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- '''''The Intel Fortran compiler is our recommended proprietary compiler for GEOS-Chem.''''' === An Intel license is required ===55 KB (8,425 words) - 17:57, 24 October 2023
- ...in the GEOS-Chem, which have to be implemented manually. Currently, there is not an adjoint equivalent of every part of GEOS-Chem. ...ass="math">∂<em>y</em> / ∂<em>x</em></span> is a scalar, and ''x'' is a 2-, 3- or 4-dimensional field). The adjoint code can also be used for inv80 KB (12,285 words) - 16:56, 18 June 2019
- ...al <nowiki>[2000]</nowiki>] describes the algorithm in full. This scheme is also described in [http://acmg.seas.harvard.edu/publications/liu2001.pdf '' ...tation formation overhead. This will overestimate rainout effect when Fk+1 is much larger than Fk. Therefore, we now apply rainout effect to precipitati46 KB (7,334 words) - 20:14, 2 January 2019
- ...concentrations. MIX shows an increase in the SO2 emission totals, but that is likely dominated by the increase in Indian SO2 emissions and the inclusion :The increase in global NO emissions is primarily driven by EMEP and AEIC emissions. There may be a problem in the154 KB (24,591 words) - 21:08, 20 September 2022
- ...enomenon is due to lack of moisture handling within transport. Tracer mass is distributed relative to moist rather than dry air pressure and therefore pr Below is a high-level summary of the moisture updates added to v11-01. All of these46 KB (6,421 words) - 16:08, 7 December 2016
- ...ons_when_GFED_is_turned_off|Fix bug in biomass burning emissions when GFED is turned off]] ...error trap in to avoid a segmentation fault when the DustGinoux extension is turned off]]88 KB (13,616 words) - 21:07, 20 September 2022
- ...enomenon is due to lack of moisture handling within transport. Tracer mass is distributed relative to moist rather than dry air pressure and therefore pr Below is a high-level summary of the moisture updates added to v11-01. All of these44 KB (6,046 words) - 17:35, 6 December 2016
- ...n a study by Mills (2005), the mean cross-section between 412.5 and 850 nm is estimated at 2.542 × 10−25 cm2. We also add photolysis of ClOO and ClNO2 *This file is only needed if the [[UCX chemistry mechanism]] is enabled.59 KB (8,891 words) - 18:49, 11 February 2023
- ...tandard "classic" capability (GCC) but operates on a cubed sphere grid and is parallelized using a message-passing interface (MPI) implementation. GCHP i ...s (e.g. v11-02a, v11-02b, etc). The most recent preliminary v11-02 release is v11-02-Release-Candidate and the final release will be v11-02-Final availab41 KB (6,396 words) - 18:56, 10 May 2019
- :My quick fix is very simple, which only changes one number in the source code: :Note that [this fix] is not ideal. We have a better way of doing it which requires some sort of cou70 KB (10,330 words) - 21:56, 20 December 2019
- GEOS-Chem v9-02 is the first version of GEOS-Chem for which we issued a '''PROVISIONAL RELEASE ...Y_PBL_mixing_is_used|Corrected unit conversion bug when TURBDAY PBL mixing is used]]99 KB (14,884 words) - 20:45, 20 September 2022
- *This feature is optional (default off) *This feature is optional (default off)95 KB (13,968 words) - 21:57, 20 December 2019
- :Christoph Keller has treated OCPI in the same manner in HEMCO. If SOA is turned in in GEOS-Chem v10-01 and later versions, HEMCO will not calculate ...but SOA mass goes to other, SOA-specific tracers when the interactive SOA is turned on.166 KB (26,088 words) - 18:43, 28 May 2020
- ...D = 75μm, where <tt>U*,t</tt> is a minimum, and the total vertical flux is given by:</blockquote> ...tt> = 100 mm, recommended by Z03a for dust mobilization candidate cells. F is distributed by particle size as a globally uniform tri-modal lognormal prob50 KB (7,218 words) - 16:41, 16 November 2020
- ...provide some general background information about how floating-point math is implemented on computers—and some common pitfalls that you may encoun == Floating-point is an approximation to the real number system ==18 KB (2,783 words) - 18:14, 7 December 2016
- *The TOMAS team is doing further validation, which will continue into v11-01 ...he top-level data directory on your system. (If you don't know where that is, ask your sysadmin.)99 KB (15,209 words) - 20:26, 20 September 2022
- <span style="color:green">'''''This page is for documentation of the isoprene chemistry mechanism (cf. Fabien Paulot) i This chemistry is largely base on Paulot et al.(2009a, ACP) for high-NOx regime and Paulot et52 KB (7,571 words) - 15:30, 5 December 2016
- *A line continuation character (usually <code>&</code>) is placed in column 6 An example module is shown below.49 KB (7,048 words) - 19:59, 20 September 2022
- ...GEOS-Chem is predominantly used for simulating tropospheric chemistry, it is necessary to deal with species that may have net stratospheric sources and ...each species. The new concentration at the end of each chemistry time step is then determined by solving47 KB (6,806 words) - 16:46, 15 October 2019
