HEMCO data directories

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On this page we describe the directory tree from which the HEMCO emissions component can read emissions inventories and other atmospheric data sets.

Overview

The HEMCO emissions component can read several types of emission inventories, as well as other types atmospheric data sets, such as production and loss rates, or concentration data. We have collated all of this data into a comprehensive directory tree structure. Each folder of the HEMCO data directory tree represents a particular emissions inventory or other data set.

At present, the HEMCO data directory tree resides on the disk servers at Harvard University (and soon at Dalhousie University). We have created a package that will let you download this directory tree to your local disk storage space. For more information, please see the Downloading the HEMCO data directories section below.

Please see our list of recommended default emission inventories, which has been compiled by the Emissions and Deposition Working Group.

--Bob Yantosca (talk) 22:27, 7 September 2017 (UTC)

Downloading the HEMCO data directories

We recommend the following methods for downloading the HEMCO data directories, depending on which GEOS-Chem version you are using:

GEOS-Chem versions Recommended download method Alternate download method
12.7.0 and later The GEOS-Chem dry-run option Manual download from either
12.6.3 and prior The hemco_data_download package Manual download from either

--Bob Yantosca (talk) 17:07, 3 December 2020 (UTC)

HEMCO data directory structure

The sections below describe each of the data sets contained in the HEMCO directory tree, grouped by type.

In each of the tables below:

The Inventory column contains a link that describes each data set in more detail. Most of these links point to existing pages on the GEOS-Chem wiki.
The Data file info column points to the README files that are stored with each data set. Each README provides a list of the files contained within a given folder, information about the data contained in each file, and (often) a description of how the files were created.
The Path column shows the location of each data set, with respect to $ROOT, the top-level HEMCO directory. For example, on the Harvard disk server, $ROOT points to the directory /mnt/gcgrid/data/ExtData/HEMCO/.
The Status column describes the current status of each data set:
DEFAULT SETTING Denotes that the data set is part of the standard emissions configuration for GEOS-Chem, that is:
OPTIONAL Denotes that the data set is not part of the the standard GEOS-Chem emissions configuration.
  • But you can still use the data set in your research applications if you wish.
If use GEOS-Chem, then we recommend that you download the data sets that are listed as DEFAULT SETTING, as these form the standard GEOS-Chem emissions configuration. You are free, however, to use any of the data sets listed below. Your choice of data sets will depend on your particular research needs.

NOTE: The inventories are displayed in the same order as in the HEMCO_Config.rc version that ships with GEOS-Chem 13.0.0.

Regional inventories

Inventory Data file info Path Directory size Status
APEI Canadian emissions
(1989-2014) 		README $ROOT/APEI/v2016-11/ 68 MB OPTIONAL
NEI2011 hourly US emissions README $ROOT/NEI2011/v2015-03 248 GB OPTIONAL
NEI2011 monthly mean US emissions README $ROOT/NEI2011/v2017-02-MM 248 GB OPTIONAL
MIX Asian anthropogenic emissions README $ROOT/MIX/v2015-03 623 MB OPTIONAL
DICE-Africa anthropogenic emissions README $ROOT/DICE_Africa/v2016-10 202 MB OPTIONAL

Global inventories

The following subdirectories of the HEMCO directory tree contain inventories of anthropogenic and biofuel emissions.

Please also see list of species included in each of these global inventories and regional inventories.

Inventory Data file info Path Directory size Status
Anthropogenic PM2.5 dust source (AFCID) README $ROOT/AFCID/2018-04 4.4 MB DEFAULT SETTING
  • Introduced in GEOS-Chem 12.1.0.
  • In GEOS-Chem 12.5.0 AFCID was separated from the DEAD dust emissions extension to allow for use with offline dust emissions as well.
CEDS anthropogenic emissions
(2020 version) 		README $ROOT/CEDS/v2020-08 73 GB DEFAULT SETTING
  • Introduced in 13.0.0
  • Reference: McDuffie et al 2020, ESSD
Tzompa et al C2H6 global emissions (2017) README $ROOT/C2H6_2010/v2019-06 536 KB DEFAULT SETTING
  • Introduced in v11-02f
  • Overwrites the C2H6 emissions from the CEDS to address underestimates
C3H8 global emissions from Xiao et al. (2008) README $ROOT/XIAO/v2014-09 308 KB DEFAULT SETTING
  • Overwrites the C3H8 emissions from CEDS to address underestimates
EDGAR v4.3 anthropogenic emissions README $ROOT/EDGARv43/v2016-11 6.2 GB OPTIONAL
  • Superseded by CEDS in 13.0.0
  • Used for sectors not included in DICE-Africa inventory
  • Turning on this option will also include trash burning emissions of NOx, SOx, CO, NH3, BC and OC from Wiedinmyer et al. (2014) and NMVOC emissions from CEDS
HTAP global anthro+biofuel README $ROOT/HTAP/v2015-03 4.5 GB OPTIONAL
  • Can be used instead of CEDS emissions.
  • NOTE: HTAP includes some regional emissions from other inventories. If you select HTAP you might not need to select the other regional inventories in HEMCO. See this document for more information.
POET (anthropogenic EOH inventory) README $ROOT/POET/v2017-03/ 38 MB OPTIONAL

