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  • GEOS-Chem v10-01 benchmark history
    !Chemistry mechanism ...dates_by_Chris_Holmes_and_Geert_Vinken_.28July_2014.29|Updates to ship NOx chemistry]]
    154 KB (24,591 words) - 21:08, 20 September 2022
  • GEOS-Chem v11-02 benchmark history
    == 1-year full-chemistry benchmarks == ...-Chem_v11-02#Fix_for_organic_nitrate_chemistry|Add fix for organic nitrate chemistry]]
    158 KB (24,655 words) - 18:49, 28 May 2020
  • GEOS-Chem 12
    This version contains additional fixes for bugs and technical issues discovered after the release of 12.9.2. This version contains additional fixes for bugs and technical issues discovered during the 12.9.0 benchmarking process.
    133 KB (18,781 words) - 21:13, 21 June 2021
  • GEOS-Chem v11-01 benchmark history
    == 1-year full-chemistry benchmarks == *[[UCX chemistry mechanism]]
    166 KB (26,088 words) - 18:43, 28 May 2020
  • GEOS-Chem v11-02
    !colspan="4" bgcolor="#CCFFFF"|Features affecting the full-chemistry simulation: !colspan="4" bgcolor="#CCFFFF"|Features NOT affecting the full-chemistry simulation:
    88 KB (13,616 words) - 21:07, 20 September 2022
  • GEOS-Chem v10-01
    #Technical issues with the GEOS-Chem code or data #Other issues (i.e. problems downloading or installing the code and/or required libraries
    99 KB (15,209 words) - 20:26, 20 September 2022
  • Stratospheric chemistry
    On this page we list information about the stratospheric chemistry mechanism in GEOS-Chem. ...lementation into [[GEOS-Chem v9-01-03]] to complement the linearized ozone chemistry afforded by [[Linoz_stratospheric_ozone_chemistry|Linoz]].
    47 KB (6,806 words) - 16:46, 15 October 2019
  • GEOS-Chem v9-01-03 benchmark history
    !Stratospheric chemistry mechanism ...ospheric chemistry#Original implementation|Simple linearized stratospheric chemistry scheme]]
    82 KB (12,907 words) - 20:59, 20 June 2017
  • GEOS-Chem v9-02 benchmark history
    !Tropospheric chemistry mechanism !Tropospheric chemistry mechanism
    106 KB (16,718 words) - 19:15, 19 June 2017
  • Bugs and fixes in GEOS-Chem 12.0.0 to 12.5.0
    On this page we list the GEOS-Chem specific bugs and issues (and their fixes) that were reported in GEOS-Chem versions 12.0.0 through 1 == Issues resolved in GEOS-Chem 12.5.0 ==
    41 KB (6,194 words) - 14:22, 22 March 2021
  • GEOS-Chem v9-02
    #Technical issues with the GEOS-Chem code or data #Other issues (i.e. problems downloading or installing the code and/or required libraries
    99 KB (14,884 words) - 20:45, 20 September 2022
  • Halogen chemistry mechanism
    The gas-phase chemistry follows Sherwen et al [2016b], with updates made to the heterogenous code t ...chlorine chemistry is from UCX [Eastham et al 2014]. Tropospheric chlorine chemistry follows that described in Eastham et al [2014] and Schmidt et al [2016], wi
    21 KB (3,286 words) - 16:51, 15 July 2019
  • GEOS-Chem v11-01
    ...ernoon_P.28O3.29_and_L.28O3.29|Bug fix for archiving P(Ox)/L(Ox) from full-chemistry simulations via the ND20 diagnostic]] *Full integration of MERRA-2 in GEOS-Chem (i.e. making "full-chemistry" simulations compatible with MERRA-2) will take longer.