- ...mistry mechanism is included in the "benchmark" chemistry mechanism, which is selected by default when you compile and run GEOS-Chem "out of the box". T * Photolysis and UV transfer is calculated using the [[FAST-JX v7.0 photolysis mechanism|Fast-JX v7.0a]] mo34 KB (5,019 words) - 15:57, 17 May 2018
- ...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 the158 KB (24,655 words) - 18:49, 28 May 2020
- ...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
- ...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
- 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 formulati40 KB (5,780 words) - 14:58, 18 October 2019
- ...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 [[Su27 KB (4,206 words) - 14:06, 19 June 2019
- 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
- ...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 is36 KB (5,768 words) - 15:06, 19 June 2019
- ...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
- ...="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 f41 KB (6,157 words) - 14:19, 19 July 2023
- ...="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
- # <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 format39 KB (6,282 words) - 11:36, 9 October 2018
- ...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 m33 KB (5,406 words) - 21:11, 20 November 2023
- ...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
- ...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
- '''''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 co52 KB (7,498 words) - 17:56, 24 October 2023
- 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
- ...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
- ...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.d23 KB (3,379 words) - 17:43, 15 November 2017
- 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
- ...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 a21 KB (3,022 words) - 14:58, 25 September 2017
- ...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 center25 KB (3,278 words) - 20:30, 2 January 2019
- ...="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
- ...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 Fortra20 KB (2,871 words) - 21:59, 11 January 2019
- :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
- ...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
- ...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 GE16 KB (2,242 words) - 14:12, 10 June 2019
- ...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 p29 KB (4,467 words) - 18:28, 1 November 2021
- == 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
- ...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 midpoint28 KB (4,078 words) - 15:45, 19 June 2019
- 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 retroacti27 KB (3,988 words) - 18:38, 28 May 2020
- 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
- .../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
- ...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
- 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-C14 KB (2,171 words) - 15:18, 19 June 2019
- ...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 a17 KB (2,587 words) - 20:10, 19 September 2022
- #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_m8 KB (1,241 words) - 20:42, 13 July 2023
- :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 hourly38 KB (5,526 words) - 15:22, 19 June 2019
- ===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
- 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 benchm34 KB (5,418 words) - 18:21, 9 March 2016
- ...deg; lat x 0.625° 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° x 0.625°.'''''</span>25 KB (3,634 words) - 18:47, 28 May 2020
- 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
- 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
- ...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 <co15 KB (2,305 words) - 20:53, 20 September 2022
- *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 surface34 KB (3,049 words) - 15:03, 19 June 2019
- ...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: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 wi10 KB (1,773 words) - 14:20, 19 July 2023
- ...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
- ...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
- ...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
- ...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
- ...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
- # 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
- 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 pa9 KB (1,417 words) - 15:20, 19 June 2019
- ...nt [http://gmao.gsfc.nasa.gov NASA/GMAO] operational met data product. It is produced with a native resolution of 0.25° (lon) x 0.3125° (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 GEOS34 KB (5,204 words) - 14:15, 15 May 2017
- ...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 s9 KB (1,367 words) - 19:33, 19 July 2018
- ...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
