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Data associated with Geomorphic controls on floodplain soil organic carbon in the Yukon Flats, interior Alaska, from reach to river basin scales

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dc.contributor.authorLininger, K. B.
dc.contributor.authorWohl, E.
dc.contributor.authorRose, J. R.
dc.date.accessioned2018-02-06T18:56:35Z
dc.date.available2018-02-06T18:56:35Z
dc.date.issued2018
dc.descriptionThe dataset describes floodplain soil samples taken from the Yukon Flats region in interior Alaska, which were analyzed for organic carbon concentration, soil texture, and soil moisture. Statistical models were used to assess the geomorphic controls on floodplain soil organic carbon. These data were collected in the Yukon Flats Region during Summer 2014 and Summer 2015.
dc.descriptionDepartment of Geosciences
dc.description.abstractFloodplains accumulate and store organic carbon (OC) and release OC to rivers, but studies of floodplain soil OC come from small rivers or small spatial extents on larger rivers in temperate latitudes. Warming climate is causing substantial change in geomorphic process and OC fluxes in high latitude rivers. We investigate geomorphic controls on floodplain soil OC concentrations in active-layer mineral sediment in the Yukon Flats, interior Alaska. We characterize OC along the Yukon River and four tributaries in relation to geomorphic controls at the river basin, segment, and reach scales. Average OC concentration within floodplain soil is 2.8% (median = 2.2%). Statistical analyses indicate that OC varies among river basins, among planform types along a river depending on the geomorphic unit, and among geomorphic units. OC decreases with sample depth, suggesting that most OC accumulates via autochthonous inputs from floodplain vegetation. Floodplain and river characteristics, such as grain size, soil moisture, planform, migration rate, and riverine DOC concentrations, likely influence differences among rivers. Grain size, soil moisture, and age of surface likely influence differences among geomorphic units. Mean OC concentrations vary more among geomorphic units (wetlands = 5.1% vs. bars = 2.0%) than among study rivers (Dall River = 3.8% vs. Teedrinjik River = 2.3%), suggesting that reach-scale geomorphic processes more strongly control the spatial distribution of OC than basin-scale processes. Investigating differences at the basin and reach scale is necessary to accurately assess the amount and distribution of floodplain soil OC, as well as the geomorphic controls on OC.
dc.description.awardNational Science Foundation (NSF) DGE-1321845.
dc.description.awardNational Geographic Society 9449-14.
dc.format.mediumZIP
dc.format.mediumCSV
dc.identifier.urihttps://hdl.handle.net/10217/185889
dc.identifier.urihttps://dx.doi.org/10.25675/10217/185889
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Librariesen_US
dc.relation.ispartofResearch Data
dc.relation.isreferencedbyLininger, K. B., Wohl, E., & Rose, J. R. (2018). Geomorphic controls on floodplain soil organic carbon in the Yukon Flats, interior Alaska, from reach to river basin scales. Water Resources Research, 54. https://doi.org/10.1002/2017WR022042
dc.subjectorganic carbon
dc.subjectYukon River
dc.subjectAlaska
dc.subjectgeomorphic units
dc.subjectfloodplain
dc.subjectfluvial geomorphology
dc.titleData associated with Geomorphic controls on floodplain soil organic carbon in the Yukon Flats, interior Alaska, from reach to river basin scalesen_US
dc.typeDataseten_US

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