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• GEOS-Chem v11-02 benchmark history
  ...ata produced 20X too much NH3 emissions as expected. We believe that this is likely attributed to an regridding error during the preparation of the orig ...verted to using the 1° x 1° GEIA natural NH3 emissions data, which is benchmarked with [[#v11-02f-Run1|v11-02f-Run1]]. We have also de-listed the
  158 KB (24,655 words) - 18:49, 28 May 2020
• GEOS-Chem v9-01-02 benchmark history
  ...the TAO (Toronto Atmospheric Observatory) measurements, but now the model is way too low, with a very weak seasonal cycle. Replacing the emissions would ...ethane is fairly consistently degraded with the lower emissions, the same is not the case for propane where on balance there seems an improvement.
  68 KB (10,687 words) - 22:14, 19 June 2017
• GEOS-Chem v8-01-02
  ...tt>upbdflx_mod.F</tt> was removed from GEOS-Chem. Stratospheric chemistry is now done in <tt>strat_chem_mod.F90</tt>.'''''</span> ...ugging approach which you have suggested and it indicates that the problem is coming from the triple loop:
  31 KB (4,189 words) - 15:54, 16 November 2017
• Dry deposition
  Here is a description of the GEOS-Chem dry deposition scheme from several journal a <blockquote>Dry deposition of oxidants and water soluble species is computed using a resistance-in-series model based on the original formulati
  40 KB (5,780 words) - 14:58, 18 October 2019
• GEOS-Chem Newsletter Fall 2011
  ...efore combined several news items into a Fall 2011 newsletter. This issue is also the offical notification of the release of [[GEOS-Chem v9-01-02]]. ...eas.harvard.edugeos/geos_working_groups.html GEOS-Chem Working Group] that is most relevant to your research. You can also sign up for the relevant [[Su
  27 KB (4,206 words) - 14:06, 19 June 2019
• GEOS-Chem v9-02 benchmark history
  Here is the assessment form for 1-month benchmark simulation '''v9-02r with GEOS-FP #*The v9-02r GEOS-FP benchmark (July 2013 met) uses GFED year 2011, which is the last available GFED3 year.
  106 KB (16,718 words) - 19:15, 19 June 2017
• GEOS-Chem v9-01-01
  ...ts 2006 contains biofuels and not Streets 2000. So in biofuel_mod.f, there is to change the following lines to avoid double counting biofuel emissions ov ! If we are over SE ASIA and are using Streets 2006 (that is
  36 KB (5,768 words) - 15:06, 19 June 2019
• ISORROPIA II
  ...nce formation of sulfate-nitrate-ammonium on coarse mode sea salt and dust is excluded. Submicrometer-sized particles are likely to reach gas-aerosol equ ...e humidities reach high values on a daily basis, the metastable assumption is acceptable.</blockquote>
  28 KB (4,263 words) - 17:37, 14 January 2020
• File I/O with GAMAP
  ...="color:red"><big><strong>[https://geoschem.github.io/gamap-manual/ GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an Routine <tt>CTM_GET_DATA</tt> is the main GAMAP data reader. It is called by the top-level <tt>GAMAP</tt> routine every time you read a file f
  41 KB (6,157 words) - 14:19, 19 July 2023
• Date and time computations with GAMAP
  ...="color:red"><big><strong>[https://geoschem.github.io/gamap-manual/ GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an ...a year. For example, the Julian Day number of 2008/01/10 is 10 (since it is the 10th day of 2008).