- ...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
- 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
- <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 t32 KB (4,575 words) - 19:09, 17 August 2021
- 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 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 on18 KB (2,894 words) - 16:50, 8 December 2016
- ...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 so20 KB (3,149 words) - 20:10, 22 May 2017
- ...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 of12 KB (1,903 words) - 20:00, 2 January 2019
- 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 relationshi21 KB (3,286 words) - 16:51, 15 July 2019
- 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
- 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
- '''''NOTE: Registration is now closed.''''' '''Matthew Cooper''', who is working with Randall Martin at Dalhousie University, will join the GEOS-Che20 KB (3,183 words) - 14:05, 19 June 2019
- 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
- ...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
- <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
- ...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 a18 KB (2,561 words) - 20:18, 22 September 2022
- ...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 change9 KB (1,412 words) - 21:08, 1 June 2023
- ..., 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
- ...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
- #<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 has20 KB (3,001 words) - 15:15, 19 June 2019
- ...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 necessa14 KB (2,160 words) - 17:42, 15 November 2017
- Here is the June 2009 GEOS-Chem Newsletter. Happy Summer Solstice! |Validation is ongoing13 KB (1,989 words) - 18:12, 8 December 2016
- ...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
- 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 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 wildcard21 KB (2,963 words) - 05:45, 8 October 2023
- ...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 up54 KB (8,455 words) - 16:52, 29 February 2024
- #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
- ...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
- 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 an24 KB (3,507 words) - 16:06, 5 June 2022
- ...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 differen448 KB (58,579 words) - 18:10, 3 January 2023
- 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 ask12 KB (1,902 words) - 18:22, 8 December 2016
- 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
- ...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
- ...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 lik17 KB (2,814 words) - 14:52, 18 October 2023
- <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
- ...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-413 KB (1,925 words) - 18:05, 20 June 2017
- ...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
- ...deg; lat x 0.625° 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
- ...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 field9 KB (1,394 words) - 20:27, 5 August 2019
- *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
- ...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 t3 KB (464 words) - 14:40, 13 July 2023
- *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
- 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 friend11 KB (1,521 words) - 18:12, 8 December 2016
- 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 of15 KB (2,259 words) - 18:25, 8 December 2016
- ...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 ot3 KB (462 words) - 19:18, 16 February 2016
- The problem is that when the actual number of tracers is increased beyond 120, this results in an array-out-of-bounds error. The fix is to use the <tt>MAX_DIAG</tt> and <tt>MAX_TRACER</tt> parameters from the <t14 KB (2,236 words) - 16:02, 16 November 2017
- GEOS–Chem model development is done in a distributed manner. [https://geoschem.github.io/geos-chem-people- === Git is a distributed source code management system ===5 KB (800 words) - 20:27, 20 September 2022
- ...ducts/NRT_products.php version 5.12.4]. Overall, the structure of MERRA-2 is very similar to the GMAO "forward processing" data product, which we refer *[[List_of_MERRA_met_fields#SNOMAS|Missing coverage at poles is now corrected, as per MERRA]]25 KB (3,861 words) - 18:49, 28 May 2020
- === What is CMake? === CMake is a program that generates Makefiles. This is an oversimplification, but it describes the essence of CMake.7 KB (961 words) - 23:34, 9 November 2020
- ...en if the global & local error criteria were satisfied. If this condition is encountered, we now revert to the concentrations at the end of the previous ...omass_burning_emissions#25-Sep-2007|Last year of GFED2 biomass emissions]] is still 2005 in this version. If you want to use the 2006 emissions you will6 KB (1,003 words) - 18:22, 20 June 2017