Aerosol emissions

The following subdirectories of the HEMCO directory tree contain aerosol emission inventories.

NOTE: AeroCom volcanic SO2 emissions are listed under the Emissions implemented as HEMCO extensions.

Inventory Data file info Path Directory size Status
Secondary organic aerosols README $ROOT/SOA/2014-07 3.0 MB DEFAULT SETTING
  • Contain various inputs for SOA simulations.
Spatially varying OM/OC ratios for SOA species README $ROOT/OMOC/v2018-01 8.6 MB OPTIONAL
  • Controlled by a switch in input.geos
    (default is OFF)

Anthropogenic aircraft and ship emissions

The following subdirectories of the HEMCO directory tree contain inventories of anthropogenic aircraft and ship emissions.

Inventory Data file info Path Directory size Status
AEIC aircraft README $ROOT/AEIC/v2015-01 2.0 GB DEFAULT SETTING
  • Default global aircraft emissions inventory.
  • Contains fuel burned, NO, CO, and hydrocarbons.
CEDS ship (2020 version) README $ROOT/CEDS/v2020-08 73 GB DEFAULT SETTING
  • Stored together w/ other CEDS data files.
ARCTAS ship emissions (SO2) README $ROOT/ARCTAS_SHIP/v2014-07 508 KB OPTIONAL
  • Superseded by CEDS ship emissions in GEOS-Chem 12.1.0 and later versions.
  • See notes below.
ICOADS ship (CO) README $ROOT/ICOADS_SHIP/v2014-07 4.2 MB OPTIONAL
  • Superseded by CEDS ship emissions in GEOS-Chem 12.1.0 and later versions.
  • See notes below.
Corbett et al ship emissions (SO2) README $ROOT/CORBETT_SHIP/v2014-07 1.8 MB OPTIONAL
  • Superseded by CEDS ship emissions in GEOS-Chem 12.1.0 and later versions.
  • See notes below.
HTAP ship (CO, NO, SO2) README $ROOT/HTAP/v2015-03 4.5 GB OPTIONAL
NEI2011 ship (several species) README $ROOT/NEI2011/v2015-03 248 GB OPTIONAL
  • NOTE: Only extends a few km from land, so this is more of a coastal emissions inventory. It is turned off by default.

NOTES about ship emissions:

  1. CEDS ship emissions are the default ship inventory in GEOS-Chem 12.1.0 and later versions.
    • Data files for CEDS ship emissions are stored with the other CEDS emission sector files in the HEMCO data path: $ROOT/CEDS/v2018-04/.
  2. If CEDS emissions are turned off above then:
    • ARCTAS should be used over ICOADS, CORBETT, and HTAP for SO2
    • ICOADS should be used for CO and NO.
  3. The NEI2011 ship inventory only goes a few km from land, so it isn’t a complete "ship inventory". This is turned off by default in the HEMCO configuration files that ship with GEOS-Chem.

Biomass burning emissions

The following subdirectories of the HEMCO directory tree contain inventories of biomass burning emissions.

Inventory Data file info Path Directory size Status
GFED4 biomass burning (v4.1) README $ROOT/GFED4/v2020-04 867 MB DEFAULT SETTING
  • This is GFED v4.1, which is the default in v11-01 and higher versions
  • Monthly-mean data is available from 1998-2019
  • Uses daily scale factors from GFED3.
  • Uses 3-hourly scale factors from GFED3.
GFAS biomass burning emissions README $ROOT/GFAS/v2018-09 49 GB OPTIONAL
  • Monthly data are available from 2003-present and are updated monthly
FINN biomass burning (v1.5) README $ROOT/FINN/v2015-02 689 MB OPTIONAL
QFED biomass burning (v2.5r1) README $ROOT/QFED/v2018-07 57 GB OPTIONAL
QFED biomass burning (v2.4r6) README $ROOT/QFED/v2014-09 57 GB OPTIONAL
  • QFED v2.4r6 data ends in October 2016.

