Request to create a new GCMD keyword for the project "MERRA‑21C"

[GES DISC - xpan2]

The short name is "MERRA‑21C".
The full project name is "Modern‑Era Retrospective analysis for Research and Applications – early 21st Century".
After creating this GCMD keyword, please add the project to the Earthdata Forum in the category of "project". Thanks.

[GCMD - tstevens]

Thank you for your keyword request. Please confirm that you want the following new project keyword:
short name > long name
MERRA 21C > Modern Era Retrospective analysis for Research and Applications – early 21st Century

[GES DISC - xpan2]

Thanks for checking with me. Here you are:

MERRA-21C > Modern-Era Retrospective analysis for Research and Applications – early 21st Century

[GCMD - tstevens]

Thank you for the clarification. Can you please provide an appropriate definition and reference URL for the project keyword?

[GES DISC - xpan2]

Sure, I will provide the definition.

Just want to add a request: please also add MERRA-21C to the keyword: "Platform"

Other > Models > MERRA-21C > Modern-Era Retrospective analysis for Research and Applications – early 21st Century.

[GCMD - tstevens]

@GES DISC - xpan2

Thank you. I will add those keywords. When you have the definition and reference, I will add those.

[GES DISC - xpan2]

To give you exact what you need, can you let us know what "definition" and "reference" mean in this context? Do you have an example?

[GCMD - tstevens]

Here is an example of a definition and reference from another MERRA project keyword.

Definition: MERRA is a NASA reanalysis for the satellite era using a major new version of the Goddard Earth Observing System Data Assimilation System Version 5 (GEOS-5). The Project focuses on historical analyses of the hydrological cycle on a broad range of weather and climate time scales and places the NASA EOS suite of observations in a climate context.

Reference: https://gmao.gsfc.nasa.gov/gmao-products/merra/

[GES DISC - xpan2]

Thanks for the example!
For MERRA-21C:

Definition: The Modern-Era Retrospective analysis for Research and Applications (MERRA) - the early 21st century (21C) is NASA’s global atmospheric reanalysis beginning in 1998, building on MERRA-2 with approximately 25-km horizontal resolution, hybrid four-dimensional ensemble-variational data assimilation, and updated atmospheric and aerosol modeling, while providing hourly products and specialized collections for planetary boundary layer (PBL) studies, the Fire Weather Index, and ensemble-based uncertainty estimates for selected variables.

Reference:
https://gmao.gsfc.nasa.gov/gmao-products/merra-21c/