- Happy New Year 2010 to one and all! Here is your January Newsletter. We encourage each GEOS-Chem user to join the Working Group that is most relevant to his/her area of research.9 KB (1,392 words) - 18:17, 8 December 2016
- On this page we discuss the land map from Jennifer Olson that is currently used by the GEOS-Chem [[Dry deposition]] and [[Soil NOx emissions ...r to facilitate the SEAC<sup>4</sup>RS campaign). The Olson 2001 land map is now used with all Met sources in GEOS-Chem.19 KB (2,688 words) - 20:08, 2 January 2019
- where <tt>NAME</tt> is to be the name of the feature or bug fix that you are implementing. ...e in a Git-backed code directory, and want to know what the current branch is, type:6 KB (915 words) - 20:27, 5 August 2019
- ...nch to an earlier commit, you can use Git's '''hard reset''' option. This is best done with the [[Viewing_the_revision_history#Use_Gitk_to_see_a_graphic In this example above, the '''feature/MyFeature''' branch is checked out, and has some '''unstaged changes'''. These are updates that h8 KB (1,267 words) - 20:30, 5 August 2019
- Below is the definition of PM2.5 used in GEOS-Chem and approved by the [[Aerosols Wo The SIA recommendation at 35% RH is less certain since it depends on the efflorescence RH of the SIA in the aer10 KB (1,374 words) - 13:32, 4 November 2021
- ...="color:red"><big><strong>[https://geoschem.github.io/gamap-manual/ GAMAP] is now obsolete. We recommend using [https://gcpy.readthedocs.io GCPy] for an ...the regridding and is unable to read the fields properly if the diagnostic is not defined in diaginfo.dat.7 KB (1,068 words) - 14:20, 19 July 2023
- The tables below list the following parameters for each diagnostic that is archived to bpch format: |A list of simulations for which this particular diagnostic is valid.133 KB (18,925 words) - 19:57, 16 September 2022
- The GMAO "forward processing" (aka GMAO FP or GEOS5-FP) met field product is the latest update of the GMAO GEOS-5 met data product. GEOS FP has finer na '''GEOS-FP is the name of our GEOS-Chem met field archive of the GMAO FP product.''' In25 KB (3,881 words) - 18:59, 13 February 2024
- ...slated for removal from [[GEOS-Chem v11-01]] once the new FlexChem solver is implemented.'''''</span> ...on two of our machines tuque and beret. One of the error messages on tuque is like this:5 KB (637 words) - 20:54, 10 February 2016
- Here is the August 2009 GEOS-Chem Newsletter. ...://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 pa9 KB (1,496 words) - 14:15, 19 June 2019
- ...ons developed by [[User:Fabien_Paulot|Fabien Paulot]]. A full description is given in [http://acmg.seas.harvard.edu/publications/2014/paulot2014_emissio ...in spring associated with manure and mineral fertilizer application. There is some evidence for the effect of European regulations of NH3 emissions, nota13 KB (2,004 words) - 14:43, 19 June 2019
- ...d the output from the 12.2.0-TransportTracers benchmark confirms that mass is now conserved for both mixing schemes. ...alability, and memory usage for this benchmark increased from 12.0.0. This is primarily because this benchmark saves out monthly netCDF diagnostics in <t47 KB (6,910 words) - 19:14, 14 December 2022
- Committing is best done with the [[Using Git GUI|Git GUI]]. *'''New commit:''' This is the default. Assumes you are making a totally new commit.6 KB (1,045 words) - 20:28, 5 August 2019
- * Validation is ongoing |Fix unintuitive error handling when untemplated file is missing178 KB (22,566 words) - 17:24, 26 October 2022
- Registration for IGC6 is now closed. If you cannot attend the meeting, you may view IGC6 talks via ..., please take a moment to write to the co-chairs of the Working Group that is best aligned with your research interests in order to let them know about t15 KB (2,311 words) - 15:40, 19 June 2019
- Merging is the process of combining two Git branches together. It can be done either The easiest way to merge branches is by using the Git GUI. Follow these steps:5 KB (772 words) - 20:29, 5 August 2019
- ...ed executes roughly 3-4 times faster than previous versions! This speed-up is due to parallelization within input read across one node, and the MAPL upda ...issue but we find that doing so changes the output. Lizzie Lundgren (GCST) is investigating differences in GCHP output that happen when restarting a simu71 KB (9,614 words) - 16:19, 26 August 2020
- ...em/images/1/15/GFED4.1_README.pdf attached]. This latest version GFED 4.1s is being released July 3, 2015. ...ated (though updates are very minor). In addition, from 2003 onwards there is now daily and diurnal info available in the dataset - this should be added12 KB (1,923 words) - 13:33, 12 May 2023
- On this page we describe the Global Terrestrial Mercury Model (GTMM), which is an option in the current [[Mercury|GEOS-Chem mercury simulation]]. ...ing of mercury in organic soils is controlled by the cycling of carbon and is modeled within the carbon cycling framework of the CASA biogeochemical mode4 KB (647 words) - 14:49, 18 October 2023