    95 KB (13,968 words) - 21:57, 20 December 2019
  • Bugs and fixes in GEOS-Chem v9, v10, and v11
    On this page we document bugs and technical issues that were fixed in GEOS-Chem versions v9, v10, and v11. == Issues resolved in GEOS-Chem v11-02 ==
    33 KB (5,225 words) - 20:46, 2 January 2019
  • Tropospheric chemistry mechanism
    On this page you can find information on GEOS-Chem's tropospheric chemistry mechanism (formerly referred to as "NOx-Ox-HC-aerosol-Br"). == Recent chemistry updates ==
    15 KB (2,305 words) - 20:53, 20 September 2022
  • UCX chemistry mechanism
    ...UCX combines both tropospheric and stratospheric reactions into a single chemistry mechanism. It was developed by Sebastian Eastham, Debra Weisenstein, and S ...he original UCX implementation. For more information, see our [[GEOS-Chem chemistry mechanisms]] wiki page.'''''</span>
    34 KB (5,019 words) - 15:57, 17 May 2018
  • GEOS-Chem 13.3.0
    !colspan="4" bgcolor="#CCFFFF"|Updates that will affect full-chemistry benchmark simulations |Chemistry
    150 KB (19,810 words) - 18:18, 19 February 2022
  • FAST-JX v7.0 photolysis mechanism
    ...roduced FAST-JX v7.0 into [[GEOS-Chem v10-01]] concurrently with the [[UCX chemistry mechanism]]. FAST-JX v7.0 replaces the older [[FAST-J photolysis mechanism Sebastian Eastham incorporated Fast-JX v7.0a into the [[UCX chemistry mechanism|GEOS-Chem UCX mechanism]]. From [http://www.sciencedirect.com/sci
    59 KB (8,891 words) - 18:49, 11 February 2023
  • GEOS-Chem v9-01-02 benchmark history
    ...ratosphere, '''Anthro Emiss''', Biogenic Emiss, Biomass Emiss, Photolysis, Chemistry, Diagnostics, Other (please specify): ...Stratosphere, Anthro Emiss, Biogenic Emiss, Biomass Emiss, Photolysis, '''Chemistry''', Diagnostics, Other (please specify):
    68 KB (10,687 words) - 22:14, 19 June 2017
  • GEOS-Chem versions
    *[[GEOS-Chem_14.3.0#1-year_full-chemistry_benchmarks|1-year full-chemistry benchmarks]] * Various fixes for bug and technical issues
    46 KB (5,503 words) - 16:29, 2 April 2024
  • GEOS-Chem v9-01-03
    ...CO3.2C_GLPAN_bug_in_standard_mechanism|Fix for GLCO3/GLPAN bug in standard chemistry mechanism]] |[[Acetone|Updated acetone chemistry (ocean source & sink)]]
    38 KB (5,526 words) - 15:22, 19 June 2019
  • Issues now resolved in GEOS-Chem 12
    ...2.0.0|GEOS-Chem 12.0.0]] through [[GEOS-Chem 12#12.5.0|GEOS-Chem 12.5.0]]. Issues resolved after GEOS-Chem 12.5.0 are listed as '''Closed''' on the following *[https://github.com/geoschem/geos-chem/issues GEOS-Chem issues]
    70 KB (10,330 words) - 21:56, 20 December 2019
  • GEOS-Chem 13.4.0
    !colspan="4" bgcolor="#CCFFFF"|Updates that will affect full-chemistry benchmark simulations |[https://github.com/geoschem/geos-chem/pull/1054 Migrate sulfate chemistry into KPP]
    178 KB (22,566 words) - 17:24, 26 October 2022
  • GEOS-Chem Newsletter Summer 2011
    |Co-Chair, [[Chemistry-Climate Working Group]] |Co-Chair, [[Chemistry Issues|Oxidants and Chemistry Working Group]]
    20 KB (3,001 words) - 15:15, 19 June 2019
  • GEOS-Chem 13.0.0
    !colspan="3" bgcolor="#CCFFFF"|Updates that will affect full-chemistry simulations |[https://github.com/geoschem/geos-chem/issues/447 Update to CEDS_GBD-MAPS emission inventory (1970 - 2017)], including:
    448 KB (58,579 words) - 18:10, 3 January 2023
  • GEOS-Chem v9-01-01
    |[[#Post-release patches|Several post-release patches]] to fix issues that were identified after the initial release of v9-01-01. GEOS_1x1/volcano_SO2_201010 # Global full-chemistry simulations
    36 KB (5,768 words) - 15:06, 19 June 2019
  • Bugs and fixes in GEOS-Chem v7 and v8
    On this page, we list all bugs and technical issues that were discovered and fixed prior to GEOS-Chem versions 7 and 8. Many o == Issues resolved in GEOS-Chem v8-03-02 ==
    9 KB (1,581 words) - 20:46, 2 January 2019
  • GEOS-Chem Newsletter Summer-Fall 2012
    # Updated acetone chemistry algorithm (Emily Fischer, Harvard) # Stratospheric chemistry via archived production/loss rates (Lee Murray, Harvard)
    18 KB (2,795 words) - 14:07, 19 June 2019
  • GEOS-Chem v9-01-02
    |[[#Fixes for minor issues affecting nested-grid simulations|Fixes for minor issues affecting nested-grid simulations]] |[[#Fixed minor issues in MERRA cloud convection routine|Fixed minor issues in MERRA cloud convection routine]]
    43 KB (6,754 words) - 15:22, 19 June 2019