  13 KB (1,907 words) - 14:20, 19 July 2023
• GEOS-FP data processing software
  # <tt>GEOS.fp.asm</tt>, which indicates that the data is the GEOS-FP assimilated met product #the <tt>.nc4</tt> suffix which indicates that each file is stored in the netCDF-4 data format
  39 KB (6,282 words) - 11:36, 9 October 2018
• Leaf area indices in GEOS-Chem
  ...w of how leaf area index (LAI) data is used in GEOS-Chem. Leaf area index is defined as the total leaf surface area divided by the total surface area of <span style="color:red">'''''There is an issue under investigation with v6 of the Yuan processed MODIS LAI. For m
  33 KB (5,406 words) - 21:11, 20 November 2023
• Passing array arguments efficiently in GEOS-Chem
  ...hem, we pass arrays as arguments from one routine to another. But if this is not done properly, it can cause GEOS-Chem to use an excessive amount of mem This very technical description of how Fortran passes arrays to subroutines is taken from the [http://acmg.seas.harvard.edu/geos/wiki_docs/compilers/main_
  41 KB (5,296 words) - 20:26, 3 January 2017
• MEGAN v2.1 plus Guenther 2012 biogenic emissions
  ...i-model-dev.net/5/1471/2012/gmd-5-1471-2012.html (Article)] The net result is a 11-12% decrease in the global flux for isoprene, and a 30% increase in th ...ndard fullchem. Another under-the-hood change is that the PCEEA/PECCA flag is no longer needed since we use this scheme exclusively now.</blockquote>
  33 KB (4,994 words) - 16:44, 15 October 2019
• GNU Fortran compiler
  '''''The GNU Fortran compiler is our recommended open-source compiler for GEOS-Chem.''''' ...rimented using different versions of GNU Fortran to build GEOS-Chem. Here is the compatibility matrix of GEOS-Chem versions vs. supported GNU Fortran co
  52 KB (7,498 words) - 17:56, 24 October 2023
• GEOS-Chem v9-01-03 benchmark history
  Here is the assessment form for 1-month benchmark simulation '''v9-01-03-Fix_for_IF Here is the assessment form for 1-month benchmark simulation '''v9-01-03r'''.
  82 KB (12,907 words) - 20:59, 20 June 2017
• Coupling GEOS-Chem with RRTMG
  ...e is invoked. However, these cause negligible slow down (the default model is actually slightly faster than the standard v9-01-03). Compiling with RRTMG= ...0 April 2015 and a 1-year benchmark simulation approved on 01 May 2015. It is included in the [[GEOS-Chem v10-01]] public release.
  26 KB (3,839 words) - 13:33, 8 October 2020
• GEOS-Chem v8-02-03
  ...problem we were having with [[KPP solvers FAQ|KPP]] in GEOS-Chem v8-02-03 is now solved. We've posted patched files on the FTP site: :The problem is that, somehow, KPP considers 3 species declared as "dead" in <tt>globchem.d
  23 KB (3,379 words) - 17:43, 15 November 2017
• GEOS-Chem Newsletter December 2009
  Here is your December 2009 GEOS-Chem Newsletter. We would like to take this opport We encourage each GEOS-Chem user to join the Working Group that is most relevant to his/her area of research.
  14 KB (2,309 words) - 15:14, 19 June 2019
• PAN
  ...need to decide how this fits in with the nighttime isoprene chemistry that is currently under development. ...in this simulation. Hydroxyacetone has a 1-2 day lifetime. Methylglyoxal is treated as a tracer so that it can be emitted from biomass burning plumes a
  21 KB (3,022 words) - 14:58, 25 September 2017
• Centralized chemistry time step
  ...mal configuration|Our most recent recommendation (cf. Philip et al 2016)]] is:''' ...the center of the "chemistry" timestep. The state of the atmosphere that is used to initialize the "chemistry" should therefore be close to the center
  25 KB (3,278 words) - 20:30, 2 January 2019
• General GAMAP usage
  ...="color:red"><big><strong>[https://geoschem.github.io/gamap-manual/ GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an ; This token is different depending on which OS you are using.
  19 KB (3,012 words) - 14:19, 19 July 2023
• Automatic documentation with protex
  ...hem. It is contained in the doc/ folder of the GEOS-Chem source code, and is invoked when you type <tt>make doc</tt>. Therefore, you only have to downl Protex is a very useful Perl script that can strip information from a standard Fortra
  20 KB (2,871 words) - 21:59, 11 January 2019
• GEOS-Chem v8-02-04
  :I think that it is safe to release [Linoz in v8-02-04]. However, we should acknowledge that i ...roduct with the new MEGAN biogenic emissions. The older AVHRR LAI product is [http://acmg.seas.harvard.edu/geos/wiki_docs/benchmarks/MODIS_LAI_vs_AVHRR_
  33 KB (4,899 words) - 17:46, 15 November 2017
• Linoz stratospheric ozone chemistry
  ...stry package is a linearized chemistry mechanism for the stratosphere. It is designed to replace the older Synoz algorithm, which was a flux-based bound It is recommended to use the Linoz option in your GEOS-Chem simulations.
