@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix org: <http://www.w3.org/ns/org#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.nasa.gov/dataset/c9b652c9-6f06-4c95-9228-8b9adbea3b71> a dcat:Dataset ;
    dct:description "This dataset provides Synthetic Aperture Radar (SAR) estimates of lake-source methane ebullition flux in mg CH4/m2/d for thousands of lakes in five regions across Alaska. The study regions include the Atqasuk, Barrow Peninsula, Fairbanks, northern Seward Peninsula, and Toolik. L-band SAR backscatter values for early winter lake ice scenes were collected from 2007 to 2010 over 5,143 lakes using the Phased Array type L-band Synthetic Aperture Radar (PALSAR) instrument on the Advanced Land Observing Satellite (ALOS-1) satellite. The backscatter data were combined with field measurements of methane ebullition from 48 study lakes across the five regions to obtain a volumetric flux estimate for each lake. Mean methane gas-fractions from each region were applied to the SAR-based volumetric fluxes to obtain an estimate of methane ebullition mass flux per lake. The data files contain lake perimeters and the lake-specific attributes of lake area, SAR backscatter values and standard errors, volumetric flux with standard errors, mean percent of methane from gas samples, and methane ebullition mass flux." ;
    dct:identifier "10.3334/ORNLDAAC/1790" ;
    dct:issued "2025-04-01T14:08:24.403996"^^xsd:dateTime ;
    dct:modified "2026-10-15T20:12:05+00:00"^^xsd:dateTime ;
    dct:publisher <https://data.nasa.gov/organization/dbb294e4-8597-44f5-aaf4-c0baac12cdbc> ;
    dct:spatial [ a dct:Location ] ;
    dct:title "ABoVE: SAR-based Methane Ebullition Flux from Lakes, Five Regions, Alaska, 2007-2010" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Earthdata Forum" ;
            vcard:hasEmail <mailto:earthdata-support@nasa.gov> ] ;
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        "earth-science-surface-water-terrestrial-hydrosphere-surface-water-features" ;
    dcat:theme <%7B%22Earth%20Science%22%7D> .

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<https://data.nasa.gov/dataset/c9b652c9-6f06-4c95-9228-8b9adbea3b71/resource/4f5a1c34-334c-44af-a278-4b07b9154ea0> a dcat:Distribution ;
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<https://data.nasa.gov/dataset/c9b652c9-6f06-4c95-9228-8b9adbea3b71/resource/5dfdc85c-abb6-4047-be1a-40e3342811ac> a dcat:Distribution ;
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    dct:modified "2026-03-10T04:24:08.371292"^^xsd:dateTime ;
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<https://data.nasa.gov/dataset/c9b652c9-6f06-4c95-9228-8b9adbea3b71/resource/94e1f511-f51c-441a-954a-aec34ca73ece> a dcat:Distribution ;
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    dct:modified "2026-06-02T15:54:26.524545"^^xsd:dateTime ;
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    dct:modified "2026-06-02T15:54:26.524670"^^xsd:dateTime ;
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<https://data.nasa.gov/dataset/c9b652c9-6f06-4c95-9228-8b9adbea3b71/resource/bf498fb7-4d9f-4432-af69-a23e6e463f53> a dcat:Distribution ;
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<https://data.nasa.gov/organization/dbb294e4-8597-44f5-aaf4-c0baac12cdbc> a org:Organization ;
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