  • GEOS-Chem Newsletter March 2011
    ...ey to the GEOS-Chem Steering Committee! They are the co-chairs of the new Chemistry-Climate Working Group. === Climate-Chemistry Working Group ===
    20 KB (3,120 words) - 16:25, 28 March 2011
  • Chemistry Working Group
    ...(photolysis, heterogeneous, deposition) are encouraged to subscribe to the chemistry email list (click on the link in the [[#Contact information|contact informa !width="300px" bgcolor="#CCCCCC"|Oxidants and Chemistry Working Group Co-Chairs
    6 KB (844 words) - 19:19, 15 April 2024
  • Caltech isoprene scheme
    <span style="color:green">'''''This page is for documentation of the isoprene chemistry mechanism (cf. Fabien Paulot) included in [[GEOS-Chem v9-02]]. This update This chemistry is largely base on Paulot et al.(2009a, ACP) for high-NOx regime and Paulot
    52 KB (7,571 words) - 15:30, 5 December 2016
  • PAN
    === Updates to Chemistry === ==== Nighttime chemistry ====
    21 KB (3,022 words) - 14:58, 25 September 2017
  • GEOS-Chem Adjoint v32
    To address these issues, subroutines ITS_A_NEW_MONTH and ITS_A_NEW_YEAR have been updated in <tt>ti ==== Update stratospheric chemistry and prod/loss rates (adj32_025) ====
    31 KB (4,615 words) - 23:07, 3 July 2013
  • GEOS-Chem v8-03-01
    # [[New isoprene scheme|Option to use Caltech isoprene chemistry]] ''(F. Paulot)'' == Previous issues now resolved in v8-03-01 ==
    28 KB (4,078 words) - 15:45, 19 June 2019
  • GEOS-Chem 12 benchmark history
    == 1-year full-chemistry benchmarks == *Correct issues when specifying [[DICE-Africa anthropogenic emissions inventory|DICE-Africa
    47 KB (6,910 words) - 19:14, 14 December 2022
  • GEOS-Chem Newsletter Fall 2011
    ...y 15, 2012 at 10:00 AM ET'''. Please set your calendars. If you have any issues that you would like the Steering Committee to address, please contact your ...r research assistant to join the GEOS-Chem Support Team in the Atmospheric Chemistry Modeling Group at Harvard (http://acmg.seas.harvard.edu and http://geos-ch
    27 KB (4,206 words) - 14:06, 19 June 2019
  • GEOS-Chem 14.1.0
    !colspan="4" bgcolor="#CCFFFF"|Updates that will affect full-chemistry benchmark simulations |Chemistry
    83 KB (11,024 words) - 16:10, 5 October 2023
  • GEOS-Chem Newsletter Spring 2013
    #[[GEOS-Chem_v9-02_benchmark_history#v9-02e|v9-02f]]: Chemistry Updates #1: #*Inorganic chemistry updates
    15 KB (2,311 words) - 15:40, 19 June 2019
  • Linoz stratospheric ozone chemistry
    On this page we list information about the Linoz stratospheric ozone chemistry mechanism. The Linoz stratospheric ozone chemistry package is a linearized chemistry mechanism for the stratosphere. It is designed to replace the older Synoz
    10 KB (1,641 words) - 18:55, 16 August 2018
  • MERRA-2 implementation details
    ==== Modifications for the full-chemistry simulations ==== ...try simulations"]] (i.e. those using the benchmark, UCX, SOA, and tropchem chemistry mechanisms) use emissions (e.g. lightning, dust) that have scale factors th
    25 KB (3,861 words) - 18:49, 28 May 2020
  • Mineral dust aerosols
    ...collection|described HERE]]) are required for photolysis and heterogeneous chemistry. The 7 MDUST types also have distinct optical properties in the FAST-JX in === Surface chemistry on dust ===
    50 KB (7,218 words) - 16:41, 16 November 2020
  • Setting up GEOS-Chem nested grid simulations
    ...ple, saving boundary condition output from a 4&deg; x 5&deg; standard full chemistry simulation will take much less time than from a 2&deg; x 2.5&deg; simulatio ...on output. These specialty simulations run much faster than then the full-chemistry simulations, and carry less species, thus resulting in more manageable file
    32 KB (4,575 words) - 19:09, 17 August 2021
  • Bromine chemistry mechanism
    ...hem v11-02d]] as part of the updated [[Halogen_chemistry_mechanism|halogen chemistry mechanism]]. ...rella added bromine chemistry as an extension to the standard model's full chemistry simulation in [[GEOS-Chem v8-03-01]]. We have now brought Justin's updates
    12 KB (2,004 words) - 09:35, 19 April 2018
  • Intel Fortran Compiler
    ...use issues. Please see [[Known_issues_caused_by_compiler_bugs|our ''Known issues caused by compiler bugs'' wiki page]] more information. ...in the output, as was [[ISORROPIA II#Optimization and.2For parallelization issues in ISORROPIA_II|seen in ISORROPIA II]].