  10 KB (1,641 words) - 18:55, 16 August 2018
• Profiling GEOS-Chem
  ...you to examine how much time is spent in a given GEOS-Chem routine. This is helpful in identifying potential bottlenecks caused by sub-optimally writte ...s://sourceware.org/binutils/docs/gprof/ The GNU profiler (<tt>gprof</tt>)] is a free, open source software package that you can use to determine which GE
  16 KB (2,242 words) - 14:12, 10 June 2019
• APM aerosol microphysics
  ...scribes the APM (Advanced Particle Microphysics) option in GEOS-Chem. APM is one of two microphysics packages being incorporated into GEOS-Chem, the oth ...and equilibrium uptake of nitrate, ammonium, and secondary organic aerosol is explicitly simulated, along with the scavenging of secondary particles by p
  29 KB (4,467 words) - 18:28, 1 November 2021
• GEOS-Chem Newsletter Summer-Fall 2012
  == GEOS-Chem v9-01-03 is now released! == ...on, then the new grid-independent code is invoked; otherwise the new code is not compiled into the executable.
  18 KB (2,795 words) - 14:07, 19 June 2019
• GEOS-Chem v8-03-01
  ...radiative environment for the beginning of the chemistry time step. This is wrong and produces a small but systematic bias. It should be calculated for ...nith angle (aka SUNCOS) at the midpoint of the chemistry timestep. SUNCOS is then fed to FAST-J, so that it computes the photolysis also at the midpoint
  28 KB (4,078 words) - 15:45, 19 June 2019
• GEOS-FP
  GEOS FP ("forward processing") is the current operational met data product from [http://gmao.gsfc.nasa.gov NA #GEOS-FP data is generated using a model which changes frequently and data are not retroacti
  27 KB (3,988 words) - 18:38, 28 May 2020
• Overview of GMAO met data products
  The following table is a quick summary of the GMAO meteorological data products that have been use |Is this data still being produced?
  30 KB (4,329 words) - 20:22, 20 September 2022
• GEOS-Chem v9-01-02
  .../tt> will be removed (along with the other SMVGEAR routines) once FlexChem is implemented into GEOS-Chem.'''''</span> ...ave corrected this error by first making sure that each <tt>IL*</tt> index is nonzero before doing the corresponding <tt>IF ( J = ... )</tt> test:
  43 KB (6,754 words) - 15:22, 19 June 2019
• Mass Flux (ND24/25/26)
  ...s flux from level 1 to level 2 and ND26(:,:,LLPAR) is all zeros). This fix is added into [[GEOS-Chem v11-02#v11-02b|v11-02b]]. ...planation below is intended for GEOS-Chem versions 8-01-03 and newer, that is the versions with the updated advection.
