Jupyter Notebooks for the Retrieval of AORC Data for Hydrologic Analysis


Authors:
Owners: Ayman NassarDavid TarbotonHoma SalehabadiAnthony M. Castronova
Type: Resource
Storage: The size of this resource is 5.1 MB
Created: Mar 18, 2024 at 7:24 p.m.
Last updated: Mar 07, 2025 at 11:40 p.m.
Citation: See how to cite this resource
Content types: Geographic Feature Content 
Sharing Status: Public
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Abstract

This HydroShare resource contains Jupyter Notebooks with instructions and code for accessing and subsetting the NOAA Analysis of Record for Calibration (AORC) dataset. The resource includes two Jupyter Notebooks:
1. AORC_Point_Data_Retrieval.ipynb: Retrieves data for a specific point within the U.S. AORC coverage area, specified using geographic coordinates.
2. AORC_Zone_Data_Retrieval.ipynb: Retrieves data for an area defined by an uploaded polygon shapefile.
These notebooks programmatically retrieve the data from Amazon Web Services (https://registry.opendata.aws/noaa-nws-aorc/) , aggregate data at user-defined time scales (which may differ from NOAA’s original time steps), and, in the case of shapefile-based data retrieval, compute the average over the shapes in the given shapefile.
The provided notebooks are coded to retrieve data from AORC version 1.1 released in ZARR format in December 2023.

The Analysis Of Record for Calibration (AORC) is a gridded record of near-surface weather conditions covering the continental United States and Alaska and their hydrologically contributing areas (https://registry.opendata.aws/noaa-nws-aorc/) It is defined on a latitude/longitude spatial grid with a mesh length of 30 arc seconds (~800 m), and a temporal resolution of one hour. Elements include hourly total precipitation, temperature, specific humidity, terrain-level pressure, downward longwave and shortwave radiation, and west-east and south-north wind components. It spans the period from 1979 across the Continental U.S. (CONUS) and from 1981 across Alaska, to the near-present (at all locations). This suite of eight variables is sufficient to drive most land-surface and hydrologic models and is used as input to the National Water Model (NWM) retrospective simulation. While the original NOAA process generated AORC data in netCDF format, the data has been post-processed to create a cloud optimized Zarr formatted equivalent that NOAA also disseminates.

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Place/Area Name:
US
North Latitude
49.1415°
East Longitude
-76.0062°
South Latitude
24.8306°
West Longitude
-125.0495°

Temporal

Start Date: 02/01/1979
End Date: 01/31/2023
Leaflet Map data © OpenStreetMap contributors

Content

    No files to display.

Data Services

The following web services are available for data contained in this resource. Geospatial Feature and Raster data are made available via Open Geospatial Consortium Web Services. The provided links can be copied and pasted into GIS software to access these data. Multidimensional NetCDF data are made available via a THREDDS Data Server using remote data access protocols such as OPeNDAP. Other data services may be made available in the future to support additional data types.

Related Resources

This resource belongs to the following collections:
Title Owners Sharing Status My Permission
Hydrological Data Retrieval Using CIROH JupyterHUB Ayman Nassar · David Tarboton  Public &  Shareable Open Access
Curated List of Datasets for the CIROH Portal Dan Ames  Public &  Shareable Open Access

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Oceanic and Atmospheric Administration (NOAA), University of Alabama CIROH: Enabling collaboration through data and model sharing with CUAHSI HydroShare NA22NWS4320003 to University of Alabama, subaward A23-0266-S001 to Utah State University
National Science Foundation HDR Institute: Geospatial Understanding through an Integrative Discovery Environment 2118329

How to Cite

Nassar, A., D. Tarboton, H. Salehabadi, A. M. Castronova, P. Dash (2025). Jupyter Notebooks for the Retrieval of AORC Data for Hydrologic Analysis, HydroShare, http://www.hydroshare.org/resource/72ea9726187e43d7b50a624f2acf591f

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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