    55 KB (8,425 words) - 17:57, 24 October 2023
  • Dry deposition
    ...globchem.dat with " MVK=DRYDEP+DRYMVK", because drydep here is done out of chemistry step. But you need to modify that for full mixing scheme, which is using c :Jaeglé, L., Shah, V.,et al., ''Nitrogen oxides emissions, chemistry, deposition, and export over the Northeast United States during the WINTER
    40 KB (5,780 words) - 14:58, 18 October 2019
  • GEOS-Chem Newsletter January-February 2011
    ...GEOS-Chem processed emissions from ship exhaust. We have corrected these issues in v9-01-01. For more information, please see: We fixed several other minor issues in GEOS-Chem v9-01-01. For a complete list, please see [[GEOS-Chem_v9-01-0
    20 KB (3,183 words) - 14:05, 19 June 2019
  • GEOS-Chem v8-02-04
    #[[Linoz stratospheric ozone chemistry|LINOZ stratospheric ozone chemistry]] ''(Dylan Jones group @ U. Toronto)'' ...w linoz code from v8-02-04 and used it in v8-02-01. I ran two GEOS-5 full chemistry simulations for 2007 and the output were consistent over the full year.
    33 KB (4,899 words) - 17:46, 15 November 2017
  • MEGAN v2.1 plus Guenther 2012 biogenic emissions
    ...arameters included for a number of compounds not presently in the standard chemistry scheme - for use in specialized simulations and/or future inclusion in sta ...are small (< 2ppb for P > 800hPa) using the standard v9-1-3 (non-Caltech) chemistry scheme.</blockquote>
    33 KB (4,994 words) - 16:44, 15 October 2019
  • GEOS-Chem v8-01-01
    # Compatibility for [[GEOS-5 issues|GEOS-5]] met fields. # Implements [[Floating point math issues|floating point error traps]] (e.g. to prevent division by zero) in a few cr
    13 KB (1,925 words) - 18:05, 20 June 2017
  • APM aerosol microphysics
    ...ticles (through condensation, coagulation, equilibrium uptake, and aqueous chemistry) are tracked. ...cs (nucleation, condensation, coagulation, deposition, and scavenging) and chemistry, it takes the model (127 tracers) 52.35 hours for the same year simulations
    29 KB (4,467 words) - 18:28, 1 November 2021
  • GEOS-Chem Newsletter February 2010
    # [[Linoz stratospheric ozone chemistry]] # [[Machine issues & portability]]
    11 KB (1,688 words) - 15:20, 19 June 2019
  • GEOS-Chem Newsletter May 2010
    # [[New isoprene scheme|Option to use Caltech isoprene chemistry]] ''(F. Paulot)'' ...h isoprene scheme]] should not be used, as there are still some unresolved issues to be worked out. We will let you know when it is ready.
    11 KB (1,703 words) - 15:44, 19 June 2019
  • ISORROPIA II
    ...sium concentrations are not considered in the present study because of the issues with dust emissions previously mentioned. All inorganic aerosols are assume == Previous issues now resolved ==
    28 KB (4,263 words) - 17:37, 14 January 2020
  • Benchmark/GEOS-Chem 12.7.0
    !colspan="2" bgcolor="#CCFFFF"|Updates that will affect full-chemistry simulations ....onlinelibrary.wiley.com/doi/full/10.1029/2018JD029046 Small alkyl nitrate chemistry]
    53 KB (7,304 words) - 17:04, 13 February 2020
  • Frequently asked questions about GEOS-Chem
    * [[Bromine chemistry mechanism|bromine chemistry?]] * [[Linoz stratospheric ozone chemistry|the Linoz stratospheric ozone chemistry scheme?]]
    5 KB (725 words) - 18:06, 20 September 2022
  • GEOS-Chem Newsletter June-July 2010
    #[[Chemistry Issues|Oxidants and Chemistry Working Group]] #[[Bromine chemistry mechanism]]
    11 KB (1,728 words) - 18:13, 8 December 2016
  • Developing GEOS-Chem
    ! Harvard University Atmospheric Chemistry Modeling Group ! ! Harvard University Atmospheric Chemistry Modeling Group !