- Here is the latest GEOS-Chem Newsletter ... The GEOS-Chem Meeting Recap edition. All users are encouraged to join the GEOS-Chem Working Group that is most closely aligned with their area of research. Please contact the relev6 KB (1,013 words) - 18:23, 8 December 2016
- <span style="color:darkorange">'''''FINN is available as an option for simulations with [[GEOS-Chem v10-01]] and higher ...INN v1.6 is turned off in the "out-of-the-box" GEOS-Chem simulations (GFED is used instead). However you can turn on FINN emissions in the [[HEMCO|HEMCO12 KB (1,925 words) - 15:18, 26 October 2018
- |Preserve mass conservation when advection is off by adding delta pressure to internal state for mixing ratio scaling dur ...pecies as well as a transported species. The overall impact of this update is small, contributing to a global mean OH change of +0.0083%.53 KB (7,304 words) - 17:04, 13 February 2020
- ...on_Synoz_when_Linoz_is_set_to_false_in_input.geos|Turn on Synoz when Linoz is set to false in input.geos]] ...neflight.dat|Planeflight diagnostic fix: Stop with error if the plane type is not specified in Planeflight.dat]]41 KB (6,194 words) - 14:22, 22 March 2021
- This is the native resolution of the [[MERRA-2]] reanalysis product from GMAO. This is the [[MERRA-2]] native resolution nested grid over China and SE Asia.28 KB (1,714 words) - 11:35, 28 June 2023
- The [http://www.cs.uoregon.edu/research/tau/home.php TAU Performance System] is a profiling tool for performance analysis of parallel programs in Fortran, The best way to build TAU is with Spack.3 KB (530 words) - 18:12, 24 October 2023
- Here is the July 2009 GEOS-Chem Newsletter. Please take a moment to read it, ...://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 pa7 KB (1,160 words) - 18:23, 8 December 2016
- ...://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 Mat Evans is going to set up a telecon to discuss isoprene chemistry in GEOS-Chem. The7 KB (1,046 words) - 18:16, 8 December 2016
- ...ataset-mix.html. (Click on the "EN" tab for English.) The current version is MIX v1.1. <blockquote>Which year of inventory is GEOS-Chem using? 2008 or 2010?</blockquote>8 KB (1,130 words) - 15:14, 28 April 2016
- ...rkholder et al., 2015)." A new page ([[Updates in JPL Publication 15-10]]) is being created to compare rates between GEOS-Chem v10 and JPL Publication 15 ...th the statement in the accompanying notes that the rate at 298 K provided is the average of three references [Helleis, et al 1994; Leather et al. 2012;14 KB (2,217 words) - 20:19, 22 May 2017
- ...99; ''Chin et al.'', 2002; ''Chung and Seinfeld'', 2002]. All secondary OC is assumed to be hydrophilic. The four aerosol types in the model are further ...', 1986] dependent on local surface type and meteorological conditions; it is small compared to wet deposition. ''Liu et al.'' [2001] found no systematic10 KB (1,541 words) - 19:50, 2 January 2019
- This is the first GEOS-Chem benchmark to utilize [https://github.com/geoschem/gcpy ...h had a particularly active June. For example, 2009 June SO2 eruption mass is 4 times the average of the 2000-2009 June. The cycling option takes 2009 an21 KB (3,084 words) - 18:27, 4 June 2019
- One of the really nice features of Git is that it can create '''patch files''', or files which contain a list of chan The other way to share your code updates with others is to create a pull request from your local Github account. This will be desc9 KB (1,505 words) - 20:29, 5 August 2019
- ...parison/. The impact on total emissions from CEDS in the 1-month benchmark is: ...genic emissions. The impact on biogenic emissions from the MEGAN extension is:605 KB (76,005 words) - 18:49, 3 January 2023
- ...s based on their latest estimates, which run until 2012, if the old format is still useful post-HEMCO. ...MCO to more accurately regrid onto a variety of GEOS-Chem grids. This file is read with the [[HEMCO|HEMCO emissions component]] and will be validated wit9 KB (1,381 words) - 20:43, 16 September 2022
- ...e linearly between two consecutive time steps. The interpolation frequency is determined by the update frequency provided in the HEMCO configuration file ...nters 2014, the data is updated to 0.6 * DATA_2010 + 0.4 * DATA_2020. This is the default setting.</blockquote>6 KB (916 words) - 21:26, 13 July 2023
- '''''This version is currently in development''''' *[https://github.com/KineticPreProcessor/KPP/releases/tag/3.0.0 KPP 3.0.0 is now released]83 KB (11,024 words) - 16:10, 5 October 2023
- ...ctm.bpch</tt> and <tt>ts_satellite.bpch</tt>. In fact for ND51, a variable is declared with a wrong type. So in <tt>diag51_mod.f</tt> you need to replace ...Bob Yantosca have implemented a fix into <tt>diag3.f</tt> such that there is now a test for the name of each tracer. As a side-effect of this fix, you8 KB (1,244 words) - 17:38, 15 November 2017
- ...CMAQ, please use Barron Henderson's program <tt>pncglobal2cmaq</tt>, which is described on our [[Linking GEOS-Chem to CMAQ]] wiki page.'''''</span> The objective of this information is to facilitate use of CMAQ. Although this work was reviewed by EPA and appro7 KB (1,019 words) - 13:58, 19 June 2019
