Gridded Hydroclimatic Data for the Contiguous USA, 2006-2021

Gridded hydroclimatic data products for the contiguous United States at 2-degree spatial and daily temporal resolution, covering 5,844 days from 2006 to 2021. The dataset includes five variables: near-surface air temperature, total precipitation, relative humidity, soil temperature, and soil moisture. ANAGHA MURALI created the dataset by interpolating station observations from NOAA's USCRN network and includes four interpolation method products alongside ERA5-Land reference data.

Use Cases

• Compare the performance of Inverse Distance Weighting and three Kriging variogram methods for spatial interpolation of climate variables.
• Validate ERA5-Land reanalysis data against a gridded product derived from over 130 USCRN station observations.
• Analyze daily trends in soil moisture and temperature across the contiguous USA from 2006 to 2021.
• Model regional hydrological processes using consistent, gridded inputs for air temperature, precipitation, and humidity.

Strengths

• Covers a 16-year time period (2006-01-01 to 2021-12-31) with daily resolution.
• Provides four distinct interpolation products (IDW and three Kriging variants) for methodological comparison.
• Includes performance metrics (e.g., RMSE and correlation) for each variable against the ERA5-Land reference.
• Uses input data from over 130 quality-controlled USCRN stations managed by NOAA.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Spatial resolution is coarse at 2 degrees, which may not capture local climate variability.

Provenance

Source

Station observations from NOAA's United States Climate Reference Network (USCRN); reference data from ECMWF ERA5-Land reanalysis.

Collection Method

Spatial interpolation (IDW and Ordinary Kriging) of station data; ERA5-Land data was coarsened from 0.1-degree to 2-degree resolution.

Time Range

2006-01-01 to 2021-12-31

Freshness

Last updated 2026-05-02 14:42:06; freshness should be verified.

Geography

Contiguous USA (25°N–49°N, 124°W–68°W)