    49 KB (7,048 words) - 19:59, 20 September 2022
  • GEOS-Chem 14.0.2
    ...formation about GEOS-Chem 14.0.2. This version contains fixes for several issues that were discovered after the release of patch version GEOS-Chem 14.0.1. The following fixes for bugs and technical issues have been added to GEOS-Chem 14.0.2. Also see the following Github pages:
    69 KB (8,991 words) - 18:34, 24 January 2023
  • GNU Fortran compiler
    ...tran</tt> compiler). In the process, we have also corrected some coding issues that were flagged by GNU Fortran. These changes will be added to the v11-0 === Fixes for technical issues in the specialty simulation modules ===
    52 KB (7,498 words) - 17:56, 24 October 2023
  • GEOS-Chem Newsletter November 2009
    * [[Chemistry Issues|Oxidants and Chemistry Working Group]] * LINOZ stratospheric ozone chemistry ''(Dylan Jones group @ U. Toronto)''
    11 KB (1,521 words) - 18:12, 8 December 2016
  • GEOS-Chem Newsletter Winter 2013
    ...Nested Model Working Group]] is performing a 1-yr [[NOx-Ox-HC-aerosol|full-chemistry simulation]] for the North American Nested Grid with GEOS-5 met (0.5&deg; x The next set of updates to [[GEOS-Chem v9-02]] shall be chemistry updates, including:
    12 KB (1,964 words) - 14:08, 19 June 2019
  • GEOS-Chem v11-01 HP Validation
    ...s section for reference. These tests helped identify and isolate remaining issues prior to running the preliminary benchmark. All results in this section use | Heterogeneous Chemistry
    17 KB (2,711 words) - 18:58, 10 May 2019
  • GEOS-Chem Newsletter Summer-Fall 2013
    #Several of the science updates (esp. the chemistry mechanism updates) also required 1-year benchmarks. This took additional t #We kept finding and fixing bugs and/or numerical issues as we were adding the science updates. On more than one occasion, we recei
    18 KB (2,894 words) - 16:50, 8 December 2016
  • GEOS-Chem Newsletter December 2010
    #[[Machine issues %26 portability|Machine issues and portability]] # [[GEOS-Chem v9-01-01#Previous issues now resolved in v9-01-01|Other minor bug fixes]]
    15 KB (2,259 words) - 18:25, 8 December 2016
  • GEOS-Chem Newsletter September 2010
    The Sources and Sinks Working Group will address issues pertaining to emissions as well as fluxes to/from the atmosphere (including #[[Chemistry Issues|Oxidants and Chemistry Working Group]]
    14 KB (2,161 words) - 18:18, 8 December 2016
  • GEOS-Chem Newsletter June 2009
    .../tt>, <tt>ratj.d</tt><br>(see [http://acmg.seas.harvard.edu/geos/wiki_docs/chemistry/chemistry_updates_v4.pdf documentation])<br>Now included in [[GEOS-Chem v8- |Members of the [[Chemistry Issues|Oxidants and Chemistry Working Group]]
    13 KB (1,989 words) - 18:12, 8 December 2016
  • DSMACC chemical box model
    To run v8-02-03 chemistry, you can just change geoschem-09-02.kpp to '''geos.kpp''', which includes a ...set which is not in the above list or is a species name as defined by the chemistry of the model the will stop (unless it starts with an X, XOH will not cause
    14 KB (2,255 words) - 15:33, 29 September 2014
  • GEOS-Chem v8-02-01
    CHEMISTRY RELEASE date May 26, 2009. #Glyoxal chemistry ''(May Fu)'' ('''''NOTE: This is an option which is turned off by default''
    15 KB (2,286 words) - 17:40, 15 November 2017
  • GEOS-Chem Newsletter September 2009
    * [[Chemistry Issues|Oxidants and Chemistry Working Group]] Mat Evans is going to set up a telecon to discuss isoprene chemistry in GEOS-Chem. The telecon will take place on September 28th, 2009 at 1200
    7 KB (1,046 words) - 18:16, 8 December 2016
  • GEOS-Chem Newsletter August 2010
    #[[Chemistry Issues|Oxidants and Chemistry Working Group]] ....seas.harvard.edu/mailman/listinfo/geos-chem-oxidants GEOS-Chem Oxidants & Chemistry]
    12 KB (1,942 words) - 18:13, 8 December 2016
  • GEOS-Chem v8-02-03
    == Previous issues now resolved in v8-02-03 == ...constant. With time, this would propagate problems through out the whole chemistry.
