccccc">
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|'''GEOS-Chem Guides'''
<th width="50%"scope="col"><big>Dynamics</big></th>
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|[[GEOS-Chem_overview#GEOS-Chem_Guides|GEOS-Chem Guides wiki page]]
<th width="50%"scope="col"><big>Deposition</big></th>
+
|Several user guides explaining topics in-depth
</tr>
+
  
<tr>
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|-valign="top"
 +
|'''Requesting Support'''
 +
|[https://geos-chem.readthedocs.io/en/latest/reference/SUPPORT.html GEOS-Chem support guidelines]
 +
|Instructions for creating GEOS-Chem support requests using the Github issue trackers
  
<!-- Dynamics: Links -->
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|-valign="top"
<td width="50%" valign="top">
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|'''Submitting code or data'''
* [[Advection scheme TPCORE]]
+
|[https://geos-chem.readthedocs.io/en/latest/reference/CONTRIBUTING.html GEOS-Chem contributing guidelines]
* [[Boundary layer mixing]]
+
|Instructions for submitting new source code or data updates to be included into GEOS-Chem.
* [[Cloud convection]]
+
</td>
+
  
<!-- Deposition: Links -->
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|}
<td width="50%" valign="top">
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* [[Dry deposition]]
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* [[Wet deposition]]
+
</td>
+
 
+
</tr>
+
 
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<!-- ===== CODE DEVELOPER'S FORUMS : FOURTH ROW        ===== -->
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Aerosols</big></th>
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<th width="50%"scope="col"><big>Met Fields</big></th>
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</tr>
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<tr>
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<!-- Aerosols: Links -->
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<td width="50%" valign="top">
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* [[Aerosols overview: projects and developments|Aerosols working group]]
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* [[Aerosol-only simulation]]
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* [[Aerosol thermodynamical equilibrium]]
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* [[Carbonaceous aerosols]]
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* [[Mineral dust aerosols]]
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* [[Secondary organic aerosols]]
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* [[Sea salt aerosols]]
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* [[Sulfate aerosols]]
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* [[TOMAS aerosol microphysics]]
+
</td>
+
 
+
<!-- Met Fields: Links -->
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<td width="50%" valign="top">
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* [[GCAP]]
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* [[GMAO GEOS-4]]
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* GMAO GEOS-5
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** [[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]]
+
</td>
+
 
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</tr>
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<!-- ===== CODE DEVELOPER'S FORUMS : FIFTH ROW          ===== -->
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Nested Grid Simulations</big></th>
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<th width="50%"scope="col"><big>Earth System Model Framework</big></th>
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</tr>
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<tr>
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<!-- Nested Grid Simulations: Links -->
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<td width="50%" valign="top">
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* [[GEOS-Chem nested grid simulations]]
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* [[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]
+
</td>
+
 
+
<!-- Met Fields: Links -->
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<td width="50%" valign="top">
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* [[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]
+
</td>
+
 
+
</tr>
+
 
+
<!-- ======================================================== -->
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<!-- ===== CODE DEVELOPER'S FORUMS : SIXTH ROW          ===== -->
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Benchmarking and Evaluation</big></th>
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<th width="50%"scope="col"><big>Related Projects</big></th>
+
</tr>
+
 
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<tr>
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<!-- Diagnostics: Links -->
+
<td width="50%" valign="top">
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* [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 lifetime in GEOS-Chem]]
+
* [ftp://ftp.as.harvard.edu/pub/geos-chem/1yr_benchmarks/ FTP site with output from 1-year GEOS-Chem benchmark simulations]
+
</td>
+
 
+
<!-- Related Projects: Links -->
+
<td width="50%" valign="top">
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* [[GEOS-Chem column code]]
+
* [[GEOS-Chem Adjoint]]
+
* [[GEOS-Chem Near-Real-Time Simulations]]
+
</td>
+
 
+
</tr>
+
</table>
+
 
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<!-- ======================================================== -->
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<!-- ===== REFERENCE: TITLE                            ===== -->
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<!-- ======================================================== -->
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<p>&nbsp;</p>
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<table width="100%" border="1" bordercolor="#000000" cellspacing="0" cellpadding="5" align="center">
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<tr bgcolor="#00AAAA">
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<th colspan="2" height="50" valign="middle"><p><font color="#FFFFFF" size="+2">Reference Section</font></p></th>
+
</tr>
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<!-- ======================================================== -->
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<!-- ===== REFERENCE: FIRST ROW                        ===== -->
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<!-- ======================================================== -->
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>IDL</big></th>
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<th width="50%"scope="col"><big>GAMAP</big></th>
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</tr>
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<tr>
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<!-- IDL: Links -->
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<td width="50%" valign="top">
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* [http://www.ittvis.com/ ITT Visualization (vendor)]
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* [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]]
+
</td>
+
 
+
<!-- Diagnostics: Links -->
+
<td width="50%" valign="top">
+
* [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]]
+
</td>
+
 
+
</tr>
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<!-- ======================================================== -->
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<!-- ===== REFERENCE: SECOND ROW                        ===== -->
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<!-- ======================================================== -->
+
 
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<!-- Header title -->
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<tr bgcolor="#cccccc">
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<th width="50%"scope="col"><big>Fortran</big></th>
+
<th width="50%"scope="col"><big>Wiki Documentation</big></th>
+
</tr>
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+
<tr>
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+
<!-- Fortran: Links -->
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<td width="50%" valign="top">
+
* [http://www.intel.com/cd/software/products/asmo-na/eng/compilers/flin/282048.htm Intel Fortran Compiler for Linux]
+
* [http://www.pgroup.com/products/ PGI Fortran]
+
* [http://www-01.ibm.com/software/awdtools/fortran/xlfortran/ IBM XL Fortran]
+
* [http://docs.sun.com/app/docs/doc/819-3686 Sun Studio 11 Fortran Compiler]
+
* [http://www.liv.ac.uk/HPC/HTMLF90Course/HTMLF90CourseSlides.html Modular Programming w/ Fortran 90 (U. Liverpool)]
+
* [http://www.liv.ac.uk/HPC/F90page.html Other University of Liverpool F90 tutorials and courses]
+
* [http://sunsite.unc.edu/pub/languages/fortran/ User Notes on FORTRAN Programming]
+
* [http://www.nsc.liu.se/~boein/f77to90/f77to90.html Fortran 90 for the FORTRAN 77 Programmer]
+
* [http://www.kcl.ac.uk/kis/support/cc/fortran/f90home.html#1.0 Fortran 90 Home Page at King's College, London]
+
* [http://www.cs.rpi.edu/~szymansk/oof90.html Object Oriented Fortran 90 Programming]
+
</td>
+
 
+
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* [[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]
+
</td>
+
 
+
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+
</table>
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Latest revision as of 18:54, 30 November 2022

GEOS–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 14.0.2 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/geos-welcome 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/geos-chem-narrative 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/geos-new-developments A list of significant GEOS-Chem updates and the developers who worked on them
GEOS-Chem Steering Committee (GCSC) geos-chem.org/geos-steering-cmte A listing of current GCSC members and minutes from GCSC meetings
GEOS-Chem Working Groups geos-chem.org/geos-working-groups 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 Several user guides explaining topics in-depth
Requesting Support GEOS-Chem support guidelines Instructions for creating GEOS-Chem support requests using the Github issue trackers
Submitting code or data GEOS-Chem contributing guidelines Instructions for submitting new source code or data updates to be included into GEOS-Chem.