Offline grid-independent emissions

Offline grid-independent emissions were generated by running high-resolution (0.25°x0.3125° for GEOS-FP, 0.5°x0.625° for MERRA-2) simulations using the HEMCO standalone and online emissions from the HEMCO extensions.

Inventory Data file info Path Directory size Status
Offline dust emissions README $ROOT/OFFLINE_DUST/v2019-01 18 GB DEFAULT SETTING
Offline biogenic VOC emissions README $ROOT/OFFLINE_BIOVOC/v2019-01 1006 GB DEFAULT SETTING
Offline sea salt emissions README $ROOT/OFFLINE_SEASALT/v2019-01 848 GB DEFAULT SETTING
Offline soil NOx emissions README $ROOT/OFFLINE_SOILNOX/v2019-01 46 GB DEFAULT SETTING

Emissions implemented as HEMCO extensions

The following subdirectories of the HEMCO directory tree contain input data used by various HEMCO extensions. These HEMCO extensions compute emissions for quantities that depend on meteorological variables (e.g. emissions from lighting, biogenic processes, etc.).

NOTE: GFED3, GFED4 and FINNv1 are implemented as HEMCO extensions, but we have listed them with the other biomass burning inventories, for clarity.

Inventory Data file info Path Directory size Status
Acetone ocean exchange README $ROOT/ACET/v2014-07 52 KB DEFAULT SETTING
ALD2 ocean exchange README $ROOT/ALD2/v2017-03 52 KB DEFAULT SETTING
DMS ocean exchange README $ROOT/DMS/v2015-07 3.0 MB DEFAULT SETTING
  • This is the default in v11-01 and higher versions
  • Uses Lana 2011 climatology
NO from lightning README $ROOT/OFFLINE_LIGHTNING/v2019-01/ 47 GB DEFAULT SETTING
PARANOX ship plume model README $ROOT/PARANOX/v2015-02 162 MB DEFAULT SETTING
  • Computes the aging of emissions in ship exhaust plumes.
AeroCom volcanic emissions README $ROOT/VOLCANO/v2019-08 660 MB DEFAULT SETTING
Optional inventories (turned OFF by default in the standard emissions configuration)
DEAD dust model README $ROOT/DUST_DEAD/2014-07 712 KB OPTIONAL
  • May be used instead of offline dust emissions
MEGAN biogenic emissions README $ROOT/MEGAN/v2018-05 12 MB OPTIONAL
  • May be used instead of offline biogenic VOC emissions
NO from soils/fertilizers README $ROOT/SOILNOX/v2014-07 79 MB OPTIONAL
  • May be used instead of offline soil NOx emissions
GINOUX dust model README $ROOT/DUST_GINOUX/2014-07 36 KB OPTIONAL
  • You can use this in place of the DEAD dust model.
Obsolete inventories (superseded by newer developments)
NO from lightning README $ROOT/LIGHTNOX/v2017-09 8.5 MB OBSOLETE
  • Superseded by OFFLINE_LIGHTNING/2019-01
DMS ocean exchange README $ROOT/DMS/v2014-07 2.2 MB OBSOLETE
  • Superseded by the Lana 2011 climatology
MEGAN biogenic emissions README $ROOT/MEGAN/v2015-02 2.0 MB OBSOLETE
  • Superseded by MEGAN/v2017-07 and MEGAN/v2018-05.

Future and historical emissions

The following subdirectories of the HEMCO directory tree contain historical and future emissions inventories.

Inventory Data file info Path Directory size Status
RCP future scenarios README $ROOT/RCP/v2015-02 368 MB OPTIONAL
  • RCP emissions are not part of the standard GEOS-Chem emissions configuration but may be used as a research option.

GEOS-Chem specialty simulation data

The following subdirectories of the HEMCO directory tree input data (emissions, oxidants, etc.) for use with the GEOS-Chem specialty simulations. If you do not regularly use these simulations, you may choose not to download these data directories.

