{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Earthdata Forum", "hasEmail": "mailto:earthdata-support@nasa.gov"}, "description": "We conducted an experiment on sand and clay tropical forest soils to test the short-term effect of root mortality on the soil-atmosphere flux of nitrous oxide, nitric oxide, methane, and carbon dioxide.  We induced root mortality by isolating blocks of land to 1 m using trenching and root exclusion screening.  Gas fluxes were measured weekly for ten weeks following the trenching treatment.  For nitrous oxide there was a highly significant increase in soil-atmosphere flux over the ten weeks following treatment for trenched plots compared to control plots.  N2O flux averaged 37.5 and 18.5 ng N cm-2 h-1 from clay trenched and control plots and 4.7 and 1.5 ng N cm-2 h-1 from sand trenched and control plots.  In contrast, there was no effect for soil-atmosphere flux of nitric oxide, carbon dioxide, or methane.", "distribution": [{"@type": "dcat:Distribution", "conformsTo": "http://www.isotc211.org/2005/gmi", "description": "The metadata's original source.", "downloadURL": "https://cmr.earthdata.nasa.gov/search/concepts/C2777750323-ORNL_CLOUD.iso19115", "format": "ISO", "mediaType": "text/xml", "title": "Original Metadata"}, {"@type": "dcat:Distribution", "downloadURL": "https://daac.ornl.gov/graphics/browse/project/square/lba_logo_square.png", "format": "PNG", "mediaType": "image/png"}, {"@type": "dcat:Distribution", "downloadURL": "https://data.ornldaac.earthdata.nasa.gov/protected/bundle/TG07_Root_Mortality_Experiment_924.zip", "format": "ZIP", "mediaType": "application/zip"}, {"@type": "dcat:Distribution", "downloadURL": "https://data.ornldaac.earthdata.nasa.gov/public/lba/trace_gases/TG07_Root_Mortality_Experiment/comp/TG07_Root_Mortality_Experiment.pdf", "format": "PDF", "mediaType": "application/pdf"}, {"@type": "dcat:Distribution", "downloadURL": "https://doi.org/10.3334/ORNLDAAC/924", "format": "HTML", "mediaType": "text/html"}, {"@type": "dcat:Distribution", "downloadURL": "https://search.earthdata.nasa.gov/search/granules?p=C2777750323-ORNL_CLOUD", "format": "BIN", "mediaType": "application/octet-stream"}], "identifier": "10.3334/ORNLDAAC/924", "keyword": ["earth-science-atmospheric-chemistry-atmosphere-carbon-and-hydrocarbon-compounds", "earth-science-atmospheric-chemistry-atmosphere-nitrogen-compounds", "earth-science-atmospheric-temperature-atmosphere-surface-temperature", "earth-science-habitat-conversion-fragmentation-human-dimensions-deforestation", "earth-science-soils-land-surface-soil-moisture-water-content", "earth-science-soils-land-surface-soil-temperature"], "license": "https://www.usa.gov/government-works", "modified": "2026-06-22", "programCode": ["026:000"], "publisher": {"@type": "org:Organization", "name": "ORNL_DAAC"}, "spatial": "[\"CARTESIAN\", [{\"WestBoundingCoordinate\": -54.9707, \"NorthBoundingCoordinate\": -3.017, \"EastBoundingCoordinate\": -54.9707, \"SouthBoundingCoordinate\": -3.017}]]", "temporal": "2000-06-04/2001-05-15", "theme": ["Earth Science"], "title": "LBA-ECO TG-07 Soil Trace Gas Flux and Root Mortality, Tapajos National Forest"}