    23 KB (3,379 words) - 17:43, 15 November 2017
  • GEOS-Chem v8-03-02
    ...ial Mercury Model|Terrestrial]] and deep ocean mercury and updated mercury chemistry ''(N. Smith-Downey, E. Sunderland, C. Holmes)'' == Previous issues now resolved in v8-03-02 ==
    14 KB (2,236 words) - 16:02, 16 November 2017
  • GEOS-Chem Newsletter November 2010
    |[[Bromine chemistry mechanism]] |Updated stratospheric chemistry from GMI prod/loss rates
    12 KB (1,902 words) - 18:22, 8 December 2016
  • Wet deposition
    The Harvard Atmospheric Chemistry Modeling Group developed a wet deposition scheme (including scavenging of s == Previous issues that have been resolved ==
    46 KB (7,334 words) - 20:14, 2 January 2019
  • Coupling GEOS-Chem with RRTMG
    |[http://atmoschem.mit.edu/ Atmospheric Chemistry, Massachusetts Institute of Technology] *If you are using the UCX chemistry mechanism, then you will need to add an extra entry (0 or 1) at the end of
    26 KB (3,839 words) - 13:33, 8 October 2020
  • GEOS-Chem Newsletter April-May 2009
    * [[Chemistry Issues|Oxidants and Chemistry Working Group]] A couple of issues were reported after the release of v8-01-04. These will be fully corrected
    6 KB (1,013 words) - 18:23, 8 December 2016
  • GEOS-Chem Newsletter October 2010
    ...andard code. Therefore, we are not always aware of the most recent updates/issues with these simulations until someone contacts us. ::If you have questions about these simulations (other than coding or machine issues), or are looking for restart files or other data, we invite you to submit y
    13 KB (2,052 words) - 20:24, 28 May 2014
  • Olson land map
    ..., H. Liu, L. J. Mickley, and M. Schultz, ''Global modeling of tropospheric chemistry with assimilated meteorology: Model description and evaluation'', <u>J. Geo ...ob, and J.A. Logan, ''Global simulation of tropospheric O3-NOx-hydrocarbon chemistry, 1. Model formulation'', <u>J. Geophys. Res.</u>, '''103''', D9, 10,713-10,
    19 KB (2,688 words) - 20:08, 2 January 2019
  • Coupling GEOS-Chem with NCAR models
    :Several of us were at a NCAR-GEOS-Chem meeting (July 30-31, 2018) to resolve issues in the on-line coupling of GEOS-Chem with CESM2 and WRF, and to lay the bas === Known issues ===
    3 KB (428 words) - 17:21, 30 July 2020
  • GEOS-Chem v8-01-03
    == Previous issues now resolved in v8-01-03== # Chemistry
    8 KB (1,244 words) - 17:38, 15 November 2017
  • GEOS-Chem Newsletter Winter 2012
    ...take place on Wednesday, February 15th, 2012 at 10AM ET. If you have any issues you would like to bring to the attention of the Steering Committee, please ...CO3.2C_GLPAN_bug_in_standard_mechanism|Fix for GLCO3/GLPAN bug in standard chemistry mechanism]] (by Fabien Paulot). This fixes a typo in the chemical mechanis
    22 KB (3,410 words) - 18:27, 8 December 2016
  • GEOS-Chem Newsletter August 2009
    * [[Chemistry Issues|Oxidants and Chemistry Working Group]] ...s]. This is a much more accurate representation of how the GEOS-Chem full-chemistry simulation is performing than the previous plot.
    9 KB (1,496 words) - 14:15, 19 June 2019
  • Benchmark/GEOS-Chem 12.5.0
    !colspan="2" bgcolor="#CCFFFF"|Updates that will affect full-chemistry simulations ...orrections_for_CFCs_in_the_chemistry_mechanism|Corrections for CFCs in the chemistry mechanism]]
    71 KB (9,614 words) - 16:19, 26 August 2020
  • GEOS-Chem v8-01-04
    == Outstanding issues in GEOS-Chem v8-01-04 == == Previous issues now resolved in v8-01-04 ==
    23 KB (3,442 words) - 17:39, 15 November 2017
  • Leaf area indices in GEOS-Chem
    ...DIS LAI. For more details, see this [https://github.com/geoschem/geos-chem/issues/1147 GitHub issue].'''''</span> ...here is a bunch of hardcoding associated with reading the files. And a few issues associated with that:
    33 KB (5,406 words) - 21:11, 20 November 2023
  • GEOS-Chem v8-02-02
    ...airborne emissions (lightning and aircraft) are kept as reactions for the chemistry (however, their small surface contribution is moved to the PBL scheme code == Previous issues now resolved in v8-02-02 ==
    14 KB (2,160 words) - 17:42, 15 November 2017
  • GCHP v11-02
    == Issues resolved in GCHP v11-02 == ...GEOS-Chem but no values other than zero were set. OMEGA is used in sulfate chemistry and EFLUX, U, and V are all used in non-local PBL mixing.
