The dataset includes daily fluxes of net ecosystem CO2 exchange (NEE, g C m-2 d-1), gross primary production (GPP, g C m-2 d-1), ecosystem respiration (ER, g C m-2 d-1), and evapotranspiration (ET, mm d-1) from 2021 to 2024 for an Old World Bluestem pasture at the USDA-ARS, El Reno, Oklahoma.
The study site, Old World Bluestem (OWB) pasture (~63 ha), was established in the 1980s on a native tallgrass prairie site. It is located at the United States Department of Agriculture \u2013 Agricultural Research Service (USDA-ARS), Oklahoma and Central Plains Agricultural Research Center, El Reno (35.5467\u00ba N, 98.0452\u00ba W, and 435 masl), Oklahoma.
The eddy covariance (EC) tower was equipped with an open-path infrared gas analyzer (LI-7500 RS, LI-COR Biosciences, Lincoln, NE, USA) integrated with a three-dimensional sonic anemometer (CSAT3, Campbell Scientific Inc., Logan, UT, USA). These sensors were mounted at a height of ~2.8 m above the ground surface. The tower had enough fetch extending several hundred meters in all directions to ensure representative flux measurements from the OWB pasture.
Raw high-frequency EC data were processed using EddyPro software (version 7.0.6, LI-COR Biosciences, Lincoln, NE, USA) in its Express configuration to compute half-hourly (30-min) fluxes. Gap-filling of half-hourly eddy fluxes and meteorological variables, as well as the partitioning of NEE (using nighttime partitioning) into its component fluxes (GPP and ER), was conducted using the REddyProc (https://www.bgc-jena.mpg.de/REddyProc/ui/REddyProc.php).
", "distribution": [{"@type": "dcat:Distribution", "downloadURL": "https://ndownloader.figshare.com/files/61586125", "format": "xlsx", "mediaType": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "title": "Daily fluxes for Ag Data Commons.xlsx"}], "identifier": "10.15482/USDA.ADC/31236016.v1", "keyword": ["Gross primary production GPP", "Net ecosystem exchange (NEE)", "Old World Bluestem", "ecosystem respiration (ER)", "eddy covariance", "evapotranspiration"], "license": "https://creativecommons.org/publicdomain/zero/1.0/", "modified": "2026-05-20", "programCode": ["005:040"], "publisher": {"@type": "org:Organization", "name": "Agricultural Research Service"}, "spatial": "{\"type\": \"Point\", \"coordinates\": [-98.0452, 35.5467]}", "temporal": "2021-01-01/2024-12-31", "title": "Data from: Carbon and water dynamics of Old World Bluestem in the U.S. Southern Great Plains"}