  8 KB (1,375 words) - 20:22, 2 January 2019
• TOMAS setup guide
  There is an instance of the compiler installed on glooscap, which you can load by do '''geos-chem-libraries-intel11''' is a bundle of software required to build and run the latest version of GEOS-C
  14 KB (2,171 words) - 15:18, 19 June 2019
• Sulfate aerosols
  ...al Panel on Climate Change (hereinafter IPCC) [2001]. Anthropogenic sulfur is emitted as SO2 except for a small fraction as sulfate (5% in Europe and 3% ...y averages from ''Kettle et al.'' [1999], and the transfer velocity of DMS is computed using an empirical formula from ''Liss and Merlivat'' [1986] as a
  17 KB (2,587 words) - 20:10, 19 September 2022
• Boundary layer mixing
  #TURBDAY (''Dale Allen, U. Maryland''): Full PBL mixing. This is contained in source code file <tt>pbl_mix_mod.f</tt>. ...F (''Jintai Lin and Michael McElroy''): Non-local PBL mixing scheme. This is contained in the source code files <tt>vdiff_pre_mod.f</tt> and <tt>vdiff_m
  8 KB (1,241 words) - 20:42, 13 July 2023
• GEOS-Chem v9-01-03
  :Everything is fine if LD24 = LLPAR but it seems to go wrong if you try to output a subset SCALEX = SCALE_A1 ! MERRA SLP is hourly
  38 KB (5,526 words) - 15:22, 19 June 2019
• GEOS-Chem nested grid simulations
  ===What is involved in running a nested grid simulation?=== === Is it possible to run nested GEOS-Chem simulations on the AWS cloud? ===
  11 KB (1,499 words) - 19:04, 13 July 2020
• Updating standard chemistry with JPL 10-6
  This page is intended to incorporate the latest version of [http://jpldataeval.jpl.nasa. ...ature sensitivity value, E/R, is entered following JPL format, so the sign is opposite of the GEOS-Chem format. The updates will be tested in the benchm
  34 KB (5,418 words) - 18:21, 9 March 2016
• MERRA-2
  ...deg; lat x 0.625&deg; lon x 72 hybrid sigma/pressure levels. MERRA-2 data is stored on the same vertical grid as the [[GEOS-FP|GEOS-5 "forward processin ...data, except that the native resolution of the archived MERRA-2 data files is now 0.5&deg; x 0.625&deg;.'''''</span>
  25 KB (3,634 words) - 18:47, 28 May 2020
• GEOS-Chem Newsletter March 2010
  Here is your March 2010 Newsletter. We encourage each GEOS-Chem user to join the Working Group that is most relevant to his/her area of research.
  13 KB (2,023 words) - 22:47, 6 December 2016
• GEOS-Chem Newsletter Winter 2012
  The next telecon is scheduled for May-June 2012, date TBD. Here is a summary of [[GEOS-Chem Support Team]] activities:
  22 KB (3,410 words) - 18:27, 8 December 2016
• Tropospheric chemistry mechanism
  ...determined by emissions and transport (and therefore not a tracer). If so, is there a way to easily visualize or extract these input concentrations? :Yes, in the full chemistry mechanism, CH4 is a constant. The values for years and latitude bands are set by routine <co
  15 KB (2,305 words) - 20:53, 20 September 2022
• GEOS-Chem vertical grids
  *Surface upwards (in GEOS-Chem "Classic"); L=1 is the surface *Surface upwards (in met field files read in by GEOS-Chem); L=1 is the surface
  34 KB (3,049 words) - 15:03, 19 June 2019
• Flexible precision in GEOS-Chem
  ...n 8-byte integer by compiling with <tt>-i8</tt>. In most circumstances it is OK to use 4-byte integers, unless you need to point to a memory location or ...term <tt>DOUBLE PRECISION</tt>. This is the same as <tt>REAL*8</tt> -- it is an 8-byte floating point.
  21 KB (3,003 words) - 15:39, 19 June 2019
• Color and graphics with GAMAP
  ...="color:red"><big><strong>[https://geoschem.github.io/gamap-manual/ GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an A good primer for creating and manipulating IDL color tables is: [http://acmg.seas.harvard.edu/forum_files/cdh_ColorInIDL.pdf ''Working wi
  10 KB (1,773 words) - 14:20, 19 July 2023
• FlexAOD
  ...GEOS-Chem Meeting]! A quick comparison with online GEOS-Chem calculations is given in [http://pumpkin.aquila.infn.it/flexaod/download/FlexAODv1.4.pdf th This will create the subdirectory "<tt>flexaod_vX.Y</tt>", here is a quick look at the content:
  22 KB (3,327 words) - 20:58, 20 September 2022
• GEOS-Chem v11-01 HP Validation
  ...ault GCHP run directory settings. For all simulations, the following setup is used: The GCHP simulation is performed with the following computational environment and model setup:
  17 KB (2,711 words) - 18:58, 10 May 2019
• GAMAP bugs and fixes
  ...or:red"><big><strong>[https://geoschem.github.io/gamap-manual/GAMAP GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an ...es</tt>, and this value is then assigned to the <tt>dim</tt> array (which is an INT array; max value 32767).
  16 KB (2,641 words) - 19:09, 16 September 2022
• GEOS-Chem Newsletter June-July 2010
  ...ctober 5, or October 12). We will announce the meeting date as soon as it is established. ...ning of the GEOS–Chem community and faster sharing of new model features is promoted by users offering co-authorship for recent developments.