Inventory Data file info Path Directory size Status
Active inventories (turned ON by default in the standard emissions configuration)
Aerosol-only simulation README $ROOT/OFFLINE_AEROSOL/v2014-09 165 MB DEFAULT SETTING
CH4 simulation README1
README2 		$ROOT/CH4/v2017-10
$ROOT/CH4/v2014-09 		274 MB DEFAULT SETTING
CO2 simulation README1
README2
README3
README4
README5
README6 		$ROOT/CO2/v2015-04
$ROOT/CO2/v2015-04/BIO/
$ROOT/CO2/v2015-04/BIOFUEL/
$ROOT/CO2/v2015-04/CHEM/
$ROOT/CO2/v2015-04/FOSSIL/
$ROOT/CO2/v2015-04/OCEAN/ 		1033 MB DEFAULT SETTING
Mercury simulation README1
README2
README3
README4
README5
README6
README7
README8
README9
README10 		$ROOT/MERCURY/v2014-09
$ROOT/MERCURY/v2014-09/ARTISANAL
$ROOT/MERCURY/v2014-09/BrOx
$ROOT/MERCURY/v2014-09/Hg2_PARTITION
$ROOT/MERCURY/v2014-09/JVALUES
$ROOT/MERCURY/v2014-09/NATURAL
$ROOT/MERCURY/v2014-09/NEI2005
$ROOT/MERCURY/v2014-09/OCEAN
$ROOT/MERCURY/v2014-09/SOIL
$ROOT/MERCURY/v2014-09/STREETS 		342 MB DEFAULT SETTING
POPs simulation README $$ROOT/POPs/v2015-08 809 MB DEFAULT SETTING
RRTMG radiative transfer model README $ROOT/RRTMG/v2018-11 19 MB DEFAULT SETTING
Tagged CO simulation README $ROOT/TAGGED_CO/v2017-04 260 KB DEFAULT SETTING
Tagged O3 simulation README $ROOT/TAGGED_O3/v2014-09 372 MB DEFAULT SETTING
O3 for offline simulations README $ROOT/O3/v2014-09 130 MB DEFAULT SETTING
OH for offline simulations
README1
README2 		$ROOT/OH/v2014-09
$ROOT/OH/v2014-09/v5-07-08
$ROOT/OH/v2014-09/v7-02-03.GMI 		148 MB DEFAULT SETTING
H2O2 for offline simulations README $ROOT/OXIDANTS/v2014-07 32 MB DEFAULT SETTING
Oceanic Chlorophyll-A for Hg simulations README $ROOT/CHLA/v2014-07 2.0 MB DEFAULT SETTING
Obsolete inventories (superseded by newer developments)
CH3I simulation README $ROOT/CH3I/v2014-07 280 KB OBSOLETE
  • This simulation is no longer used in GEOS-Chem (awaiting revival)
POPs simulation README $ROOT/POPs/v2014-09 622 MB OBSOLETE
  • Superseded by v2015-08
Tagged CO simulation README $ROOT/TAGGED_CO/v2014-08q 260 KB OBSOLETE
  • Superseded by v2017-04

--Bob Yantosca (talk) 19:01, 2 July 2018 (UTC)

Halogen emissions

The following subdirectories of the HEMCO directory tree contain inventories of bromine and iodine emissions.

NOTE: See our Non-emissions data section for information about stratospheric bromine concentration data.

Inventory Data file info Path Directory size Status
Liang et al VSL emissions README $ROOT/BROMINE/v2015-02 156 KB DEFAULT SETTING
Ordonez et al Iodine emissions README $ROOT/IODINE/v2017-09 4.4 MB DEFAULT SETTING

Natural emissions data

The following subdirectories of the HEMCO directory tree contain inventories natural emissions.

Inventory Data file info Path Directory size Status
GEIA NH3 (natural source) README $ROOT/NH3/v2014-07 8.1 MB DEFAULT SETTING
NH3 emissions from arctic sea birds README HEMCO/NH3/v2018-04/ 104 MB DEFAULT SETTING
ALD2 and EOH emissions from decaying plants README $ROOT/ALD2/v2017-03 8.1 MB DEFAULT SETTING

Non-emissions data

The following subdirectories of the HEMCO directory tree input data contains non-emissions data sets. Most of these are used as inputs to GEOS-Chem's chemistry modules (i.e. photolysis, stratospheric chemistry, etc.).

