National Land Data Assimilation Product V2

The NLDAS grid is a 1/8th degree grid that covers the entire contiguous US. This dataset contains the NLDAS2 forcing data at 1/8th degree resolution and a 1 hour time step. This dataset was used to force the conus1_baseline_mod simulation (https://hf-hydrodata.readthedocs.io/en/latest/gen_conus1_baseline_mod.html). This dataset is adjusted and bias corrected per the description in O'Neill et al GMD 2021 (https://gmd.copernicus.org/articles/14/7223/2021/).

Data and Resources

Additional Info

Field Value
Last Updated July 9, 2025, 06:11 (UTC)
Created July 9, 2025, 06:11 (UTC)
accessRights Users must create a HydroFrame API account and register their PIN before using the hf_hydrodata package. If it's your first time using this package you will need to sign up for a HydroFrame account on the HydroFrame Signup Page (https://hydrogen.princeton.edu/signup; note: this only needs to be done once). Visit our HydroFrame PIN Page (https://hydrogen.princeton.edu/pin) to create a 4-digit PIN. After creating your PIN, you must register that PIN on the machine that you intend to use.
columnDataDict Access column data dictionary at: https://hf-hydrodata.readthedocs.io/en/latest/gen_NLDAS2.html
creationMethod Heavily bias corrected per O'Neill et al GMD 2021 (https://gmd.copernicus.org/articles/14/7223/2021/). The bias correction is applied to the NLDAS2 data before it is bilinearly interpolated to the ParFlow-CONUS1 grid.
creatorEmail hydrogen-support@princeton.edu
creatorName HydroFrame Team
creatorWebsite https://hydroframe.org/
dataAuthType public
dataBbox [-121.47939483437318, 31.651836025255015, -76.09875469594509, 50.49802132270979]
dataType NumPy array
datasetPageUrl https://hf-hydrodata.readthedocs.io/en/latest/gen_NLDAS2.html
docsURL https://hf-hydrodata.readthedocs.io/en/latest/gen_NLDAS2.html
doi https://doi.org/10.5194/gmd-14-7223-2021; https://doi.org/10.1002/2016GL069964
issueDate 2021-11-30
lang en
lastUpdateDate 2021-11-30
license other
otherLicense Copyright © 2024 The Trustees of Princeton University and The Arizona Board of Regents on behalf of The University of Arizona, College of Science Hydrology & Atmospheric Sciences. All rights reserved. hf_hydrodata was created by William M. Hasling, Laura Condon, Reed Maxwell, George Artavanis, Will Lytle, Amy M. Johnson, Amy C. Defnet. It is licensed under the terms of the MIT license.
pocEmail hydrogen-support@princeton.edu
pocName HydroFrame Team
pocWebsite https://hydroframe.org/
publisherEmail hydrogen-support@princeton.edu
publisherName HydroFrame Team
publisherWebsite https://hydroframe.org/
purpose Meteorological forcing used to run the ParFlow-CONUS1 model with additional bias corrections.
spatialCov "Grid: conus1 Spatial Resolution: 1000 meters XY Grid Spatial Extent: 3342 x 1888 LatLon Spatial Exent: -121.47939483437318, 31.651836025255015, -76.09875469594509, 50.49802132270979 Origin (meters): -1885055.4995, -604957.0654 Projection: +proj=lcc +lat_1=33 +lat_2=45 +lon_0=-96.0 +lat_0=39 +a=6378137.0 +b=6356752.31"
spatialCovFormat text
spatialRes 1000 meter
status submitted
theme ["climate"]
uploadType dataset