North American Regional Climate Change Assessment Program Data

The North American Regional Climate Change Assessment Program (NARCCAP) is a collection of regional climate model simulations downscaling global simulations from CMIP3 to 50-km resolution over North America. The collection was generated in 2007-2012 with the goal of investigating uncertainties in regional scale projections of future climate and generating climate change scenarios for use in impacts research.

NARCCAP comprises a set 12 simulations from 6 RCMs downscaling 4 GCMs using a fractional factorial design, plus 1 simulation from each RCM downscaling the NCEP reanalysis, and 2 global atmosphere-only timeslice experiments. Historical data spans 1971-2000, and future data 2041-2070 using the SRES A2 emissions scenario. It includes more than 3 dozen 2D variables and a half-dozen 3D variables at 3-hourly frequencies, plus a handful of static and daily variables. All data is at 50-km spatial resolution over a domain that covers most of North America and is stored in CF-compliant netCDF files.

More detailed documentation of the dataset is available at: https://narccap.ucar.edu

To Access Resource:

Questions? Email Resource Support Contact:

  • datahelp@ucar.edu

Temporal Range

  • Begin:  1968-01-01T0000+00
    End:  2071-01-08T0600+00

Keywords

Resource Type dataset
Temporal Range Begin 1968-01-01T0000+00
Temporal Range End 2071-01-08T0600+00
Temporal Resolution N/A
Bounding Box North Lat 90.0
Bounding Box South Lat -90.0
Bounding Box West Long -180.0
Bounding Box East Long 180.0
Spatial Representation grid
Spatial Resolution 52000.0 m
0.625 degree
49000.0 m
47000.0 m
Related Links N/A
Additional Information N/A
Resource Format NetCDF
Standardized Resource Format NetCDF
Asset Size 38540358.259 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name N/A
Resource Support Email datahelp@ucar.edu
Resource Support Organization N/A
Distributor NSF NCAR Geoscience Data Exchange
Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author
Publisher NSF National Center for Atmospheric Research
Publication Date 2025-09-24
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier d316015
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-12-11T02:05:07Z
Metadata Record Identifier edu.ucar.gdex::d316015
Metadata Language eng; USA
Suggested Citation . (2025). North American Regional Climate Change Assessment Program Data. NSF National Center for Atmospheric Research. https://gdex.ucar.edu/datasets/d316015. Accessed 01 January 2026.

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