Inventory Data file info Path Directory size Status
Active inventories (turned ON by default in the standard emissions configuration)
Timezone offsets from UTC README $ROOT/TIMEZONES/v2015-02 264 KB DEFAULT SETTING
  • Used by HEMCO to compute emissions that depend on local time rather than on UTC time.
UV surface albedoes README $ROOT/UVALBEDO/v2019-06 476 KB DEFAULT SETTING
TOMS/SBUV O3 columns README $ROOT/TOMS_SBUV/v2019-06 21 MB DEFAULT SETTING
Stratospheric Bry from CCM README $ROOT/STRAT/v2015-01/Bry 385 MB DEFAULT SETTING
  • Required for the for the full-chemistry simulations.
GMI strat chem mechanism README $ROOT/GMI/v2015-02 16 GB DEFAULT SETTING
  • Used to compute P & L of species in the stratosphere.
UCX chemistry mechanism README $ROOT/UCX/v2018-02 12 GB DEFAULT SETTING
  • Used to compute P & L of species in the stratosphere.
  • Can be used instead of GMI.
MODIS XLAI
(leaf area index per land type) 		README $ROOT/MODIS_XLAI/v2017-07 203 MB TDEFAULT SETTING
Olson land map
(masks for each land type) 		README $ROOT/OLSON_MAP/v2019-02 1.9 MB TDEFAULT SETTING
  • Added in GEOS-Chem 12.3.0
  • Used for regridding of MODIS_XLAI or Yuan_XLAI via HEMCO
Yuan-processed MODIS XLAI
(leaf area index per land type) 		README $ROOT/Yuan_XLAI/v2019-03 203 MB TDEFAULT SETTING
Obsolete inventories (superseded by newer developments)
TOMS/SBUV O3 columns README $ROOT/TOMS_SBUV/v2015-03 17 MB OBSOLETE
  • Superseded by v2016-11

Other inputs for HEMCO

The following subdirectories of the HEMCO directory tree input data for various HEMCO functions. These include regional masks, emission scale factors, and grid information.

Inventory Data file info Path Directory size Status
Active inventories (turned ON by default in the standard emissions configuration)
Annual scale factors README $ROOT/AnnualScalar/v2014-07 3.0 MB DEFAULT SETTING
  • Used to scale NEI2005 and other emissions to years other than the inventory base year.
NEI2005 scale factors README $ROOT/NEI2005/v2014-09 8.1 MB DEFAULT SETTING
ID codes for each country README $ROOT/COUNTRY_ID/v2015-04 15 MB DEFAULT SETTING
  • ISO ALPHA-3 standard country codes are contained on an 0.1° x 0.1° grid. HEMCO can use these ID's to apply country-level scale factors to any emissions field.
Mask files for regional emissions README $ROOT/MASKS/v2014-07 51 MB DEFAULT SETTING
  • Masks define the geographical regions where the various regional emissions (e.g. BRAVO, CAC, NEI) are to be applied.
MAP_A2A regridding data README $ROOT/MAP_A2A/v2014-07 152 KB DEFAULT SETTING
Obsolete inventories (superseded by newer developments)
Weekly scale factors README $ROOT/WEEKSCALE/v2014-07 4.0 KB OBSOLETE
  • Not currently in use

--Bob Yantosca (talk) 19:05, 2 July 2018 (UTC)

The hemco_data_download package

Obtaining the hemco_data_download package

Obsolete.jpg

The hemco_data_download package will be retired in GEOS-Chem 12.7.0 in favor of the GEOS-Chem dry run option.

To obtain the hemco_data_download package, use Git to clone this repository 

git clone https://github.com/GCST/hemco_data_download.git

This will create a directory named hemco_data_download, in which you should see the following files:

File Description
README File with an overall description of the directory contents
hemcoDataDownload.pl Perl script to download HEMCO data directories
hemcoDataDownload.rc Configuration file for the hemcoDataDownload.pl script. In this file you can specify which HEMCO data directories you would like to download and which you would like to omit.
forTesting.rc A configuration file that you can use for testing or debugging. This will tell hemcoDataDownload.pl only to download a couple of emissions inventories with files that do not take up much disk space.

--Bob Yantosca (talk) 17:02, 5 December 2016 (UTC)

Setting up the configuration file

Obsolete.jpg

The hemco_data_download package will be retired in GEOS-Chem 12.7.0 in favor of the GEOS-Chem dry run option.

The configuration files (i.e. hemcoDataDownload.rc and forTesting.rc) are pretty much self-explanatory.

