GEOS-Chem input data

Data organization

The GEOS-Chem Input Data is structured into the following main categories (For more information , see Download input data):

  1. Initial conditions input data (aka Restart files)

  2. Chemistry input data

  3. Emissions input data

  4. Meteorology input data

Initial conditions input data

Initial conditions include initial species concentrations (aka Restart files) used to start a GEOS-Chem simulation.

Chemistry input data

Chemistry input data includes:

  • Quantum yields and cross sections for photolysis using either Cloud-J or legacy FAST-JX

  • Climatology data for Linoz

  • Boundary conditions for UCX stratospheric chemistry routines

Emissions input data

Emissions input data includes the following data:

  • Emissions inventories

  • Input data for HEMCO Extensions

  • Input data for GEOS-Chem specialty simulations

  • Scale factors

  • Mask definitions

  • Surface boundary conditions

  • Leaf area indices

  • Land cover map

Meteorology input data

GEOS-Chem Classic be driven by the following meteorology products:

  1. MERRA-2

  2. GEOS-FP

  3. GCAP 2.0

Attention

We are still evaluating GEOS-Chem with the new NASA GEOS-IT meterorology product. For the time being, you should use one of the other meteorology options.

Access the data

Users can access the GEOS-Chem Input Data in multiple ways:

AWS S3 Bucket

The data is stored in an AWS S3 bucket. Users can navigate these directories to find the specific datasets they need.

Example commands for accessing data using AWS CLI:

aws s3 ls s3://<resource name>/
HTTP Download

The data can be downloaded from http://geoschemdata.wustl.edu/.

Users can navigate through the web interface to find and download the datasets via HTTP or wget.

Globus

The data is also available through the Globus endpoint “GEOS-Chem Data (WashU)”.

Users can use the Globus interface to transfer data to their local storage.

Example directory structure

ExtData/
│
├── GEOSCHEM-RESTARTS/
│   ├── GC_14.2.0/
│   ├── GC_14.3.0/
│   └── ...
│
├── CHEM_INPUTS/
│   ├── CLOUD-J/
│   ├── FAST-JX/
│   └── ...
│
├── HEMCO/
│   ├── UVALBEDO/
│   └── ...
│
├── GEOS_0.5x0.625/
│   ├── MERRA2/
│   │   ├── 2023/
│   │   ├── 2024/
│   │   └── ...
│   └── ...
│
├── GEOS_0.25x0.3125/
│   ├── GEOS_FP/
│   │   ├── 2023/
│   │   ├── 2024/
│   │   └── ...
│   ├── GEOS_FP_Raw/
│   └── ...
│
└── ...