    41 KB (6,396 words) - 18:56, 10 May 2019
  • POPs simulation
    #[[GEOS-Chem chemistry mechanisms|Simulations using KPP-built mechanisms]] :*For all species that PAHs interact with (OH, O3, OC, BC), I ran full chemistry GCAP simulations under conditions that corresponded to PAH simulations and
    15 KB (2,271 words) - 14:18, 20 September 2022
  • Linking GEOS-Chem to CMAQ
    pncglobal2cmaq is compatible with chemistry, aerosols, and SOA aerosols from GEOS-Chem v8, v9 and v10. By default, it i # [[Chemistry Issues|GEOS-Chem chemistry mechanism]]
    7 KB (1,090 words) - 14:23, 12 April 2018
  • GEOS-Chem Newsletter January 2010
    * '''Run 2''': Same as Run #2, but with Linoz strat Ox chemistry turned on === Issues with KPP ===
    9 KB (1,392 words) - 18:17, 8 December 2016
  • Methyl peroxy nitrate chemistry
    ...eroxy nitrate (MPN) chemistry as an extension to the standard model's full chemistry simulation in [[GEOS-Chem v8-02-02]]. This feature was implemented into the ....pdf this document] by Ellie Browne summarizing code modifications for MPN chemistry.
    1 KB (180 words) - 19:44, 9 February 2016
  • Flexible precision in GEOS-Chem
    ...rformance gains from using <tt>PRECISION=4</tt> are most relevant for full-chemistry applications, not for CO2 applications.</blockquote> ...t>PRECISION=4</tt> as the default option when you generate any of the full-chemistry run directories (Standard, Tropchem, UCX, SOA, SOA-SVPOA, MarinePOA, Acidup
    21 KB (3,003 words) - 15:39, 19 June 2019
  • GEOS-Chem Adjoint v31
    == Previous issues now resolved in v31 == == Outstanding issues not yet resolved in v31 ==
    5 KB (803 words) - 00:40, 7 January 2012
  • GEOS-Chem Newsletter Spring 2012
    #*Several minor bug fixes not affecting the full-chemistry simulation ''([[GEOS-Chem Support Team]], aka GCST)'' ...NASA GEOS-5/GCM. We therefore made it a priority to correct each of these issues as soon as possible.
    20 KB (3,272 words) - 18:20, 20 May 2014
  • GEOS-Chem version numbering system
    ...to the [[GEOS-Chem Support Team]]. The GCST would then be able to fix the issues for the "final" release. *Replacing the SMVGEAR chemistry solver ('''v10-01''') to [[FlexChem|FlexChem/KPP]] ('''v11-01''')
    9 KB (1,412 words) - 21:08, 1 June 2023
  • GEOS-Chem Newsletter October 2009
    * [[Chemistry Issues|Oxidants and Chemistry Working Group]] ##At present, [[Machine issues & portability#Problems with IFORT 11| the issue with the IFORT 11 compiler]
    9 KB (1,417 words) - 15:20, 19 June 2019
  • GEOS-Chem 13.1.0
    !colspan="4" bgcolor="#CCFFFF"|Updates that will affect full-chemistry simulations |[https://github.com/geoschem/HEMCO/issues/46 Distribute CEDS emissions vertically in the boundary layer]
    75 KB (9,610 words) - 22:49, 10 September 2021
  • GEOS-Chem Adjoint v33
    New stratospheric chemistry module (strat_chem_mod.f), was set to loop over the number of tracers (NSTP == Outstanding issues not yet resolved in v33 ==
    11 KB (1,672 words) - 23:06, 3 July 2013
  • QFED biomass burning emissions
    ...e aerosol chemistry simulated with an online implementation of the Goddard Chemistry, Aerosol, Radiation, and Transport model (GOCART). An example of instantane == Previous issues now resolved ==
    9 KB (1,367 words) - 19:33, 19 July 2018
  • GEOS-Chem Newsletter July 2009
    Please note that the Harvard Atmospheric Chemistry Modeling Group, GEOS-Chem, and GAMAP web pages have now moved to their new * [[Chemistry Issues|Oxidants and Chemistry Working Group]]
    7 KB (1,160 words) - 18:23, 8 December 2016
  • Benchmark/GEOS-Chem 12.4.0
    !colspan="2" bgcolor="#CCFFFF"|Features affecting the full-chemistry simulation: !colspan="2" bgcolor="#CCFFFF"|Features affecting the full-chemistry simulation:
    96 KB (13,416 words) - 13:11, 10 October 2019
  • FINNv1 biomass burning emissions
    into the issues and reprocessing the files now. You will be contacted when the next #Species currently emitted by biomass burning in standard versions for full chemistry and/or specialty simulations ''(no code changes necessary)'': CO2, CO, CH4,
    12 KB (1,925 words) - 15:18, 26 October 2018
  • GEOS-Chem Newsletter December 2009
    For more information, please see our [[Floating point math issues]] wiki page. * '''Run 2''': Same as Run #2, but with Linoz strat Ox chemistry turned on
    14 KB (2,309 words) - 15:14, 19 June 2019
  • GEOS-Chem v7-04-13
    == Previous issues now resolved in v7-04-13 == ...cies (e.g. Ox) seem to reach unphysically high values, all within a single chemistry timestep. Then the simulation dies shortly thereafter.