At the top of the configuration file you will see this section: 

###############################################################################
#                                                                             #
#  Specify the remote and local HEMCO data paths, plus other options.         #
#                                                                             #
###############################################################################

Remote HEMCO data path | ftp://ftp.as.harvard.edu/gcgrid/data/ExtData/HEMCO
Your HEMCO data path   | /as/scratch/bmy/HEMCO
Verbose output         | yes
Dryrun only?           | no
Path Description
Remote HEMCO data path Location on the FTP server from which you are going to download the data. This can be from either Harvard or from Dalhousie. (For now we will use the Harvard server). You can edit this accordingly.
Your HEMCO data path The root-level directory for HEMCO data on your own disk space. If you are not sure where to place this, then ask your sysadmin.
Verbose output Lets you specify if you want to print out extra output during the download process. This can be set to either "yes" or "no".
Dryrun only Allows you to print out the data download commands without actually downloading the data. This is useful for debugging. This can be set to either "yes" or "no".

In the next section you specify all of the HEMCO inventories that you want to download. You will see this header: 

###############################################################################
#                                                                             #
#  THE FOLLOWING DATA DIRECTORIES WILL BE DOWNLOADED.                         #
#                                                                             #
#  These data directories comprise the recommended emissions configuration    #
#  for typical GEOS-Chem full-chemistry and specialty simulations.            #
#                                                                             #
#  NOTE: In most cases, you only have to specify the top-level folder.        #
#  All subfolders will be downloaded automatically.                           #
#                                                                             #
###############################################################################

#=============================+================================================
# AEROSOLS                    | Directory paths
#=============================+================================================
AEROCOM volcano emissions     | $ROOT/VOLCANO/v2014-10
Bond et al BC/OC              | $ROOT/BCOC_BOND/v2014-07
Cooke et al BC/OC             | $ROOT/BCOC_COOKE/v2014-07
Secondary organic aerosols    | $ROOT/SOA/v2014-07
... etc ...

Each line specifies the name of a HEMCO emissions inventory and the data path where it can be found on disk, relative to the root data path. NOTE: The script will replace the $ROOT token with the value you gave to the "HEMCO remote data path" above. (Lines starting with the comment character # will be ignored.)

Any inventory found in this section will be downloaded. To prevent an inventory from being downloaded you can either comment it out (i.e. place a # in the first column) or move the inventory to the next section.

The final section specifies HEMCO emission inventories that you do not wish to download. The section looks like this: 

###############################################################################
#                                                                             #
#  THE FOLLOWING DATA DIRECTORIES WILL NOT BE DOWNLOADED.                     #
#                                                                             #
#  These data directories contain are optional emissions inventories that     #
#  are not used in typical GEOS-Chem simulations.  If you wish to download    #
#  any of these inventories, simply move the corresponding entry for each     #
#  inventory to the previous section.                                         #
#                                                                             #
###############################################################################

CH3I simulation (obsolete)    | $ROOT/CH3I/v2014-07
Chlorophyll A                 | $ROOT/CHLA/v2014-07
... etc ...

--Bob Y. 13:55, 12 February 2015 (EST)

Downloading the data

Obsolete.jpg

The hemco_data_download package will be retired in GEOS-Chem 12.7.0 in favor of the GEOS-Chem dry run option.

Once you have set up your configuration file, you can run the hemcoDataDownload.pl script to start downloading the HEMCO data to your local server. To run the script you can type: 

hemcoDataDownload.pl

If you do not specify a configuration file name, then the hemcoDataDownload.pl scriptwill read the default configuration file hemcoDataDownload.rc configuration file. If you wish to specify a different configuration file name, simply pass that as an argument to the script, e.g. 

hemcoDataDownload.pl myNewConfigFile.rc

Before you start downloading GB's of data, we recommend that you run a short test to make sure that the data directories are being copied to the proper locations on your disk server. For this purpose, we have provided a configuration file named forTesting.rc. Typing 

hemcoDataDownload.pl forTesting.pl

will only download a couple of data inventories that do not take up much disk space. This allows you to ensure that the data transfer is sucessful without making you wait a long time.

--Bob Y. 13:57, 12 February 2015 (EST)

Submitting new data for use with HEMCO

If you have a new emissions inventory or other atmospheric data set that you would like to add to the HEMCO data directories, then please contact the GEOS-Chem Support Team. Data files must be in COARDS-compliant or CF-compliant netCDF format. Please see the following pages for more information:

  1. Preparing data files for use with HEMCO
  2. Submitting updates for inclusion in GEOS-Chem

--Bob Yantosca (talk) 22:24, 14 January 2020 (UTC)

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