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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