  11 KB (1,728 words) - 18:13, 8 December 2016
• GEOS-Chem 12
  ...chem/issues/372 Fix run-time error when optional Luo wet deposition scheme is turned on] ...Skip reading FLASH_DENS and CONV_DEPTH fields when lightning NOx extension is turned off]
  133 KB (18,781 words) - 21:13, 21 June 2021
• GEOS-Chem v8-01-04
  # v8-01-01 Run0 vs. v8-01-01 Run1 is a clean comparison for the switch from ISORROPIA to RPMARES. .../cm3 in simulations that he had performed. '''''Therefore the "quick fix" is probably the major factor driving the drop in mean OH in the v8-01-04 runs.
  23 KB (3,442 words) - 17:39, 15 November 2017
• GEOS-Chem Newsletter October 2009
  Here is your October 2009 GEOS-Chem Newsletter! Happy autumn to one and all! ...://acmg.seas.harvard.edu/geos/geos_working_groups.html Working Group] that is most relevant to his/her area of research. For more information about a pa
  9 KB (1,417 words) - 15:20, 19 June 2019
• GEOS-FP implementation details
  ...nt [http://gmao.gsfc.nasa.gov NASA/GMAO] operational met data product. It is produced with a native resolution of 0.25&deg; (lon) x 0.3125&deg; (lat) x ...imilation System (aka GEOS-DAS). This means that the "5.7.x" nomenclature is no longer correct. For this reason, we shall refer to this product as GEOS
  34 KB (5,204 words) - 14:15, 15 May 2017
• QFED biomass burning emissions
  ...style="color:red">'''''NOTE: The QFED biomass burning emissions inventory is available for simulations with [[GEOS-Chem v10-01]] and higher versions via ...degrees. Generally, the QFED data stored in the [[HEMCO data directories]] is the improved 0.1x0.1 product. Occasionally the 0.25x0.3125 product may be s
  9 KB (1,367 words) - 19:33, 19 July 2018
• Text manipulation with GAMAP
  ...e="color:red"><big><strong>[https://geoschem.github.io/gamap-manual GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an ...tring of text characters is equivalent to an array of byte values. A byte is a collection of 8 bits and may express values from 0-255. The [http://www.
  14 KB (2,292 words) - 14:20, 19 July 2023
• TVMAP cheat sheet
  ...or:red"><big><strong>[https://geoschem.github.io/gamap-manual/GAMAP GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an This is the same as (showing the implicit lon/lat range associated with the data):
  13 KB (1,949 words) - 19:08, 16 September 2022
• GEOS-Chem Newsletter May 2010
  Here is your May 2010 Newsletter...just in time for the Memorial Day Weekend! ...ning of the GEOS–Chem community and faster sharing of new model features is promoted by users offering co-authorship for recent developments.
  11 KB (1,703 words) - 15:44, 19 June 2019
• Setting up GEOS-Chem nested grid simulations
  <span style="color:red">'''''Some of this information is out of date. We are in the process of updating the GEOS-Chem Classic user m There is no "preferred" resolution for generating boundary conditions. More often t
  32 KB (4,575 words) - 19:09, 17 August 2021
• GEOS-Chem Newsletter August 2010
  Here is your August 2010 GEOS-Chem Newsletter...just in time for the dog days of su ...ning of the GEOS–Chem community and faster sharing of new model features is promoted by users offering co-authorship for recent developments.
