Search results

Create the page "Is" on this wiki! See also the search results found.

• 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