.. _gcid:

#################################
GEOS-Chem Input Data on AWS cloud
#################################

The `GEOS-Chem Input Data
<https://aws.amazon.com/marketplace/pp/prodview-gsu7hiudejnxq>`_
portal provides essential datasets for `GEOS-Chem Classic
<https://geos-chem.readthedocs.io/en/stable/>`_, `GCHP
<https://gchp.readthedocs.io/en/stable/>`_, and
`HEMCO  <https://hemco.readthedocs.io/en/stable>`_.
This includes NASA/GMAO MERRA-2 and GEOS-FP :ref:`meteorological
products <gcid-data-org-met>`, :ref:`chemistry input data
<gcid-data-org-chem-inputs>`, :ref:`emissions input data
<gcid-data-org-emis-inputs>`, and other smaller datasets such as model
:ref:`initial conditions <gcid-data-org-init-cond>`.  We will
continuously upload and maintain the data in an S3 Bucket
(`s3://geos-chem <https://geos-chem.s3.amazonaws.com/index.html>`_)
for convenient access.

.. note::

   We are pleased to announce that the GEOS-Chem Input Data portal is
   part of the `AWS Open Data Sponsorship Program
   <https://aws.amazon.com/opendata/open-data-sponsorship-program/>`_.
   As a result, **the data is completely free to use**.  You will NOT
   incur any data egress fees when downloading data from the
   `s3://geos-chem <https://geos-chem.s3.amazonaws.com/index.html>`_
   bucket.  This is now the recommended repository for GEOS-Chem data
   download.

In the following chapters, we will describe how the GEOS-Chem Input
Data portal is organized and how to access the data stored there.

.. toctree::
   :maxdepth: 2

   ./gcid-why-on-cloud
   ./gcid-data-on-aws
   ./gcid-awscli-tutorial