  12 KB (1,942 words) - 18:13, 8 December 2016
• GEOS-Chem Newsletter Summer-Fall 2013
  [[GEOS-Chem v9-02]] is our development version. It contains several important scientific updates ...e an error is discovered. Then we have to send out a bug fix patch, which is a inconvenience. Furthermore, some code submissions that we receive have on
  18 KB (2,894 words) - 16:50, 8 December 2016
• The NcdfUtilities package
  ...ou can use to write data to and read data from netCDF files. This package is contained within GEOS-Chem (in the <tt>NcdfUtil/</tt> folder, but may also The NcdfUtilities code is used by GEOS-Chem "Classic" simulations to perform netCDF file I/O. The so
  20 KB (3,149 words) - 20:10, 22 May 2017
• Advection scheme TPCORE
  ...RE v7.1: This version is used with the GEOS-3 met fields. The source code is contained in F90 module <tt>tpcore_mod.f</tt>. ...he GEOS-4 and GEOS-5 met fields and for GCAP simulations. The source code is contained in the F90 module <tt>tpcore_fvdas_mod.f90</tt>. This version of
  12 KB (1,903 words) - 20:00, 2 January 2019
• Halogen chemistry mechanism
  Stratospheric chlorine chemistry is from UCX [Eastham et al 2014]. Tropospheric chlorine chemistry follows that ...ICl and IBr, instead of I2 as in Sherwen et al [2016a]. Another key change is that the sea-surface iodide now uses the value predicted by the relationshi
  21 KB (3,286 words) - 16:51, 15 July 2019
• GEOS-Chem Newsletter February 2010
  Here is your February 2010 Newsletter. We encourage each GEOS-Chem user to join the Working Group that is most relevant to his/her area of research.
  11 KB (1,688 words) - 15:20, 19 June 2019
• GEOS-Chem Newsletter September 2010
  Here is your September GEOS-Chem Newsletter. The next GEOS-Chem Steering Committee date is TBD (possibly January 4th). We will confirm the date shortly.
  14 KB (2,161 words) - 18:18, 8 December 2016
• GEOS-Chem Newsletter January-February 2011
  '''''NOTE: Registration is now closed.''''' '''Matthew Cooper''', who is working with Randall Martin at Dalhousie University, will join the GEOS-Che
  20 KB (3,183 words) - 14:05, 19 June 2019
• Sea salt aerosols
  The original reference document for the GEOS-Chem sea salt simulation is [http://acmg.seas.harvard.edu/publications/2005/alexander2005.pdf ''Alexand :Here is a summary of the changes:
  22 KB (3,255 words) - 19:56, 2 January 2019
• GFAS biomass burning emissions
  ...style="color:red">'''''NOTE: The GFAS biomass burning emissions inventory is available for simulations with [[GEOS-Chem 12#12.2.0|GEOS-Chem 12.2.0]] and ...files are produced at a global. 0.1x0.1 resolution. A full list of fields is given in the File Contents section.
  16 KB (2,611 words) - 19:52, 1 April 2019
• POPs simulation
  <span style="color:red"><big><strong>The POPs simulation is currently stale in [[GEOS-Chem 13.0.0]] and later versions. We look to the ...d approved on 14 Sept 2015. Additional benchmarking of the POPs simulation is in progress.'''''</span>
  15 KB (2,271 words) - 14:18, 20 September 2022
• TOMAS aerosol microphysics
  ...page describes the TOMAS aerosol microphysics option in GEOS-Chem. TOMAS is one of two aerosol microphysics packages being incorporated into GEOS-Chem, ...resolution are sulfate, sea-salt, OC, EC, and dust. An advantage of TOMAS is the full size resolution for all chemical species and the conservation of a
  18 KB (2,561 words) - 20:18, 22 September 2022
• GEOS-Chem version numbering system
  ...his more clearly shows the progression of version numbers. Note that this is the opposite of how versions are displayed in the Git history.'' While this versioning system worked well, it is not in line with accepted software industry best practice. Also the change
  9 KB (1,412 words) - 21:08, 1 June 2023
• Regridding in GEOS-Chem
  ..., and divide by the area on the output grid, such that the total quantity is preserved. ...at each grid cell but the mass will be smaller for each grid cell. So mass is an extensive variable and the others are intensives.