- == First, check if Git is already installed == To check if it is already installed, you can ask for the version at the Unix prompt. Type:3 KB (406 words) - 20:20, 5 August 2019
- When a new GEOS-Chem version is released, we recommend that you [[#Downloading a new GEOS-Chem version|down In this example, the '''master''' branch is checked out, which corresponds to GEOS-Chem version 12.3.2.7 KB (957 words) - 20:29, 5 August 2019
- ...nternalBenchmarks/GCC_13.3.0-alpha.3/Tables/OH_metrics.txt Global mean OH] is reduced by -1.49%. Complete results from a 1-month benchmark evaluating the ...expected because the function in which this bug occurs (<tt>CloudHet</tt>) is used in the rate computations of many heterogeneous reactions. See [https:150 KB (19,810 words) - 18:18, 19 February 2022
- ::Where ΔT is the emission timestep in seconds. *Emitted globally at the surface such that the mixing ratio is maintained at 100 ppbv7 KB (1,058 words) - 17:18, 24 October 2023
- '''''This version is the current stable version of GEOS-Chem''''' *Fast-JX is still available as a build option and remains the default for the Hg simula301 KB (39,724 words) - 18:10, 14 February 2024
- ...ospheric composition problems. Central management and support of the model is provided by the [https://acmg.seas.harvard.edu/ Atmospheric Chemistry Model *02 Apr 2024: [[GEOS-Chem 14.3.1]] is now available!6 KB (735 words) - 16:25, 2 April 2024
- A good measure of how well your job scales across multiple CPUs is the <span style="color:blue">ratio of CPU time to wall-clock time</span>. ...Us would have a CPU time / wall time ratio of exactly 8. This in practice is never attained due to file I/O as well as system overhead. By dividing the8 KB (1,058 words) - 20:44, 21 December 2015
- ...the existing nested-grid resolutions (0.5x0.667 or 0.25x0.3125), no change is necessary for the advection code. Only need to change the domain-specific p ...emissions in the nested-grid runs on the fly, but you should test if this is the case.3 KB (559 words) - 22:19, 11 January 2019
- ...questions of interest to the GEOS-Chem community. The goal of this webpage is to enable communication across the GEOS-Chem community about these projects ...surement teams if you are using the ATom observations, as many of the data is preliminary and may change.4 KB (602 words) - 15:45, 6 December 2019
- ...SS GCM allows for condensed water in the atmosphere (i.e., condensed water is not immediately precipitated), resulting in frequent nonprecipitating shall ...to both the Relaxed Arakawa and Hack/Zhang-McFarlane schemes in GEOS-Chem) is described in Section 1 of [http://acmg.seas.harvard.edu/geos/wiki_docs/depo4 KB (662 words) - 20:46, 13 July 2023
- ...ation in GEOS-Chem. This value is an indicator of how "hot" the chemistry is. Please also see the related topic about the [[Methyl chloroform lifetime| ...mark simulations. The mean OH is an indicator how the chemistry mechanism is performing. Typical values are 10–12 x 10<sup>5</sup> molecules cm<sup>-1710 B (108 words) - 14:54, 18 October 2023
- ...l GMAO met data product is now the [[GEOS-FP]] operational product , which is supported in [[GEOS-Chem v9-02]] and higher versions. We are processing GE ..."color:red">'''''The current GMAO reanalysis product is [[MERRA-2]], which is based on GEOS-DAS v5.12.4. MERRA-2 will look very similar to the current [1 KB (215 words) - 19:36, 9 February 2016
- ...error trap in to avoid a segmentation fault when the DustGinoux extension is turned off]] ...ons_when_GFED_is_turned_off|(v11-02f) Fix bug in biomass burning when GFED is turned off]]33 KB (5,225 words) - 20:46, 2 January 2019
- The GEOS-Chem source code repository is available for remote download via Git, from our Github repository: ...n your disk into which the GEOS-Chem source code files will be placed. It is up to you to pick <tt>LOCAL-CODE_FOLDER</tt>.4 KB (544 words) - 20:26, 5 August 2019
- #'''Unstaged Changes''' (@ top-left): An unstaged change is a modification that Git does not know about yet. If you modified any files This menu is pretty self-explanatory. You can choose to:3 KB (507 words) - 20:27, 5 August 2019
- *NOTE: This is an optional emissions inventory. ...ls/Aerosols_ColumnOptDepth.pdf AOD plots], where total AOD decreases. This is consistent with the [[FAST-JX_v7.0_photolysis_mechanism#Updated_aerosol_hyg108 KB (15,559 words) - 16:40, 15 October 2019
- The GEOS-Chem source code is maintained on Github.com at '''https://github.com/geoschem/geos-chem'''. Al We also recommend that you view this video tutorial, which is posted at our GEOS_Chem Youtube channel: [http://youtube.geos-chem.org '''y5 KB (676 words) - 14:56, 3 February 2021
- The aerosol simulation is an offline simulation for aerosol tracers only. It uses archived monthly m # The aerosol-only simuation is currently functional in GEOS-Chem Classic.5 KB (472 words) - 21:01, 20 September 2022
