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- W3135503826 abstract "<p>The shape of soil-mantled hillslopes is typically attributed to erosion rate and the transport efficiency of the various processes that contribute to soil creep. While climate is generally hypothesized to have an important influence on soil creep rates, a lack of uniformity in the measurement of transport efficiency has been an obstacle to evaluating the controls on this important landscape parameter. We addressed this problem by compiling a data set in which the transport efficiency has been calculated using a single method, the analysis of hilltop curvatures using 1-m LiDAR data, and the erosion rates have also been determined via a single method, in-situ &#160;<sup>&#173;</sup>cosmogenic <sup>10</sup>Be concentrations. Moreover, to control for lithology, we chose sites that are only underlain by resistant bedrock. The sites span a range of erosion rates (6 &#8211; 1373 mm/kyr), annual precipitation (31 &#8211; 320 cm/yr), and aridity index (0.08 &#8211; 1.38). Surprisingly, we find that hilltop curvature varies with the square root of erosion rate, whereas previous studies predict a linear relationship. In addition, we find that the inferred transport coefficient also varies with the square root of erosion rate but is insensitive to climate. We explore various mechanisms that might link the transport coefficient to the erosion rate and conclude that present theory regarding soil-mantled hillslopes is unable to explain our results and is, therefore, incomplete. Finally, we tentatively suggest that bedrock processes may be responsible for the shape of hillslope profiles at our sites.</p>" @default.
- W3135503826 created "2021-03-15" @default.
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- W3135503826 date "2021-03-04" @default.
- W3135503826 modified "2023-09-25" @default.
- W3135503826 title "Rapidly eroding hilltops are surprisingly smooth: ridgetop curvature varies with the square root of erosion rate " @default.
- W3135503826 doi "https://doi.org/10.5194/egusphere-egu21-12536" @default.
- W3135503826 hasPublicationYear "2021" @default.
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