  6 KB (1,114 words) - 21:27, 13 July 2023
• Tagged CO simulation
  ...ous full-chemistry simulation (more on that below). Because the simulation is linear, CO can be “tagged” by its source region/type. The regions and t ...d by 19% and biomass burning emissions are scaled by 11%. More information is given in Duncan et al. (2007). See note below!<br><br>
  13 KB (1,970 words) - 17:33, 24 October 2023
• GEOS-Chem Newsletter Summer 2011
  #<p>Once the developer is satisfied, GEOS–Chem Model Scientist Daniel Jacob will quickly review the ...EDT aircraft emissions update (submitted by Steven Barrett et al from MIT) is technically ready to be added into the standard code. However, the FAA has
  20 KB (3,001 words) - 15:15, 19 June 2019
• GEOS-Chem v8-02-02
  ...dary Layer scheme] for GEOS-5 only, developed by Jintai Lin.<br>Note: This is an option in <tt>input.geos</tt> ...as reactions for the chemistry (however, their small surface contribution is moved to the PBL scheme code as other emissions). These changes are necessa
  14 KB (2,160 words) - 17:42, 15 November 2017
• GEOS-Chem Newsletter June 2009
  Here is the June 2009 GEOS-Chem Newsletter. Happy Summer Solstice! |Validation is ongoing
  13 KB (1,989 words) - 18:12, 8 December 2016
• Linking GEOS-Chem to CMAQ
  ...al Interpolation - Since most regional models use a curvilinear grid, this is the simplest step. ...olation - Many regional models use a pure sigma-pressure coordinate, which is different from GEOS-Chem's hybrid eta-sigma.
  7 KB (1,090 words) - 14:23, 12 April 2018
• GEOS-Chem Newsletter March 2009
  A belated Happy St. Patrick's Day to one and all! Here is the March 2009 edition of the GEOS-Chem newsletter. ...n at the same time. This will allow us to serve you better. If one of us is unavailable then the others will be able to respond to you.
  8 KB (1,338 words) - 15:19, 19 June 2019
• FlexGrid
  FlexGrid is a new functionality that will allow users to define the grid for their GEOS ### not contain emissions data. The extension number is set to wildcard
  21 KB (2,963 words) - 05:45, 8 October 2023
• GEOS-Chem Adjoint
  ...with the latest release of GEOS-Chem, v8-02-01. This merged adjoint model is now the standard adjoint code into which all further development efforts wi The forward model on which the adjoint is based originally corresponded to GEOS-Chem v8-02-01. It was subsequently up
  54 KB (8,455 words) - 16:52, 29 February 2024
• GEOS-Chem v8-02-01
  #Glyoxal chemistry ''(May Fu)'' ('''''NOTE: This is an option which is turned off by default''''') # v8-01-04 Run2 vs. v8-01-04 Run1 is a clean comparison between the GEOS-5.0.1 and GEOS-5.1.0 met products.
  15 KB (2,286 words) - 17:40, 15 November 2017
• Creating run directories for GEOS-Chem 12.9.3 and prior
  ...ou can edit the <tt>CopyRunDirs.input</tt> file so that the following line is uncommented under <tt>RUNS</tt>: ...s. This script uses an input file named <tt>CopyRunDirs.input</tt>, which is also located in the <tt>perl</tt> directory.
  16 KB (2,212 words) - 21:31, 8 December 2020
• GEOS-Chem Adjoint v35
  Support for GEOS FP meteorology has been added. Nested support is on the way and will be supported very soon. ...l NH3 (GEIA) and Volcano SO2 emissions are not yet supported. Offline CH4 is supported. Tagged CO requires revision of archived OH and O3 production an
  24 KB (3,507 words) - 16:06, 5 June 2022
• GEOS-Chem 13.0.0
  ...GBD-MAPS total anthropogenic emissions by default; emissions by fuel type is optional ...FP meteorology for July 2016 are from the GEOS-5.13.1 system while MERRA-2 is frozen at GEOS-5.12.4. See NASA GMAO's website for more details on differen
  448 KB (58,579 words) - 18:10, 3 January 2023
• GEOS-Chem Newsletter November 2010
  Here is your November GEOS-Chem Newsletter. Claire Carouge has arrived in Australia! She is now providing support for GEOS-Chem from her location in Canberra. We ask
  12 KB (1,902 words) - 18:22, 8 December 2016
• GEOS-Chem Newsletter Winter 2013
  The current released version of GEOS-Chem is [[GEOS-Chem v9-01-03|v9-01-03]], released in September 2012. If you have n #The [[Hg and POPs Working Group]] is working on a 1-yr [[Mercury|Hg simulation]], based on v9-02c.
