CONUS404: The NCAR-USGS 4-km long-term regional hydroclimate reanalysis over the CONUS

A unique, high-resolution, hydroclimate reanalysis, 40-plus-year (October 1979-September 2021), 4 km (named as CONUS404), has been created using the Weather Research and Forecasting Model by dynamically downscaling of the fifth-generation European Centre for Medium-Range Weather Forecasts (ECMWF) atmospheric reanalysis of the global climate dataset (ERA5) over the conterminous United States. The paper describes the approach for generating the dataset, provides an initial evaluation, including biases, and indicates how interested users can access the data. The motivation for creating this National Center for Atmospheric Research (NCAR)-U.S. Geological Survey (USGS) collaborative dataset is to provide research and end-user communities with a high-resolution, self-consistent, long-term, continental-scale hydroclimate dataset appropriate for forcing hydrological models and conducting hydroclimate scientific analyses over the conterminous United States. The data are archived and accessible on the USGS Black Pearl tape system and on the NCAR supercomputer Campaign storage system.

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Author Rasmussen, Roy M.
Chen, Fei ORCID icon
Liu, Changhai
Ikeda, Kyoko ORCID icon
Prein, Andreas ORCID icon
Kim, Ju-Hye ORCID icon
Schneider, Timothy ORCID icon
Dai, Aiguo ORCID icon
Gochis, David ORCID icon
Dugger, Aubrey L. ORCID icon
Zhang, Ying
Jaye, Abigail B. ORCID icon
Dudhia, Jimy ORCID icon
He, Cenlin ORCID icon
Harrold, Michelle
Xue, Lulin ORCID icon
Chen, Sisi ORCID icon
Newman, Andrew J. ORCID icon
Dougherty, Erin M. ORCID icon
Abolafia-Rosenzweig, Ronnie ORCID icon
Lybarger, Nicholas ORCID icon
Viger, R.
Lesmes, D.
Skalak, K.
Brakebill, J.
Cline, D.
Dunne, K.
Rasmussen, K.
Miguez-Macho, G.
Publisher UCAR/NCAR - Library
Publication Date 2023-08-01T00:00:00
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier N/A
Resource Version N/A
Topic Category geoscientificInformation
Progress N/A
Metadata Date 2025-12-24T19:27:22.881782
Metadata Record Identifier edu.ucar.opensky::articles:26601
Metadata Language eng; USA
Suggested Citation Rasmussen, Roy M., Chen, Fei, Liu, Changhai, Ikeda, Kyoko, Prein, Andreas, Kim, Ju-Hye, Schneider, Timothy, Dai, Aiguo, Gochis, David, Dugger, Aubrey L., Zhang, Ying, Jaye, Abigail B., Dudhia, Jimy, He, Cenlin, Harrold, Michelle, Xue, Lulin, Chen, Sisi, Newman, Andrew J., Dougherty, Erin M., Abolafia-Rosenzweig, Ronnie, Lybarger, Nicholas, Viger, R., Lesmes, D., Skalak, K., Brakebill, J., Cline, D., Dunne, K., Rasmussen, K., Miguez-Macho, G.. (2023). CONUS404: The NCAR-USGS 4-km long-term regional hydroclimate reanalysis over the CONUS. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d7qv3rjp. Accessed 21 February 2026.

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