- ...//geos-chem.seas.harvard.edu/geos-welcome I am a GEOS-Chem new user. What is expected of me?] * What is the [[GEOS-Chem horizontal grids|horizontal resolution]] and [[GEOS-Chem ve5 KB (725 words) - 18:06, 20 September 2022
- ...[[NOx-Ox-HC-aerosol|full-chemistry simulation]]. The tagged O3 simulation is also used to spin up the ozone into steady-state when validating a new mete The default setting is the '''SIMPLE TAGGED O3 SIMULATION''', which carries 2 tracers:2 KB (345 words) - 17:24, 24 October 2023
- ...specific day and time, we recommend you check this list to make sure there is not a known issue with the met fields on that day. ...the only times we see an algorithm fail in FP and produce undefined values is in association with a very intense cyclone frontal system where a tropopaus10 KB (1,329 words) - 17:09, 11 August 2017
- ...blications/2012/Murray_et_al_2012.pdf Murray et al. (2012)]. Lightning NOx is mainly released at the top of convective updrafts following Ott et al. (201 :All that is needed [for this update] is to change the following line in hcox_lightnox_mod.F90 from13 KB (1,787 words) - 20:53, 27 November 2018
- ...ine dust emissions for 2016, so further validation with a 1-year benchmark is needed to ensure these changes make sense. ...d-independent lightning NOx emissions. The pattern of the changes globally is consistent with the expected changes from caused by regridding. Some differ96 KB (13,416 words) - 13:11, 10 October 2019
- ...at the surface by up to 5 ppb, primarily at high latitudes. Global mean OH is increased by 0.15% with these changes. :In the meantime, the 1-month benchmark is approved and we can move on to the 1-year benchmark.148 KB (20,511 words) - 17:29, 25 June 2020
- * Xu Feng is the current lead maintainer of the model, including scientific development ...al stages of development. Please contact us to express interest. A release is anticipated for Late 2020.3 KB (428 words) - 17:21, 30 July 2020
- The GEOS-Chem benchmarking procedure is described below. #If the update is for a [[GEOS-Chem_chemistry_mechanisms#Specialty_simulations|specialty simu6 KB (921 words) - 14:35, 18 October 2023
- '''''GNU Fortran is our recommended open-source compiler for GEOS-Chem.''''' ...compatible with the [[GNU Fortran compiler]], aka <tt>gfortran</tt>. This is a free and open-source compiler that comes pre-installed on many modern com3 KB (397 words) - 17:56, 24 October 2023
- ...et al., 2016 (under review in ''Atmospheric Chemistry and Physics''). This is an experimental mechanism that has not yet been included in the standard GE This chemistry is largely based on the scheme developed by Browne et al. (2014) for use in WR6 KB (859 words) - 00:48, 11 March 2016
- ...ins what was the problem, what was done to correct it and then what impact is to be seen in the results. You can find a full explanation and some output ...ons are changed by 30 min of transport and 60 min of chemistry. This state is not physically measurable. At the end of the second time step, tracers conc4 KB (553 words) - 15:12, 19 June 2019
- :The problem is that 65 years (1950~2014) of data are stored in a single file. But most use ...ith the current simulation year. This causes issues if the simulation year is beyond the last year of CEDS emissions available (2014). To avoid this issu7 KB (1,061 words) - 20:36, 16 July 2019
- ...de these types of files, you must create a <tt>.gitignore</tt> file. This is a text file containing the files (or file types, using the <tt>*</tt> wildc Here is what the <tt>.gitignore</tt> files that are found in each GEOS-Chem source2 KB (366 words) - 20:26, 5 August 2019
- Github is a site where you can host multiple Git repositories. It is particularly useful for open-source projects such as GEOS-Chem.3 KB (397 words) - 20:30, 5 August 2019
- Because the GEOS-FP meteorological product is an operational dataset, system changes and updates such as these are made a ...as a native resolution of 0.5 degree x 0.625 degree native resolution, and is generated with a “frozen” assimilation system based on the GEOS GCM ver22 KB (2,950 words) - 15:03, 28 May 2020
- ...Skip reading FLASH_DENS and CONV_DEPTH fields when lightning NOx extension is turned off] ...update causes large differences, most notably in the halogen species, and is responsible for a 3% increase in the global OH concentration.114 KB (16,240 words) - 11:56, 15 July 2020
- ...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 * is a self-contained, consistent, and user-friendly software package for readin2 KB (319 words) - 19:02, 16 September 2022
- ...~12 km), includes mass fluxes and derived winds. <br><b>Using these fields is an option in GCHP.</b> ...that will introduce a significant change in the full-chemistry simulation is tagged with an alpha version in Git. For each of these alpha versions, the435 KB (56,731 words) - 18:47, 12 January 2023