  12 KB (1,964 words) - 14:08, 19 June 2019
• Aerosol thermodynamical equilibrium
  ...ementation of the MARS-A scheme of ''Binkowski and Roselle'' [2003]. This is an alternative option. ...heme [''Fountoukis and Nenes'', 2007], whose implementation into GEOS-Chem is described by [http://acmg.seas.harvard.edu/publications/pye/pye_2009.pdf ''
  11 KB (1,828 words) - 16:27, 18 June 2019
• Mercury
  ...s. Please also visit our [[Global Terrestrial Mercury Model]] page, which is an option that can be used with the GEOS-Chem mercury simulation. ...Jenny Fisher, Anne Soerensen, Noelle Selin, and others. The benchmark code is publicly available though you need a (free) account on github. If you'd lik
  17 KB (2,814 words) - 14:52, 18 October 2023
• Scale factors for anthropogenic emissions
  <blockquote>Trend data for the following regions is derived from:</blockquote> ...year to 2003, the last year of available statistics, unless its base year is after 2003. Our approach follows ''Bey et al.'' (2001) and ''Park et al.''
  10 KB (1,471 words) - 18:21, 24 October 2023
• GEOS-Chem v8-01-01
  ...burning_emissions#25-Sep-2007|Last year of GFED2 biomass emissions, (which is now 2006)]] into v8-01-01. #* The only difference is that this benchmark was done w/ GEOS-5 met and v7-04-13 was done w/ GEOS-4
  13 KB (1,925 words) - 18:05, 20 June 2017
• Bromine chemistry mechanism
  ...d in at 2x2.5, and re-gridded to whatever resolution the actual simulation is using REGRID_A2A</p> ..., though the GEOS4/GCAP treatment should be identical and preferable as it is more universal.</p>
  12 KB (2,004 words) - 09:35, 19 April 2018
• List of MERRA-2 met fields
  ...deg; lat x 0.625&deg; lon x 72 vertical levels. The horizontal resolution is 2x coarser than the GMAO "forward processing" product (which we refer to as *The original name in the GEOS-FP raw data files is FRLANDICE.
  22 KB (3,364 words) - 02:50, 9 July 2019
• Viewing the revision history
  ...best way to examine the contents of your Git-backed GEOS-Chem source code is to use the '''gitk''' viewer. There are two ways to do this: The local time in seconds is then used to compute the field
  9 KB (1,394 words) - 20:27, 5 August 2019
• Ship emissions
  *CEDS is the default global ship emission inventory in [[GEOS-Chem 12#12.1.0|GC 12.1 *HTAP is a research option but not a standard option.
  13 KB (1,914 words) - 16:08, 20 September 2022
• Dynamic tropopause
  ...ked in the stratosphere. Therefore, a robust definition of the tropopause is required. The location of the tropopause is computed at each dynamic timestep of a GEOS-Chem simulation, according to t
  3 KB (464 words) - 14:40, 13 July 2023
• GEOS-Chem 14.2.0
  *NOTE: Will not affect benchmarks because this function is not currently used *NOTE: Will not affect benchmarks, because the benchmark year is 2019, and we are only adding new years 2020-2022.
  347 KB (45,155 words) - 19:50, 5 October 2023
• GEOS-Chem Newsletter November 2009
  Here is your November 2009 GEOS-Chem Newsletter. Happy Thanksgiving to one and all ...asure interacting with so many of you, taking part to so many projects. It is going to feel empty for a while! I will sure bring back with me many friend
  11 KB (1,521 words) - 18:12, 8 December 2016
• GEOS-Chem Newsletter December 2010
  The next GEOS-Chem Steering Committee telecon date is '''''Tuesday, January 25th, 2011 @ 10:30 ET (15:30 GMT)'''''. Contact your ...Working Group Chairpersons to be informed about the type of research that is being conducted by individual GEOS-Chem users while avoiding duplication of
  15 KB (2,259 words) - 18:25, 8 December 2016
• CABLE
  ...259200 points). File size is saved by only including land point fluxes (it is a biosphere model, after all), leaving 62433 points. ...0.5x0.5° (basically map the flux to match the corresponding points if it is a land point, or set to 0 if not). Then I can worry about aggregating to ot
  3 KB (462 words) - 19:18, 16 February 2016