English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Rock is exposed at the Earth surface when rates of erosion locally exceedrates of soil production. The thinning of soils and emergence of bedrock hasimplications spanning geomorphology, ecology and hydrology. Soil-mantledhillslopes are typically shaped by diffusion-like sediment transportprocesses that act to smooth topography through time, generating thefamiliar smooth, convex hillslope profiles that are common in low relieflandscapes. Other processes, however, can roughen the landscape. Bedrockemergence can produce rough terrain; in this contribution we exploit thecontrast between rough patches of bedrock outcrop and smooth, diffusion-dominated soil to detect bedrock outcrops. Specifically, we demonstrate thatthe local variability of surface normal vectors, measured from 1 m resolutionairborne LiDAR data, can be used as a topographic signature toidentify areas within landscapes where rock exposure is present. We then usethis roughness metric to investigate the transition from soil-mantled tobedrock hillslopes as erosion rates increase in two transient landscapes,Bald Rock Basin, which drains into the Middle Fork Feather River,California, and Harrington Creek, a tributary of the Salmon River, Idaho.Rather than being abrupt, as predicted by traditional soil productionmodels, in both cases the transition from fully soil-mantled to bedrockhillslopes is gradual and spatially heterogeneous, with rapidly erodinghillslopes supporting a patchwork of bedrock and soil that is welldocumented by changes in topographic roughness, highlighting the utility ofthis metric for testing hypotheses concerning the emergence of bedrock andadding to a growing body of evidence that indicates the persistence ofpartial soil mantles in steep, rapidly eroding landscapes

Topographic roughness as a signature of the emergence of bedrock in eroding landscapes