- ...users and engineers interested in model software development. Its purpose is to coordinate: ...8NTmnOi-cw8D3BZyaXIp8lQhs_fEozs/edit?usp=sharing Google spreadsheet] which is publicly viewable. Please contact the SE Working Group co-chairs to gain ed3 KB (415 words) - 17:25, 10 January 2023
- ...GEOS-Chem. Advected tracers are carried in the <tt>STT</tt> array (which is declared in <tt>GeosCore/tracer_mod.F</tt>), and are transported by the win ###<p>In subroutine SETTRACE (NOTE: Only do the following if species is included in SMVGEAR chemical mechanism<p>4 KB (595 words) - 21:25, 10 May 2023
- ...GFED4 biomass burning emissions|GFED4 biomass burning emission inventory]] is now the current default biomass burning dataset for GEOS-Chem (introduced i ...ice of emissions inventory can significantly impact model results. If this is not feasible, please take the time to see how much emissions estimates vary6 KB (915 words) - 20:41, 13 July 2023
- The emission inventory is available as daily text (.rc) files in the format: ...e used then the closest available year will be used if the simulation year is outside of the available time period.2 KB (312 words) - 17:43, 24 October 2023
- ...by setting <tt>use_gcclassic_timers: true</tt> in geoschem_config.yml and is printed to the log file.775 B (113 words) - 17:32, 25 March 2024
- |This is an unofficial benchmark and the first GCHP benchmark using [https://github. |This is the first benchmark to utilize [https://github.com/geoschem/gcpy GCPy]46 KB (5,503 words) - 16:29, 2 April 2024
- ...s page we list the current priorities for GEOS-Chem development. This list is continuously updated based on code readiness and input from the [https://ge *'''Currently on hold while an issue with seasonality in the new CEDS data is being investigated by the authors.'''15 KB (2,103 words) - 20:55, 18 April 2024
- '''''This version is currently in development''''' ...-law function for full-chemistry reactions where the Arrhenius B parameter is zero6 KB (702 words) - 20:31, 23 April 2024
- |No (but v9-01-01 is 4.8% higher)6 KB (976 words) - 16:47, 9 February 2016
- Aviation and shipping emissions are not included, since it is hard to spatially assign the total emissions of international aviation and1 KB (178 words) - 17:49, 24 August 2018
- The default soil NOx emissions scheme in GEOS-Chem is based on the work on Rynda Hudman and Neil Moore. Bram Maasakkers further458 B (70 words) - 18:59, 2 January 2019
- The [[FAST-JX v7.0 photolysis mechanism]] is the newest version of the FAST-J software. It was incorporated into [[GEOS1 KB (186 words) - 19:47, 2 January 2019
- ''NOTE: The GEOS-Chem "Classic" benchmark for 12.3.2 is an unofficial benchmark. GEOS-Chem "Classic" 12.4.0 will be compared again44 KB (6,246 words) - 13:27, 28 May 2019
- ...um that you need. Be sure to change your name and email accordingly, this is how Git will know who you are!2 KB (366 words) - 20:20, 5 August 2019
- Each commit corresponding to a GEOS-Chem version release is tagged with the [[GEOS-Chem version numbering system|version number]] (e.g.2 KB (322 words) - 20:28, 5 August 2019
- We have been migrating bug reports to our GEOS-Chem issue tracker, which is located on our Github repository: https://github.com/geoschem/geos-chem/iss5 KB (594 words) - 13:56, 14 April 2021
- .../geos-chem/issues/847 Now zero geogenic Hg emissions if LAnthroHgOnly flag is turned on]7 KB (967 words) - 17:12, 13 September 2021
- *NOTE: This is a zero-diff update and will not change benchmark results. For GCHP benchma1 KB (163 words) - 17:58, 18 November 2021
- #[[Check if netCDF is already installed on your system]]882 B (123 words) - 20:28, 4 August 2022
- This page describes the Hudman et al 2012 soil NOx emissions algorithm, which is being used in [[GEOS-Chem v9-02]] and newer versions.5 KB (698 words) - 19:54, 16 September 2022
- An implementation of MEGAN 3.0 is currently a [https://github.com/geoschem/geos-chem/issues/1026 requested fe711 B (90 words) - 21:11, 16 September 2022
- Jintai Lin's group is going to regenerate the offline biogenic VOC emissions with the latest vers12 KB (1,541 words) - 14:50, 20 September 2022
- ...5 Bug fix: Only write dry-run header to the HEMCO.log file if HEMCO output is not already being sent to the stdout stream]69 KB (8,991 words) - 18:34, 24 January 2023
- <u>The purpose of this Working Group</u> is to provide a forum to discuss current and new developments in GEOS-Chem ass4 KB (537 words) - 18:20, 24 October 2023
- ...eoschem/hemco/pull/250 Turn off emission extensions when EMISSIONS logical is set to false]5 KB (658 words) - 14:01, 9 February 2024
- ...uctions for using GEOS-Chem in the Community Earth System Model (CESM). It is currently in development.309 B (40 words) - 20:36, 25 March 2024
- ...//github.com/geoschem/HEMCO/pull/235 Ensure that HEMCO vertical regridding is mass-conserving (plus related modifications in GEOS-Chem)]12 KB (1,569 words) - 16:24, 2 April 2024
- ...note.com/l/ATuCIZsKADFPPKnKQBlk07TFevitHHQ1Q_o/ linked note]. The approach is pretty straight-forward, but could be expanded to check conservation of fun6 KB (844 words) - 19:19, 15 April 2024