    6 KB (1,003 words) - 18:22, 20 June 2017
  • The NcdfUtilities package
    == Previous issues that have since been resolved == ...1-hour simulations for development and everything else in the simulation (chemistry, transport, emissions, etc.) requires just 2 minutes.
    20 KB (3,149 words) - 20:10, 22 May 2017
  • Lightning NOx emissions
    ...d up the simulation, we also recommend disabling all processes (transport, chemistry, convection, wet deposition, dry deposition) in <tt>input.geos</tt>. To av == Previous issues that are now resolved ==
    13 KB (1,787 words) - 20:53, 27 November 2018
  • GEOS-Chem Adjoint v34
    Note that the GEOS-Chem adjoint does not support Bromine chemistry yet. Applied a bug fix to avoid issues with the offline chemistry where idtnh3 is not equal to 30. [[GEOS-Chem_v9-01-03#Bug_fix_in_streets_an
    15 KB (2,094 words) - 21:27, 24 July 2013
  • GEOS-Chem Newsletter February 2009
    ...er to assess how the most up-to-date emissions inventories impact the full-chemistry simulation. ...-Chem from the Intel "IFORT" compiler version 10 to version 11. [[Machine issues & portability#Problems_with_IFORT_11|Please visit this page to view the com
    6 KB (1,049 words) - 13:14, 7 July 2009
  • GEOS-Chem 14.3.1
    !colspan="4" bgcolor="#CCFFFF"|Updates that will not affect full-chemistry benchmark simulations |Update the <tt>docs/requirements.yml</tt> to avoid security issues w/ old python versions (used to build the ReadTheDocs documentation)
    7 KB (882 words) - 16:23, 2 April 2024
  • GEOS-Chem 14.2.1
    !colspan="4" bgcolor="#CCFFFF"|Updates that will not affect full-chemistry benchmark simulations *[https://github.com/geoschem/geos-chem/issues/1855 geoschem/geos-chem #1855]
    12 KB (1,569 words) - 16:24, 2 April 2024
  • Main Page
    ...f 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/a **Contact [mailto:rebekah.horner.20@ucl.ac.uk Bex Horner] with issues or questions.
    6 KB (735 words) - 16:25, 2 April 2024
  • GEOS-Chem v8-01-02
    ...: Module <tt>upbdflx_mod.F</tt> was removed from GEOS-Chem. Stratospheric chemistry is now done in <tt>strat_chem_mod.F90</tt>.'''''</span> :The updates mainly deal with (rare) computation issues (NaN or zero concentration). The fix for ND65(family diagnostic) is probabl
    31 KB (4,189 words) - 15:54, 16 November 2017
  • Overview of GMAO met data products
    #[[GEOS-5 issues|GEOS-5 issues encountered w/r/t GEOS-Chem]] *Cloud OD’s are too low; J-values, chemistry are “too hot”
    30 KB (4,329 words) - 20:22, 20 September 2022
  • GEOS-Chem 14.0.1
    ...hem 14.0.0 benchmarking process. None of these fixes will affect the full-chemistry benchmark simulations. The following fixes for bugs and technical issues have been added to GEOS-Chem 14.0.1. Also see the following Github pages:
    3 KB (400 words) - 17:56, 1 November 2022
  • GEOS-Chem Adjoint v35
    ...ded. Please note that this a ongoing project. We've added support for full chemistry, excluding the following for the NA domain: BRAVO, CAC, Natural NH3 (GEIA) Fixed some undefined variables and some other minor issues on edgar_mod.f, inverse_mod.f, rpmares_adj_mod.f, time_mod.f, nei2008_anthr
    24 KB (3,507 words) - 16:06, 5 June 2022
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