CONUS404 PGW climate forcing variable subset for hydrologic models, 1979-2024: downscaled to 1 km and bias-adjusted for precipitation and temperature

Overview
This metadata record serves as documentation for the bias adjusted (BA) version of the CONUS404 pseudo-global warming (PGW) atmospheric forcing dataset at 1-kilometer grid spacing (for the original PGW dataset, see Xue and others, 2024). This dataset covers a future-perturbed 45-year period (water years 1980-2024, October 1, 1979-September 30, 2024) and has sufficient temporal and spatial detail to resolve mesoscale atmospheric processes, making it appropriate for forcing hydrological models and conducting meteorological analyses to study one possible scenario of climate changes and resultant hydrologic impacts over the conterminous United States (CONUS).

The CONUS404 PGW simulation was run by National Center for Atmospheric Research (NCAR) as part of a collaboration with the U.S. Geological Survey (USGS) Water Mission Area. It is the output of the Weather Research and Forecasting (WRF) v 3.9.1.1 model (Skamarock and others, 2008), forced with European Centre for Medium-Range Weather Forecasts (ECMWF) fifth generation atmospheric reanalysis (ERA5) data (Hersbach and others, 2020) plus Community Earth System Model 2 (CESM2) Large Ensemble Community Project (LENS2) projected climate perturbations (Rodgers and others, 2021).

This data release includes the CONUS404 PGW bias adjusted (BA) outputs (CONUS404 PGW BA). The adjustment grids that were used in the bias adjustment process contain the day of year bias value needed for the bias adjustment process and were previously published with the bias-adjusted CONUS404 historical data release (Zhang and others, 2024). The CONUS404 PGW BA outputs are approximately 65 TB in size and contain downscaled hourly data for U-component of wind, V-component of wind, downward longwave radiation, downward shortwave radiation, air temperature, water vapor mixing ratio, surface pressure, and accumulated precipitation variables. For definition of these variables, see the attribute table included in this metadata. The air temperature and accumulated precipitation variables were both downscaled and bias adjusted while the remaining variables were just downscaled. For information on the downscaling and bias adjustments conducted on these data, see the processing steps section in this metadata.

Access to Dataset
Data files for this data release are large and cannot be easily downloaded through standard protocols. Therefore, the data files are being archived on the USGS Black Pearl tape drive system and can be accessed through a Globus Access Portal  here: https://app.globus.org/file-manager?origin_id=4894ea73-67ff-436e-ad39-a…. Globus* is a fast, secure, and reliable way to move large data files and will automatically resume transfers when there are network disruptions. To access the files, you will need to log in with an existing Globus account or create one and then perform a file transfer. If you are transferring the files to your local computer, you will also want to install and set up Globus Connect Personal to turn your local machine into an available Globus endpoint. There is no cost for a Globus account. Once Globus is set up, you are ready to access the raw output files. The CONUS404 PGW BA outputs are organized into folders by water year (for example, “WY2020”).
* Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.